YOUR BID IS BUILT ON ASSUMPTIONS THAT DON'T MATCH YOUR FIELD.
Most subcontractor bids are built on three assumptions that are wrong: production rates from memory or trade references that don't reflect your actual crew performance, burden rates based on wages instead of fully-loaded labor cost, and overhead percentages that haven't been recalculated in years. When the estimate is built on wrong inputs, the bid price is wrong before the first shovel hits the ground — and no amount of field execution fixes a job that was underbid at the start.
This is where margin leakage starts — before the job is awarded. The fix isn't to bid higher across the board. It's to build estimates from actual field data: your crew's real production rates by work type, your actual fully-burdened labor cost, and an overhead rate calculated from real expenses. When those three inputs are accurate, the bid reflects what the job will actually cost.
WHERE BID ASSUMPTIONS DIVERGE FROM FIELD REALITY.
PRODUCTION RATES BUILT ON AVERAGES, NOT YOUR CREW'S ACTUAL PERFORMANCE
Every trade has published production rates — from RS Means, NECA manuals, trade associations. Those rates represent industry averages across thousands of projects and contractor types. Your crew's actual production rate on your specific work types in your markets may be 15% better or 20% worse than the average. When you bid using published rates and your field runs at a different number, every estimate has a structural error built in from line one. The fix is to extract actual production rates from your own job cost history — hours spent per unit installed by work type, by season, by crew composition. That's your real production rate. That's what the estimate should use.
BURDEN RATES BUILT ON WAGES, NOT FULLY-LOADED COST
An estimator who prices labor at $28/hour because that's the crew's wage rate is underestimating labor cost by 35% to 55%. The fully-burdened rate — wage plus payroll taxes (7.65% FICA), workers' comp (varies by trade, typically 8–25% of wages), general liability allocation, health insurance, 401k, and any other employer costs — commonly runs $42 to $60 for a $28/hour field employee. A $500,000 labor estimate built on wage rates instead of fully-burdened rates can be understated by $175,000 to $275,000. That's not a performance problem. That's an estimating input problem. The correction: calculate actual fully-burdened rates annually for each labor category and use those as the estimating input, not the paycheck number.
OVERHEAD PERCENTAGE UNCHANGED FOR 3 TO 5 YEARS
Most subcontractors apply a fixed overhead percentage that was set when the business was smaller, the team was leaner, or costs were lower. Overhead grows as the business grows — more supervision, more software, more insurance, more office space. If the overhead rate was set at 10% two years ago and the business has added a superintendent, a project coordinator, and a fleet of trucks since then, the real overhead rate might be 16% — but the estimates still show 10%. Every bid is underpriced by 6 points of overhead. On a $2M annual bid volume, that's $120,000 in overhead not being recovered. It shows up as a mysterious profitability shortfall that has nothing to do with field performance.
BUILDING ESTIMATES FROM ACTUAL FIELD DATA.
The alignment check: Pull your last 5 closed jobs. For each one: what production rate did the estimate assume vs what the field actually ran? What burden rate was used vs what labor actually cost fully loaded? What overhead rate was applied vs what the business actually ran? If those pairs don't match within 10%, your estimates are systematically off — and you can measure exactly how much by how much.
WHAT SYSTEMATIC ESTIMATING ERRORS COST ANNUALLY.
Wrong Burden Rate = Invisible Labor Shortfall
A $3M subcontractor with 40% labor content ($1.2M) using wage rates instead of burdened rates is understating labor cost by $420K–$660K annually. That's not margin fade — that's a fundamental pricing error on every bid.
Stale Production Rates = Structural Losses
A production rate 15% optimistic from published averages means every job estimate is 15% short on labor hours. On a $500K labor estimate, that's $75K in unbudgeted hours. Win 4 jobs like that and it's $300K in margin gone before the first crew mobilizes.
Stale Overhead Rate = Unrecovered Fixed Cost
A 6-point overhead rate shortfall on $4M in annual revenue is $240K in fixed cost not recovered through bids. The business covers it through net profit — which means there's $240K less profit than the P&L suggests, every year, until the rate is corrected.
FREQUENTLY ASKED.
Former PM and master electrician. Has seen bids built on published production rates lose margin on every single job — not because the field underperformed, but because the estimate never matched the crew's actual capabilities. The fix starts with knowing your real numbers.