How is income tax calculated?

Most countries use progressive brackets: each slice of your income is taxed at that bracket's rate, not your whole income at the top rate. This calculator applies your region's bracket table band by band and adds the results to estimate your total tax.

Why is my whole salary not taxed at one rate?

Because brackets are progressive. If you move into a higher bracket, only the income above that threshold is taxed at the higher rate, not all of it. That is why a small raise can never leave you with less take-home pay.

Does this include the personal allowance or standard deduction?

Yes, if you tick the allowance option the calculator subtracts your region's personal allowance (UK) or standard deduction (US) before applying brackets. Untick it to tax the full amount you enter, which is useful if you have already applied your own deductions.

Does this cover state, National Insurance or other taxes?

No — it estimates national-level income tax only, for the US, UK, India, Pakistan or Bangladesh depending on the region you pick. It does not include US state tax, National Insurance, Medicare, provincial duties, surcharge or cess. For pay after all those deductions, use our take-home pay calculator.

Which tax year does this use?

The calculator uses one recent tax year's published brackets and allowances for each region, noted on the page. Because brackets and thresholds change every year, always confirm the current figures with your tax authority before relying on the result.

Are these income tax figures official?

No. This is a simplified estimate that ignores credits, reliefs and most deductions, so your real bill will differ. It is not tax advice — for filing or planning, use your tax authority's tools or a qualified tax professional.

Income Tax Calculator

This income tax calculator estimates the tax you owe on a taxable income using progressive brackets for the US, UK, India, Pakistan or Bangladesh. Pick your region, enter your annual taxable income, and see your total tax, after-tax income, effective rate and marginal (top) bracket — plus a band-by-band breakdown so you can see exactly where each slice of income is taxed.

Your details

Region

Loads that region's bracket table, currency and personal allowance / standard deduction.

Filing status (US only)

Selects the bracket set; only used for the United States.

Annual taxable income

Enter your gross annual income before tax (or after your own deductions if you leave the allowance unticked).

Apply standard allowance / deduction

Result

Total income tax

—

After-tax income: —
Effective tax rate: —
Marginal (top) bracket: —

Per-bracket breakdown

Bracket range	Rate	Tax in band

Estimate only. This tool models one country's national income tax brackets for one tax year and ignores credits, reliefs, most deductions, state/provincial tax, National Insurance, Medicare, surcharge and cess. Bracket tables and allowances change every tax year — confirm current figures with your tax authority. This is not tax advice.

How to use this income tax calculator

Pick your region first — the calculator swaps in that country's bracket table, currency symbol and personal allowance or standard deduction automatically. US filers also choose a filing status (single or married filing jointly), since the US runs separate bracket sets for each. Enter your annual taxable income — that is your income before national income tax is applied — and decide whether to let the calculator subtract the region's standard allowance or deduction first. Press Calculate and the results panel shows your total estimated tax, what is left after tax, your effective rate, your top (marginal) bracket, and a band-by-band breakdown of exactly how much tax falls in each slice of income.

How progressive income tax works

Brackets, marginal rate and effective rate explained

A progressive tax system splits your income into bands (brackets), each taxed at its own rate. The first slice of income is taxed at the lowest rate, the next slice at the next rate, and so on — only the portion of income that falls inside a given band is taxed at that band's rate. Your marginal rate is the rate that applies to your last dollar of income (the top bracket you reach), while your effective rate is your total tax divided by your total income. The effective rate is always lower than the marginal rate, because the earlier, lower-taxed bands pull the average down.

Worked example across three brackets

Imagine a simplified system with bands of 0% up to 10,000, 10% from 10,000 to 40,000, and 20% above 40,000. Someone with a taxable income of 50,000 pays nothing on the first 10,000, 10% on the next 30,000 (3,000), and 20% on the final 10,000 (2,000) — a total of 5,000. Their marginal rate is 20% (the band their last dollar sits in), but their effective rate is only 5,000 ÷ 50,000 = 10%. That gap between marginal and effective is the whole point of a progressive system, and it is exactly what the per-bracket breakdown table on this page makes visible for your own numbers.

Income tax by country

US federal brackets and the standard deduction

The calculator uses the 2024 US federal income tax brackets (seven bands from 10% to 37%) with separate tables for single filers and married filing jointly, plus the 2024 standard deduction ($14,600 single / $29,200 married) when the allowance option is ticked. It does not add state income tax, Social Security, Medicare or Net Investment Income Tax — those live outside this estimate.

UK income tax bands and the personal allowance

For the United Kingdom, the calculator applies the 2024/25 income tax bands — basic rate 20%, higher rate 40% and additional rate 45% — together with the £12,570 personal allowance when the allowance box is ticked. It does not model the allowance taper above £100,000, National Insurance, the Scottish rate bands, or dividend/savings allowances.

India income tax slabs (note: old vs new regime)

India has two parallel systems: the older regime with deduction-heavy slabs, and the new regime (FY 2024-25 / AY 2025-26), which this calculator uses — slabs from 0% up to ₹3,00,000, rising in steps to 30% above ₹15,00,000, with a ₹75,000 standard deduction for salaried taxpayers when the allowance option is ticked. It does not model rebates such as section 87A, cess/surcharge, or the deduction-rich old regime.

Pakistan salaried-individual slabs (FY 2024-25)

For Pakistan, the calculator applies the FBR salaried-individual slabs effective 1 July 2024 (FY 2024-25) — six bands running from 0% on the first Rs 600,000 of annual income up to 35% above Rs 4,100,000. Because the bottom band already covers the tax-free threshold, the allowance toggle has no extra effect for Pakistan — the 0% band is the allowance. The model does not include surcharge or any non-salary income rules.

Bangladesh individual taxpayer slabs (FY 2024-25)

For Bangladesh, the calculator uses the NBR general individual taxpayer slabs for FY 2024-25 — six bands from 0% on the first Tk 350,000 up to 25% above Tk 1,850,000. As with Pakistan, the 0% band already serves as the tax-free threshold, so the allowance toggle is a no-op here. Note that women, senior citizens (65+) and persons with disabilities have higher tax-free thresholds under NBR rules, which this simplified general-taxpayer model does not include.

What this calculator does not include

This page estimates national-level income tax only. Depending on your region it leaves out: US state and local income tax, Social Security and Medicare; UK National Insurance, the Scottish rate bands and the personal-allowance taper; Indian cess, surcharge and section 87A rebates plus the old-regime deduction system; and Pakistani or Bangladeshi surcharge, non-salary income treatment and special thresholds for women, seniors and persons with disabilities. It also ignores credits, reliefs, dependents, and most deductions beyond the single standard allowance toggle. For a fuller picture of pay after deductions and for consumption taxes, check back soon — dedicated take-home pay and sales tax calculators are on our roadmap.

Disclaimer

This calculator is provided for general estimation and educational purposes only and is not tax advice. Income tax brackets, personal allowances, standard deductions and thresholds change every tax year in every country covered here, and real bills also depend on credits, reliefs, deductions, filing status nuances, other income, residency rules, surcharge/cess and — for the US, UK, India, Pakistan and Bangladesh alike — taxes and contributions this tool does not model (state/provincial tax, National Insurance, social-security style contributions, and more). Always confirm current figures with your country's tax authority or a qualified tax professional before making financial decisions.

Frequently asked questions

How is income tax calculated?: Most countries use progressive brackets: each slice of your income is taxed at that bracket's rate, not your whole income at the top rate. This calculator applies your region's bracket table band by band and adds the results to estimate your total tax.
What is the difference between my marginal and effective tax rate?: Your marginal rate is the rate on your last dollar of income — the top bracket you reach. Your effective rate is your total tax divided by your total income, which is always lower because the early brackets are taxed less. This tool shows both.
Why is my whole salary not taxed at one rate?: Because brackets are progressive. If you move into a higher bracket, only the income above that threshold is taxed at the higher rate, not all of it. That is why a small raise can never leave you with less take-home pay.
Does this include the personal allowance or standard deduction?: Yes, if you tick the allowance option the calculator subtracts your region's personal allowance (UK) or standard deduction (US) before applying brackets. Untick it to tax the full amount you enter, which is useful if you have already applied your own deductions.
Does this cover state, National Insurance or other taxes?: No — it estimates national-level income tax only, for the US, UK, India, Pakistan or Bangladesh depending on the region you pick. It does not include US state tax, National Insurance, Medicare, provincial duties, surcharge or cess. For pay after all those deductions, use our take-home pay calculator.
Which tax year does this use?: The calculator uses one recent tax year's published brackets and allowances for each region, noted on the page. Because brackets and thresholds change every year, always confirm the current figures with your tax authority before relying on the result.
Are these income tax figures official?: No. This is a simplified estimate that ignores credits, reliefs and most deductions, so your real bill will differ. It is not tax advice — for filing or planning, use your tax authority's tools or a qualified tax professional.