Massachusetts Freelance Tax Quarter Estimator

Tax quarters shouldn't be a guessing game. Built specifically for Massachusetts-based freelancers, independent contractors, and side-hustlers, this Google Sheets calculator does the math you've been dreading.

Enter your quarterly self-employment income and the sheet auto-calculates your estimated federal tax, Massachusetts state tax (5%), self-employment tax (15.3%), and total quarterly payment amount. A dedicated calendar tab highlights IRS and MA DOR deadlines so you never miss a due date.

The Safe Harbor section checks your prior year tax liability to make sure you won't get hit with an underpayment penalty — the thing most freelance tax guides skip and most freelancers learn about too late.