What a Construction Bid Actually Is
A construction bid is a written offer to do specific work for a specific price under specific terms. The math behind that price is what determines whether you make money or lose it, and almost nobody teaches it the way it actually plays out on a job site.
Three words get used interchangeably. They are not the same. An estimate is your internal calculation of what the job costs to build. A proposal is the document you send the client describing scope, price, schedule, and what you have excluded. A bid is a proposal submitted in response to a formal request, usually with multiple competitors quoting the same scope, often with sealed envelopes and bid bonds. A homeowner addition is a proposal. A 50,000 square foot warehouse against four other concrete subs is a bid. The math is the same; the packaging is different.
This guide covers the entire bidding process from the moment a set of plans hits your desk to the moment you sign a contract. Specific numbers, working formulas, and the mistakes that cost contractors thousands on jobs they thought they had priced right.
To bid a construction job accurately, read the plans, perform a complete takeoff, price materials with current quotes, calculate fully burdened labor cost, add equipment and subcontractors, allocate overhead, set profit, add contingency, and choose the right bid type. Most contractors lose money because they confuse markup with margin, use base hourly wage instead of burdened rate, or skip contingency entirely. This guide covers every step with real numbers and the formulas that actually work.
Before You Bid: Should You Even Be Here?
The most expensive bid you can submit is the one you should not have submitted at all.
The construction industry average bid hit ratio sits around 25%. One win for every four bids submitted. That figure comes from a survey of more than 2,000 construction companies, and it is worth pausing on, because in the same survey less than 6% of contractors knew their own bid hit ratio. Most contractors are tracking everything except the metric that determines whether they have a sustainable business.
The 25% average masks huge variation. For hard competitive bids on public projects, the typical win rate is 10 to 20%. For negotiated work and selective bid lists, win rates climb to 30 to 50%. If you are spending 20 hours putting together bids on public works and winning one in ten, you are subsidizing the agency procurement process with your unbillable estimating time.
Three questions to answer before you commit to a bid:
Is this a fit? Look at scope, size, and schedule. A roofing crew that handles 30 to 50 square residential jobs efficiently will bleed money on a 200 square commercial project that needs OSHA written safety plans, certified payroll, and a full-time job superintendent. The work might look the same on paper. The overhead profile is completely different.
Who else is bidding? On private jobs, ask. Some general contractors will tell you who is on the bid list. If you know two of the others are well-established locals with deep crews and you are an outsider trying to break into the market, your odds are not 25%. They are closer to 5%, and you should price accordingly or pass.
What is the relationship? Negotiated work with a repeat client wins at 30 to 50%. Cold bids on public projects you have never worked on win at 10 to 15%. Estimating time is the same either way. The hit ratio is what makes the math work.
The cost of bidding a job is your estimator time. A typical commercial bid takes 8 to 24 hours to put together properly. At a fully burdened estimator cost of $60 to $90 per hour, every bid costs your business $480 to $2,160 in unbillable labor. If your hit ratio is 25%, you are spending $1,920 to $8,640 in estimating time for each contract you actually win. Knowing your hit ratio by bid type tells you which work is worth chasing.
Step 1: Read the Plans Like You Mean It
Once you decide a job is worth bidding, the first move is not to start measuring. It is to read.
A complete construction document set has four parts: drawings, specifications, addenda, and contract documents. Each is enforceable. Specs override drawings. Addenda override original drawings and specs. The contract overrides everything.
The drawings show what gets built and where, organized by discipline (A-sheets architectural, S structural, M mechanical, P plumbing, E electrical). Commercial projects can run 50 to 200 sheets. Skipping the wall types schedule, the door schedule, or the finish schedule is one of the most common ways to underbid a job.
The specifications are where the architect tells you what products to use, what quality, and from which manufacturer. The drawings show a wall as Type B; the spec book is where you find out Type B means double-layer 5/8-inch Type X gypsum board on cold-rolled steel studs at 16 inches on center, taped and finished to Level 4. Estimators who skip the spec book are pricing whatever board is cheapest. Estimators who read it are pricing the assembly the architect actually specified.
Addenda are updates issued during the bid period. A late addendum that adds 200 linear feet of fire-rated demising walls 48 hours before bid submission can flip a project from profitable to disastrous if you miss it. Always confirm you have the most recent set.
The contract documents include the supplementary conditions, where general contractors put unusual requirements: 5% retainage held until 90 days after substantial completion, $2,500 per day liquidated damages for late completion. These have real cash impact on your bid, and you cannot price them if you do not know they are there.
Then visit the site. Photographs do not show how access works, where you can stage, whether there is a crane lay-down area. Ninety minutes there can save tens of thousands of dollars by catching a single condition that changes how you have to do the work. Our guide on how to measure construction drawings covers reading plans in depth, including paper sizes and the standard symbol vocabulary.
Step 2: Do the Takeoff
A takeoff is measuring the drawings to determine exactly what materials and quantities the job requires. Square feet of drywall, linear feet of pipe, cubic yards of concrete, count of receptacles. The takeoff produces quantities; the estimate assigns costs. You cannot price a job without the quantities, and you cannot know the quantities without measuring.
Organize trade by trade, even if you are the general contractor pricing the whole project. Concrete in one column, framing in another, drywall, electrical, plumbing, mechanical, finishes, sitework, each on their own line. Subcontractor scopes get totaled separately from your self-performed work because you handle them differently in the estimate.
For trade-specific procedures, our drywall takeoff guide covers wall types, ceiling assemblies, and accessory calculations in depth. Each trade page walks through measurement workflow, waste factors, and material quantities for that scope:
- Concrete takeoff for slabs, footings, walls, and rebar
- Roofing takeoff including pitch factors, hip and valley, and ridge
- Drywall takeoff for walls and ceilings by board type
- Painting takeoff including primer, finish coats, and trim
- Flooring takeoff for tile, carpet, hardwood, and LVP
- Electrical takeoff for receptacles, switches, fixtures, and panels
- Plumbing takeoff for fixtures, water lines, drain runs, and gas
- HVAC takeoff for ducts, diffusers, and equipment
- Insulation takeoff for batt, blown, and rigid by R-value
- Landscaping takeoff for mulch beds, sod, hardscape, and plantings
- Fencing takeoff for posts, panels, and gates
- General contractor takeoff for verifying sub bids across the entire scope
Paper, scale ruler, calculator still work. Plenty of contractors built profitable businesses that way. The math on time tells a different story now: a drywall takeoff on a 20-unit apartment building runs 6 to 10 hours by hand and 2 to 4 hours with digital measurement software. Across 80 bids a year that is roughly six additional bids of estimator capacity. Our walkthrough on how to measure a PDF covers the digital workflow step by step with screenshots if you have not done it before.
The principle is the same regardless of method: measure carefully, organize by trade and assembly, document your assumptions, move on to pricing.
Step 3: Price the Materials
You have quantities. Now you need current prices.
Material costs are not what they were last quarter. Lumber, steel, copper, gypsum, asphalt, concrete, every commodity in construction moves with markets, weather, tariffs, and supply chains. The price you used on a job you bid two months ago is not the price you should use today.
Get fresh quotes for every major material category on every bid. Not "fresh" as in "I think we ran a quote in February." Fresh as in "I emailed the supplier this morning and the price is good for 30 days in writing."
The quote needs three things: the unit price, the quantity it applies to, and the duration the price holds. A supplier who tells you concrete is $165 a yard but cannot tell you whether that price holds for 60 days while you wait for the bid to be awarded is giving you a number, not a quote. Push for a written commitment with an expiration date. If material prices spike between bid submission and award, your firm price contract becomes a loss leader.
For materials you buy from multiple sources, get at least two quotes and use the lower one in the estimate. Track the spread. On commodity items the price difference between suppliers can be 5 to 15%, and the supplier you use for one project might not be the cheapest on the next. Locking in vendor relationships matters, but locking in pricing matters more.
Apply waste factors after you get the quote, not before. Quotes are for net quantities at unit prices. Your takeoff should give you the net quantity required to build the job. The waste factor is what you add to the order so that the crew has enough material when cuts, breakage, and field adjustments happen. Waste factors vary by material and complexity.
Material Waste Factors at a Glance
Ready-mix on clean, level subgrade with tight forms.
Direct-pour against soil absorbs concrete into trench walls.
Higher for complex layouts with angles, soffits, and many small rooms.
Higher for cut-heavy projects with lots of openings.
Standard layout. Diagonal patterns push to 20%.
Square rooms at 10%. Irregular layouts at 15 to 20%.
Based on hip and valley count. More cuts equals more waste.
Every trade page on our site lists the standard waste factors for that scope, with notes on when to use the high or low end of the range.
For long-duration projects, ask about price escalation clauses. An escalation clause in the contract allows the price to adjust if a specified material moves outside a defined range during the project. The standard structure is a threshold clause: prices hold unless a specific commodity index (steel, lumber, copper) moves more than a stated percentage from the bid date, at which point the contract price adjusts by the change above the threshold. This is not the contractor wanting more money. This is the contractor sharing the price-spike risk with the owner instead of betting the whole profit margin on prices staying flat.
Step 4: Calculate Real Labor Cost (The Burden Trap)
Labor is 40 to 60% of a construction project total cost. Get this number wrong and nothing else matters.
The single most expensive mistake new estimators make is using base hourly wage as the labor cost. A carpenter you pay $35 an hour does not cost your business $35 an hour. Burden is everything you pay on top of the base wage to keep that worker employed: payroll taxes, insurance, benefits, training, tools.
Labor Burden Breakdown
Varies wildly by trade and modifier. Roofers and ironworkers exceed 25%; painters and electricians sit at 5–8%.
If offered. Single coverage at the low end, family coverage at the high end.
Federal, required by law. 6.2% Social Security + 1.45% Medicare.
Varies by state and your experience rating. New employers start higher.
Vacation, sick, holidays. Counted as cost because you pay non-productive hours.
On the first $7,000 per employee. Most contractors land near 0.6% after state credit.
If offered. Common match is 3% to 4% of base wage.
Insurance allocated per labor hour. Higher for trades with property-damage exposure.
Per-worker allocation for ladders, hand tools, PPE, and consumables.
OSHA, trade certifications, license renewals, continuing education.
Total burden range: 24–33% non-union open shop. 60–70% union shop with full benefits. A carpenter at $35 base wage costs $43.40 to $59.50 fully loaded depending on benefits and union status.
Workers compensation is where the math gets brutal. Roofers and ironworkers carry rates that exceed 25% of payroll because falls and metal injuries are common and severe. Painters and electricians sit closer to 5 to 8%. If you employ multiple trades and use a single blended burden rate, you are overcharging the safer trades and undercharging the dangerous ones. Track burden by trade.
Two formulas do all the work:
Fully Burdened Hourly Cost = Base Hourly Wage × (1 + Burden Rate)
Task Labor Cost = Hours × Burdened Hourly Cost × Crew Size
A finish carpenter at $32 base with 30% burden costs $32 × 1.30 = $41.60 per hour. Production rates come from your own historical data, published references like RSMeans or NAHB, or trade-specific guides. Two-person crew installing 5/8-inch drywall on metal studs runs 60 to 80 square feet per hour. One-person ceramic tile crew in a residential bath runs 30 to 50 square feet per day. Track your own crews over time. Your numbers are always more accurate than a published average.
The most common labor estimating mistake is using base wage instead of burdened cost. On a $200,000 labor budget, the difference between a 30% burden rate and 0% burden rate is $60,000. That gap is bigger than the entire profit margin on most jobs. If your bid uses base wage, you are pricing every job to lose money before the first day of work.
Step 5: Add Equipment, Subs, and Other Direct Costs
Materials and labor are the biggest line items. They are not the only ones.
Equipment. Owned equipment carries an internal hourly rate covering depreciation, fuel, repairs, and a portion of the loan. A skid steer that cost $52,000 with $15,000 in interest, $4,000 a year in maintenance, and a five-year useful life carries an internal rate of $25 to $40 per hour. Rental rates need delivery, fuel, and any operator labor on top. A daily 26-foot scissor lift runs $200 to $350; weekly rentals drop the per-day rate 30 to 40%, so match the rental term to job duration.
Subcontractors. Do not just plug in the sub's number and add markup. The plumbing sub quotes $48,000 based on a scope summary, then on bid day clarifies to $52,000 because their original price excluded gas line trenching. If you carried the $48,000, the $4,000 difference comes out of your margin. Read every sub quote line by line for inclusions and exclusions.
Markup on subs runs lower than self-performed work: 5 to 10% on subs vs. 15 to 25% on direct work, because subs are pre-priced and your role is coordination, not production. Some general contractors carry 10 to 15% as a scope-creep buffer. Long-time sub partners might run as low as 5%.
Permits and fees run 0.5 to 2% of project value on residential, 1 to 3% on commercial. Pull actual numbers from the local jurisdiction fee schedule and line-item them in the bid.
Job site logistics (dumpster, porta-potties, temp fencing, temp power, jobsite trailer) total $400 to $800 a month on a small residential remodel and $2,000 to $5,000 a month on commercial. Multiply by project duration.
Bond costs. Bid bonds are usually free for contractors with established surety relationships. Performance and payment bonds cost 0.5 to 4% of contract value, typically 1 to 3% with strong financials. On a $1 million project that is $10,000 to $30,000. Below-average credit pushes the rate to 3 to 5%. Bonds are direct project expenses, not overhead.
Step 6: Calculate Overhead (And Stop Burying It)
Overhead is every cost of running your business that is not directly tied to a specific job. Office rent, office staff, owner salary, general liability insurance, phone, internet, software, marketing, bookkeeping, truck repairs, licenses, CPA fees, legal retainers. The lights that are on whether you have one job or ten.
Most contractors bury overhead in their markup. They charge 25 or 30% on top of direct costs, call it overhead and profit, and never check whether that number actually covers their real overhead at the volume they are running. Most of the time, it does not.
Calculate it explicitly instead. Add up every business cost that is not direct project labor, materials, equipment, or subs. That total is your annual overhead. Divide by annual revenue to get your overhead percentage. For most small-to-midsize contractors that lands between 8 and 15%. A remodeling company with $1.2M revenue and $144,000 in overhead operates at 12%. Every job they price needs to recover 12% of project cost just to cover the office, vehicles, insurance, and owner salary, before any profit at all.
For trades where labor drives cost, an alternative is overhead per labor hour: $300,000 annual overhead ÷ 24,000 billed hours = $12.50 per hour added to the burdened wage. Either method works. What does not work is the "10 and 10" default everyone borrows. A high-volume residential contractor may operate at 8%. A small specialty shop may run 18%. Your number should match your actual cost structure, not the rule of thumb.
If you have not calculated your actual overhead in the last 12 months, do it before you submit your next bid. The number is almost always higher than contractors expect. The first-time exercise frequently reveals years of pricing jobs to lose money and making it up on volume, which is the worst business model in construction.
Step 7: Set Profit (And Don't Confuse Markup With Margin)
Profit is the money your business keeps after every cost is paid. It is the reason you take on the risk of running a contracting business instead of working for someone else.
It is also the single most miscalculated number in construction bidding, because the entire industry conflates two different concepts.
Markup is the percentage you add to your cost to get the price.
Margin is the percentage of the price that is profit.
These are not the same number.
If your direct cost is $10,000 and you add 25% markup, the price is $12,500. Your profit is $2,500. Your margin is $2,500 / $12,500 = 20%. A 25% markup produced a 20% margin.
If your direct cost is $10,000 and you want a 25% margin, the price needs to be higher. Profit divided by price equals 25%, so price minus cost equals 25% of price, which means cost equals 75% of price. $10,000 / 0.75 = $13,333. The markup needed to achieve 25% margin is 33.3%, not 25%.
The conversion formulas:
Margin from Markup: Margin = Markup / (1 + Markup)
Markup from Margin: Markup = Margin / (1 - Margin)
A 50% markup produces a 33.3% margin. A 100% markup produces a 50% margin. A 33% markup produces a 25% margin.
Why this matters in real money: a contractor who thinks they are running 30% margin but actually applies 30% markup is generating 23% margin. On $1 million in revenue, the difference is $70,000 in profit. That is the difference between paying yourself a year-end bonus and going to the bank for an operating line.
Industry standard profit margins by project type:
Residential New Construction
Predictable cost structure on smaller scale. Highest historical net margin in the industry.
Residential Remodels
Higher margins make up for hidden conditions, scope changes, and the smaller crews.
Commercial New Construction
Tighter margins from competitive bidding, higher overhead, and longer project durations.
Commercial Tenant Improvements
Hidden conditions in existing buildings push margins higher than ground-up commercial.
Specialty Trades
Electrical, mechanical, and other licensed trades carry higher margins than general scope.
Public Works
Lowest margin work in construction. Hard competitive bidding and certified payroll cut into profit.
The gross margin range is what most contractors target on the bid itself. The net margin range is what actually shows up on the year end financial statement after overhead, bad debt, change order disputes, and unbilled work. The gap between the two is where the business either thrives or quietly starves.
Markup and margin are not the same. A 25% markup on cost produces a 20% margin on price. A 50% markup produces a 33% margin. A 100% markup produces a 50% margin. The conversion formula: margin = markup / (1 + markup). If you target margins but apply markups, you are short of your goal on every job. If you target markups, set them with the conversion in mind.
Step 8: Add Contingency
Construction projects rarely go exactly as planned. Contingency is the budget line that absorbs the small surprises so they do not become arguments over change orders. The percentage scales with how many unknowns you have:
- New construction, complete plans, known site: 5 to 7%. Work is engineered, conditions verified, unknowns limited.
- Residential remodels: 7 to 10%. Existing conditions, surprises that only show up during demo.
- Commercial tenant improvements: 8 to 12%. Hidden mechanical, electrical, and structural conditions, as-builts that do not match what is actually in the walls.
- Renovation of older buildings: 10 to 15% standard, 15 to 20% on buildings over 50 years old where lead paint, asbestos, undocumented modifications, and code compliance gaps are likely.
- Public works: sometimes capped or specified by the owner. Read the bid documents to see who holds the contingency.
Contingency is not profit. It is a separate line item the contractor draws against during the project for legitimate overruns within the original scope. On cost-plus contracts, unused contingency returns to the owner. On lump sum contracts, the contractor keeps it. That is one of the reasons lump sum bids carry higher contingency.
The mistake most contractors make is skipping contingency entirely on competitive lump sum bids in order to win. That math works only if nothing goes wrong. Across an entire portfolio of projects, the average construction cost overrun is 28%, and 85% of construction projects experience some cost overrun. Bidding without contingency is bidding on the assumption you are in the 15% that go perfectly. That is not a strategy.
Step 9: Choose Your Bid Type
Different contracts allocate risk differently. Choosing the right bid type is part of the bid itself.
Lump Sum
Fixed Price
Carries all cost risk
Scope is fully defined, drawings are complete, and site conditions are known.
Cost Plus
Cost Reimbursable
Carries all cost risk
Scope is uncertain or the project starts before drawings are complete.
GMP
Guaranteed Maximum Price
Cost-plus with a ceiling
Large or complex projects with partial scope uncertainty. Common on design-build.
Unit Price
Quantity-Based
Quantities flex, unit cost fixed
Final quantities unknown but unit cost predictable. Earthwork, paving, utilities.
Time and Materials
T&M
Carries all cost risk
Emergency work, small change orders, or fully undefined scope.
Two notes the cards do not capture. GMP savings are typically split when the project finishes under the ceiling, often 50/50 or 70/30 in the owner's favor. Read the contract before assuming you keep them. T&M is administratively heavy because every hour and every material purchase has to be documented and submitted for approval; the flexibility comes with paperwork.
Most public projects require lump sum bids on a fixed bid form. You either accept the form or you do not bid. On private negotiated work you have flexibility, and proposing the right structure is part of how you win. An owner who is risk-averse and has limited construction experience will often accept a higher GMP price in exchange for the cost certainty a pure cost-plus contract does not provide.
Step 10: Submit a Real Bid Package
The bid form is one document. The bid package is everything you submit with it.
A complete bid package has three layers. Every bid needs the core documents. Bonded projects add two more. Public projects often require additional compliance forms.
Complete Bid Package Checklist
Required for Every Bid
- Bid form — Owner-supplied form with price, alternates, unit prices, signed and sealed.
- Schedule of values — Line-item breakdown showing how the lump sum splits across major scopes.
- Proposal letter — Cover letter summarizing the bid with inclusions, exclusions, and clarifications.
- Construction schedule — Major milestones and proposed completion date. Bar chart minimum.
- References — Three to five recent comparable projects with owner contacts.
- Insurance certificates — GL, auto, workers comp, umbrella, and any specialty coverage matching contract limits.
- Qualifications and exclusions — Specific list of what is included and what is not. Vague exclusions create disputes.
Required When the Project Is Bonded
- Bid bond — 5 to 10% of bid amount, guaranteeing you will execute the contract if awarded.
- Bonding letter — Letter from your surety stating bonding capacity and willingness to bond this project.
Required on Some Public Projects
Read the bid docs- Subcontractor list — Names of subs and dollar value of each scope. Prevents bid shopping after award.
- Certified payroll affidavit — Confirmation you will comply with prevailing wage requirements (Davis-Bacon, state).
- DBE/MBE/WBE participation form — Documentation of disadvantaged or minority business enterprise utilization.
Submission rule: Late bids are rejected. On public works, a bid received one minute after the stated submission time is non-responsive and cannot be opened. Hand-delivered bids should arrive 30 to 60 minutes early.
Two items deserve extra attention. Qualifications and exclusions is your chance to define the scope on your own terms. Vague exclusions create disputes; specific exclusions prevent them. "Bid excludes hazardous material abatement, including but not limited to lead paint, asbestos, and contaminated soil" is enforceable. "Bid excludes hazmat" is not. Bid bonds are usually free for contractors with established surety relationships, though some carry an annual administration fee of $1,500 to $2,500 for the underlying bond capacity.
The Mistakes That Cost Real Money
The same mistakes show up year after year. A 70-year analysis of 16,000 projects across 20 countries found that 85% finished over budget, with an average overrun of 28%. A 2018 PlanGrid and FMI study separately estimated US contractors lose $177 billion in labor every year to non-optimal activities like rework and fixing mistakes. Those numbers are the wreckage of estimating decisions that looked fine in the bid package and fell apart in the field.
The 8 Bidding Mistakes That Cost Real Money
Confusing Markup With Margin
A 25% markup produces a 20% margin, not 25%. Contractors who target margins but apply markups are short of their goal on every job. On a $1M revenue contractor running 30% markup thinking it is 30% margin, the gap is $70,000 in projected profit that never materializes.
Convert before pricing. Margin = markup / (1 + markup). To hit a 25% margin target, apply a 33.3% markup, not 25%.
Using Base Wage Instead of Burdened Cost
A carpenter at $35 base wage costs your business $43 to $55 fully loaded depending on benefits. If you bid the job at $35 per hour, your projected labor cost is short by $8 to $20 per hour times every labor hour on the project. On a 1,000-hour scope, that is $8,000 to $20,000 missing from your bid.
Always price labor at the fully burdened rate. Track your burden percentage by trade, not as a single blended number.
Forgetting Items on the Takeoff
Plans have layers. Reflected ceiling plans show ceilings the architectural floor plan does not. The most commonly missed items on residential takeoffs are closet interiors, soffits, and ceiling area in stairwells. On commercial work, the misses are partition schedule items: fire-rated walls priced as standard, double-layer assemblies priced as single.
Cross-reference every plan view against the schedule sheets. Use a checklist for each trade and verify nothing is missing before pricing.
Bidding to Win Instead of Bidding to Profit
In slow markets, contractors cut margin to win the job, then learn the discounted bid was the actual cost of the work with nothing left for profit. This is volume without profitability, the first sign of a business in trouble.
Set a minimum margin floor and walk away below it. If you have to drop margin below 8% to win work, the work is not your work.
Letting Bid Shopping Pressure Cut Your Subs
Bid shopping is when a general contractor uses one sub bid to negotiate a lower price from another sub after the bid is submitted. Subs who get bid-shopped routinely either stop bidding to that GC or pad their numbers in advance. Both responses hurt the GC.
If you are the GC, do not bid shop. If you are the sub, ask the GC their policy before you spend the time to put together a bid.
Not Including Supervision Costs
A working foreman who runs a crew and also installs work is partially supervisory. Most foremen spend 30 to 50% of their time on supervision (planning, coordinating, inspecting, dealing with material deliveries) rather than direct production. Bidding the foreman as 100% productive labor short-changes every project.
Track supervision separately as a labor line item, or allocate part of the foreman wage to overhead.
Skipping the Spec Book
The drawings tell you where things go. The specs tell you what to use. A wall priced as standard 1/2-inch board on a project that specs 5/8-inch Type X is mispriced by $1.50 to $3 per square foot. On a 5,000 square foot project, that is $7,500 to $15,000 missing from the bid.
Open the project manual every time. Read Division 09 finishes, Division 03 concrete, every division that touches your scope.
Not Tracking Your Hit Rate
Less than 6% of construction companies track their bid hit ratio. Without tracking by bid type, project size, and general contractor, you cannot tell which markets are profitable for your business and which are subsidizing other contractors with your unbillable estimating time.
Log every bid: type, size, GC, margin, win or loss. Review quarterly. Drop the work that does not convert.
What Happens After You Submit
The bid hits the table. Now the work that determines whether you win begins.
Bid leveling. The owner or their estimator normalizes every bid to the same scope, adjusting for alternates, exclusions, and qualifications. A low bid with extensive exclusions can level higher than a higher bid with broader inclusions. This is why specific qualifications in your proposal letter matter. They give you ground to defend your number after bids are opened.
Post-bid clarifications. The GC often calls the apparent low bidder. "You are at $487,000. The next bidder is at $612,000. Is your number good?" This is your chance to revisit before the contract is signed. Confirm only if you are confident in the takeoff. If something is off, find out now, not after.
Negotiation. On private work, negotiation is normal. Negotiate from your bid, not out of desperation to close. Walking away from a bad deal is a profitable habit.
Contract review. The bid is the offer. The contract is the legal agreement. Read every word. Pay attention to retainage, payment schedule, change order procedures, indemnification, insurance, and termination clauses. If terms differ materially from the bid documents, push back. If you do not understand a clause, ask your attorney. A one-hour legal review on a $500,000 contract is the cheapest insurance in construction.
Change order setup. The first day of work is too late to start thinking about change orders. Define what triggers them, who can authorize, how they are priced, and the approval timeline during contract negotiation. Change orders run 10 to 15% of contract value on major projects and drop productivity 10 to 30% on projects with heavy change activity. A defined process protects both parties from surprise.
Going Digital: The Hidden Cost of Manual Estimating
Everything in this guide can be done with paper, a scale ruler, a calculator, and a spreadsheet. Plenty of contractors built profitable businesses that way. The math on time tells a different story now.
A complete commercial bid takes 8 to 24 hours of estimator time. Takeoff alone is typically 4 to 12 hours. Manual runs at the high end; digital runs at the low end. Save 6 hours per bid across 80 bids a year and you free up 480 estimator hours. At $80 burdened, that is $38,400 in capacity back, or 60 additional bids you can run. At a 25% hit ratio, those 60 bids translate into 15 more contracts.
Easy Takeoffs is a browser-based takeoff tool built for the workflow in this guide. Upload a PDF plan set, set the scale with auto scale detection, and trace measurements directly on the drawings. Linear for pipe and trim. Polylines for continuous wall runs. Polygons for slabs, ceilings, and roof planes. Counts for receptacles, fixtures, and doors. Group everything by trade with measurement groups, apply built-in material templates, and export a clean list to CSV. Per-page scale calibration so the site plan at 1 inch equals 20 feet does not get confused with the floor plan at 1/4 inch equals 1 foot. Snap to vector geometry so wall corners and fixtures land where the architect drew them. Unlimited projects, no per-seat licensing.
If you are evaluating takeoff tools, our comparison of the best takeoff software for small contractors covers pricing, platforms, and honest reviews with real prices, not "contact sales" placeholders. For head-to-heads against specific competitors, see how we compare to Bluebeam, PlanSwift, STACK, and Procore. Beyond takeoff, the broader construction tech stack for small to midsize contractors covers communication, time tracking, accounting, and photo apps that round out the toolkit.
Frequently Asked Questions
What is the difference between a bid, an estimate, and a proposal in construction?
An estimate is your internal calculation of what a job will cost to build, including materials, labor, equipment, overhead, and profit. A proposal is the document you send the client describing the scope, price, schedule, and terms. A bid is a proposal submitted in response to a formal request, usually with multiple competitors quoting the same scope. The estimate is private and informs your number. The proposal and bid are external documents, with the bid being the more formal version typically used on public works and large commercial projects.
How do you calculate markup on a construction job?
Markup is the percentage you add to your cost to arrive at the price. The formula is markup = (price - cost) / cost. To apply a markup, multiply your cost by (1 + markup percentage). If your cost is $10,000 and you want 30% markup, the price is $10,000 × 1.30 = $13,000. Markup is different from margin: a 30% markup produces a 23% margin, not 30%. To convert: margin = markup / (1 + markup), and markup = margin / (1 - margin).
What is a fully burdened labor rate in construction?
The fully burdened labor rate is the total cost of an employee per hour, including base wage plus all employer-paid taxes, insurance, benefits, and overhead. For a non-union open shop in most states, burden runs 24 to 33% on top of base wage. Union shops with full benefit packages run 60 to 70% burden. A carpenter at $35 base wage with 30% burden costs $35 × 1.30 = $45.50 per worked hour. The burden includes FICA, FUTA, SUTA, workers compensation, general liability allocation, health insurance, retirement contributions, paid time off, training, and small tools.
What is the average profit margin for a construction company?
Industry profit margins vary significantly by project type. Residential new construction typically targets 18 to 25% gross margin and 5 to 10% net margin. Residential remodels target 25 to 35% gross margin and 8 to 12% net margin. Commercial new construction targets 10 to 20% gross margin and 3 to 7% net margin. Specialty trades often target 20 to 30% gross margin. The gross margin is what you set on the bid; the net margin is what shows up on year-end financials after overhead, bad debt, and unbilled work. Most well-run contractors aim for above 10% net margin to maintain a sustainable business.
How much should I add for contingency on a construction bid?
Standard contingency for new construction is 5 to 7%. Standard residential remodels run 7 to 10%. Commercial tenant improvements run 8 to 12%. Renovation of older buildings runs 10 to 15%, with 15 to 20% justified for buildings over 50 years old or work in historical structures. Contingency is a separate line item from profit and is meant to absorb small surprises within the original scope. Skipping contingency on competitive lump sum bids is a common cause of contractor losses, since 85% of construction projects experience some cost overrun with an average of 28%.
What is the difference between a fixed price contract and a cost-plus contract?
A fixed price (lump sum) contract commits the contractor to a single total price for the defined scope. The contractor takes all the cost risk and keeps any savings. A cost-plus contract reimburses the contractor for actual costs plus a fee, which can be a fixed percentage of cost or a fixed dollar amount. The owner takes most of the cost risk. Fixed price gives the owner cost certainty but the contractor higher margins to compensate for risk. Cost-plus gives the owner full transparency but no cost ceiling. A guaranteed maximum price (GMP) contract combines both: cost-plus reimbursement up to a stated ceiling, with savings often shared between owner and contractor.
How long does it take to bid a construction job?
A typical commercial bid takes 8 to 24 hours of estimator time depending on size and complexity. The breakdown is roughly 1 to 2 hours reading the plans and specs, 4 to 12 hours on takeoff, 2 to 4 hours getting material and subcontractor quotes, 1 to 2 hours assembling the estimate and applying markup, and 1 to 2 hours preparing the bid package. Smaller residential proposals can be done in 2 to 4 hours. Public works bids on complex projects may run 40 to 80 hours. Digital takeoff software typically saves 30 to 60% on the takeoff portion of the bid, which is the largest single time cost.
How much does a performance bond cost on a construction project?
Performance bond rates typically run 0.5 to 4% of the contract value. For contractors with strong financials and good credit, rates land at 1 to 3%. On a $1 million project, that is $10,000 to $30,000 as a one-time premium. Below-average credit pushes rates to 3 to 5%. Smaller projects under $1 million often carry a flat 3% rate while larger projects scale down to 1 to 2%. Bid bonds are usually free for contractors with established surety relationships, though some carry an annual administration fee of $1,500 to $2,500 for the underlying bonding capacity.
What is a good bid hit ratio in construction?
The construction industry average bid hit ratio is around 25%, meaning one win for every four bids submitted. The number varies significantly by bid type. Hard competitive bids on public projects typically run 10 to 20%. Negotiated work and selective bid lists run 30 to 50%. Less than 6% of contractors track their own bid hit ratio, which makes it hard to know whether your business is operating above or below industry averages. Tracking by bid type, project size, and general contractor relationship reveals which work is profitable to chase and which is subsidizing other contractors with your unbillable estimating time.
What is the most common mistake contractors make when bidding?
The most common and most expensive mistake is confusing markup with margin. A 25% markup produces a 20% margin, not 25%. Contractors who target margins but apply markups are short of their goal on every job. The second most common mistake is using base hourly wage instead of fully burdened labor cost, which understates labor by 24 to 33% on every project. The third is skipping contingency on competitive lump sum bids in order to win, which works only if no surprises occur, even though 85% of construction projects experience cost overruns averaging 28%.