Understanding the Personal Allowance and How It Affects Your Income
What is the UK Personal Allowance? Learn how it determines your tax-free income, changes for high earners, and ways to maximise it through tax planning.
Most UK taxpayers are entitled to earn a certain amount of money each year without paying any Income Tax. This is called the Personal Allowance. At the time of writing, the standard Personal Allowance is £12,570 for the 2026/27 tax year. At the time of writing, it remains frozen at £12,570.
Understanding how the Personal Allowance works is essential for managing your tax affairs. It affects your tax code, your take-home pay, and your overall tax bill. If you know how it works, you can make better financial decisions and potentially pay less tax.
This guide explains what the Personal Allowance is, who qualifies for it, when it can be reduced, and how you can make the most of it through tax planning strategies such as pension contributions, Gift Aid, and Marriage Allowance.
For a broader overview of the UK tax system, our UK tax brackets guide explains how the rates and thresholds work together. If you are interested in how the Personal Allowance interacts with other reliefs, our adjusted net income guide covers the calculations in detail.
The Personal Allowance is the amount of income you can earn before paying Income Tax. At the time of writing, the standard allowance is £12,570. It is reduced if your income exceeds £100,000.
What Is the Personal Allowance
The Personal Allowance is the amount of taxable income you can earn each year before you have to pay any Income Tax. It is the government's way of ensuring that people on low incomes do not pay tax on their earnings.
For the 2026/27 tax year, the standard Personal Allowance is £12,570. This means that if you earn £12,570 or less in a tax year, you will pay no Income Tax at all. If you earn more than this, you will only pay tax on the income above £12,570.
Your tax code is directly linked to your Personal Allowance. For example, the standard tax code 1257L means that you are entitled to the full Personal Allowance of £12,570. The number 1257 represents your allowance with the last digit removed, and the letter L means you are entitled to the standard allowance.
Most employees on straightforward tax affairs will have the 1257L tax code. However, if your circumstances change, your tax code may be adjusted to reflect a different Personal Allowance.
Our 1257L tax code guide explains the most common tax code in detail.
The Personal Allowance is the foundation of the UK Income Tax system. It determines how much of your income is tax-free and is reflected in your tax code.
How the Personal Allowance Affects Your Take-Home Pay
Under the PAYE system, your employer uses your tax code to calculate how much tax-free income you should receive in each pay period. Your Personal Allowance is divided across the tax year, so if you are paid monthly, you receive £1,047.50 tax-free each month.
The Personal Allowance is the first band of income that is taxed at 0%. Once your income exceeds this amount, the remaining income is taxed at the applicable rates. The Income Tax bands for England, Wales, and Northern Ireland are set out below.
| Band | Income Range | Tax Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Basic Rate | £12,571 – £50,270 | 20% |
| Higher Rate | £50,271 – £125,140 | 40% |
| Additional Rate | Above £125,140 | 45% |
For example, if you earn £30,000 a year, the first £12,570 is tax-free. The remaining £17,430 is taxed at 20%, which gives you a tax bill of £3,486.
Use our Income Tax Calculator to see your own figures.
For a deeper understanding of how additional income is taxed, our marginal tax rate guide explains the impact on your overall tax position.
The Personal Allowance gives you £12,570 of tax-free income. Income above this is taxed at 20%, 40%, or 45% depending on how much you earn.
When the Personal Allowance Is Reduced
The Personal Allowance is gradually reduced for higher earners whose income exceeds £100,000. This is sometimes called the personal allowance taper.
For every £2 of income above £100,000, your Personal Allowance is reduced by £1. This means that by the time your income reaches £125,140, your Personal Allowance has been reduced to zero.
This taper creates an effective tax rate of 60% on income between £100,000 and £125,140. This is because the additional income is taxed at 40% and also causes the loss of Personal Allowance, which effectively adds another 20% tax.
For example, if your income is £110,000, your Personal Allowance is reduced by £5,000 (half of the £10,000 above £100,000). This leaves you with a Personal Allowance of £7,570. The £5,000 reduction in your allowance effectively costs you £2,000 in extra tax at 40%.
There are ways to reduce the impact of the taper. Making pension contributions or Gift Aid donations can reduce your taxable income and help preserve your Personal Allowance. If you are affected by the taper, it is worth considering these strategies.
Our pension relief calculator can help you understand how pension contributions affect your tax position.
The Personal Allowance is reduced by £1 for every £2 earned above £100,000. Above £125,140, the allowance is zero. Pension contributions and Gift Aid can help restore it.
Special Allowances: Marriage Allowance and Blind Person's Allowance
In addition to the standard Personal Allowance, there are two special allowances that can increase your tax-free amount.
Marriage Allowance allows you to transfer £1,260 of your Personal Allowance to your spouse or civil partner. To qualify, you must be married or in a civil partnership, one partner must earn below the Personal Allowance, and the other partner must be a basic rate taxpayer.
The transfer can save the receiving partner up to £252 in tax per year. The partner with the lower income gives up part of their allowance, and the higher earner receives it. This reduces the overall tax bill for the couple.
You can apply for Marriage Allowance online through the GOV.UK website. Once claimed, it continues automatically unless your circumstances change.
Blind Person's Allowance is an additional allowance for people who are registered blind or severely sight impaired. At the time of writing, Blind Person's Allowance is £3,070. Check GOV.UK for the latest rates. If you qualify, your total tax-free amount increases to £15,640.
You must be registered with your local council as blind or severely sight impaired to claim this allowance.
For more on tax codes and allowances, our list of tax codes and what they mean covers all the variations.
Marriage Allowance lets you transfer £1,260 of unused allowance to your spouse, saving up to £252. Blind Person's Allowance adds to your tax-free amount. Check GOV.UK for current rates.
Personal Allowance for the Self-Employed
The Personal Allowance applies to everyone, including the self-employed. If you complete a Self Assessment tax return, your Personal Allowance is deducted from your total income before your tax liability is calculated.
As a self-employed individual, you can also reduce your taxable income by claiming allowable business expenses and making pension contributions. These deductions reduce your taxable profits, which can help you stay within the Personal Allowance or avoid moving into a higher tax band.
You can also transfer part of your allowance through Marriage Allowance if you are eligible. This can be particularly useful if your self-employment income is low and your spouse or civil partner is a basic rate taxpayer.
Our self-employed tax calculator can help you estimate your tax based on your profits and Personal Allowance.
The Personal Allowance applies to everyone, including the self-employed. It is deducted from your total income before tax is calculated.
Tax Codes and the Personal Allowance
Your tax code directly reflects your Personal Allowance. If your Personal Allowance is reduced or increased, your tax code will change accordingly.
| Code | Meaning |
|---|---|
| 1257L | Standard Personal Allowance of £12,570 |
| 0T | No allowance applied (often temporary) |
| BR | All income taxed at 20% (second job) |
| D0 | All income taxed at 40% (higher rate) |
| NT | No tax deducted |
| M/N | Marriage Allowance codes (received or transferred) |
If your tax code does not match your circumstances, you may be paying the wrong amount of tax. You can check your tax code on your payslip or through your HMRC Personal Tax Account.
Our how to check and correct your HMRC tax code guide explains the process step by step.
Your tax code reflects your Personal Allowance. If your code is wrong, you may be overpaying or underpaying tax. Check it regularly.
How to Check If You're Using the Right Personal Allowance
It is important to check that your Personal Allowance is being applied correctly. If it is not, you may be paying too much or too little tax.
Step 1: Find your tax code on your payslip. This is usually displayed near your National Insurance number. The most common code for most employees is 1257L.
Step 2: Compare your tax code to what you expect. If you have a standard Personal Allowance and no significant adjustments, you should see 1257L. If your code is different, there may be a reason such as a company car, Marriage Allowance, or an adjustment for underpaid tax.
Step 3: Log into your HMRC Personal Tax Account. This will show you a breakdown of how your tax code was calculated. You can see your Personal Allowance, any additions, and any deductions.
Step 4: If your details are incorrect, update HMRC. This is particularly important if you have changed jobs, received new benefits, or started a second income stream.
Use our Income Tax Calculator to estimate whether your deductions look right.
If your tax code has changed suddenly, our guide to sudden tax code changes explains the common triggers.
Check your tax code on your payslip or in your HMRC Personal Tax Account. If your code does not match your circumstances, contact HMRC.
Strategies to Make the Most of Your Personal Allowance
There are several strategies you can use to make the most of your Personal Allowance and reduce your overall tax bill.
| Strategy | Description | Example Benefit |
|---|---|---|
| Use Marriage Allowance | Transfer £1,260 of unused allowance to your partner | Save up to £252 per year |
| Top up pensions | Reduce taxable income below £100k to preserve allowance | Save up to £5,000+ in tax |
| Gift Aid donations | Extend allowance and reduce effective rate | Double benefit if higher-rate |
| Invest tax-efficiently | ISAs and certain bonds generate tax-free returns | Keep savings interest untaxed |
| Claim all expenses | For self-employed or employees with work costs | Reduce taxable profit/income |
Pension contributions are one of the most effective ways to reduce your taxable income. For higher earners affected by the Personal Allowance taper, a pension contribution can preserve your allowance and save tax at 60%.
Gift Aid donations also reduce your taxable income. If you are a higher or additional rate taxpayer, you can claim the difference between the basic rate relief already claimed by the charity and your marginal rate through Self Assessment.
Using ISAs can protect your savings and investment income from tax. Interest and gains within ISAs are completely tax-free and do not count towards your Personal Allowance.
For more on tax planning, our alternative retirement plan guide covers strategies that can also help with income tax planning.
Use Marriage Allowance, pension contributions, Gift Aid, ISAs, and allowable expenses to make the most of your Personal Allowance.
Common Problems and Fixes
Several common issues can arise with the Personal Allowance. Understanding these problems and their solutions can help you avoid overpaying or underpaying tax.
| Issue | Likely Cause | Fix |
|---|---|---|
| Wrong tax code (not 1257L) | HMRC data not updated | Check via your HMRC account |
| Allowance reduced unexpectedly | Income over £100k | Increase pension or Gift Aid |
| Partner not receiving Marriage Allowance | Eligibility changed or claim not processed correctly | Reapply online or update HMRC |
| Employer applied wrong code | New job / missing P45 | Provide documents to payroll |
| Self Assessment still shows old figures | Not updated online | Amend your return or call HMRC |
If you have overpaid tax due to the wrong Personal Allowance, our what to do if you've been taxed too much guide explains how to claim a refund.
Common issues include wrong tax codes, unexpected allowance reductions, and Marriage Allowance not being applied. Most can be fixed by updating HMRC.
Worked Example
Sarah earns £38,000 as an employee. Her Personal Allowance is £12,570, so her taxable income is £25,430. She pays 20% tax on this, giving her a tax bill of £5,086.
Her tax code is 1257L.
If Sarah contributes £2,000 to a pension, her taxable income drops to £36,000. Her tax bill then becomes £4,686, saving her £400. This assumes the pension contribution is made through a net pay arrangement or relief at source, where basic rate tax relief is applied.
If Sarah's income were £110,000, her Personal Allowance would be reduced by £5,000 to £7,570. Her tax bill would be higher as a result. If she contributed to a pension to reduce her income below £100,000, she would restore her full Personal Allowance and save tax at the effective rate of 60%.
Our Income Tax Calculator can help you see the impact of pension contributions on your own tax bill.
A £2,000 pension contribution can save a basic rate taxpayer £400 in Income Tax. Pension contributions also help preserve the Personal Allowance for higher earners.
Final Thoughts
The Personal Allowance is the foundation of the UK Income Tax system. It gives you £12,570 of tax-free income each year, which is reflected in your tax code. For most people, the standard 1257L code applies.
However, the allowance is reduced if you earn over £100,000, creating an effective tax rate of 60% in the £100,000 to £125,140 band. Pension contributions and Gift Aid donations can help reduce your taxable income and preserve your allowance.
Special allowances such as Marriage Allowance and Blind Person's Allowance can also increase your tax-free amount. Check your eligibility and apply through your HMRC Personal Tax Account.
Use our Income Tax Calculator to see how your Personal Allowance affects your take-home pay, and check your tax code regularly to ensure you are paying the correct amount.
All information in this guide is based on official HMRC and GOV.UK sources. Readers should verify their Personal Allowance through their HMRC Personal Tax Account before making financial decisions, as individual circumstances vary and rules may change after publication.
Written by
Mia Carragher
Mia writes beginner-friendly UK tax and personal finance guides, with a focus on income tax, National Insurance, salary calculators and simple HMRC explainers.
See more from Mia Carragher