Taxes
How to Calculate Quarterly Taxes as a Freelancer (2026 Guide)
By Sam Rivera8 min
USA
Self-Employment
Taxes
Deductions
2026
About the author
Sam Rivera
Founder, GigProfit · Software engineer & freelance tax researcher
Sam Rivera has spent 8+ years working across freelance markets in North America, Europe, and Asia — both as a practitioner and as a builder of tools for independent professionals. The tax engine behind GigProfit was built by cross-referencing official government publications and updated as regulations change.
·8+ years freelancing across US, EU, TR, and APAC clients
·Tax engine reviewed against official IRS, HMRC, GİB, and GST Council documentation
·Open-source contributor at github.com/SkrenLabs