About ToolsDoc
ToolsDocis a free set of US tax and personal finance calculators. Every state plus the District of Columbia has its own income tax and sales tax calculator, prefilled with that jurisdiction's actual brackets, flat rate, standard deduction, and sales tax rates — alongside federal income tax, FICA, self-employment, withholding, and paycheck tools.
Why we built this
US tax varies enormously by state, and most calculators online either ignore that entirely or bury a state dropdown inside a page that assumes you already know your taxable income. We wanted the opposite: a page per state, with that state's real numbers already filled in, an explanation of how its system actually works, and a take-home figure you can compare directly against another state.
How the calculators work
Every calculator runs entirely in your browser using JavaScript. When you enter an income or a purchase amount, the computation happens on your device — nothing is uploaded to a server or stored in a database. That keeps results instant and keeps your financial figures private by design. A small number of tools that need live external data, such as metal-price lookups, fetch current rates from a third-party provider but never send your input anywhere.
What you'll find here
- State income tax calculators — one for each of the 50 states and DC, showing state tax, effective and marginal rates, federal tax, FICA, and resulting annual and monthly take-home pay.
- State sales tax calculators — state rate and average combined state plus local rate for every state, with an editable rate field for your exact locality.
- Federal tax calculators — income tax, FICA, self-employment tax, AMT, the child tax credit, EITC, and estate and gift tax.
- Paycheck and withholding — salaried and hourly paycheck estimates, bonus tax, W-4 withholding, and quarterly estimated tax for freelancers.
- Business and finance — profit, margin, break-even, and related everyday business calculations.
Our approach to accuracy
State brackets, standard deductions, and sales tax rates come from published state revenue department figures and Tax Foundation data, and federal figures follow published IRS guidance for the relevant tax year. Where a state's rules are more complicated than a calculator can reasonably model — local county income taxes, phased-out deductions, surtaxes above high thresholds — we say so on the page rather than quietly rounding it away.
These are planning estimates, not tax advice. Tax law changes every year and depends on circumstances no calculator sees. For anything you actually file, confirm the numbers with the IRS, your state revenue department, or a qualified tax professional. See our Terms of Service for details.
No accounts, no clutter
You don't need to sign up, log in, or install anything to use ToolsDoc. Open a calculator, use it, and leave — that's the whole experience. We keep advertising minimal and never require payment to access a tool.
Still growing
We're actively adding calculators and state tax guides based on what people search for and ask us about. If there's a calculator you wish existed, let us know through our Contact page — we read every suggestion.