Tax Code 580T Explained
T code: the number gives about £5,800 of tax-free income from this job or pension, and the T means other calculations work out your Personal Allowance.
At a glance — 580T
- Personal Allowance
- £5,800
- Region
- UK-wide (rUK / Wales)
- Cumulative?
- Yes
- Code type
- T suffix (other calculations)
What does 580T mean?
Your tax code includes other calculations to work out your Personal Allowance.
The number in your code gives you £5,800 of tax-free income from this job or pension in the tax year.
How much tax will you pay on 580T?
Annual income tax HMRC would deduct on 2026-27 rates for a range of salaries, assuming the full year on this code. National Insurance is additional and the same across the UK.
| Annual salary | England / Wales / NI — income tax | Effective rate | Take-home (pre-NI) |
|---|---|---|---|
| £20,000 | £2,840 | 14.2% | £17,160 |
| £30,000 | £4,840 | 16.1% | £25,160 |
| £50,000 | £10,140 | 20.3% | £39,860 |
| £80,000 | £22,140 | 27.7% | £57,860 |
| £100,000 | £30,140 | 30.1% | £69,860 |
For Scottish / rUK side-by-side, or to model your own salary, student loan and pension contributions, use the tax code checker.
What you'll actually pay vs the standard code
580T compared with 1257L — the standard code most single-job employees with no adjustments are on — at the same salary, 2026-27 rates.
| Annual salary | 580T tax | 1257L tax | Difference |
|---|---|---|---|
| £30,000 | £4,840 | £3,486 | +£1,354 |
| £50,000 | £10,140 | £7,486 | +£2,654 |
| £80,000 | £22,140 | £19,432 | +£2,708 |
Should you be on tax code 580T?
How to fix it if 580T is wrong
- Check your current code in the HMRC app, your Personal Tax Account, or your latest P2 coding notice or payslip.
- New job with no P45? Ask your employer for a Starter Checklist — completing it correctly is what moves you off a temporary code.
- Not sure what your P45 figures mean, or already overpaid? See the P45 box-by-box guide to decode what your employer reported, or run the tax refund estimator to check what you might be owed.
- If HMRC agrees your code was wrong, most in-year corrections refund automatically through payroll; larger over- or underpayments are settled via a P800 calculation after the tax year ends.
Related tax codes
0T — No Allowance
No Personal Allowance: your allowance is used up, or your employer lacks the details to give you a code. All pay is taxed through the normal bands.
1257L — Standard
The default HMRC tax code for most UK employees — gives you the full £12,570 tax-free Personal Allowance.
S1257L — Scottish Standard
The Scottish version of the standard code. Same £12,570 allowance, but Scottish tax bands (19% / 20% / 21% / 42% / 45% / 48%) apply.
C1257L — Welsh Standard
The Welsh version of the standard code. Full £12,570 allowance with Welsh (rUK-aligned) rates.
FAQ
What does tax code 580T mean?
How much tax will I pay on tax code 580T?
Check your own code: enter any HMRC tax code into the free tax code checker — it decodes the letters and number, shows your Personal Allowance, and estimates your take-home using 2025-26 or 2026-27 rates.
For the full plain-English guide to every UK tax code letter, prefix and suffix, see UK Tax Codes Explained 2026-27.
Sources
Tax code rules from gov.uk/tax-codes. Income tax rates from HMRC. Effective tax figures computed live from central configuration — correct for 2026-27.