Taxes for Contractors: The 2026 Guide for Self-Employed Trades Owners

Self-employed contractors pay federal income tax plus 15.3% self-employment tax on most of their net profit, usually through quarterly estimated payments. State income tax, sales and use tax, and payroll taxes for any employees come on top. Deductions for vehicles, equipment and job costs lower the profit those taxes apply to.

Taxes catch more trades owners off guard than any other bill. There's no employer withholding anything, so the money sits in your account looking like yours until April shows up. This guide explains what you owe and why, how much to set aside, when to pay, which deductions matter most in the trades, and what changes when you hire. Each rule links to the IRS source, and each topic links to a deeper page.

1. What taxes does a self-employed contractor pay?

A self-employed contractor typically pays four kinds of tax: federal income tax, self-employment tax (Social Security and Medicare), state and sometimes local income tax, and sales or use tax on materials depending on the state. Hire employees and you add payroll taxes. Each has its own rules and deadlines.

2. How does self-employment tax work?

Self-employment tax is the Social Security and Medicare tax for people who work for themselves. Per IRS Topic 554, it's 15.3% in total: 12.4% for Social Security and 2.9% for Medicare, figured on 92.35% of your net self-employment earnings. It generally applies once net earnings reach $400.

SE tax = (Net profit × 0.9235) × 0.124 [up to the wage base] + (Net profit × 0.9235) × 0.029

Run your own numbers with the self-employment tax calculator. SE tax surprises new owners because it applies even when income tax is low; it's on top of income tax, not instead of it.

3. How much federal tax will you owe in total?

Your total federal tax is income tax on your taxable income plus self-employment tax. Taxable income is profit minus half your SE tax, the standard deduction ($16,100 single, $32,200 married filing jointly for 2026) and, for many owners, the qualified business income (QBI) deduction of up to 20%.

The QBI deduction has limits. Above $201,750 of taxable income (single) or $403,500 (married filing jointly) in 2026, wage and property limits phase in; our calculator leaves it out above those levels to stay conservative. See QBI deduction. The quarterly estimated tax calculator runs this whole example with your numbers.

4. How much should you set aside for taxes?

Set aside a fixed percentage of every customer payment in a separate savings account. Many owners use 25% to 30% of profit as a starting point and adjust once their CPA projects the year. The right share depends on your profit, filing status, state and deductions, so check it against a real estimate.

1. 1

   Open a tax savings account

   A separate account at your bank, so tax money is never mistaken for operating cash.

2. 2

   Transfer on a schedule

   Move your percentage every week or every time a big payment lands. Small, frequent transfers beat a scramble.

3. 3

   Include state tax

   Add your state's rate on top of the federal share if your state has income tax.

4. 4

   Re-check each quarter

   Run the quarterly calculator with year-to-date numbers and adjust your percentage.

The how much to set aside for taxes guide walks through the percentage in more detail, and cash flow for contractors shows how tax savings fit into your cash plan.

5. When are quarterly estimated taxes due?

For tax year 2026, IRS Form 1040-ES lists estimated payments due April 15, 2026, June 15, 2026, Sept. 15, 2026, Jan. 15, 2027. You generally have to pay estimates if you expect to owe $1,000 or more after withholding and credits. Paying late or too little can bring an underpayment penalty.

To avoid an underpayment penalty, Form 1040-ES describes safe harbors: pay at least 90% of your 2026 tax, or 100% of the tax on your 2025 return (110% if your 2025 AGI was over $150,000). In our example, the owner's 2025 tax was $24,000, so the prior-year safe harbor is $24,000, or $6,000 a quarter, with about $4,462 still due when filing. Details are in quarterly estimated taxes for contractors.

6. Which deductions matter most for contractors?

The biggest deductions for most trades businesses are job costs (materials, subcontractors, field labor), vehicles, equipment and tools, insurance, and the everyday costs of running the shop. A deduction lowers the profit that both income tax and SE tax apply to, so good records save real money.

Trucks are the deduction where owners most often get tripped up. Mileage logs are required either way, and the heavy-vehicle rules differ from cars and light trucks. Read mileage deduction for contractors and Section 179 before you buy, and ask your CPA whether expensing it all this year is wise if you expect higher profit later.

7. Sole proprietor, LLC or S corp: how does structure change taxes?

A single-member LLC is taxed like a sole proprietorship by default: all profit flows to your return and is subject to SE tax. An S corporation election lets you pay yourself a reasonable salary through payroll and take the rest as distributions that aren't subject to SE tax, but it adds payroll, a separate return and costs.

The IRS requires S corp owner-employees to take reasonable compensation for the work they do before taking distributions; see the IRS page on S corporation compensation. Whether the savings beat the added cost depends on your profit. Read S corp vs. LLC for contractors and reasonable salary for an S corp.

8. What changes when you hire or use subcontractors?

When you hire W-2 employees, you withhold their income tax and share of FICA, pay the employer share (6.2% Social Security and 1.45% Medicare), pay federal unemployment tax (6.0% on the first $7,000 per employee, usually 0.6% after the state credit) and state unemployment tax. Subcontractors are paid gross and get a 1099-NEC.

• 1099-NEC threshold. For payments made in 2026, report payments of $2,000 or more to a non-employee, up from $600 (P.L. 119-21, per IRS Pub. 15 and the 1099 instructions). See 1099 for subcontractors.
• Collect a W-9 first. Get a W-9 before the first payment so you have the sub's taxpayer ID. See W-9 for subcontractors.
• Classify correctly. Calling a worker a 1099 sub doesn't make them one. The IRS looks at behavioral control, financial control and the relationship. See W-2 vs. 1099 and the 1099 vs. W-2 calculator.
• Budget the true cost of an employee. Payroll taxes, workers' comp and benefits add up. See labor burden and the payroll cost calculator.
• Insurance. Uninsured subs can end up on your workers' comp audit. See workers' compensation and certificate of insurance.

Payroll tax deposits and filings run on their own schedule (deposits, quarterly Form 941, annual Form 940 and W-2s). Most small shops use a payroll service. See payroll taxes and the hire and pay technicians guide.

9. Sales tax, use tax and state taxes

Sales tax for contractors depends on your state and on how the job is structured. In some states, a contractor installing materials into real property pays sales or use tax on the materials and doesn't charge the customer tax; in others, labor or certain services are taxable too. Check your state revenue department's contractor guidance.

Use tax applies when you buy materials without paying sales tax, for example out of state or online, and use them in your state. State income tax ranges from none to significant, and some cities add their own. Start with sales tax on labor vs. materials, use tax for contractors and your state guide, such as Texas, Florida, California, New York, Pennsylvania, Ohio, Georgia or North Carolina.

10. Tax issues by trade

Every trade pays the same federal taxes, but each has its own pressure points: big equipment purchases, travel to job sites, materials-heavy jobs that trigger sales tax questions, or seasonal income that makes quarterly payments lumpy.

Trade bookkeeping pages cover more: roofing, general contractors and landscaping.

11. Records that keep you audit-ready

Keep records that prove every number on your return: income by invoice, receipts for expenses, mileage logs, asset purchase documents, payroll records, W-9s and 1099s. Clean books also make your CPA's job faster and cheaper. The IRS generally expects you to keep records that support items on your return as long as they may matter.

• Use one business bank account and one business card.
• Snap and attach receipts to transactions as you go.
• Keep a contemporaneous mileage log (an app works).
• Store bills of sale for trucks and equipment with the date placed in service.
• Reconcile your books monthly. See the bookkeeping checklist for contractors.
• Set up QuickBooks properly from the start. See the QuickBooks setup guide.

Contractor tax calendar checklist

• April 15, 2026: Q1 2026 estimated payment; 2025 return due (or extension).
• June 15, 2026: Q2 estimated payment.
• Sept. 15, 2026: Q3 estimated payment.
• Jan. 15, 2027: Q4 estimated payment.
• Every pay period: payroll tax deposits if you have employees.
• Quarterly: payroll Form 941 and state payroll filings; state sales tax returns on your state's schedule.
• January: send 1099-NEC forms to subs paid above the threshold; W-2s to employees.
• Monthly: move tax savings, reconcile books, review profit vs. plan.
• Year end: review equipment purchases and entity choice with your CPA before Dec. 31.

Common contractor tax mistakes

• Forgetting SE tax. Owners who budget only for income tax come up short by thousands.
• Skipping quarterly payments. The bill doesn't shrink, and penalties can be added.
• Mixing personal and business money. It hides deductions and invites questions.
• Buying a truck in December just for the deduction. It saves a share of the price, not the whole price.
• Misclassifying workers. Back payroll taxes and penalties can dwarf the savings.
• Waiting until April to talk to a CPA. The planning moves happen before Dec. 31.