The majority of construction contractors who fail do so not because they can't build — they fail because they don't understand their numbers. Specifically, they don't know their overhead costs, and as a result they set markup percentages that don't cover their actual cost of doing business.
The result is a company that wins bids, stays busy, and still loses money. Understanding overhead and markup isn't accounting trivia — it's the foundation of a sustainable construction business.
What Overhead Actually Is
Overhead is the cost of running your business that isn't directly tied to producing a specific project. If direct costs are what you spend building a building, overhead is what you spend keeping the lights on so you can bid the next one.
Construction overhead falls into two categories:
Job overhead (general conditions): Costs that occur because of a specific project but can't be attributed to a specific scope of work. Project superintendent labor, project manager time, temporary trailer, portable restrooms, dumpsters, temporary fencing, safety equipment, final cleaning, progress photos. These are included in your project estimate as a line item.
General overhead (home office overhead): Costs that occur regardless of whether you have one project or ten. This is what most contractors undercount:
- Office rent or home office allocation
- Owner/principal salary and benefits
- Estimating and project management staff salaries
- Office utilities, phone, internet
- Software subscriptions (estimating, project management, accounting)
- Vehicle costs (owned or leased) for non-project vehicles
- Marketing and advertising
- Legal and accounting fees
- Training and education
- Business insurance (general liability, workers' comp on admin staff, umbrella)
- Bonding costs
- Banking fees and interest on credit lines
When GCs fail to account for home office overhead in their pricing, they're essentially donating those costs to every project owner they work for.
Calculating Your Overhead Rate
To know what markup you need, you first need to know your overhead rate — the percentage of revenue consumed by overhead costs.
Step 1: Add up all overhead costs for the year
Pull your income statement and categorize every line item. Direct job costs go in one bucket. Everything else is overhead. Include the owner's salary as an overhead cost — if you're working in the business, your compensation is a real cost that must be recovered through pricing.
A GC firm doing $2 million in annual revenue with common overhead structure might look like:
| Overhead Item | Annual Cost |
|---|---|
| Owner salary + benefits | $120,000 |
| Project manager (1) | $85,000 |
| Office admin (part-time) | $28,000 |
| Office rent | $18,000 |
| Vehicles (2 trucks) | $22,000 |
| Software (Procore, QuickBooks, estimating) | $8,400 |
| Marketing | $12,000 |
| Legal and accounting | $9,000 |
| Business insurance | $24,000 |
| Bonding | $14,000 |
| Miscellaneous admin | $8,000 |
| Total overhead | $348,400 |
Step 2: Calculate your overhead rate
Overhead Rate = Total Overhead ÷ Direct Job Costs
If your $2M company has $348,400 in overhead and direct costs (materials, labor, subs) average 75% of revenue = $1.5M:
Overhead Rate = $348,400 ÷ $1,500,000 = 23.2%
This means for every dollar of direct cost you incur, you need to collect an additional $0.232 just to break even on overhead — before any profit.
Setting Your Markup
Markup is applied to direct costs to recover overhead and generate profit:
Markup % = Overhead Rate + Desired Net Profit Margin
Using the example above, if you want a 10% net profit margin (on revenue, not cost):
First, convert the target profit margin from a percentage of revenue to a percentage of cost:
If revenue = cost × (1 + markup %), then for a 10% profit margin on revenue:
- Direct costs are 75% of revenue, overhead is ~17.4% of revenue, profit is 10%
- Total markup on direct costs needs to be approximately 37% to yield 10% net profit
Working the math directly:
- Direct costs: $1,500,000
- Overhead: $348,400 (23.2% of direct costs)
- Target profit (10% of revenue): $200,000
- Required revenue: $2,048,400
- Markup on direct costs: ($2,048,400 - $1,500,000) / $1,500,000 = 36.6%
Most GCs quote markup percentages in the range of 15–30% of direct costs. If your overhead rate is 20–25%, a 15% markup means you're operating at or below break-even on home office overhead before accounting for profit. That's why the industry's median net profit margin of 5–8% is not higher.
The Markup vs. Margin Confusion
One of the most consistent errors in construction pricing is confusing markup and margin.
Markup is applied to cost: a 20% markup on $100,000 of direct costs produces a $120,000 bid price.
Margin is expressed as a percentage of revenue: $20,000 profit on $120,000 revenue = 16.7% margin.
These are not the same number, and conflating them is expensive. If a GC says "I need a 20% margin on every job" and prices jobs with a 20% markup, they're actually running a 16.7% margin — and likely under-recovering overhead on every project.
| Markup on cost | Resulting gross margin | Net margin (after 20% overhead rate) |
|---|---|---|
| 15% | 13.0% | ~-7% (losing money) |
| 20% | 16.7% | ~-3.3% (barely losing money) |
| 25% | 20.0% | 0% (break-even) |
| 33% | 24.8% | ~5% (modest profit) |
| 43% | 30.1% | ~10% (healthy profit) |
The construction industry's well-documented thin margins are partly explained by contractors applying markup percentages that don't actually reflect their overhead structure.
How Overhead Rate Varies by Business Size
Overhead rates are not fixed — they vary with business size and type:
Small GC ($500K–$1.5M revenue): Overhead rates often run 30–45%. The owner does everything (estimating, project management, site supervision), but the business still has fixed costs in insurance, bonding, vehicle, and software that are high relative to revenue. These businesses must charge higher markups or the owner is effectively unpaid.
Mid-size GC ($2M–$8M revenue): Overhead rates typically 18–28%. The fixed cost base has grown, but revenue scale allows it to be spread more efficiently.
Larger GC ($10M+): Overhead rates often 12–20%. Larger revenue base spreads fixed overhead costs. However, larger projects require more sophisticated project management infrastructure, which adds its own costs.
The practical implication: a small GC competing on price against a large GC will lose unless the small GC's lower overhead (owner doing more of the work) or market niche (relationships, specialty knowledge) compensates.
What Happens When You Don't Charge Enough
The failure mode is predictable: a GC prices work at an insufficient markup, wins a full schedule of work, and then can't understand why there's no cash in the bank despite being "busy."
The answer is usually overhead under-recovery. Every project is running at break-even or slight loss on overhead, and there's no buffer for unexpected costs or downturns. Construction profit margins in 2026 average 5–8% net — industry data suggests most of the distribution is below that, with a small number of well-run firms pulling the average up.
The companies that consistently generate 10–15% net margins have three things in common: they know their overhead rate precisely, they price accordingly, and they're willing to pass on work that doesn't meet their margin threshold.
Practical Steps to Set Your Markup
Run your actual overhead costs using the prior year's income statement. Don't estimate — use real numbers.
Calculate your overhead rate as a percentage of direct costs (not revenue).
Add your target net profit margin expressed as a percentage of direct costs (use the conversion formula above).
Test your resulting bid price against the market. If you're consistently 30–40% above competitive bids, your overhead structure has a problem that markup alone can't solve.
Track actual vs. estimated overhead recovery quarterly. If your overhead costs are growing faster than your revenue, your markup needs to increase.
Separate overhead recovery from profit when analyzing jobs. A project that recovers overhead and breaks even on profit is not a good job — it's a marginally acceptable job that keeps your subs employed but doesn't build your business.
FAQ
What is a typical overhead rate for a construction company? Overhead rates (home office overhead as a percentage of direct costs) typically run 15–25% for mid-size GCs and 25–40% for small GC firms. Specialty contractors and subs often run lower overhead rates than GCs due to simpler organizational structures.
What markup should a general contractor charge? The correct markup depends entirely on your overhead rate and target profit margin. Most GCs need a markup of 25–45% on direct costs to cover overhead and generate a 5–15% net profit margin. GCs who apply 10–15% markup are typically under-recovering overhead on every project.
What's the difference between markup and margin in construction? Markup is added to cost; margin is expressed as a percentage of revenue. A 25% markup produces a 20% gross margin. They are not interchangeable numbers, and confusing them leads to systematic underpricing.
Should job overhead (general conditions) be included in the markup or as a direct cost? Job overhead (general conditions) should be itemized as a direct cost line in each project estimate. Home office overhead recovery should be built into your markup percentage. Separating them gives you better visibility into project profitability.
How often should a contractor recalculate their overhead rate? Annually at minimum — more frequently if business volume, staffing, or fixed costs change significantly. Your overhead rate from three years ago is likely wrong today.
Can subcontractors have different overhead rates than GCs? Yes, often lower. Subs typically have less administrative overhead (no estimating staff for competitive general bids, less insurance complexity, no bonding on every project). But specialty subs in tight labor markets with high equipment costs can have overhead rates comparable to GCs.
