If you get paid on a 1099, no one is withholding taxes from your checks, so paying your 1099 taxes means sending the IRS four estimated payments during the year and then settling up on your Form 1040 in April. You owe two things on that self-employment income: regular federal income tax and self-employment tax of 15.3% covering Social Security and Medicare. If you expect to owe $1,000 or more when you file, the IRS requires those quarterly payments rather than a single lump sum at year-end.1Internal Revenue Service. Estimated Taxes Miss them and you’ll owe penalties and interest that compound daily at 7% per year.2Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026
What You Actually Owe
An employee splits Social Security and Medicare with their employer: 7.65% each side, 15.3% combined.3Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates As a 1099 contractor you cover both halves yourself. That’s the self-employment tax, and you calculate it on Schedule SE when you file.4Internal Revenue Service. About Schedule SE (Form 1040), Self-Employment Tax It kicks in once your net self-employment earnings reach $400 for the year.5Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
The 15.3% doesn’t apply to your full net profit. It applies to 92.35% of it, a quirk that mirrors how employers don’t pay FICA on their own share.6Internal Revenue Service. Topic No. 554, Self-Employment Tax The 12.4% Social Security portion stops at an annual earnings cap ($184,500 for 2026).7Social Security Administration. Social Security Tax Limits on Your Earnings The 2.9% Medicare portion has no ceiling, and higher earners owe an additional 0.9% Medicare surtax on combined wages and self-employment income above $200,000 single or $250,000 joint.8Internal Revenue Service. Questions and Answers for the Additional Medicare Tax
On top of self-employment tax, you owe regular federal income tax on the same net profit, calculated using the 2026 brackets that start at 10% on the first $12,400 of taxable income for single filers and reach 37% above $640,600.9Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
Figuring Out How Much to Send Each Quarter
You have two ways to set your quarterly amount. The easier one is the safe harbor based on last year’s return. You avoid an underpayment penalty entirely if your total payments during the year hit either 90% of what you actually owe for this year or 100% of what you owed last year. If your adjusted gross income last year exceeded $150,000 (or $75,000 if married filing separately), that second figure jumps to 110%.10Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
The prior-year method is dead simple. Take the total tax from last year’s Form 1040, divide by four, send that each quarter. You’re protected from penalties even if your income doubles this year. It can mean overpaying if your income is dropping, in which case the current-year method may serve you better.
To estimate from scratch, project your gross 1099 income, subtract your expected business expenses, and use that net profit for two calculations. For self-employment tax: multiply net profit by 92.35%, then by 15.3% (respecting the Social Security cap). For income tax: start with net profit, subtract half of your self-employment tax, any self-employed health insurance premiums, the QBI deduction, and the standard deduction ($16,100 single or $32,200 joint for 2026), then apply the brackets.9Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill Add the two together and divide by four. Form 1040-ES has a worksheet that walks through this step by step.11Internal Revenue Service. About Form 1040-ES, Estimated Tax for Individuals
Rerun the numbers mid-year if your income is running well above or below what you projected. Overpaying ties up cash; underpaying invites penalties.
When Payments Are Due
The four due dates don’t fall at even intervals:
- Quarter 1 (income earned January through March): April 15
- Quarter 2 (April through May): June 15
- Quarter 3 (June through August): September 15
- Quarter 4 (September through December): January 15 of the following year
When a due date lands on a weekend or federal holiday, it shifts to the next business day.12Internal Revenue Service. When to Pay Estimated Tax – Individuals 2
How to Send the Payment
IRS Direct Pay is the fastest free option. You pay straight from a checking or savings account, get a confirmation number immediately, and don’t have to register. The IRS suggests checking your online tax account at least 48 hours after the scheduled withdrawal to confirm it cleared.13Internal Revenue Service. Direct Pay Help Each transaction is capped at $10 million.14Internal Revenue Service. Direct Pay With Bank Account
EFTPS (the Electronic Federal Tax Payment System) needs a one-time enrollment, and you have to schedule payments at least one business day ahead. In return you get a running history of every federal tax payment you’ve made, handy at filing time and useful if you’re ever audited.15Internal Revenue Service. EFTPS: The Electronic Federal Tax Payment System
Credit and debit card payments go through IRS-authorized processors that add their own fees. Credit card fees run about 1.75% to 1.85% of the payment; debit card fees are a flat $2.10 to $2.15 per transaction.16Internal Revenue Service. Pay Your Taxes by Debit or Credit Card or Digital Wallet Unless card rewards outweigh those fees, this is the pricier route.
You can also mail a check or money order with the paper voucher from Form 1040-ES, payable to the U.S. Treasury, to the address listed for your state in the 1040-ES instructions. Make sure the envelope is postmarked by the due date.
Deductions That Shrink What You Owe
Every legitimate business expense reduces both your income tax and your self-employment tax because both run off the same net profit figure. To qualify, an expense must be ordinary and necessary for your line of work.17eCFR. 26 CFR 1.162-1 – Business Expenses You list them on Schedule C.18Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss From Business (Sole Proprietorship) Software subscriptions, supplies, advertising, professional development, and business insurance are typical. Two others contractors regularly under-claim:
- Home office. If you use a defined space in your home exclusively and regularly for business, the simplified method lets you deduct $5 per square foot up to 300 square feet, capped at $1,500. The regular method uses actual rent, utilities, and insurance prorated by business-use percentage, and often produces a larger deduction if you keep the records.19Internal Revenue Service. Simplified Option for Home Office Deduction
- Vehicle mileage. The 2026 standard mileage rate is 72.5 cents per business mile. Keep a contemporaneous log. Driving between client sites or to pick up supplies counts; commuting from home to a regular workplace does not.20Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents
Three more deductions sit outside Schedule C but still cut your tax bill. Half of your self-employment tax comes off your income on Schedule 1, reducing income tax though not SE tax itself.6Internal Revenue Service. Topic No. 554, Self-Employment Tax Self-employed health, dental, and vision premiums are 100% deductible on Schedule 1 if you aren’t eligible for an employer-subsidized plan through a spouse.21Internal Revenue Service. Instructions for Form 7206 And the Qualified Business Income deduction, made permanent by the One, Big, Beautiful Bill Act, lets eligible self-employed taxpayers deduct up to 20% of qualified business income, with phase-outs starting around $197,300 single and $394,600 joint for 2026.9Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
Filing the Annual Return That Reconciles Everything
Your quarterly payments are deposits against a bill you finalize on Form 1040. Three forms do the work. Schedule C reports gross 1099 income and business expenses to produce net profit.18Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss From Business (Sole Proprietorship) If several 1099 clients paid you for the same kind of work, that all goes on one Schedule C; genuinely separate businesses each get their own. Schedule SE turns that net profit into your self-employment tax, and half of it flows back as a deduction.6Internal Revenue Service. Topic No. 554, Self-Employment Tax Form 1040 pulls everything together: net business income, above-the-line deductions, standard or itemized deductions, QBI, tax brackets, and self-employment tax add up to your total liability. Subtract your four quarterly payments. If they were more than the liability, you get a refund. If they were less, you pay the difference, plus a possible underpayment penalty if the shortfall broke through the safe harbor.10Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
Hang onto every 1099-NEC, bank statement, receipt, and mileage log. The IRS generally has three years from your filing date to audit a return, so keep records at least that long.
Don’t Forget State Taxes
Federal payments are only one half of the picture. Most states with an income tax require their own quarterly estimated payments, and the thresholds vary: some trigger at as little as $100 of expected liability, others match the federal $1,000, and a handful of states have no income tax at all. Check your state department of revenue for its thresholds, deadlines, and any safe harbor rules. If you work in a state where you don’t live, that state may also claim tax on the income earned there, so contractors who cross state lines or work remotely for out-of-state clients should look into the specific sourcing rules before filing.