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US & UK Tax Calculators
Fast, accurate tax calculators for the US and UK — and the cross-border cases in between. Every tool gives you a free, TaxStone-branded PDF of your result.
US tax calculators
Federal income tax, take-home pay, self-employment and capital gains — built on the latest IRS figures.
Tax year 2025US Federal Income Tax Calculator
Estimate your 2025 US federal income tax, marginal and effective rates, and after-tax income by filing status. Free calculator with a branded PDF report.Open calculator →
Tax year 2025US Take-Home Pay Calculator
Calculate your 2025 US take-home pay after federal income tax and FICA (Social Security + Medicare). Free paycheck calculator with a branded PDF report.Open calculator →
Tax year 2025US Self-Employment Tax Calculator
Calculate your 2025 US self-employment tax (Social Security + Medicare) on 1099 or freelance income. Free calculator with a branded PDF report.Open calculator →
Tax year 2025US Capital Gains Tax Calculator
Calculate US federal tax on a 2025 long-term capital gain — the 0%, 15% and 20% rates plus the 3.8% NIIT. Free calculator with a branded PDF report.Open calculator →
Tax year 2025US Crypto Capital Gains Tax Calculator
Estimate 2025 US federal tax on a cryptocurrency gain — short-term ordinary rates or long-term 0/15/20% plus the 3.8% NIIT. Free calculator with a branded PDF report.Open calculator →
Tax year 2025US Child Tax Credit Calculator
Estimate your 2025 Child Tax Credit — $2,200 per qualifying child, the $500 Credit for Other Dependents and the income phase-out. Free calculator with a branded PDF report.Open calculator →
Tax year 2025US Retirement Withdrawal Calculator
Estimate the 2025 federal tax and 10% early-withdrawal penalty on a 401(k) or IRA withdrawal. Free calculator with a branded PDF report.Open calculator →
Tax year 2025US Social Security Taxation Calculator
Work out how much of your Social Security benefits are taxable for 2025 using the IRS provisional-income method (up to 50% or 85%). Free calculator with a branded PDF report.Open calculator →- Tax year 2025
US Net Investment Income Tax (NIIT) Calculator
Calculate the 3.8% Net Investment Income Tax for 2025 — on the lesser of your net investment income or MAGI above $200k (single) / $250k (joint). Free calculator with a branded PDF report.Open calculator → 
Tax year 2025US Alternative Minimum Tax (AMT) Calculator
Estimate your 2025 Alternative Minimum Tax — the exemption, its phase-out, and the 26%/28% rates on Form 6251. Free calculator with a branded PDF report.Open calculator →
Tax year 2026US Federal Estate Tax Calculator
Calculate US federal estate tax for 2026 with the $15,000,000 basic exclusion and 40% top rate. Free calculator for US citizens and cross-border estates, with a branded PDF report.Open calculator →
Tax year 2026US Quarterly Estimated Tax Calculator
Calculate your 2026 US quarterly estimated tax payments using the IRS 90%/100%/110% safe harbor rule. Free calculator with a branded PDF report.Open calculator →
2026US Foreign Earned Income Exclusion Calculator (Form 2555)
Calculate your 2026 foreign earned income exclusion ($132,900) and foreign housing exclusion on Form 2555, including part-year pro-rating. Free calculator with a branded PDF report.Open calculator →
2026US Foreign Tax Credit Calculator
Calculate your Form 1116 foreign tax credit for 2026 — the section 904 limitation, how much credit you can claim, and how much carries forward. Built for Americans in the UK. Free calculator with a branded PDF report.Open calculator →
2026US Gift Tax Calculator
Free 2026 US gift tax calculator. See how much you can give tax-free under the $19,000 annual exclusion, how much of the $15,000,000 lifetime exemption you use, whether Form 709 is required, and the $194,000 exclusion for a non-citizen spouse.Open calculator →
2026US Underpayment Penalty Calculator
Free IRS underpayment penalty calculator for 2026. Check the 90%, 100% and 110% estimated tax safe harbors, see your required quarterly instalment, and estimate the Form 2210 interest on any shortfall using the actual quarterly rates — 7% from January, 6% from April, 7% from July 2026.Open calculator →
2026US Exit Tax Calculator
Free US exit tax calculator for 2026. Run the three covered expatriate tests — $2m net worth, $211,000 average tax, five-year certification — then estimate the section 877A mark-to-market tax after the $910,000 exclusion, including deemed IRA distributions and the 3.8% NIIT.Open calculator →
2026US Charitable Deduction Calculator
Free 2026 charitable deduction calculator applying the new 0.5% of AGI floor, the 2/37 cap that limits high earners to 35 cents on the dollar, and the 60% and 30% AGI ceilings. Shows your real tax benefit, capital gains avoided on donated stock, and any carryforward.Open calculator →
2026US Foreign Housing Exclusion Calculator
Free 2026 foreign housing exclusion calculator for Americans abroad. Applies the $21,264 base amount, the $39,870 standard cap and high-cost city limits like London's $68,600, plus the day-count proration and the FEIE ordering rule. Shows exactly how much rent and utilities you can exclude on Form 2555.Open calculator →
2026QSBS Calculator (Section 1202)
Free 2026 QSBS calculator applying the Section 1202 rules after the One Big Beautiful Bill Act: the $15 million per-issuer cap, the ten-times-basis alternative, and the tiered 50% / 75% / 100% exclusion. Shows the 28% rate on non-excluded gain, the AMT preference, state non-conformity and the UK capital gains charge for founders abroad.Open calculator →
2026SALT Deduction Calculator
Free 2026 SALT deduction calculator applying the $40,400 cap, the 30% phase-down from $505,000 of MAGI, the $10,000 floor and the new 2/37 cap on the value of itemised deductions. Shows what your state and local tax deduction is really worth and the extra effective marginal rate inside the phase-down band.Open calculator →
2026US Roth Conversion Tax Calculator
Free 2026 Roth conversion tax calculator. See the tax cost of converting, the taxable portion after the pro-rata rule, your remaining bracket headroom, the 3.8% NIIT effect and whether you cross the first Medicare IRMAA threshold. Includes the US/UK cross-border position.Open calculator →
UK tax calculators
Take-home pay, dividends and stamp duty — built on the latest HMRC rates for 2025/26.
2025/26UK Take-Home Pay Calculator
Calculate your UK take-home pay for 2025/26 after Income Tax and National Insurance. Free salary-after-tax calculator with a branded PDF report.Open calculator →
2025/26UK Dividend Tax Calculator
Calculate UK tax on your dividends for 2025/26 — the £500 dividend allowance and the 8.75%, 33.75% and 39.35% rates. Free calculator with a branded PDF report.Open calculator →
2025/26UK Stamp Duty (SDLT) Calculator
Calculate your Stamp Duty Land Tax (SDLT) on a home in England or Northern Ireland using the rates from 1 April 2025 — standard, first-time buyer and second-home surcharge. Free, with a branded PDF.Open calculator →
2025/26UK Capital Gains Tax Calculator
Calculate UK Capital Gains Tax for 2025/26 — the £3,000 annual exempt amount and the 18% and 24% rates on shares and property. Free calculator with a branded PDF report.Open calculator →
2025/26UK Self-Employed Tax Calculator
Calculate your 2025/26 Self Assessment bill — Income Tax and Class 4 National Insurance on your self-employment profit. Free calculator with a branded PDF report.Open calculator →
2025/26UK VAT Calculator
Add or remove UK VAT at 20%, 5% or 0%. Work out the VAT, net and gross on any amount for 2025/26. Free calculator with a branded PDF report.Open calculator →
2025/26UK National Insurance Calculator
Calculate your employee (Class 1) National Insurance for 2025/26 — 8% and 2% rates on your salary. Free calculator with a branded PDF report.Open calculator →- 2025/26
UK Inheritance Tax Calculator
Calculate UK Inheritance Tax for 2025/26 — the £325,000 nil-rate band, £175,000 residence nil-rate band, transferable spouse allowances and the 40% (or 36% charity) rate. Free calculator with a branded PDF report.Open calculator → 
2025/26UK High Income Child Benefit Charge Calculator
Calculate your 2025/26 High Income Child Benefit Charge — the £60,000-£80,000 taper and how much Child Benefit it claws back. Free calculator with a branded PDF report.Open calculator →
Tax year 2025/26UK Pension Annual Allowance Calculator (Tapered)
Work out your 2025/26 UK pension annual allowance, including the high-earner taper from £260,000 of adjusted income. Free calculator with a branded PDF report.Open calculator →
2025/26UK Landlord (Buy-to-Let) Tax Calculator
Calculate the Income Tax due on your UK rental profit for 2025/26, including the 20% Section 24 finance-cost tax reduction. Free calculator with a branded PDF report.Open calculator →
FY2026UK Corporation Tax Calculator
Calculate UK Corporation Tax for FY2026 — 19% small profits rate, 25% main rate and Marginal Relief between £50,000 and £250,000, adjusted for associated companies. Free calculator with a branded PDF report.Open calculator →
2026-27UK 60% Tax Trap Calculator
Work out how much Personal Allowance you lose between £100,000 and £125,140 in 2026-27, your true marginal rate, and the pension contribution that escapes the 60% band. Free UK calculator with a branded PDF report.Open calculator →
2026-27UK Bonus Tax Calculator
Free UK bonus tax calculator for 2026-27. See how much Income Tax and National Insurance comes off your bonus, what you actually take home, your real marginal rate, and how much more you keep by sacrificing it into a pension.Open calculator →
2026-27UK Salary Sacrifice Calculator
Free UK salary sacrifice calculator for 2026-27. See what sacrificing into your pension costs in take-home pay, the effective relief rate, the employee and employer National Insurance saved, and how it recovers the Personal Allowance above £100,000.Open calculator →
2025/26UK Payment on Account Calculator
Free UK payment on account calculator for the 31 July 2026 Self Assessment deadline. Work out each instalment, check the £1,000 and 80% exemptions, and see what reducing your payment on account costs in HMRC interest at 7.75% if you get the estimate wrong.Open calculator →
2026/27UK Savings Interest Tax Calculator
Free UK savings interest tax calculator for 2026/27. Applies the £1,000 and £500 personal savings allowance, the £5,000 starting rate for savings and the personal allowance taper, and shows how much more interest you can earn before you pay tax.Open calculator →
2026/27UK Salary vs Dividend Calculator
Free salary vs dividend calculator for 2026/27 using the new 10.75% and 35.75% dividend rates. Compare salary, dividends and employer pension for a limited company director, with Employment Allowance, employer NI and corporation tax marginal relief built in.Open calculator →
2026/27UK Business Asset Disposal Relief Calculator
Free 2026/27 Business Asset Disposal Relief calculator. Applies the new 18% BADR rate, the £1 million lifetime limit, the £3,000 annual exempt amount and the 24% rate above the limit, and shows what BADR saves you — plus a US capital gains top-up estimate for US-citizen founders.Open calculator →
2026/27 and 2027/28Cash ISA Limit Calculator
Free calculator for the cash ISA limit cut to £12,000 from 6 April 2027. Shows how much shelter you lose, the extra UK tax on displaced savings interest, how the new 22% charge on cash inside a stocks and shares ISA compares, and the US tax that applies to ISA interest for American citizens and Green Card holders in the UK.Open calculator →
2026/27UK Crypto Tax Calculator
Free UK crypto tax calculator for 2026/27: capital gains tax at 18% and 24% after the £3,000 annual exempt amount, staking and mining income at your marginal rate, plus a switch for the proposed Finance Bill 2026-27 no-gain-no-loss and stablecoin exemption rules — and the unrelieved US tax those reforms create for American citizens in the UK.Open calculator →
Cross-border tax?
US and UK at once? Get it checked.
Calculators show one side. If you file in both countries, book a free 20-minute call with a TaxStone Enrolled Agent.