00 / Free tool
Quarterly Tax Estimator
Calculate your estimated quarterly tax payments including federal income tax, self-employment tax, and state taxes.
01 / Calculator
Quarterly Tax Estimator
Inputs
Quarter
Results
Q1 Estimated Payment
$13,033
Due: Apr 15
$22,847
Federal Income Tax
$5,712 / quarter
$17,662
Self-Employment Tax
$4,415 / quarter
$11,625
State Tax
$2,906 / quarter -- 9.3% rate
$52,134
Total Annual Tax
$13,033 / quarter
34.8%
Effective Tax Rate
$125,000
Taxable Income
Income Breakdown
02 / Notes
How it works
If you earn income that is not subject to withholding -- such as self-employment income, freelance earnings, or business profits -- you are required to make quarterly estimated tax payments to the IRS. These payments cover your federal income tax, self-employment tax (Social Security and Medicare for self-employed individuals), and state income tax. The IRS expects payments four times a year, and missing them can result in underpayment penalties. Self-employment tax is 15.3% on 92.35% of your net self-employment income (12.4% for Social Security, 2.9% for Medicare).
Formula
Taxable Income = Annual Income - Deductions Federal Tax = Sum of bracket calculations on taxable income SE Tax = Taxable Income x 92.35% x 15.3% (sole props and LLCs) State Tax = Taxable Income x State Rate Quarterly Payment = Total Annual Tax / 4
Why it matters for your business
Underpaying estimated taxes leads to penalties and a painful surprise at tax time. The IRS safe harbor rule says you owe no penalty if you pay at least 100% of last year's tax liability (110% if AGI > $150k), or 90% of the current year's liability. Getting your quarterly estimates right means you avoid penalties and maintain predictable cash flow throughout the year.
04 / Next step
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