Finance is the highest-stakes category we publish, which is why every calculator carries a reviewer byline and why we list every assumption the engine makes. A mortgage calculator that doesn't tell you it excludes taxes and insurance is dangerous. A tax calculator that doesn't show which bracket schedule it used is useless. We do both. Across all finance tools we default to transparent formulas, annualized figures, and conservative rounding — you can always export the full amortization or bracket breakdown for a specific calculation.
Finance & Investment Calculators
9 free, peer-reviewed finance & investment calculators
Money math — mortgages, loans, investments, tax take-home, retirement. Every calculator here cites the primary source (CFPB, Freddie Mac, IRS) and is reviewed by a finance editor before publish.
Auto Loan1
Savings2
Credit Card1
Tax2
Loans1
Mortgage1
Retirement1
About finance & investment calculators
Frequently asked questions
How recent are the tax brackets / interest rates?
Reference data (tax brackets, Freddie Mac weekly rates) carries a version stamp visible on each calculator. We refresh when the authoritative source publishes — typically weekly for rates, annually for brackets.
Can I use these for tax filing?
These are estimation tools — accurate enough for planning, not a substitute for tax software or an accountant when filing. We say this explicitly on each YMYL calculator.
Do you account for state taxes?
Where the calculator's scope includes state-level math (income tax, sales tax), yes. General-purpose calculators (mortgage, compound interest) are state-agnostic and call that out in the disclaimer.