Overhead expenses are the ongoing indirect costs of running a business — the rent, utilities, insurance, administrative payroll, and other spending that keeps operations going regardless of how many units you sell or clients you serve. Federal tax law lets you deduct most of these costs in the year you pay them, provided they’re ordinary and necessary for your trade or business and not capital expenditures that have to be written off over time. Getting the categorization right affects your tax bill, your pricing, and your exposure if the IRS reviews your return.
What Counts as Overhead
Overhead is any indirect cost that supports your business without being traceable to a single product, project, or billable hour. Monthly rent supports the whole company. An office manager’s salary benefits every department. These costs exist whether revenue is up or down.
The federal deduction standard sits in Section 162: you can deduct expenses that are “ordinary and necessary” for your trade or business.1Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses Ordinary means common and accepted in your industry. Necessary means helpful and appropriate for the business. The Supreme Court set out that framing in Welch v. Helvering, judging what counts as ordinary by the “conduct and forms of speech prevailing in the business world.”2Library of Congress. U.S. Reports: Welch v. Helvering, 290 U.S. 111 (1933)
One line trips up many owners: overhead is not the same as a capital expenditure. If you buy a building, make permanent improvements, or purchase equipment that will last for years, you generally cannot deduct the full cost in the year you spend it.3Office of the Law Revision Counsel. 26 USC 263 – Capital Expenditures Capital costs get spread across their useful life through depreciation or amortization. Your electric bill is fully deductible now. Mixing up the two is one of the fastest ways to create a problem on a return.
The Three Types
Fixed overhead stays the same regardless of activity. Commercial rent, annual insurance premiums, and salaried administrative staff all sit here. If you owe $3,000 a month for office space, that number doesn’t move whether you land ten new clients or zero. Fixed costs make budgeting easier and keep you on the hook during slow stretches.
Variable overhead moves with activity. Shipping, credit card processing fees, and sales commissions rise when you’re busy and fall when you aren’t. Watch these during growth periods, because they can quietly eat into the extra revenue that higher volume generates.
Semi-variable overhead has a fixed base plus a usage-driven component. A phone plan may charge a flat monthly rate with overage fees. Utilities often have a minimum service charge plus consumption. The base behaves like fixed overhead; the top layer scales with activity.
Common Overhead Costs
- Rent or mortgage payments for your business location.
- Insurance premiums, including general liability, professional liability, property, and workers’ compensation.
- Administrative salaries for office managers, receptionists, accountants, and other staff who don’t directly produce your product or deliver your service.
- Utilities: electricity, gas, water, internet, and phone service.
- Office supplies and software subscriptions.
- Payroll taxes, including the employer’s share of Social Security and Medicare, plus federal unemployment tax at 6.0% on the first $7,000 of each employee’s wages, before credits for state unemployment taxes paid.4Employment and Training Administration. FUTA Credit Reductions
- Licensing and registration fees, which vary by state and entity type.
- Legal, accounting, and consulting fees that support general operations rather than a specific project.
Depreciation and Section 179
When you buy equipment, furniture, or vehicles, the cost is spread across multiple years through depreciation. Most businesses use the Modified Accelerated Cost Recovery System (MACRS), which assigns each property type a recovery period. Computers and similar technology depreciate over five years, office furniture and fixtures over seven, and commercial buildings over 39.5Internal Revenue Service. Publication 946 – How to Depreciate Property MACRS front-loads the deductions, so you write off more in the early years.
Section 179 offers an alternative for smaller purchases. You can deduct the full cost of qualifying equipment in the year you buy it. For 2026, the maximum Section 179 deduction is $2,560,000, phasing out once total equipment purchases pass $4,090,000. It applies to tangible property used in active business operations, not to real estate.
Business Meals at 50%
Business meals count as overhead but only at half their cost. Federal law caps the deduction at 50% of the food and beverage expense, and the meal cannot be lavish or extravagant.6Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses The temporary 100% deduction for restaurant meals that applied in 2021 and 2022 has expired.
Startup Costs Are Treated Differently
Spending you do before the business begins active operations is not ordinary overhead. Market research, employee training before opening day, and travel to scout locations are startup costs. Once you open, the same categories of spending become deductible under Section 162.
You can deduct up to $5,000 of startup costs in the year the business launches. That $5,000 allowance phases out dollar-for-dollar once total startup spending exceeds $50,000. Anything left over gets amortized over 180 months, starting from the month the business opens.7Office of the Law Revision Counsel. 26 USC 195 – Start-Up Expenditures If you spent $8,000 getting the business off the ground, you’d deduct $5,000 in year one and spread the remaining $3,000 across the next 15 years.
Home Office Overhead
If you run a business from home, a portion of your household expenses qualifies as deductible overhead, but the space must be used exclusively and regularly for business. This deduction is available to self-employed individuals and independent contractors. It is not available to W-2 employees; the employee home office deduction was eliminated for tax years after 2017.8Internal Revenue Service. Simplified Option for Home Office Deduction
The IRS offers two methods. The simplified method allows $5 per square foot of dedicated business space, up to 300 square feet, capping the deduction at $1,500. The actual expense method requires more recordkeeping but often produces a larger deduction. You calculate the percentage of your home devoted to business use and apply it to qualifying expenses like mortgage interest, rent, insurance, utilities, and cleaning.9Internal Revenue Service. Publication 587 – Business Use of Your Home If your office occupies 15% of the total square footage, you deduct 15% of those shared expenses.
Calculating Your Overhead Rate
Total overhead is useful. The overhead rate is what actually drives pricing decisions, because it expresses indirect costs as a percentage of direct costs:
Overhead Rate = (Total Overhead Costs ÷ Total Direct Costs) × 100
If your business spends $120,000 a year on rent, utilities, insurance, and administrative salaries, and $300,000 on direct labor and materials, your overhead rate is 40%. Every dollar of direct cost carries an additional 40 cents of indirect cost. Quote a job on direct costs alone and you’re losing money before the invoice goes out.
Some businesses divide overhead by direct labor hours or machine hours instead of total direct costs. A law firm might divide total overhead by billable hours to find what each attorney needs to cover before the firm breaks even. A manufacturer might use machine hours if equipment costs dominate the overhead budget. The allocation base should reflect whatever activity most directly causes indirect costs to rise.
Watching the rate over time is where the insight comes from. A rate creeping up quarter after quarter means indirect costs are growing faster than productive output. That’s a signal to renegotiate leases, audit subscriptions, or examine whether administrative headcount has outpaced revenue.
Recordkeeping and Penalty Risk
Most overhead is fully deductible in the year paid, provided it meets the ordinary-and-necessary standard and isn’t a capital cost. IRS Publication 535 covers the specific categories.10Internal Revenue Service. Publication 535 – Business Expenses Accurate categorization is the whole game. Misclassifying a capital expenditure as a current deduction inflates your write-offs and understates your tax liability.
If the IRS finds negligence or a substantial understatement of income, accuracy-related penalties under Section 6662 apply at 20% of the underpayment.11Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments Fraud carries a separate penalty of 75% of the underpayment attributable to fraud.12Office of the Law Revision Counsel. 26 USC 6663 – Imposition of Fraud Penalty Sloppy work on the line between current expenses and capital costs is exactly the kind of error that draws attention.
The IRS expects documentation for every business expense: payee, amount, date, proof of payment, and a description showing the expense was business-related.13Internal Revenue Service. What Kind of Records Should I Keep Credit card statements, invoices, and receipts all count, and a single expense may need more than one document to substantiate.
The general retention rule is three years from the date you file the return. If you underreport income by more than 25% of gross income shown on the return, the window extends to six years. A fraudulent return has no time limit at all.14Internal Revenue Service. How Long Should I Keep Records For any significant overhead deduction, hold the documentation for at least six years. You won’t know in advance whether the IRS might question the income you reported.