Quarterly Tax Payment Calculator

Estimate your quarterly estimated tax payments to avoid IRS underpayment penalties.

Estimate Your Quarterly Payment

Enter your year-to-date numbers to calculate how much to pay this quarter.

Current Quarter Year-to-Date Gross Income ($) Year-to-Due Business Expenses ($)

YTD SE Tax Already Paid ($)

YTD Federal Tax Already Paid ($)

Filing Status

Why Quarterly Payments Matter

The IRS requires self-employed individuals to pay taxes as they earn income. If you don't pay enough throughout the year, you may face an underpayment penalty — even if you pay your full tax bill by April 15.

The IRS "safe harbor" rule: you won't owe penalties if you pay at least 90% of your current year tax OR 100% of last year's tax (110% if your AGI exceeds $150,000).