U.S. financial tools

These are the calculators on Danfio whose formulas, defaults or rules come directly from U.S. tax, payroll, retirement, mortgage, credit and insurance systems. Each group explains what it covers, and every link opens the full tool; nothing you enter leaves your browser.

Taxes & Credits

Federal and state income tax, deductions, credits, capital gains and sales tax.

18 tools in this group

Payroll, Self-Employment & Business

Paychecks, payroll tax, bonuses, tips and self-employment income.

9 tools in this group

Family & Health Benefits

Alimony, child support, ACA subsidies, COBRA, HSA and disability cover.

6 tools in this group

Retirement & Social Security

401(k)s, rollovers, Roth comparisons, Social Security and retirement tax savings.

5 tools in this group

Mortgages & Home

APR, closing costs, FHA/VA/HELOC, property tax, reverse mortgages, DTI and solar payback with U.S. clean-energy credits.

9 tools in this group

Credit & Insurance

Credit scores, utilization, charge-offs, auto insurance and Medicare costs.

6 tools in this group

How these calculators work

Every calculator here applies published U.S. federal rules, plus the state rules a page names, for the year that page states: tax brackets, contribution limits, benefit formulas and income thresholds. Change one input - income, filing status, loan amount, age - and the answer changes with it, because the figure is computed from what you enter rather than looked up from a table.

Federal, state and local rules do not always agree, and they move between tax years. A page covers the jurisdiction and the situation it names rather than every one that exists: local surtaxes, a mid-year move, a credit that phases out, or an agency reading your own file differently can all push the real number away from the estimate here.

All of it runs in your browser, so nothing you type is uploaded or stored. Treat each result as an estimate for planning: it is not a filed return, not a quote, and not tax, legal or financial advice. Check the figure against your own documents, and take a qualified professional view when the amount matters.

Official sources

Disclaimer

This page is an estimate from the numbers you enter, not a return and not tax advice.

These calculators provide estimates for informational purposes only. Results depend on the inputs, assumptions, applicable tax year, and relevant federal, state, or local rules. They are not a substitute for individualized tax, legal, or financial advice.