What does an S prefix on a tax code mean?

Per gov.uk, the S prefix on a UK tax code (for example S1257L) means you are treated as a Scottish taxpayer for the year. Your employer applies Scottish income tax bands set by the Scottish Parliament instead of the rUK bands. The personal allowance is still £12,570 across the UK.

How does HMRC decide if I am a Scottish taxpayer?

Per HMRC, your residency status for Scottish tax is based on where your main home is located across the tax year — not where your employer is based, and not where you happen to be on any one day. If your main residence is in Scotland for the majority of the year, you are a Scottish taxpayer and the S prefix should appear on your code.

What are the Scottish tax bands for 2026/27?

For 2026/27 the Scottish income tax bands (estimate, subject to confirmation by the Scottish Parliament) typically include: Starter rate 19%, Basic rate 20%, Intermediate rate 21%, Higher rate 42%, Advanced rate 45%, Top rate 48%. The exact thresholds are published each year in the Scottish Budget — check gov.scot or the HMRC scheduled rates page before relying on a specific number.

I have moved to Scotland — when does my code change?

Update your address with HMRC in your personal tax account. HMRC then assesses your Scottish taxpayer status from your records and will issue an S-prefix code if you qualify. Until the new code reaches your employer, payroll continues using the existing one — any over- or under-paid tax is reconciled in-year or via a P800.

Do Scottish taxpayers still get the £12,570 personal allowance?

Yes. The personal allowance is set by the UK Government and applies across the UK — including Scotland. The Scottish Parliament sets the rates and bands above the allowance, so the £12,570 tax-free figure is unchanged. The S1257L code reflects this: £12,570 allowance + Scottish bands above it.

Educational guidance only — not regulated tax, financial or payroll advice. Scottish income tax bands are set annually by the Scottish Parliament; figures below are illustrative for 2026/27 and should be verified against gov.scot or HMRC before acting.

UK · Tax codes · S

Tax code S — Scottish income tax bands apply

If your tax code starts with S (for example S1257L), HMRC has classified you as a Scottish taxpayer for 2026/27. Your employer applies Scottish income tax bands — set by the Scottish Parliament — to the part of your pay above the personal allowance. The £12,570 personal allowance itself is a UK-wide figure, unchanged by the S prefix.

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What this code means

Per gov.uk's Scottish-tax guidance, the S prefix is the payroll mechanism that tells your employer to apply Scottish income tax bands to your taxable pay rather than the bands used in England, Wales and Northern Ireland (rUK). The personal allowance, dividend allowance, savings allowance and overall UK-wide rules on capital gains and National Insurance are unchanged — only the income tax bands and rates above the allowance differ.

For 2026/27, Scottish income tax has six bands (estimate, to be confirmed by the Scottish Parliament): Starter rate 19% on a narrow slice above the allowance, Basic rate 20%, Intermediate rate 21%, Higher rate 42%, Advanced rate 45%, and Top rate 48%. Compared to the rUK three-band structure (20% / 40% / 45%), the Scottish ladder is finer-grained and the higher-end rates currently sit a few percentage points above their rUK equivalents. The Scottish Parliament publishes the precise thresholds in its annual Budget; always verify against gov.scot before relying on a specific figure.

S = Scottish taxpayer. Bands above the allowance follow Scottish Parliament rates.
Personal allowance unchanged. Still £12,570 — set by the UK Government.
National Insurance unchanged. NI rates and thresholds are UK-wide.

Who gets an S-prefix code

Per HMRC, the S prefix attaches to a code based on Scottish taxpayer status, which itself depends on where your main home is located across the year. The most common scenarios are below.

Your main home is in Scotland for most of the tax year: Per HMRC's Scottish-taxpayer test, residency is decided by where your main residence sits across the year, not by where your employer is based. If your main home is in Scotland for more than half the tax year, HMRC will normally apply the S prefix and the Scottish bands.
You moved to Scotland during the tax year: A mid-year move triggers HMRC to reassess residency. If you spend the larger part of the year in Scotland after the move, the S prefix is normally applied. Update your address in the HMRC personal tax account as soon as you move.
You have a Scottish address on HMRC record: HMRC looks at the postal address on file as a strong signal. If your tax record shows a Scottish address but you have moved, update it — otherwise S can apply incorrectly. Equally, leaving Scotland without updating HMRC can keep S in place too long.
Your employer is in Scotland but you live elsewhere: This is not a Scottish-taxpayer trigger. The S prefix follows the employee's residency, not the employer's. Per HMRC, you do not get the S prefix just because your office is in Edinburgh or Glasgow.
HMRC has made a residency determination after a review: For complex cases (regular travel for work, multiple homes, partial UK residency) HMRC may issue a formal determination of Scottish taxpayer status. The S prefix then applies until circumstances change.

Worked example — £30,000 gross on S1257L (estimate)

£30,000 gross salary in 2026/27. Personal allowance £12,570 leaves £17,430 taxable. The Scottish bands then apply (estimate, to be confirmed by the Scottish Parliament):

Band (Scottish, 2026/27 estimate)	Taxable in band	Tax
Starter 19% (first £2,306)	£2,306	£438.14
Basic 20% (next £12,140)	£12,140	£2,428.00
Intermediate 21% (next £2,984)	£2,984	£626.64
Total Scottish PAYE on £30,000	£17,430	≈£3,493 (estimate)

That is a few pounds different from the rUK 1257L result of £3,486, because the Scottish starter rate of 19% on the first slice is slightly lower than the basic rate but the intermediate-rate slice at 21% is slightly higher. At higher incomes the gap widens — for example a £60,000 earner pays noticeably more under the Scottish higher rate (42%) than under the rUK higher rate (40%). Verify against the Scottish Budget tables before quoting a number for your own pay.

Common mistakes & red flags

S prefix after moving out of Scotland. HMRC has not updated your record — log into the personal tax account and change your address.
No S prefix after moving to Scotland. You may be paying rUK rates by default. Update your address with HMRC.
S applied because of employer location. The S prefix follows the employee, not the employer. If the only reason is “my office is in Edinburgh”, the code may be wrong.
Mixed prefixes across employments. If one job has S and another does not, only one can be correct — usually whichever matches your main residence.

What to ask payroll

“Which HMRC coding notice set the S prefix?”
“Is my address on file the one I used when I started?”
“Are Scottish bands being applied at the right thresholds for this tax year?”
“If HMRC changes the prefix mid-year, will the in-year refund process through payroll?”
“Can you confirm year-to-date pay and PAYE?”

How to fix it if the S prefix looks wrong

Update your address with HMRC. Sign in to your HMRC personal tax account and check your address and residency.
Tell HMRC about a move. If you have moved into or out of Scotland, complete the change-of-address notification.
Wait for a new code. HMRC reissues with or without the S prefix as appropriate.
Refund through payroll. Once the cumulative code with the correct prefix applies, any over-paid tax is refunded in the next pay run.

Frequently asked questions

What does an S prefix on a tax code mean?: Per gov.uk, the S prefix on a UK tax code (for example S1257L) means you are treated as a Scottish taxpayer for the year. Your employer applies Scottish income tax bands set by the Scottish Parliament instead of the rUK bands. The personal allowance is still £12,570 across the UK.
How does HMRC decide if I am a Scottish taxpayer?: Per HMRC, your residency status for Scottish tax is based on where your main home is located across the tax year — not where your employer is based, and not where you happen to be on any one day. If your main residence is in Scotland for the majority of the year, you are a Scottish taxpayer and the S prefix should appear on your code.
What are the Scottish tax bands for 2026/27?: For 2026/27 the Scottish income tax bands (estimate, subject to confirmation by the Scottish Parliament) typically include: Starter rate 19%, Basic rate 20%, Intermediate rate 21%, Higher rate 42%, Advanced rate 45%, Top rate 48%. The exact thresholds are published each year in the Scottish Budget — check gov.scot or the HMRC scheduled rates page before relying on a specific number.
I have moved to Scotland — when does my code change?: Update your address with HMRC in your personal tax account. HMRC then assesses your Scottish taxpayer status from your records and will issue an S-prefix code if you qualify. Until the new code reaches your employer, payroll continues using the existing one — any over- or under-paid tax is reconciled in-year or via a P800.
Do Scottish taxpayers still get the £12,570 personal allowance?: Yes. The personal allowance is set by the UK Government and applies across the UK — including Scotland. The Scottish Parliament sets the rates and bands above the allowance, so the £12,570 tax-free figure is unchanged. The S1257L code reflects this: £12,570 allowance + Scottish bands above it.

Tax code C — Welsh income tax
The sister prefix for Welsh taxpayers.
Tax code 1257L — standard allowance
The non-prefixed equivalent.
Tax code BR — flat 20%
May appear as SBR for Scottish second jobs.
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Last reviewed

Last reviewed: 16 May 2026

Next review: 6 April 2027

Reviewed each tax year and sooner if the Scottish Parliament revises bands or rates.

Educational guidance only — not regulated tax, financial or payroll advice. Verify Scottish bands against gov.scot before acting. To run a real check, the wrong-tax-code checker is the place to begin.