Free financial calculators with IRS tax brackets, federal rates, and US-specific financial regulations. All data verified from official government sources.
See your investments grow over time
Plan retirement with employer matching
Calculate income tax based on official tax brackets
Calculate payments for any loan type
Monthly payments with taxes and insurance
How much you need to retire comfortably
Car loan payments with down payment
Education loan repayment plans
Should you refinance your mortgage?
Calculate self-employment taxes
Every calculation shown step-by-step with full formula visibility
All data sourced from government agencies with citations
Calculations in your browser - we never store your data