✅ Current for tax year 2026
Being your own boss means being your own payroll department. Nobody withholds tax from a 1099 payment the way an employer withholds it from a paycheck — the responsibility for setting money aside, and sending it to the IRS four times a year, falls entirely on you. This calculator turns your net self-employment income into a real number: what you’ll owe in self-employment tax, what you’ll owe in federal income tax, and how much to set aside each quarter.
Your 2026 estimate
Safe harbor tip: the IRS generally will not charge an underpayment penalty if your quarterly payments total at least 100% of last year's tax bill (110% if last year's adjusted gross income was over $150,000). Compare that number to the estimate above and pay whichever is higher if you want zero penalty risk.
This calculator gives a simplified estimate for 2026 using published IRS brackets, the standard deduction, and current Social Security/Medicare rates. It does not account for the Qualified Business Income (Section 199A) deduction, state taxes, tax credits, or itemized deductions — your actual bill is very likely lower than this estimate once those are applied. This is general information, not tax advice; for an exact number, use IRS Form 1040-ES or a tax professional.
Data sources for this calculator (2026 figures):
- IRS Rev. Proc. 2025-32 — 2026 federal income tax brackets and standard deduction
- Social Security Administration, 2026 COLA release — 2026 Social Security wage base ($184,500)
What this calculator actually estimates
Two separate taxes get added together here, and it’s worth knowing the difference. Self-employment tax is 15.3% of most of your net income — 12.4% for Social Security (up to the $184,500 wage base for 2026) and 2.9% for Medicare, with no cap. It exists because as a 1099 worker you’re paying both the “employee” and “employer” halves of FICA that a traditional job would split with you. Federal income tax is calculated separately, on top of that, using the current year’s brackets and standard deduction — and half of your self-employment tax is deductible before that calculation happens, which this tool accounts for automatically.
How to use it
- Enter your net self-employment income — that’s revenue minus business expenses (your Schedule C bottom line), not your gross revenue.
- Add any other W-2 wages if you also have a regular job — this matters because it affects how much of your self-employment income still falls under the Social Security wage base.
- Pick your filing status and hit calculate.
A quick example
Say you netted $60,000 freelancing in 2026 with no other income, filing single. The calculator applies the 15.3% self-employment tax to most of that $60,000, then calculates federal income tax on what’s left after the standard deduction and the self-employment tax deduction. Add the two together and divide by four, and you’ve got a reasonable quarterly payment to send the IRS using Form 1040-ES — instead of guessing, or finding out in April that you set aside too little.
What this estimate leaves out
This is a simplified estimate, not a filed return. It doesn’t include the Qualified Business Income (QBI) deduction, which can shave up to 20% off your taxable business income for many self-employed people — meaning your real bill is often lower than this number. It also doesn’t include state income tax, tax credits, or itemized deductions. And if part of your net income is tips, the 2025-2028 tips deduction can lower your income tax further, separately from anything shown here. Treat this as a solid starting point for your quarterly planning, not a final figure.
Curious what a W-2 job would cost you instead?
If you’re weighing a 1099 offer against a salaried job — or wondering whether your freelance income is really worth more or less than an equivalent paycheck — the 1099 vs. W-2 calculator runs the same income both ways side by side.
What happens if you skip a quarter
Missing or underpaying a quarterly payment doesn’t just delay when you pay — it can trigger an underpayment penalty calculated separately for each quarter, based on how much was due and how late it arrived, using an IRS-set interest rate that adjusts periodically. Paying late in Q1 and catching up in Q4 doesn’t erase the Q1 penalty, even if your total for the year ends up correct — the IRS looks at each quarter’s timing individually, not just the year-end total. If you know a specific quarter will be short, paying as much as you can by that quarter’s deadline still reduces the penalty compared to paying nothing until the next one.
What counts as “safe harbor”
A common way to avoid any underpayment penalty regardless of how your income actually turns out is the safe harbor rule: paying at least 100% of last year’s total tax liability (110% if last year’s AGI was above $150,000) spread across your four quarterly payments guarantees no penalty, even if this year’s actual liability ends up much higher. This is particularly useful in an unpredictable income year — rather than trying to forecast exactly what you’ll owe, basing payments on last year’s known number sidesteps the guesswork entirely. It doesn’t reduce what you ultimately owe; if this year is a bigger income year, you’ll still pay the difference when you file. It just protects you from a penalty for underestimating along the way.