Tools

Free calculators for one-person businesses. No sign-up needed. Everything runs in your browser; nothing you type is saved.

How much to set aside for taxes

Your self-employment tax, federal income tax and the percentage to move aside from every payment, using 2026 numbers. From The Self-Employed Tax Survival Guide.

2026 federal estimate. Add your state's income tax on top. Not tax advice.

Self-employment tax
$ —
Federal income tax
$ —
Set aside from every payment
— %
Actually yours
$ —

S-corp: what you actually keep

Payroll-tax savings minus the costs most calculators skip: the smaller QBI deduction and about $2,000 a year to run an S-corp.

S-corp: what you actually keep

Free calculator
Reasonable salary (assumed 50% of profit)
$ —
Owner distribution
$ —
Payroll-tax savings vs. sole prop
$ —
Extra income tax (smaller QBI deduction)
$ —
S-corp running costs (payroll, tax prep)
$ —
What you actually keep per year
$ —

Rough 2026 federal estimate, single filer, one-person S-corp. Excludes state taxes. Above about $200k, talk to a CPA. Not tax advice.

Quarterly tax estimator

What to pay the IRS on the next due date. It uses the cheaper of the two safe methods (90% of this year or 100% of last year), so you stay penalty-free without overpaying.

Your 2026 federal tax (estimate)
$ —
Minimum to avoid a penalty
$ —
Already paid
$ —
Payments left
—
Pay by
$ —
To owe nothing in April
$ —

Paying the minimum on time keeps you penalty-free; you settle the rest when you file. Missed earlier payments can still have a small penalty, so catch up now. Federal only, 2026 numbers. Not tax advice.

Coming soon

  • Self-employment tax calculator: what you owe, and how to lower it.

Every calculator gives a rough estimate for education, not tax advice. Check your numbers with a tax professional before acting on them.

© 2026 Payroll of One. Not tax or legal advice. Some links are affiliate links.