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Enter what you expect for 2026. The calculator figures self-employment tax, income tax from the 2026 rate schedules, the safe-harbor payment and a per-quarter amount.
Not tax advice. A rough estimate only. This follows the main lines of the 2026 Form 1040-ES worksheet with simple inputs. It leaves out things like the additional 0.9% Medicare tax, capital gains rates, AMT and most credits. Use the IRS worksheet or a tax professional for your actual payments.
Confirmed in the 2026 Form 1040-ES (checked Oct 31, 2026). Change them if the IRS updates the form.
Source: 2026 Form 1040-ES, Payment Due Dates.
Per the 2026 Form 1040-ES, you generally have to pay estimated tax if you expect to owe at least $1,000 after withholding and refundable credits, and your withholding and credits will be less than the smaller of:
Farmers and fishers have different rules. Paying the safe-harbor amount can avoid the underpayment penalty, but you may still owe tax when you file.
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How-to guide: How to Estimate Quarterly Taxes When You're Self-Employed (2026)
How-to guide: How to Estimate Quarterly Taxes When You're Self-Employed (2026)
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