Tax Code S0T Explained

What does S0T mean?

S0T marks you as a Scottish taxpayer for the 2026/27 year. The personal-allowance logic is identical to the rUK version of 0T — the number still represents your tax-free amount, the letter still describes any allowance adjustment — but Holyrood (not Westminster) sets the rates above the allowance. The 2026/27 Scottish bands are: 19% starter rate on the first slice above your allowance, 20% basic rate, 21% intermediate rate, 42% higher rate, 45% advanced rate and 48% top rate above £125,140. HMRC determines residency from your main home, not your employer's location, so a Scotland-based employee at a London-headquartered firm will still be issued an S code. National Insurance is unaffected and continues to use UK-wide thresholds. 0T (zero-T) tells your employer to apply no personal allowance at all, but unlike BR it still steps you through the normal tax bands: 20% on the first £37,700 of taxable pay, 40% from £37,700 to £125,140, and 45% above that. Because the £12,570 personal allowance has been removed entirely, every pound of pay is taxable from the very first payslip. 0T is most often used as an emergency code when HMRC does not yet have enough information to issue a proper cumulative code — for example when a new starter cannot supply a P45 and does not complete a starter checklist, or when a leaver receives a final payment after their P45 has been issued. It is also commonly used for non-resident directors, lump-sum redundancy payments above the £30,000 exempt limit, and certain share-scheme payouts. Compared with BR (a flat 20% with no allowance), 0T is harsher for higher earners because it uses the higher- and additional-rate bands too. The good news is that 0T is almost always temporary: once HMRC reconciles your year-to-date pay, they will replace it with a cumulative code and refund any overpaid tax automatically through your next payslip.

Breakdown of the code

• S

  S

  Scottish prefix — you live in Scotland and pay Scottish income-tax rates (19% / 20% / 21% / 42% / 45% / 48%).

• 0

  Number

  Zero personal allowance.

• T

  Letter

  Items in your tax affairs require HMRC review — used here to mark a temporary zero-allowance state.

Worked example

New starter who lost their P45 on £30,000 (paid monthly).

£500/month income tax — roughly £2,514/year more than 1257L.

Who should be on S0T?

• Scottish residents whose main home address is in Scotland
• New starters with no P45 who did not complete a starter checklist
• Final payments made after a P45 has been issued
• Non-resident directors and one-off share-scheme payouts
• Redundancy payments above the £30,000 exempt threshold

Common problems

• It feels punitive — you lose the allowance entirely until a cumulative code is reissued.
• High earners can be pushed into 40% or 45% per pay period without any smoothing.
• A delayed FPS submission keeps you on 0T longer than necessary.

What to do if S0T looks wrong

1. Provide your employer with a P45 from your previous job, or complete a starter checklist accurately (Statement A, B or C).
2. Wait one or two pay cycles — most emergency codes auto-correct as soon as HMRC receives the first FPS submission from your new employer.
3. If the code persists into a third payslip, sign in to your personal tax account and confirm both employments are listed correctly.
4. Phone HMRC on 0300 200 3300 quoting the date you started and the date your last job ended — they can issue a cumulative P9 the same day.
5. Once a cumulative code is reissued, any overpaid tax is refunded automatically through your next payslip.

If you should be on a different code…

Quick decision tree — when S0T is the wrong fit, here is the most likely correct code.

• If you have moved out of Scotland — you should be on 0T.

  No personal allowance. All income taxed via the normal 20% / 40% / 45% bands.