All Tax Calculators Tools
Bonus Tax Calculator
See exactly how much tax is withheld from your bonus — flat rate vs aggregate method, federal + state + FICA
Canadian GST/HST Calculator
Calculate GST, HST, PST, and QST by province -- add tax, remove tax, or find the tax amount
Capital Gains Tax Calculator
Estimate your 2025 US capital gains tax — short-term vs long-term rates, NIIT surcharge, and net proceeds
Crypto Capital Gains Calculator
Calculate capital gains tax on cryptocurrency transactions — cost basis, holding period, and estimated tax owed
German Brutto/Netto Calculator
Calculate your German gross-to-net salary with income tax, social security contributions, church tax, and solidarity surcharge
Mileage Deduction Calculator
Calculate your IRS standard mileage deduction for business, medical, and charity driving — free, instant, no signup
Pay Period Calculator
Calculate your gross pay per period and generate upcoming paycheck dates for weekly, bi-weekly, semi-monthly, and monthly schedules
Paycheck Calculator
Calculate your exact take-home pay after federal taxes, state taxes, FICA, and pre-tax deductions — free, private, no signup
Quarterly Estimated Tax Calculator
Calculate your quarterly estimated tax payments for 2026 — free, instant, no signup
Rental Income Tax Calculator
Calculate taxable rental income after deductions, depreciation, and estimate your tax liability
RSU & Stock Option Tax Calculator
Calculate taxes on RSU vesting, ISO exercises, and NSO exercises with holding period analysis and comparison
Self-Employment Tax Calculator
Estimate your 1099 SE tax, income tax, and quarterly payments — free, instant, no signup
Side Hustle Income Calculator
Estimate your net take-home after self-employment tax, federal income tax, and state tax
Tax Bracket Calculator
Calculate your 2025 US federal income tax by bracket — see exactly how much tax you owe in each bracket, your effective rate, and your marginal rate
UK National Insurance Calculator
Calculate employee NI, employer NI, student loan repayments, and take-home pay for 2025/26
UK Stamp Duty Calculator
Calculate Stamp Duty Land Tax on UK property purchases — free, instant results
VAT Calculator
Calculate VAT for 50+ countries — add VAT, remove VAT, or find the VAT amount with accurate standard rates
W-4 Withholding Calculator
Optimize your W-4 form to get the right amount withheld from each paycheck — avoid a big tax bill or an oversized refund
WFH Tax Deduction Calculator
Estimate your home office tax deduction using simplified or actual expense method — free, instant, no signup
Tax Calculators on FastTools are free, browser-based tools designed to help you get quick answers without signups or downloads. Every calculator runs entirely in your browser — your data never leaves your device.
Whether you're planning, budgeting, or just curious, these tools are built to be fast, accurate, and private. Pick any tool below to get started instantly.
Frequently Asked Questions
Are these tax calculators free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.