Tax Code 1383L Explained
Personal Allowance of £13,830 — higher than standard, typically reflecting Marriage Allowance transfer received plus another adjustment.
At a glance — 1383L
- Personal Allowance
- £13,830
- Region
- UK-wide (rUK / Wales)
- Cumulative?
- Yes
- Code type
- Standard L suffix
What does 1383L mean?
You are entitled to the standard tax-free Personal Allowance. This is the most common tax code suffix.
Your tax-free Personal Allowance is £13,830.
How much tax will you pay on 1383L?
Annual income tax HMRC would deduct on 2025-26 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 | £1,234 | 6.2% | £18,766 |
| £30,000 | £3,234 | 10.8% | £26,766 |
| £50,000 | £7,234 | 14.5% | £42,766 |
| £80,000 | £18,928 | 23.7% | £61,072 |
| £100,000 | £26,928 | 26.9% | £73,072 |
For Scottish / rUK side-by-side, or to model your own salary, student loan and pension contributions, use the tax code checker.
Should you be on tax code 1383L?
An L-suffix code with a number other than 1257 means your Personal Allowance has been adjusted up or down. Common reasons: unpaid tax from a previous year, small benefits in kind, Marriage Allowance (M / N suffixes instead), or company car/fuel benefit. Check your latest P2 coding notice to see exactly why.
Related tax codes
1185L — Reduced Allowance
Personal Allowance of £11,850 — below the standard £12,570, usually because of a small adjustment for unpaid tax or minor benefits.
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.
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 2025-26.