If you work as a 1099 contractor, you pay federal taxes by calculating them yourself and sending money directly to the IRS four times a year, then reconciling the total on your annual Form 1040. That’s the short answer to how 1099 employees pay federal taxes, and it splits into two obligations most new contractors don’t fully see coming: self-employment tax of 15.3 percent on your net earnings, and regular federal income tax on top of it. No employer is withholding anything for you, so the math and the timing are on you.
What You Actually Owe
Two federal taxes apply to the same pot of money: your net business profit.
The first is self-employment tax, which funds Social Security and Medicare. Employees split these contributions with their employer; you pay both halves. The combined rate is 15.3 percent — 12.4 percent for Social Security and 2.9 percent for Medicare.1Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax You owe it once your net earnings reach $400 for the year.2Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
The rate doesn’t apply to your full net profit. You first multiply net earnings by 92.35 percent, and the 15.3 percent rate applies to that reduced figure.3Internal Revenue Service. Topic No. 554, Self-Employment Tax The 12.4 percent Social Security portion only applies up to the annual wage base — $184,500 for 2026.4Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Earnings above that cap still owe the 2.9 percent Medicare portion. If your self-employment income exceeds $200,000 ($250,000 for married couples filing jointly), an additional 0.9 percent Medicare surtax applies to the amount above the threshold.1Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax
The second tax is regular federal income tax on that same net profit. It uses the graduated brackets that apply to all individual taxpayers. For 2026, rates run from 10 percent on the first $12,400 of taxable income for single filers up to 37 percent on income above $640,600.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Only the income within each bracket is taxed at that bracket’s rate.
Taxable income is not gross revenue. You start with revenue, subtract business expenses, then subtract adjustments (like half your self-employment tax) and either the standard deduction or itemized deductions. For 2026 the standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
Deductions That Cut the Bill
A few deductions exist specifically to soften the self-employed tax load. The three that move the needle most:
Half of your self-employment tax. You deduct 50 percent of the SE tax you calculated as an adjustment to income on Schedule 1. It comes off before the standard deduction and applies whether or not you itemize. It reduces income tax, not SE tax.
Qualified business income deduction. Under Section 199A, many self-employed workers can deduct up to 20 percent of qualified business income from taxable income.6Office of the Law Revision Counsel. 26 USC 199A – Qualified Business Income It’s available to sole proprietors, partnerships, and S-corporation shareholders. It phases out at higher incomes for workers in certain service fields such as law, accounting, consulting, health care, and financial services. It reduces income tax only, not SE tax.
Business expenses on Schedule C. These reduce net profit itself, so they cut both taxes at once. The biggest ones for most contractors:
- Vehicle costs, deducted as actual expenses or at the IRS standard mileage rate of 72.5 cents per mile for 2026, with a mileage log recording date, destination, and business purpose.7Internal Revenue Service. 2026 Standard Mileage Rates
- Business meals at 50 percent of the cost; entertainment is not deductible.8Internal Revenue Service. Topic No. 511, Business Travel Expenses
- Home office, if the space is used regularly and exclusively for business. The simplified method allows $5 per square foot up to 300 square feet.
- Health insurance premiums for yourself, your spouse, and dependents, deducted as an adjustment to income if you’re not eligible for coverage through a spouse’s employer. A child under 27 qualifies even if not your dependent.9Internal Revenue Service. Topic No. 502, Medical and Dental Expenses
- Supplies, software, and equipment; larger purchases may be depreciated, though Section 179 often lets you deduct the full cost in the purchase year.
- Professional services like accounting, tax prep, and legal fees tied to the business.
When Payments Are Due
Federal tax is pay-as-you-go, so 1099 workers send four estimated payments across the year rather than one lump sum at filing. For 2026:
- First quarter (income January through March): April 15, 2026
- Second quarter (April through May): June 15, 2026
- Third quarter (June through August): September 15, 2026
- Fourth quarter (September through December): January 15, 2027
If a due date falls on a weekend or legal holiday, the payment moves to the next business day. You can skip the January 15 payment if you file your 2026 return by February 1, 2027, and pay the full balance with the return.10Internal Revenue Service. Form 1040-ES – 2026 – Estimated Tax for Individuals
Safe Harbor: How to Avoid the Underpayment Penalty
Underpay across the year and the IRS charges an underpayment penalty at a rate that fluctuates quarterly, currently 7 percent per year as of early 2026.11Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026 The penalty can apply even if you get a refund when you file.
To avoid it, your total payments (plus any withholding from other income) need to hit one of two safe harbors:12Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax
- At least 90 percent of what you’ll owe for 2026, or
- At least 100 percent of the tax shown on your 2025 return. That threshold rises to 110 percent if your 2025 adjusted gross income exceeded $150,000 ($75,000 if married filing separately).
The prior-year safe harbor is the easier target when your income swings, because the number is fixed by last year’s return. And if you expect to owe less than $1,000 in total tax after withholding and credits, you generally don’t have to make estimated payments at all.10Internal Revenue Service. Form 1040-ES – 2026 – Estimated Tax for Individuals
How to Send the Payment
Four ways to pay, with different trade-offs on cost and setup.
IRS Direct Pay moves money from a checking or savings account for free. There’s no account to create; you enter your bank and personal information each time.13Internal Revenue Service. Direct Pay with Bank Account You get a confirmation number right away, and payments made by the due date count as timely even if the bank pulls the funds the next business day.14Internal Revenue Service. Direct Pay Help
EFTPS is the Treasury’s free system, useful if you want to schedule payments up to 365 days ahead or pull 15 months of history.15Internal Revenue Service. EFTPS: The Electronic Federal Tax Payment System Enrollment is required, and the IRS mails you a PIN, which takes five to seven business days.16Electronic Federal Tax Payment System (EFTPS). Welcome to EFTPS Online Sign up well before a deadline; you can’t pay until the PIN arrives. Payments must be scheduled by 8 p.m. Eastern the day before the due date.
Credit or debit card payments go through third-party processors and carry a fee. Credit card fees run about 1.75 to 1.85 percent of the payment (minimum $2.50); debit card fees are a flat charge of roughly $2.10 to $2.15 per transaction.17Internal Revenue Service. Pay Your Taxes by Debit or Credit Card or Digital Wallet The fees go to the processor, not the IRS. Worth it if rewards more than cover the cost; otherwise the free options win.
Check or money order works if you’d rather mail a paper payment with the 1040-ES voucher. Make it payable to “United States Treasury” and include your name, Social Security Number, daytime phone, and the tax year.18Internal Revenue Service. Pay by Check or Money Order Send it certified so you have a postmark record. No confirmation comes back, so watch your bank account for the check to clear.
Forms That Pull It Together
Three forms carry the calculation from start to finish.
Schedule C (Form 1040) reports your business income and expenses. Gross receipts go on line 1, expenses across the deduction categories, and line 31 gives you net profit or loss.19Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship)20Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040) That figure feeds both the SE tax and your income tax return.
Schedule SE takes the Schedule C net profit, multiplies by 92.35 percent, and applies the 15.3 percent rate.21Internal Revenue Service. About Schedule SE (Form 1040), Self-Employment Tax Half of the resulting tax moves to Schedule 1 as the adjustment that reduces your taxable income.
Form 1040-ES holds the worksheet for estimating what you’ll owe and dividing it into four payments.10Internal Revenue Service. Form 1040-ES – 2026 – Estimated Tax for Individuals Using last year’s Schedule C as a starting point keeps the estimate honest.
Keep the paperwork that supports all of this: 1099-NEC forms from clients, receipts, invoices, bank and card statements, your mileage log, and home office measurements. Note that beginning with tax year 2026, clients only have to issue a 1099-NEC when they’ve paid you $2,000 or more, up from the previous $600 threshold.22Internal Revenue Service. Form 1099 NEC and Independent Contractors You still owe tax on every dollar you earn, whether or not a 1099 arrives, so track your own income and don’t rely on the forms clients send. You’ll also need your Social Security Number or Employer Identification Number on every filing.23Internal Revenue Service. U.S. Taxpayer Identification Number Requirement
State Taxes Are Separate
Federal isn’t the whole obligation. Most states also tax self-employment income and run their own quarterly estimated-payment system, often on deadlines that mirror the federal ones. The income thresholds that trigger state payments vary, and a few states have no income tax at all. Check with your state tax agency early in the year so state payments land in the same quarterly plan as your federal ones.