Contractor Overhead Calculator — How to Price Jobs Using Your Real Costs

Ask a contractor what their overhead costs are. Nine out of ten will give you a blank stare or a rough guess that's off by thousands. Then they wonder why they're busy all year but the bank account never grows.

Overhead is the invisible cost that kills contractor profits. You can nail every estimate on labor and materials, but if you're not accounting for the $15,000-$30,000 per year it costs just to keep your business running, that money comes directly out of what you thought was profit.

This guide walks through exactly how to calculate your overhead, turn it into a usable number for pricing, and make sure every job carries its fair share of your business costs.

What Counts as Overhead?

Overhead is every expense you pay whether you're on a job or not. It's the cost of being in business, not the cost of doing a specific job. Materials and job-specific labor are direct costs. Everything else is overhead.

Here's the full list. Most contractors remember the obvious ones (insurance, truck) and forget the rest:

The Overhead Most Contractors Know About

Expense	Typical Annual Range
General liability insurance	$800–$2,500
Vehicle payment	$3,600–$7,200
Vehicle insurance	$1,200–$3,000
Gas / fuel	$2,400–$5,000
Workers comp (if applicable)	$1,000–$4,000

The Overhead Most Contractors Forget

Expense	Typical Annual Range
Tool replacement and repair	$1,000–$3,000
Phone and data plan	$1,000–$1,800
Software subscriptions	$300–$1,500
Licensing and renewal fees	$200–$800
Accounting / bookkeeping / CPA	$500–$2,500
Marketing (website, cards, ads, leads)	$500–$5,000
Consumable supplies (blades, bits, caulk, tape, PPE)	$500–$1,500
Vehicle maintenance and tires	$500–$2,000
Continuing education / certifications	$200–$1,000
Storage unit (if applicable)	$600–$1,800
Office supplies / printer / paper	$100–$400
Bank fees and payment processing	$200–$600

How to Calculate Your Overhead Rate

Once you have your total annual overhead, you need to turn it into a number you can use on every estimate. There are two common methods:

Method 1: Overhead as a Percentage of Revenue

Take your total annual overhead and divide it by your total annual revenue. That gives you your overhead percentage.

This method is simple and scales with job size — bigger jobs carry more overhead, which makes sense because they usually take more time and resources.

Method 2: Overhead per Billable Hour

Take your total annual overhead and divide it by your total billable hours per year.

This method ties overhead to time, which works well if your jobs vary widely in size. A 4-hour handyman call and a 200-hour kitchen remodel should carry different amounts of overhead, and the per-hour method handles that automatically.

Which Method Should You Use?

Either one works. The important thing is that you use one of them consistently. Most solo contractors find the percentage method easier to apply — you just add 12-18% to every estimate. Contractors who track labor hours closely may prefer the per-hour method for more precision.

The wrong method is no method at all. If overhead isn't a line in your estimate — even if the client never sees it — you're paying your business expenses out of what you think is profit.

Typical Overhead Ranges by Business Size

Business Type	Annual Overhead	Overhead %
Solo handyman (low overhead)	$12,000–$18,000	10–15%
Solo remodeling contractor	$18,000–$28,000	12–18%
Small crew (2-5 people)	$35,000–$65,000	15–25%
Established GC (5-15 people)	$60,000–$150,000	18–30%

If your overhead percentage is below 10%, you're probably forgetting expenses. If it's above 30%, your overhead might be bloated and worth reviewing for cuts. Most residential contractors land in the 12-20% range.

How Overhead Fits Into Your Pricing Formula

Your estimate should cover four things: direct costs, overhead, your salary, and profit. Here's how they stack:

1. Direct costs — Materials for the job (with markup) plus labor hours × hourly rate for you and any subs or employees.
2. Overhead allocation — Your overhead percentage applied to the direct costs, or your per-hour rate × labor hours.
3. Your salary — This should already be in your hourly rate. If you're paying yourself $35/hour, that's a direct cost, not profit.
4. Profit margin — 15-25% on top of everything above. Profit is what the business keeps after paying for everything, including you.

Let's walk through a real example. Say you're doing a bathroom faucet replacement and vanity install:

Line Item	Amount
Labor: 5 hours × $85/hr	$425.00
Materials: Vanity, faucet, supplies (with markup)	$680.00
Subtotal (direct costs)	$1,105.00
Overhead: 15%	$165.75
Total costs	$1,270.75
Profit margin: 20% (÷ 0.80)	$317.69
Sell price	$1,588.44

Rounded to $1,590. Without overhead and proper profit margin, a lot of contractors would quote this at $1,200 and think they're making $115 in profit. In reality, they'd be losing money once overhead is factored in.

The Overhead Expenses Contractors Miss Most Often

Based on common patterns, here are the expenses that get left out of overhead calculations most often:

1. Vehicle depreciation. Even if your truck is paid off, it's losing value and will need to be replaced eventually. Budget $2,000-$5,000/year for this.
2. Tool replacement. Tools break, wear out, and get stolen. If you're not budgeting for replacement, you're eating the cost when it happens.
3. Non-billable time. The hours you spend estimating, driving, shopping for materials, doing paperwork, following up with clients, and handling accounting. This is real time you can't bill for, and it needs to be covered somewhere.
4. Payment processing fees. If you accept credit cards (and you should), the 2.5-3.5% processing fee is a business cost that adds up. On $200,000 in card payments, that's $5,000-$7,000 in fees.
5. Bad debt. Clients who don't pay. It happens. Budget 1-2% of revenue for uncollectable invoices.
6. Warranty callbacks. Going back to fix something on a completed job. It's unpaid labor and materials that your pricing needs to account for.

Using a Rate Calculator to Handle This Automatically

If the math in this article feels like a lot, that's because it is. Calculating overhead, figuring out your hourly rate, applying margins correctly — it's the business side of contracting that nobody teaches you and everybody gets wrong.

A rate calculator does all of this for you. You input your annual overhead expenses, your target income, and your estimated billable hours. It outputs your hourly rate — the single number that, when applied to your labor hours, covers everything: your salary, your overhead, and your profit margin.

Once you have that rate, estimating becomes simple. Hours × rate = labor cost. Add materials with markup. The overhead and profit are already baked into the hourly rate. No separate overhead line item, no profit margin calculation, no confusing markup-vs-margin math. (Here's how to calculate your contractor rate →)

The Bottom Line

Overhead is the cost of being in business. It doesn't go away because you ignore it — it just comes out of your profit instead. The contractors who know their overhead number and build it into every estimate are the ones who actually make money at the end of the year. The ones who don't are working for less than they think.

Do the exercise. Add up your real expenses. Calculate your overhead percentage or per-hour rate. Then look at your last five estimates and ask yourself: did any of those jobs actually cover my overhead? If the answer is no, you know what to fix on your next estimate.