Calculators that show their working
Tax, mortgages, loans, saving, and debt — worked out step by step, with every intermediate figure on the page instead of one number you have to take on trust. Free, no account, and nothing you type leaves your browser.
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Individual taxes
Federal returns, refunds, and deductions for individuals and families.
Paycheck and payroll
What lands in your account, and what an employer actually pays.
Investment taxes
Capital gains, dividends, and the tax on net investment income.
Business and self-employment
Schedule C profit, self-employment tax, and quarterly payments.
Sales and local taxes
Sales tax at the register, and state and local income tax.
- Sales Tax Calculator
- State Income Tax Calculator — in development
Home and property
What a mortgage actually costs each month, and over its life.
- Mortgage Calculator
- Property Tax — in development
Loans and borrowing
Payments, total interest, and amortization on money you borrow.
Saving and investing
How money grows over time, with and without regular contributions.
Debt payoff
How long a balance takes to clear, and what the interest costs.
Estate and retirement
Longer-horizon planning tools.
- Estate Tax Calculator
- Gift Tax Calculator
- 401(k) and IRA tax savings — in development
Where the numbers come from
The 2026 rate schedules, standard deductions, and capital gains thresholds used across this site are transcribed from IRS Rev. Proc. 2025-32 as published in Internal Revenue Bulletin 2025-45. The Social Security wage base comes from the Social Security Administration.
Where a figure could not be confirmed against a primary government source, it is left out rather than estimated, and the calculator tells you when that has affected your result. Our methodology page explains how each figure is checked, and sources lists them in full.
For educational and estimation purposes only. Nothing here is tax advice.
Your figures stay on your device
Every calculation runs in your browser. Nothing you type is sent to a server, written to a database, or included in analytics. We never ask for your name, address, Social Security number, or account details, and we have no way to see what you entered.
The "copy link" button on each calculator builds a shareable URL containing your inputs. That link is created in your address bar and is yours alone unless you choose to send it to someone. Read the privacy policy for the detail.