UK Tax Free Calculator
This UK Tax Free Calculator estimates how much of your income is covered by the Personal Allowance — the amount you can earn before paying Income Tax. It also shows how the £100,000 high-income taper can reduce your tax-free allowance.
How Much Income Is Tax Free in the UK?
For the 2026/27 tax year, the standard Personal Allowance is £12,570. This means most people can earn up to £12,570 before paying any Income Tax. However, this allowance can be reduced if your adjusted net income exceeds £100,000.
What Is the UK Personal Allowance?
The Personal Allowance is the amount of income you can earn before you start paying Income Tax. It is available to most UK residents and is automatically applied by employers through PAYE. The standard allowance for 2026/27 is £12,570.
How Does the Personal Allowance Reduce Above £100,000?
If your adjusted net income exceeds £100,000, your Personal Allowance is reduced by £1 for every £2 of income above £100,000. This means:
- At £100,000: Full £12,570 allowance
- At £110,000: Reduced by £5,000 → £7,570 allowance
- At £120,000: Reduced by £10,000 → £2,570 allowance
- At £125,140: Reduced to £0
What Happens to the Personal Allowance at £125,140?
When your adjusted net income reaches £125,140, your Personal Allowance is fully tapered to £0. At this point, all of your income above the remaining allowance is subject to Income Tax at the applicable rates.
What Is Adjusted Net Income?
Adjusted net income is your total taxable income minus certain deductions such as pension contributions and grossed-up Gift Aid donations. It is used to determine whether the Personal Allowance taper applies. This calculator uses a simplified estimate of adjusted net income.
Do Pension Contributions Affect the Personal Allowance?
Yes, pension contributions can reduce your adjusted net income, which may help protect your Personal Allowance if you earn above £100,000. However, the effect depends on the pension arrangement (salary sacrifice, net pay, or relief at source). This calculator provides a simplified estimate.
Does Gift Aid Affect the Personal Allowance?
Yes, qualifying Gift Aid donations can reduce your adjusted net income. The donation is grossed up by 25% for the calculation. For example, a £100 donation becomes £125 for adjusted net income purposes.
Is Salary Completely Tax Free Up to the Personal Allowance?
Generally, yes — income up to your Personal Allowance is tax-free. However, this assumes you have no other income that affects your allowance and that your tax code correctly applies the allowance through PAYE. Special circumstances, tax-code adjustments and other income can affect this.
Does Everyone Get the Full Personal Allowance?
No. The full Personal Allowance is available to most people, but it is reduced if adjusted net income exceeds £100,000. Some individuals may also have a reduced allowance due to other adjustments, benefits or tax-code changes.
What If I Earn More Than £100,000?
If your adjusted net income exceeds £100,000, your Personal Allowance starts to taper. You lose £1 of allowance for every £2 of income above £100,000. This continues until your allowance reaches £0 at £125,140.
What If I Have Multiple Income Sources?
Your total income from all sources is combined when determining your Personal Allowance. Multiple income sources may affect your adjusted net income and whether the taper applies.
UK Tax-Free Income Examples
Example 1 — Income Below £100,000
Annual Income: £50,000 • 2026/27 • No pension • No Gift Aid
Total Income£50,000.00
Standard Personal Allowance£12,570.00
Estimated Personal Allowance£12,570.00
Allowance Reduction£0.00
Taxable Income£37,430.00
StatusFull Personal Allowance
Monthly Tax-Free£1,047.50
Tax-Free Percentage25.1%
Example 2 — Income Around the Taper
Annual Income: £110,000 • 2026/27 • No pension • No Gift Aid
Total Income£110,000.00
Standard Personal Allowance£12,570.00
Estimated Personal Allowance£7,570.00
Allowance Reduction£5,000.00
Taxable Income£102,430.00
StatusReduced Personal Allowance
Monthly Tax-Free£630.83
Tax-Free Percentage6.9%
Example 3 — Income at Full Taper
Annual Income: £125,140 • 2026/27 • No pension • No Gift Aid
Total Income£125,140.00
Standard Personal Allowance£12,570.00
Estimated Personal Allowance£0.00
Allowance Reduction£12,570.00
Taxable Income£125,140.00
StatusPersonal Allowance Fully Tapered
Monthly Tax-Free£0.00
Tax-Free Percentage0%
Illustrative examples only. Actual results may vary based on personal circumstances.
Limitations of This Tax-Free Calculator
- This is a simplified estimate, not a complete adjusted-net-income calculation.
- It does not account for all possible adjustments, reliefs or income categories.
- Pension tax treatment varies by scheme (salary sacrifice, net pay, relief at source).
- Gift Aid treatment depends on qualifying donations and personal circumstances.
- Tax codes and PAYE adjustments are not calculated here.
- Scottish Income Tax rates are not addressed in this Personal Allowance estimate.
- State benefits and special income may affect the calculation differently.
- Tax rules can change and may differ from the simplified model.
Frequently Asked Questions
1. How much income is tax free in the UK?
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For 2026/27, the standard tax-free amount is £12,570, known as the Personal Allowance. This can be reduced if your adjusted net income exceeds £100,000.
2. What is the UK Personal Allowance?
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The Personal Allowance is the amount of income you can earn before you start paying Income Tax. For 2026/27, it is £12,570. It is automatically applied through PAYE for most employees.
3. Does everyone get the £12,570 Personal Allowance?
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Most people get the full allowance, but it can be reduced if adjusted net income exceeds £100,000. Some individuals may also have tax-code adjustments that affect the allowance.
4. What happens if I earn more than £100,000?
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If your adjusted net income exceeds £100,000, your Personal Allowance is reduced by £1 for every £2 of income above £100,000. This continues until the allowance reaches £0 at £125,140.
5. At what income does the Personal Allowance become zero?
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The Personal Allowance is reduced to £0 when adjusted net income reaches £125,140. This is calculated as £100,000 + (£12,570 × 2) = £125,140.
6. Do pension contributions affect my Personal Allowance?
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Yes, pension contributions can reduce your adjusted net income, which may help protect your Personal Allowance if you earn above £100,000. The effect depends on the pension arrangement.
7. Does Gift Aid affect my Personal Allowance?
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Yes, qualifying Gift Aid donations are grossed up by 25% and can reduce your adjusted net income, which may affect your Personal Allowance if you are near the taper threshold.
8. Is my entire salary below the Personal Allowance tax free?
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Generally, yes — income up to your Personal Allowance is tax-free. However, this assumes you have no other income affecting your allowance and that your tax code is correct.
9. Does the tax-free allowance change by tax year?
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Yes, the Personal Allowance can change from year to year. The current standard allowance for 2026/27 is £12,570. Previous tax years may have different allowances and thresholds.
10. Is this an official HMRC calculator?
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No, this calculator provides estimates only and is not an official HMRC calculator. It is designed to help you understand the Personal Allowance and the £100,000 taper, but your actual tax position may differ based on personal circumstances.
⚠️ Important: This calculator provides an estimate based on simplified UK Personal Allowance rules. It is not tax advice and is not an official HMRC calculator. Actual tax treatment can differ. Adjusted net income can involve additional factors. Pension arrangements differ. Gift Aid treatment can vary. Tax codes are not calculated here. Scottish taxpayers can have different Income Tax rates. Other allowances and reliefs may apply. State benefits and special income may affect calculations. Tax rules can change. Complex circumstances should be checked with an appropriately qualified professional.
Related Calculators
For a broader range of tax calculations, you may also find SmartTaxCalculator.com a useful resource for exploring different tax scenarios.