What does the tax code
S1257L mean?
S1257L is the standard code for Scottish taxpayers in 2026/27. The S prefix does not change your allowance. It changes which rates apply above it, and there are six of them.
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Get the detailed breakdown + free reclaim guideThe S in S1257L is not an adjustment. It is a jurisdiction. Your Personal Allowance is £12,570 for 2026/27, exactly the same as somebody on 1257L in Manchester, because the allowance is set by the UK government and applies across the whole country. What the S changes is the set of rates applied to everything above that allowance, and Scotland has six bands where the rest of the UK has three.
- S1257L Tax Code
- The standard tax code for a Scottish taxpayer in 2026/27. The S prefix tells your employer to use Scottish income tax rates. The 1257 gives the full £12,570 Personal Allowance and the L means the ordinary allowance rules apply. Scottish rates are set by the Scottish Parliament and apply to non-savings, non-dividend income such as wages and pensions.
What decides whether you get the S prefix
Not where you work, and not who employs you. The test is where your main residence is for most of the tax year. HMRC assigns Scottish taxpayer status from the address it holds for you, which is why the single most common cause of a wrong S code is an address that was never updated after a move.
You can live in Scotland and work for a company registered in London and still be a Scottish taxpayer. You can commute from Carlisle to Glasgow every day and not be one. The employer's location is irrelevant to the prefix.
If you have moved across the border in either direction and your code has not followed you, that is worth fixing quickly. It is one of the few coding errors where the amount at stake grows steadily with your salary rather than being a fixed sum.
The Scottish bands for 2026/27
| Band | Taxable income | Scottish rate | Equivalent rUK rate |
|---|---|---|---|
| Starter rate | £12,571 to £16,537 | 19% | 20% (basic) |
| Basic rate | £16,538 to £29,526 | 20% | 20% (basic) |
| Intermediate rate | £29,527 to £43,662 | 21% | 20% (basic) |
| Higher rate | £43,663 to £75,000 | 42% | 40% (higher) |
| Advanced rate | £75,001 to £125,140 | 45% | 40% (higher) |
| Top rate | Above £125,140 | 48% | 45% (additional) |
Two features of this table do most of the work. The starter rate is a penny in the pound cheaper than the rest of the UK, which is worth a fixed amount to everyone who earns enough to use it in full. And the higher rate begins at £43,663 rather than £50,270, which is where the real divergence starts.
Note also that the advanced rate band has no counterpart in the rest of the UK at all. It exists only in Scotland.
Worked example: S1257L on a £30,000 salary
- Gross salary: £30,000, allowance £12,570, so £17,430 is taxable
- Starter rate, 19% on the £3,967 from £12,571 to £16,537: £753.73
- Basic rate, 20% on the £12,989 from £16,538 to £29,526: £2,597.80
- Intermediate rate, 21% on the £474 from £29,527 to £30,000: £99.54
- Total Scottish income tax: £3,451.07
The same £30,000 on an rUK 1257L code produces £3,486.00, because all £17,430 is simply taxed at 20%. The Scottish taxpayer is about £35 better off at this income.
Worked example: S1257L on a £50,000 salary
- Starter, basic and intermediate rates up to £43,662: £6,320.09
- Higher rate, 42% on the £6,338 from £43,663 to £50,000: £2,661.96
- Total Scottish income tax: £8,982.05
The rUK figure is £7,486.00, all of it at 20%, because the rUK higher rate does not begin until £50,270. The Scottish taxpayer pays about £1,496 more.
All figures are income tax only, exclude National Insurance, which is identical across the UK, and are estimates to confirm with HMRC.
The crossover point
Below roughly £33,493 of total income, a Scottish taxpayer pays slightly less than someone on the equivalent rUK code. Above it, they pay more, and the gap widens sharply once income passes £43,662 and the 42% rate starts biting six and a half thousand pounds earlier than the rUK 40% rate would.
The arithmetic behind the crossover is worth understanding because it is stable. Below £29,526 a Scottish taxpayer is exactly £39.67 a year better off: one penny in the pound saved across the whole £3,967 starter rate band. From £29,527 upwards the intermediate rate charges an extra penny in the pound, which eats that £39.67 at a rate of £1 per £100 of income. £3,967 of intermediate-rate income later, at about £33,493, the advantage is gone.
What the S prefix does not change
This is where a lot of confusion sits, because "Scottish income tax" is much narrower than it sounds.
National Insurance is identical. NI is not devolved. A Scottish taxpayer on £50,000 pays exactly the same National Insurance as somebody on £50,000 in Leeds. Any comparison of take-home pay that ignores this overstates the gap.
The Personal Allowance is identical. It is set UK-wide and stands at £12,570 for 2026/27, frozen since 2021/22.
Savings and dividend income use UK rates. The Scottish Parliament's power covers non-savings, non-dividend income, which in practice means wages, pensions, self-employed profits and rental income. Interest and dividends are taxed at the same rates everywhere in the UK, whichever prefix your code carries. Someone with a large share portfolio and a modest salary is far less affected by the S prefix than their code suggests.
The £100,000 allowance taper is identical. The allowance falls by £1 for every £2 of income above £100,000 and reaches zero at £125,140, exactly as elsewhere. Because it interacts with the 45% advanced rate rather than the 40% higher rate, the effective marginal rate through that band is steeper in Scotland, but the taper rule itself is the same.
Tax relief on pension contributions works the same way, although the rate at which relief is ultimately given follows the Scottish bands.
When S1257L is wrong
You moved and HMRC still has the old address. The most common cause in both directions. Update your address in your Personal Tax Account and the prefix follows.
You get S1257L at two jobs. The prefix is right but the allowance is being given twice. Your second employment should normally carry SBR or a similar flat-rate Scottish code. This is expensive and HMRC will reclaim it.
You have the S prefix but live in Wales. The Welsh equivalent is the C prefix, covered on our C1257L page. Welsh rates currently match the rest of the UK, so the practical impact of confusing C and S is much larger than confusing C and no prefix at all.
The S is missing but you live in Scotland. You are being taxed at rUK rates. Below the crossover point that means you are slightly overpaying; above it, underpaying, and a bill will follow.
Putting a wrong prefix right
Update your address first, at gov.uk/personal-tax-account under "Check your Income Tax". Taxpayer status flows from the address record, so correcting the address is what actually fixes the code. Then confirm a new code has been issued and check that your employer has applied it on the next payslip.
If the prefix has been wrong for a full tax year or more, correcting it now does not settle the earlier years. Those are a separate exercise, and the general claim window is four years from the end of the tax year concerned. Our guide to reclaiming overpaid tax explains how that works, and our Scottish tax codes overview covers the full set of S-prefixed codes.
Run your numbers through the free tax code checker to see what your code should be under either jurisdiction. It produces an estimate, not advice.
People also ask
- S1257L gives the full £12,570 Personal Allowance, exactly the same as the rUK 1257L code
- The S prefix changes the rates above the allowance, not the allowance itself
- Scotland has six bands for 2026/27 running from a 19% starter rate to a 48% top rate
- Below about £33,493 a Scottish taxpayer pays slightly less than the rUK equivalent, and above it they pay more
- The gap widens sharply from £43,663, where the Scottish 42% rate starts more than £6,000 earlier than the rUK 40% rate
- The prefix is decided by where you live, not where you work, and follows the address HMRC holds
- Two employments both showing S1257L means your allowance is being given twice and HMRC will reclaim it
Related tax codes: Scottish tax codes | 1257L tax code | SBR tax code | S0T tax code | C1257L tax code
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