Hidden Overhead Costs Contractors Miss: The 2026 Profit Killers
By BuildFolio Team · Last updated January 28, 2026
Most contractors track materials and labor but ignore the overhead costs that silently destroy their margins. Here are the hidden costs eating 10-20% of your profit.
TL;DR — Quick Answer
Contractors typically underestimate overhead by 15-25%. The biggest hidden costs: vehicle depreciation ($8K-$15K/yr), warranty callbacks (2-5% of revenue), unbilled drive time (10-15% of labor hours), and admin time on estimates that never close. Track every cost with job costing software to see your real margins.
The Overhead Gap: What You Think vs. Reality
Ask most contractors their overhead percentage and they will say 15-20%. The actual number is usually 30-45%. This gap is where profits disappear.
The problem is not that contractors are bad at math. The problem is that many overhead costs are invisible unless you track them deliberately.
| Hidden Cost Category | Annual Impact | % of Revenue |
|---|---|---|
| Vehicle depreciation & maintenance | $8,000-$15,000 per truck | 2-5% |
| Warranty callbacks | $5,000-$25,000 | 2-5% |
| Unbilled drive time | $10,000-$30,000 | 3-6% |
| Tool replacement & wear | $3,000-$8,000 | 1-2% |
| Unbillable admin time | $15,000-$40,000 | 3-8% |
| License/CE/insurance gaps | $5,000-$20,000 | 1-4% |
1. Vehicle Depreciation and Maintenance
Your truck loses $5,000-$10,000 in value every year, plus you are spending $3,000-$5,000 on maintenance, fuel, and insurance. Most contractors do not include vehicle costs in their per-job pricing.
For a fleet of 3 trucks, that is $24,000-$45,000 per year in vehicle costs that need to be recovered in your pricing.
How to Fix It
Calculate a per-mile or per-job vehicle charge. If your truck costs $12,000/year and you run 200 jobs, that is $60 per job in vehicle overhead alone.
2. Warranty Callback Labor
When you go back to fix something under warranty, you eat the labor cost. For most contractors, callbacks represent 2-5% of total revenue. On $500K in annual revenue, that is $10,000-$25,000 in unrecovered labor.
The Callback Trap
Contractors who do not track callbacks cannot identify problem employees, bad materials, or recurring issues. Without data, you cannot fix the pattern.
3. Unbilled Drive Time
Your crews spend 10-15% of their paid hours driving between jobs. That time is not billed to any customer but it is definitely on your payroll. For a crew earning $80/hour loaded cost, that is $8-$12 per hour of working time that goes unrecovered.
How to Fix It
Include travel time in your overhead calculation. If your crew spends 1 hour per day driving, build that cost into every job proportionally.
4. Tool Replacement and Wear
Power tools, hand tools, safety equipment, and consumables add up faster than most contractors realize. A cordless tool kit replacement cycle alone can cost $2,000-$4,000 per crew per year.
5. Unbillable Admin Time
The time you spend on estimates, follow-ups, scheduling, invoicing, and bookkeeping is real labor cost. If you spend 15 hours per week on admin tasks, that is $30,000-$50,000 per year in owner time that is not billed to any job.
BuildFolio Tip: Automate the Admin
BuildFolio’s AI Photo-to-Quote cuts estimate creation from 45 minutes to 3 minutes. Automated SMS follow-ups handle the chase. That is 10+ hours per week back in your schedule. $29/mo.
6. Licensing, CE, and Insurance Gaps
Continuing education, license renewals, bond premiums, and workers comp audits create costs that are easy to forget when pricing jobs. Workers comp alone can add 10-25% to your labor costs in high-risk trades like roofing.
How to Calculate Your True Overhead
- List every expense that is not direct materials or direct labor for a specific job
- Total annual overhead costs across all categories
- Divide by annual revenue to get your overhead percentage
- Add this percentage to every job estimate on top of materials and labor
- Track actual vs. estimated on every job to refine your numbers
The Profit Intelligence Approach
Instead of guessing overhead, use BuildFolio’s Profit Intelligence to track actual costs on every job in real-time. Most contractors who start tracking discover they are underpricing by 5-15%.
Are You Actually Profitable?
Most contractors think they know their margins. Our free Profit Score calculator shows the truth in 2 minutes.
Frequently Asked Questions
What percentage of revenue should contractors budget for overhead?
Most contractors should budget 25-45% of revenue for overhead depending on trade and company size. Roofing and HVAC tend to run higher (35-45%) due to insurance and equipment costs, while painting and landscaping run lower (20-30%).
What are the most commonly missed overhead costs?
The most commonly missed overhead costs include vehicle depreciation and maintenance, warranty callback labor, unbilled drive time between jobs, tool replacement and wear, continuing education and licensing fees, and office/admin time spent on unbillable tasks like estimates and follow-ups.
How do I track overhead costs effectively?
Use job costing software like BuildFolio ($29/mo) that tracks actual costs vs estimates on every job. Log material costs from supplier invoices, track labor hours per job, and allocate overhead proportionally. Real-time tracking beats the old method of only knowing your margins at tax time.