Tax Code SBR W1 Explained

What does SBR W1 mean?

SBR marks you as a Scottish taxpayer for the 2026/27 year. The personal-allowance logic is identical to the rUK version of BR - 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. SBR deducts the Scottish basic rate of 20% from every pound of pay from this source, with no tax-free allowance and no other band applied. HMRC's instruction for the code is simply to multiply the whole pay by 0.20. It normally appears on a second job or a pension running alongside a salary, because your £12,570 allowance has already been allocated to your main source of income, and in that position it is correct. It is wrong — and expensive — when it is applied to your only job, which usually traces back to a missing P45 or a Statement C tick on the starter checklist. The W1 suffix changes how the code is applied. Instead of recalculating against year-to-date earnings every payday (the normal cumulative method), payroll treats each pay period as a fresh start. You receive 1/52nd (W1), 1/12th (M1) or one slice (X) of your tax-free allowance and basic-rate band each period, and any unused allowance from earlier in the year is ignored. That stops a refund being issued before HMRC has confirmed your figures, but it can leave you slightly overpaid until a cumulative code is reissued. W1 codes are almost always temporary holding codes that resolve within one or two pay cycles after your first FPS submission reaches HMRC.

How W1, M1 and X emergency codes work

Breakdown of the code

• S

  S

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

• BR

  Letter pair

  Basic Rate - flat 20% (the Scottish basic rate) on every pound, with no tax-free allowance applied at this source.

• W1

  W1

  Non-cumulative weekly basis. Each pay period is treated independently - no smoothing across the year.

Worked example

Second job in Scotland - Saturday retail role on £8,000 (paid monthly).

£8,000 × 20% = £1,600/year. Correct because the £12,570 allowance is allocated to the main job.

Who should be on SBR W1?

• New starters who could not provide a P45 and completed a starter checklist
• Employees whose previous employer reported their leaver pay late
• People returning to PAYE after self-employment or working overseas
• Cases where HMRC has paused a cumulative calculation pending a record review

Common problems

• Bonuses and one-off payments are taxed harder than under a cumulative code because unused allowance from earlier months is ignored.
• The code persists for three or more months - usually a sign HMRC has not received the FPS submission needed to reconcile your record.
• You have switched jobs and your former employer issued the P45 late, so the W1/M1/X code stays in place longer than it should.

What to do if SBR W1 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.