What Does the BR Tax Code Mean in the UK? Cost, Causes, and Fixes

The BR tax code means your employer or pension provider deducts income tax at the basic rate of 20% on every pound you earn from that source, with no tax-free Personal Allowance applied. It is normal on a second job or a second pension, because your £12,570 allowance is already being used against your main income. If BR is showing up on your only source of PAYE income, something has gone wrong, and you could be losing hundreds of pounds a month you should be keeping.¹

What BR Means on Your Payslip

BR stands for Basic Rate. Attached to an employment or pension, it tells payroll to withhold a flat 20% from your gross pay before it hits your bank account. There is no tax-free portion built in.

Compare that with the standard 1257L code, which gives you £12,570 of tax-free income each year before the 20% rate starts. On BR, that cushion does not exist for that income source. The logic is straightforward: if you already receive your full Personal Allowance through one employer, a second employer has no allowance left to give. Rather than guess, HMRC instructs them to tax everything at 20%. It is a withholding rule, not a penalty.

Why You Might Be on BR

A Second Job or Second Pension

The most common reason is more than one source of PAYE income. HMRC allocates your full £12,570 to your main job, and the second job gets a BR code so its income is taxed from the first pound. The same happens with pensions: your largest pension usually receives the allowance, and smaller ones are coded BR.¹

You can ask HMRC to split your Personal Allowance between employers if that would reduce your withholding during the year. Contact HMRC’s income tax helpline to request a split. If your pay varies week to week, splitting can occasionally cause underpayment instead, so it is not always the right move.²

No P45 When You Started

When you start a new job, your employer normally uses your P45 from the previous role to set the correct code. Without a P45, you fill in an HMRC Starter Checklist, which asks you to pick one of three statements about your circumstances. Statement C reads “I have another job and/or I am in receipt of a State, workplace or private pension,” and choosing it instructs your new employer to apply BR.³

Hand over neither document and your employer has nothing to work with. They typically default to BR or an emergency code until HMRC catches up. This is where people quietly overpay for months. Submit the Starter Checklist as soon as you can, and check your details in your Personal Tax Account.

An Administrative Gap

Even with a single job, BR can appear temporarily. It happens when HMRC’s records lag behind a job change, or when information from your previous employer has not yet been processed. Retirees who begin drawing a workplace pension often see BR while HMRC works out how to split the allowance between the State Pension and private pension income. These situations usually clear within a few pay periods once a corrected code is issued.

How Much BR Actually Costs You

The maths is simple: gross pay times 0.20 equals the income tax deducted. Earn £2,000 a month from a second job and £400 goes to income tax before you see it.

On a standard 1257L code, roughly £1,048 of each month’s pay would be tax-free, so if BR is on your only job the difference in take-home pay is significant. The current Personal Allowance is £12,570 and the basic rate band runs from £12,571 to £50,270.⁴ BR effectively assumes someone else is already giving you that £12,570 threshold. If nobody is, you are overtaxed from day one.

When BR Undercharges You Instead

The opposite problem catches higher earners off guard. BR only takes 20%, but your combined income across all sources may push you into the higher rate bracket. The higher rate is 40% on earnings between £50,271 and £125,140.⁴

Say your main job pays £45,000 and your second pays £12,000. Total income is £57,000, and part of that second-job income should be taxed at 40%, but BR only takes 20%. You will owe the difference at the end of the tax year.

When this applies, HMRC should issue a D0 code instead of BR, which deducts at 40% on the full amount from that source. There is also a D1 code for the 45% additional rate, used when combined income exceeds £125,140.¹ HMRC cannot assign the right code if they do not know about every income source, so report new jobs or pensions through your Personal Tax Account before a bill builds up.

Earners above £100,000 have an extra wrinkle. The Personal Allowance tapers by £1 for every £2 above that threshold and disappears entirely at £125,140.⁴ At this level of income, any job coded with a full Personal Allowance means your overall withholding is far too low.

BR Is Not the Same as Emergency Tax

People often confuse BR with an emergency code, but they behave differently. An emergency code looks like 1257L W1 or 1257L M1. The “W1” (week 1) or “M1” (month 1) suffix tells your employer to calculate tax on each pay period in isolation, without building a cumulative record across the year. You still get a slice of the Personal Allowance in each period, so part of your pay is tax-free. On BR, you get none of it.

Emergency codes tend to appear when HMRC has some information about you but not enough for a proper cumulative code. BR appears when HMRC knows, or assumes, your allowance is already spoken for. In practice, emergency tax usually results in less overpayment than BR, because at least part of the allowance is being applied.

If You Live in Scotland or Wales

Scottish tax codes carry an “S” prefix, and the BR equivalent is SBR. The Scottish basic rate is also 20%, so the deduction is the same, but Scotland has more bands above it. A Scottish second job might instead be coded SD0 (intermediate rate, 21%), SD1 (higher rate, 42%), SD2 (advanced rate), or SD3 (top rate) depending on your total income.¹

Welsh codes carry a “C” prefix. The basic-rate equivalent is CBR and also deducts at 20%. Wales currently uses the same rates as England and Northern Ireland, so the prefix is mainly administrative but allows for future divergence. The higher and additional rate versions are CD0 and CD1.¹

Fixing a Wrong BR Code and Getting Your Money Back

If you think your BR code is wrong, the fastest route is the “Check your Income Tax” service on GOV.UK through your Personal Tax Account. You can review what HMRC thinks you earn from each employer or pension, correct any details, and the system recalculates your code.⁵ If you cannot use the online service, call HMRC’s income tax helpline.

Once HMRC processes the change, they issue a P2 Notice of Coding to you and send a revised code electronically to your employer’s payroll. Your employer must apply the new code from the next available pay period. If you have been overpaying, the cumulative code should adjust future deductions downward to refund you through your pay within the same tax year.

Do not wait for HMRC to notice. Their systems reconcile records only after the tax year ends, so a wrong BR code can sit there for months. If the year has already closed, HMRC sends a P800 tax calculation showing whether you overpaid or underpaid. When a refund is due, you can claim it online using the reference on your P800 and your National Insurance number. Online claims paid by bank transfer arrive within five working days; a cheque requested online takes around six weeks. If your P800 says HMRC will send a cheque automatically, expect it within 14 days of the letter’s date. P800 letters are typically issued between June and October after the tax year ends.⁶

1
GOV.UK. Tax Codes – What Your Tax Code Means
2
GOV.UK. How Tax Works if You Have More Than One Job
3
GOV.UK. Starter Checklist
4
GOV.UK. Income Tax Rates and Personal Allowances
5
GOV.UK. Check Your Income Tax for the Current Year
6
GOV.UK. If Your Tax Calculation Letter (P800) Says You’re Due a Refund