How to use this 1099 tax calculator
Enter your expected gross 1099 income for the year, subtract your business expenses, choose your filing status, and add any W-2 wages from a day job. The calculator applies the official 2026 federal tax rules — self-employment tax on 92.35% of net earnings, the deduction for half of that tax, the standard deduction, the 20% qualified business income (QBI) deduction, and the 2026 income tax brackets — then splits the result into four quarterly payments with their IRS due dates.
If you also fill in the optional fields, the tool subtracts paycheck withholding from what you owe quarterly and shows the safe-harbor amount: the minimum you can pay through the year and still avoid an underpayment penalty, based on last year's tax.
How 1099 taxes actually work
When you're paid on a 1099, no taxes are withheld — you're responsible for two separate federal taxes. Self-employment tax covers Social Security and Medicare at a combined 15.3% (a W-2 employee pays half of this and their employer pays the other half; you pay both halves). Federal income tax then applies to your overall taxable income at the regular bracket rates. Two built-in breaks soften the blow: you deduct half of your self-employment tax from income, and most freelancers qualify for the 20% QBI deduction on business profit.
2026 numbers this calculator uses
| Item | 2026 amount |
|---|---|
| Self-employment tax rate | 15.3% on 92.35% of net earnings |
| Social Security wage base | $184,500 |
| Standard deduction (single / MFJ / HoH) | $16,100 / $32,200 / $24,150 |
| QBI deduction | 20% of qualified business income |
| Income tax rates | 10% – 37% (seven brackets) |
| Quarterly due dates | Apr 15 · Jun 15 · Sep 15 · Jan 15, 2027 |
Source: IRS Revenue Procedure 2025-32. This tool estimates federal taxes only — most states with an income tax also require their own estimated payments.
Three ways to lower your 1099 tax bill
Track every expense. Most overpayment happens because deductible costs never get recorded. Business mileage alone (72.5¢ per mile in 2026) adds up fast for anyone who drives for work.
Fund a retirement account. A SEP IRA or Solo 401(k) lets self-employed workers deduct contributions well beyond normal IRA limits — often the single biggest lever available.
Pay quarterly, on time. The underpayment penalty is effectively an interest charge that compounds against you all year. Hitting the safe-harbor amount each quarter makes it disappear entirely.
Frequently asked questions
How much should I set aside for taxes on 1099 income?
A common rule of thumb is 25%–35% of net income (after expenses), but it varies with your bracket. This calculator shows your actual set-aside percentage based on your numbers — usually more accurate than the rule of thumb by several thousand dollars.
When are quarterly estimated taxes due in 2026?
April 15, 2026 · June 15, 2026 · September 15, 2026 · January 15, 2027. If a date falls on a weekend or federal holiday, payment is due the next business day.
What happens if I skip a quarterly payment?
The IRS charges an underpayment penalty calculated like interest — the federal short-term rate plus 3%, applied per quarter to the amount you should have paid. It applies even if you get a refund at filing time. Paying late is always cheaper than not paying at all, since the clock stops when the money arrives.
What is the safe harbor rule?
You avoid the underpayment penalty if your timely payments total at least 90% of this year's tax or 100% of last year's tax (110% if last year's AGI was over $150,000), whichever is smaller. If your income is growing, the prior-year safe harbor usually means you can legally pay less during the year and settle up in April.
Do I pay self-employment tax if I also have a W-2 job?
Yes, on your self-employment earnings — but your W-2 wages count first toward the $184,500 Social Security wage base. If your day job already uses up the base, the 12.4% Social Security portion of SE tax drops off and only the 2.9% Medicare portion applies. This calculator handles that automatically.
Does this calculator include state taxes?
No — it estimates federal taxes only. Most states with an income tax require separate quarterly estimated payments with their own rules and rates. Check your state revenue department's site for its version of Form 1040-ES.