Tax
Tax rules change on a published calendar and old rules still apply to old years, so every tool here resolves its constants from a versioned ruleset keyed to the year you select, never to today. The effective date and the primary source are shown on the page, not buried in a footer.
Income Tax
Income Tax Refund EstimatorYour refund, and the interest the tax authority owes you on it if it is late. That interest is routinely overlooked and is taxable when you receive it.Federal Income Tax CalculatorFederal income tax for the year and filing status you select, with the bracket breakdown and both rates shown. The marginal rate is what your next dollar costs; the effective rate is what you actually paid.State Income Tax CalculatorState income tax across the three structures states actually use. Nine states levy none, several use a single flat rate, and the rest are progressive with brackets that differ enormously.Federal + State Tax CalculatorFederal, state, local and payroll tax combined. The effective rate across all four layers is the number that describes what you actually pay, and it is always well below the marginal rate.Marginal vs Effective Tax Rate CalculatorThe two rates that get confused with each other. The marginal rate decides what a raise is worth; the effective rate is what the year actually cost. Under any progressive schedule the second is always lower.Tax Bracket CalculatorWhich bracket a given taxable income falls in, how much of the income is actually taxed at that rate, and how far the next bracket is. Being in a bracket says almost nothing about what you pay.Estimated Quarterly Tax CalculatorQuarterly estimated tax under the safe harbour rules. Paying on last year's tax avoids penalties regardless of what this year turns out to be, which is the point of the rule and the reason a good year need not be estimated precisely.Alternative Minimum Tax CalculatorAlternative minimum tax. AMT is the excess of a parallel calculation over your regular tax, and the exercise of incentive stock options is the single most common trigger.Tax on Dividend Income CalculatorTax on dividend income. Dividends are taxed in the shareholder's hands at slab rates in India since the dividend distribution tax was abolished, and only interest on borrowing is deductible, capped at twenty percent.
Deductions
Standard vs Itemized Deduction CalculatorStandard against itemised deduction. The SALT cap and the medical expense floor are what usually keep itemised totals below the standard deduction, even for people with substantial deductible costs.Student Loan Interest Deduction CalculatorStudent loan interest deduction. It is an above-the-line deduction, so it works without itemising, but it is capped and phases out over a narrow income band.QBI Deduction CalculatorSection 199A qualified business income deduction. Below the income threshold it is simply twenty percent; above it, wage limits apply and service businesses lose it entirely.
Credits
Child Tax Credit CalculatorChild tax credit with the phase-out. The reduction steps by fifty dollars per thousand of income above the threshold, and the step is applied to a rounded-up count, so a single dollar of extra income can cost fifty.Earned Income Tax Credit CalculatorEarned income tax credit across its three phases. On the phase-in the credit rises with income, giving a negative effective marginal tax rate, and on the phase-out it falls, adding to the marginal rate.Dependent Care Credit CalculatorChild and dependent care credit. Three limits apply and the smallest binds: the expense cap, the lower-earning spouse's income, and any dependent care FSA already used.
Sales Tax
Sales Tax CalculatorSales tax with the state and local rates separated, which is what lets you check a rate you were charged. A combined rate on a receipt is usually two or three jurisdictions stacked, and exempt items sit in the same basket at zero.Reverse Sales Tax CalculatorThe pre-tax price inside a total that already includes sales tax, and the tax it contains. Useful for expense claims and for splitting a receipt that shows only the final figure.
Property
Estate
Gift Tax CalculatorGift tax exposure in the US. The annual exclusion applies per recipient per year and doubles with spousal splitting, and anything above it consumes lifetime exemption rather than triggering an immediate tax bill.Estate Tax CalculatorFederal estate tax. The exemption is large, is reduced by lifetime gifts already made, and can be doubled by porting an unused spousal exemption, which requires a return to be filed.