UK Tax Code Checker 2026/27 Tax Year
Enter your tax code to see what it means, your tax-free allowance, and whether it looks right — instantly.
UK Tax Code Checker
Your tax code decides how much Income Tax is taken from your wages before you ever see the money. Get it wrong, and you could be paying too much tax every single payday — or building up a bill you’ll have to settle later. Use our UK Tax Code Checker to see what your code means, whether it matches your circumstances, and what to do next if something looks off.
What Is a Tax Code and Why It Matters
A tax code is a short string of numbers and letters — 1257L, BR, K475, and so on — that HMRC issues to your employer or pension provider. It tells them how much of your income is tax-free and how the rest should be taxed under PAYE (Pay As You Earn).
Most people never look at their tax code twice. That’s a mistake. HMRC bases your code on the information it has at the time, and that information isn’t always right. A change of job, a second income, a company benefit, or a simple admin error can all leave you on the wrong code — and it’s your responsibility to spot it, not HMRC’s.
How Do I Check My UK Tax Code?
There are a few places to find it:
- Your payslip – it’s usually printed near your National Insurance number.
- P45 or P60 – given to you when you leave a job or at the end of the tax year.
- PAYE Coding Notice (P2) – a letter HMRC sends when your code changes.
- Personal Tax Account or HMRC app – log in with your Government Gateway details to see your current code instantly.
Once you have it, run it through the checker above along with your salary. We’ll tell you what the code means in plain English and flag anything that looks out of step with your circumstances.
If you have more than one job or pension, check every code separately — each income source gets its own, and only one of them should carry your full tax-free personal allowance.
Is Tax Code 1257L Correct?
For the 2026/27 tax year, 1257L is the standard code for anyone with one job, no taxable work benefits, and total income under £100,000. It gives you a personal allowance of £12,570 — add a zero to the number in the code and that’s your tax-free amount for the year.
So if you tick all three boxes above — single employer, no perks like a company car, income below six figures — then yes, 1257L is correct for you.
It’s wrong for you if:
- You have a second job or pension (in that case, the second source is usually taxed under BR, D0, or a similar code, not 1257L).
- You receive benefits in kind, such as private medical insurance or a company car — these usually reduce your allowance and lower the number in your code.
- You earn over £100,000 — your personal allowance starts tapering away, so a different, lower number applies.
- You’ve recently changed job, retired, or started drawing a pension — the code may not have been updated yet.
The letter “L” simply confirms you’re getting the standard personal allowance. Other letters — BR, K, D0, D1, 0T, M, N — signal a different situation entirely, from a second income being taxed at a flat rate to a negative allowance because you owe tax from a previous year.
How Much Tax Do I Pay on a £57,000 Salary?
Based on 2026/27 rates, with the standard 1257L tax code and no other income, deductions, or pension contributions:
| Band | Amount | Rate | Tax |
|---|---|---|---|
| Personal Allowance | £12,570 | 0% | £0 |
| Basic Rate | £37,700 | 20% | £7,540 |
| Higher Rate | £6,730 | 40% | £2,692 |
| Total Income Tax | £10,232 |
On top of Income Tax, you’ll also pay Class 1 National Insurance:
| Band | Amount | Rate | NI |
|---|---|---|---|
| Up to £12,570 | £12,570 | 0% | £0 |
| £12,570–£50,270 | £37,700 | 8% | £3,016 |
| Above £50,270 | £6,730 | 2% | £134.60 |
| Total National Insurance | £3,150.60 |
Total deductions: £13,382.60 Take-home pay: roughly £43,617.40 a year, or around £3,635 a month before any pension contributions, student loan repayments, or other deductions.
A £57,000 salary pushes you just over £6,700 into the higher-rate (40%) band, so a small part of your pay — anything above £50,270 — is taxed at that higher rate.
What Age Do You Stop Paying National Insurance?
You stop paying National Insurance once you reach State Pension age, even if you carry on working. State Pension age is currently 66, and it’s rising to 67 for people born on or after 6 April 1960, with the change being phased in gradually between 2026 and 2028.
A few points worth knowing:
- The change is automatic through PAYE, but you’ll need to show your employer proof of your date of birth (a passport or birth certificate) so they stop deducting NI.
- Income Tax still applies after State Pension age if your income — including your State Pension — is above your personal allowance.
- Self-employed workers stop paying Class 4 NI from the start of the tax year after they reach State Pension age.
- Reaching State Pension age doesn’t force you to retire — there’s no default retirement age in the UK, so you can keep working for as long as you like.
What to Do If Your Tax Code Is Wrong?
If the checker or your own review suggests your code isn’t right:
- Contact HMRC through your Personal Tax Account, the HMRC app, or by phone.
- Ask for a review if you think you’ve overpaid — HMRC can issue a P800 and repay you, sometimes going back up to four tax years.
- Don’t ignore an underpayment — HMRC will usually collect what’s owed by adjusting your tax code over the following year, spreading the cost rather than asking for it all at once.
- Update HMRC whenever your circumstances change — new job, new benefit, second income, or retirement — to stop the same mistake happening again.
If your accounts and tax position feel more complicated than a quick code check can solve, our team at Micro Entity Accounts can look at your full picture and make sure you’re not leaving money on the table.
FAQs About UK Tax Code Checker
How do I check my UK tax code?
Look at your latest payslip, P45, P60, or PAYE Coding Notice, or log into your Personal Tax Account or the HMRC app. Enter the code and your salary into our checker above to see what it means and whether it looks correct for your situation.
Is tax code 1257L correct?
1257L is correct if you have one job, no taxable benefits, and earn under £100,000 a year. It gives you the standard £12,570 tax-free personal allowance for 2026/27. If you have a second income, company perks, or earnings over £100,000, a different code should usually apply.
What age do you stop paying National Insurance?
You stop paying National Insurance when you reach State Pension age, currently 66 and rising to 67 between 2026 and 2028. You can carry on working past this age and pay no NI, though Income Tax may still apply.
How much tax do I pay on a £57,000 salary?
Around £10,232 in Income Tax and £3,150.60 in National Insurance for 2026/27, leaving take-home pay of roughly £43,617 a year, based on the standard 1257L tax code with no other income or deductions.
What does the number in my tax code mean?
The number shows your tax-free personal allowance. Add a zero to it — so 1257 means you can earn £12,570 before tax is deducted.
What does the letter in my tax code mean?
The letter shows how your allowance is applied. L means the standard allowance applies. BR means all income from that job is taxed at the basic rate with no tax-free amount. K means you have a negative allowance, usually because you owe tax from a previous year or have benefits worth more than your allowance.
Why has my tax code changed?
Your code changes when your circumstances do — a new job, a pay rise that pushes you over £100,000, gaining or losing a company benefit, starting a pension, or HMRC correcting a previous error. You should get a P2 coding notice explaining the change.
Can I get a refund if my tax code was wrong?
Yes. If you’ve overpaid tax because of an incorrect code, HMRC can refund you, and you can typically claim back up to four previous tax years. Contact HMRC or check your Personal Tax Account to see if a repayment is due.
What happens if I don't pay enough tax because of a wrong code?
HMRC will usually adjust your tax code the following year to collect the shortfall gradually through your pay, rather than demanding a lump sum. Larger underpayments may come with a separate bill and a payment plan.
Do I still need a tax code if I'm self-employed?
Not usually. Tax codes apply to PAYE income from employment or a pension. If you’re fully self-employed, your tax is worked out through Self Assessment instead, and NI is paid as Class 2 and Class 4 contributions rather than being deducted from a payslip.