CalcPro.pro
UpdatedFreeNo Sign-upWorldwide

Income Tax Calculator

Estimate income tax for US, UK, Canada, and Australia using verified 2025/26 brackets with full breakdown.

Formula verified by CalcPro.pro Editorial TeamLast updated May 2025

Income Tax Estimate

United States — Federal 2025 (filed 2026), Single filer

About This Calculator

This income tax calculator uses verified 2025 tax year rates for the US, UK, Canada, and Australia. For the US, these are the brackets that apply to income earned in 2025 and filed in April 2026, incorporating the OBBBA-adjusted standard deduction. UK rates reflect 2025/26 (April 2025 to April 2026). Canada uses 2025 CRA rates including the July 2025 first-bracket rate cut to 14%. Australia uses Stage 3 tax cut rates continuing in FY2025-26.

How to Use This Calculator

  1. 1Select your country
  2. 2Enter your annual gross income
  3. 3Add any additional deductions beyond the standard deduction if applicable
  4. 4Click Calculate

Formula Used

Taxable Income = Gross Income − Standard Deduction − Additional Deductions | Tax = Sum of (income in each bracket × bracket rate)

Why Trust CalcPro

Verified mathematical formulas
Verified formulas used by financial professionals
Works on desktop and mobile
No data stored or shared
Updated regularly
Advertisement

FAQ

Frequently Asked Questions

Common questions about the income tax calculator answered.

What is the standard deduction in the US for 2025?+
For the 2025 tax year (returns filed in 2026), the standard deduction is $15,750 for single filers and married filing separately. This was raised from the originally planned $15,000 by the One Big Beautiful Bill Act (OBBBA) signed in July 2025. For married filing jointly, the standard deduction is $31,500. Heads of household receive $23,625.
What is the difference between effective and marginal tax rate?+
Your marginal rate is the rate applied to your last dollar of income — the rate in your highest bracket. Your effective rate is total tax divided by total income — your average across all brackets. A US single filer earning $100,000 in 2025 has a 22% marginal rate but an effective federal rate of approximately 15.7%, because lower income portions are taxed at 10% and 12%.
Has Canada's lowest tax rate changed for 2025?+
Yes — Canada reduced its lowest federal income tax rate from 15% to 14%, effective July 1, 2025. Since this applies to the second half of the year, the CRA uses a blended effective rate of 14.5% on the first bracket ($0–$57,375) for the 2025 tax year. The Basic Personal Amount for 2025 is $16,129. From 2026 onward, the first-bracket rate is 14%.
What changed in Australia's income tax for 2025-26?+
The Stage 3 tax cuts that took effect from 1 July 2024 continue to apply in FY2025-26, unchanged. Key rates: 0% on income up to $18,200, 16% on $18,201–$45,000 (reduced from 19%), 30% on $45,001–$135,000 (reduced from 32.5%, with the threshold raised from $120,000), 37% on $135,001–$190,000 (threshold raised from $180,000), 45% above $190,000. The super guarantee rate is 11.5% for 2025-26.
Do I need to pay state or provincial tax separately?+
Yes. This calculator covers national/federal income tax only. US taxpayers also pay state income tax (0% in Texas and Florida; up to 13.3% in California). Canadian taxpayers pay provincial tax in addition to federal (combined rates range from around 20% in Alberta to 53%+ in the highest brackets in some provinces). UK and Australian taxpayers do not pay separate subnational income taxes, but Australians pay the 2% Medicare Levy in addition to income tax.

Income Tax Comparison: US, UK, Canada, Australia (2025–26)

On a $100,000 gross income, the estimated federal/national tax differs significantly by country. A US single filer earning $100,000 in 2025 pays approximately $15,764 in federal income tax (15.8% effective rate) before state tax. A UK taxpayer earning the equivalent (around £79,000) pays approximately £22,660 in income tax. A Canadian earning CA$100,000 pays around CA$18,300 federal (higher provincial tax is additional). An Australian earning A$100,000 pays $20,788 income tax plus $2,000 Medicare Levy.

  • Always calculate both federal and state/provincial tax for your full liability
  • Retirement contributions reduce taxable income in all four countries
  • The UK Personal Allowance is frozen at £12,570 until April 2028 — fiscal drag increases real tax rates
  • Australia's Stage 3 rates provide meaningful tax relief at incomes between $45,000 and $135,000

Related Calculators

You might find these useful too

View all tools