UK Personal Tax Allowance 2025/26 Calculator
Use this tool to estimate your personal allowance for the 2025/26 tax year (6 April 2025 to 5 April 2026), based on adjusted net income rules used in England, Wales, and Northern Ireland.
This is an educational estimate and does not include National Insurance, Scottish income tax bands, dividend tax, savings allowances, or every HMRC adjustment.
How the personal tax allowance works in 2025/26
The standard UK personal allowance for 2025/26 is £12,570. This is the amount of income most people can earn before paying income tax. For many employees, this is automatically built into their tax code through PAYE.
However, once income becomes high enough, your allowance can be reduced. That is why a dedicated personal tax allowance 2025 26 calculator is useful—it helps you see where your tax-free amount changes and by how much.
The £100,000 taper rule (very important)
If your adjusted net income is above £100,000, your personal allowance is reduced by £1 for every £2 over that level. In practical terms:
- At £100,000 adjusted net income: full allowance may still apply.
- Between £100,000 and £125,140: your allowance is gradually withdrawn.
- At £125,140 and above: standard personal allowance is usually reduced to £0.
This taper can create an effective marginal tax rate around 60% for part of your income, which surprises many people the first time they calculate it.
Adjusted net income: what to include
Adjusted net income is not always the same as your headline salary. It generally starts with total taxable income, then applies eligible deductions. In simplified terms, this calculator uses:
- Gross annual income
- Minus pension contributions that reduce adjusted net income
- Minus Gift Aid donations
That gives a practical estimate for allowance tapering. If your situation includes things like trading losses, salary sacrifice arrangements, or complex benefits, a personalised tax computation may differ.
Quick examples
Example 1: Income below taper zone
If income is £60,000 and no extra adjustments apply, personal allowance is usually still £12,570.
Example 2: Income inside taper zone
If adjusted net income is £110,000, the excess over £100,000 is £10,000. Allowance reduction is £5,000, so standard allowance becomes £7,570.
Example 3: Income above full withdrawal point
If adjusted net income is £130,000, the entire standard allowance is usually removed. You may still qualify for other specific allowances depending on circumstances, but the core personal allowance is typically £0.
Ways people legally manage allowance reduction
Many taxpayers close to £100,000 adjusted net income review planning options to preserve allowance where appropriate. Common strategies include:
- Increasing pension contributions
- Using Gift Aid donations
- Reviewing income timing where possible
- Checking coding notices and P60/P11D details for errors
None of these are “loopholes”—they are standard parts of the UK tax system. The key is to keep records and confirm how each step affects your actual tax position.
Frequently asked questions
Does this include National Insurance?
No. This calculator focuses on personal allowance and estimated income tax only.
Does it work for Scotland?
The personal allowance taper logic is still relevant, but Scottish income tax bands are different. Tax estimates here are based on England/Wales/Northern Ireland rates.
Can my allowance be more than £12,570?
Potentially yes, if you qualify for extra allowances (for example Blind Person’s Allowance). This tool includes an optional BPA toggle for that reason.
Bottom line
A reliable personal tax allowance 2025 26 calculator helps you understand how much of your income is tax free and when the high-income taper starts to bite. If your earnings are near or above £100,000, even small adjustments can make a meaningful difference to your effective tax rate.
For final filing, always check HMRC guidance or consult a qualified tax adviser.