1099 Tax Calculator (2026)
What to set aside from every payment, and your actual quarterly estimated-tax schedule.
Net profit — after business expenses, before tax.
1099 Tax Calculator
Nobody withholds tax from a 1099 payment — which means the whole amount hits your account, and it’s on you to set money aside and send the IRS quarterly estimated payments yourself. Guess wrong and you either owe a painful lump sum (plus a possible underpayment penalty) in April, or you’ve been sitting on money that should have been earning interest instead of parked for taxes. This calculator gives you a single set-aside percentage to apply to every payment, plus the actual four 2026 due dates and amounts, plus a safe-harbor comparison so you know the minimum you can pay without risking a penalty.
What Actually Makes Up Your Tax Bill
Two separate things: self-employment tax (15.3% of 92.35% of your net profit — Social Security up to the $184,500 2026 wage base, plus uncapped Medicare), and federal income tax on your taxable income after the standard deduction and half of your SE tax (an above-the-line deduction). Add them together and divide by your expected 1099 income, and you get a single set-aside rate — simpler to apply in practice than tracking two separate percentages against every invoice.
2026 Quarterly Due Dates
April 15, 2026 (Q1), June 15, 2026 (Q2), September 15, 2026 (Q3), and January 15, 2027 (Q4, covering the last stretch of 2026). These periods aren’t actually equal in length — Q1 covers January through March, but Q2 covers only April and May — yet the standard, simplest planning approach (and what this calculator uses) is dividing your total estimated tax into four equal payments rather than trying to match each quarter’s actual earnings, which is both harder to track and not required by the IRS as long as your total payments stay on pace.
The Safe Harbor Rule: Your Insurance Against Guessing Wrong
If your income is unpredictable, don’t stress about calculating this year’s tax to the dollar. The IRS generally waives the underpayment penalty if you pay, in total across withholding and estimated payments, the smaller of 90% of your current year’s tax or 100% of last year’s total tax (110% if last year’s adjusted gross income was over $150,000, or $75,000 if married filing separately). Paying based on last year’s number is often the simpler, safer target — it’s a fixed number you already know, not a moving estimate.
Example: $70,000 Net Profit, Single, No W-2 Income
SE-tax base: $70,000 × 92.35% = $64,645. Self-employment tax: $64,645 × 15.3% = $9,890.69. Half of that ($4,945.34) is an above-the-line deduction, leaving federal taxable income of $70,000 − $16,100 (2026 standard deduction) − $4,945.34 = $48,954.66 — which doesn’t even reach the 22% bracket, so it’s taxed at 10% and 12% only, for an estimated federal income tax of $5,626.56. Total estimated tax: $15,517.24 — a set-aside rate of 22.2% of every payment, or $3,879.31 per quarter.
Frequently Asked Questions
How much should I set aside from each 1099 payment?
This calculator computes your total estimated tax (self-employment tax plus federal income tax) as a percentage of your expected 1099 income, giving you a single set-aside rate to apply to every payment you receive — commonly somewhere between 20-35% depending on your income level and filing status.
When are 2026 quarterly estimated tax payments due?
April 15, 2026 (Q1), June 15, 2026 (Q2), September 15, 2026 (Q3), and January 15, 2027 (Q4, for the last quarter of 2026).
What is the safe harbor rule and how does it help me?
You generally avoid an IRS underpayment penalty if you pay, through withholding and estimated payments combined, the smaller of 90% of your current year’s total tax or 100% of your prior year’s total tax (110% if your prior year AGI was over $150,000, or $75,000 if married filing separately).
Is this the same as the Self-Employment Tax Calculator?
They share the same underlying self-employment tax math, but this tool is built for a different, forward-looking question: how much to set aside per payment and what to send the IRS each quarter, for the current (2026) tax year. The Self-Employment Tax Calculator focuses on the annual SE tax total for tax year 2025, matching the rest of this site’s income-tax tools.
This calculator provides a simplified estimate of 2026 self-employment tax, federal income tax, and quarterly payment planning. It does not model state income tax, the Qualified Business Income deduction, or itemized deductions, and divides estimated tax into four equal quarterly payments as a simplification. Check the relevant government tax authority or a qualified tax professional for advice about your specific situation.
