What does the BR tax code mean?

What BR does to your pay

BR stands for basic rate. HMRC's PAYE manual puts it plainly: the employer deducts tax at the basic rate from all the payments, which gives no allowances and ignores the higher rates. There is no number in the code because there is no tax-free pay to spread across your pay days.

That makes the arithmetic short. Every pound is taxed at 20%. On pay of £10,000 from that job, code BR takes £2,000.00 in income tax and leaves £8,000.00 for the year.

A BR code is not a penalty and it is not a sign that something has gone wrong. It is a statement about where your allowance is being used, and the statement is usually correct.

Why you have been given it

BR is used for two quite different reasons, and it matters which one applies to you.

The first is that you have more than one job or pension. Your Personal Allowance is normally given in full at your main job. The second employer has no allowance left to give, so HMRC sends them BR. Nothing has gone wrong.

The second is that you started a job without a P45 and ticked the third statement on the starter checklist. Your P45 is the form your last employer gives you when you leave. The starter checklist is what a new employer asks you to fill in instead. Its third statement says you have another job or pension. The PAYE manual tells employers to use BR for a new employee who has ticked it. Tick it by mistake when this is your only job and BR will overtax you from your first payslip.

When BR is right, and when it costs you

BR assumes two things: that your allowance is fully used elsewhere, and that your total income stays inside the basic-rate band. While both hold, it collects close to the right tax. It goes wrong in both directions.

Too much tax. If your main job pays less than your Personal Allowance, part of that allowance sits unused while your second job is taxed on every pound. You pay tax you do not owe until the codes are split between the two jobs. On £10,000, the gap between BR and a code carrying the whole Personal Allowance is £2,000.00 over a year. That is the most that can be at stake, and only if none of your allowance is being used at the other job. If part of it is already in use there, the unused part is smaller and so is the difference.

Too little tax. BR ignores the higher rates. Once your two jobs together take you past £50,270, part of your pay should be taxed at 40%. BR does not do that. The shortfall builds up quietly, and HMRC collects it later, usually by changing one of your codes to D0 or by lowering the number at your main job.

National Insurance does not follow your tax code

This is the difference that catches people with two jobs, and it runs the opposite way to everything above.

Income tax is effectively shared across your jobs. There is one Personal Allowance and one set of rate bands for the year, and your tax codes are what divide them between employers, which is why the second job gets BR in the first place.

National Insurance is not shared at all. It is charged on the earnings paid in respect of any one employment, in each pay period, and the legislation says so in terms: contributions on one employment are payable without regard to any other payment of earnings in respect of any other employment. There is no annual total for an employee and no end-of-year reconciliation.

So the threshold is a per-period one and it applies to each job separately: £1,048 a month, or £242 a week. Two jobs each paying under the monthly threshold attract no employee National Insurance on either, even when the two together come to well over £12,570 a year. The annual figure is the one that hides this, so read your payslips one at a time.

Two situations undo it, and neither is unusual. Earnings from more than one job with the same employer in the same period are added together and treated as a single payment, so the threshold is applied once to the total. The same is true of two employers who carry on business in association with each other, which covers two companies in the same group. Both rules give way where adding the earnings up is not reasonably practicable. Two genuinely unconnected employers fall into neither, so the general rule holds for them.

BR is not the same as 0T

The two codes look alike and behave differently. BR charges the basic rate on everything, whatever the amount. 0T gives no allowance either, but it charges tax through the bands, so a large payment runs into the higher and additional rates.

On a small second job the two take the same tax. On a redundancy payment, a late bonus or a well-paid second contract they do not. The 0T guide sets out when each is used.

The Scottish and Welsh versions

SBR deducts tax at the Scottish basic rate and CBR at the Welsh basic rate. The prefix follows where your main home is, not where your employer is based. For 2026/27 the Scottish basic rate is 20% and the Welsh basic rate is 20%, so an SBR or CBR second job is taxed the same as a BR one this year.

The ladders part company above the basic rate, and that is where the Scottish second-job codes stop matching their UK namesakes: SD0 is the Scottish intermediate rate, not the higher rate.

Is BR an emergency tax code?

No. Emergency codes end in W1, M1 or X, and they still give you the standard allowance, one pay period at a time. BR carries no allowance at all. It is an ordinary code for a second source of income rather than a sign of a problem, and the two are corrected in different ways.

How to get your allowance back from a BR job

Tell HMRC which job should hold the allowance, using the check your Income Tax service. HMRC then issues new codes to both employers. The refund comes through your pay once the new code is in use.

Whichever job uses the allowance first, the total tax across both is usually the same by the end of the tax year. Putting the allowance against the job that reliably pays more than it only avoids leaving part of it unused month to month. We can show you the figures; the choice, and the conversation with HMRC, is yours.