Second Job Tax BR Code Explained for 2026/27

A second job does not automatically attract a special tax rate. Income tax depends on your total taxable income and available allowances. Your tax code tells each employer how to collect tax through payroll. BR commonly appears on a second job because the main job already uses the Personal Allowance. This second job tax BR code guide explains what BR means for your pay and when it collects too little.

BR means that the employer taxes all pay from that job at the basic rate. For a standard English employment example, that rate is 20%. The code does not mean that HMRC has calculated your final tax liability across every source of income. It is a payroll instruction for that particular job.

This article uses the 2026/27 tax year, which runs from 6 April 2026 to 5 April 2027. The main numerical examples assume residence in England, Wales or Northern Ireland and the standard £12,570 Personal Allowance. Scottish codes and income tax bands require a different calculation.

You receive one Personal Allowance, not one per job

A standard employee normally receives one £12,570 Personal Allowance for the year. Taking another job does not create a second allowance. HMRC can allocate that allowance between jobs through the tax codes it sends to employers.

If your main job already pays enough to use the whole allowance, the second job may receive a code that gives no allowance. BR can then collect 20% income tax on each pound of pay from that job. This is often a sensible starting instruction when total income remains within the basic rate band.

If the main job pays less than £12,570, allocating the entire allowance there can leave some allowance unused while the second job collects tax. Check your estimated income for both jobs with HMRC. A revised allocation may improve payroll accuracy, but the final entitlement does not increase just because the allocation changes.

Do not tell both employers to use the full standard allowance without HMRC's instruction. That can cause insufficient deductions and a later tax bill. Your employer follows the code HMRC provides rather than choosing a code solely from an online calculator result.

A £30,000 main job and £6,000 second job

Suppose your main job pays £30,000 and your second job pays £6,000 across the year. Combined employment income is £36,000. Subtract the £12,570 Personal Allowance and the taxable amount comes to £23,430.

At 20%, the total annual income tax estimate is £4,686. The £30,000 main job alone would produce £3,486 under the same assumptions. The extra £6,000 therefore adds £1,200 of income tax.

A second job tax BR code collecting 20% on the second job's £6,000 would collect that £1,200. Before any National Insurance, pension or student loan deduction associated with the extra work, the second job contributes £4,800 after income tax.

That example does not make £4,800 a universal promise. If your total income, allowances or benefits differ, the final position can change. Use the income tax calculator to examine combined annual income tax, but do not assume its one salary National Insurance result models two employers.

When your second job tax BR code does not collect enough tax

Now suppose the main job pays £48,000 and the second job pays £6,000. Combined income reaches £54,000. With the standard allowance, the first £50,270 of gross employment income stays within the allowance and basic rate band. The remaining £3,730 falls in the 40% higher rate band.

Total annual income tax is £9,032 in this example. The £48,000 main job alone produces £7,086. The second job therefore adds £1,946 of annual income tax, rather than £1,200.

If the second employer only collects BR tax on £6,000, it collects £1,200. That leaves a £746 difference against the combined annual example, unless another code or deduction collects it elsewhere. HMRC may adjust the codes to improve collection across the two jobs.

Do not apply 40% to all income merely because combined salary reaches £54,000. Only the portion in the higher band faces that rate in this straightforward case. Conversely, do not assume BR guarantees that every pound from the second job will ultimately face only 20% tax.

National Insurance normally treats jobs separately

Income tax and employee National Insurance do not use identical rules for multiple jobs. For ordinary separate employments, each employer normally calculates employee National Insurance using pay from that employment and the relevant pay period thresholds.

Two jobs paying £500 a month each do not automatically become one £1,000 monthly employment for National Insurance. Likewise, a main job that exceeds a threshold does not automatically remove the threshold from an unrelated second employment. There are rules that can require earnings aggregation in particular circumstances, so check unusual arrangements with payroll.

For 2026/27, the ordinary employee primary threshold is £242 a week or £1,048 a month. Employee National Insurance usually applies at 8% above that threshold up to the upper earnings limit and at 2% above the upper limit. The employee category and special circumstances can change the result.

A second job paying £500 every month would normally stay below the monthly primary threshold for that employment. Uneven hours, a bonus or different pay frequency can change a particular period's deduction. Use the National Insurance calculator separately for each ordinary employment and check whether aggregation rules apply.

What the letters on the tax code tell you

BR means basic rate tax on all income from that job or pension. D0 indicates higher rate tax on all income from that source in the relevant rest of UK context. D1 indicates additional rate. A code that includes an allowance works differently.

Scottish taxpayers normally have an S prefix. SBR uses the Scottish basic rate, while other Scottish codes can allocate a different rate. Scotland's intermediate and higher bands mean an English BR example may not explain the final Scottish annual liability.

A 0T code gives no Personal Allowance but is not identical to a BR code. It can appear where the employer lacks the information needed for the correct code or where the allowance has already gone elsewhere. W1, M1 or NONCUM indicate a noncumulative basis rather than a separate permanent tax band.

Read the full code and check HMRC's explanation. Do not diagnose a deduction from the letters BR alone if the payslip includes another instruction, a Scottish prefix or an adjustment that affects a different job.

Starting a second job without a P45

If you keep your main job, you will not normally have a leaving P45 from it to give the second employer. The new employer uses the starter information you provide and later follows HMRC's coding instructions.

Answer the starter questions accurately, including whether you already have another job or receive a pension. A wrong declaration can produce an inaccurate initial code. Keep copies of your starter information and your first payslip so payroll can identify what it used.

If the code looks wrong, check your Personal Tax Account and the income estimates for both employers. HMRC can review the coding allocation. Your employer can correct a payroll mistake, but it cannot simply invent a new allowance because you want a smaller deduction.

Pensions and student loans need their own review

A workplace pension in the second job may reduce take home pay and may affect income tax depending on the contribution method. Do not assume both employers use the same pension basis or that a pension percentage applies to all gross pay.

Student loan repayments also have separate multiple employment rules. Under ordinary PAYE arrangements, an employer generally checks earnings in that employment against the relevant loan threshold. Self Assessment can involve a wider annual income calculation where it applies.

Check your plan with the student loan repayment calculator, but tell the employer about the correct borrowing terms. Use the pension contribution calculator to examine the scheme method rather than subtracting an arbitrary amount from combined gross salary.

Checking whether the extra work is worthwhile

Begin with the second job's gross pay, calculate its effect on total annual income tax and then assess the separate employment deductions. Add travel and other work costs separately. This produces a clearer comparison than assuming every second job loses a fixed percentage.

Keep records from both employers, including payslips and annual pay summaries. They help explain code changes and any year end reconciliation. If HMRC asks for further information, use actual pay rather than an old estimate of hours you planned to work. Actual pay also shows whether the second job tax BR code collected the right amount of tax.

Can you split your Personal Allowance between two jobs?

Yes. The BR code is the default when a second job starts, but it is not the only option. If your main job uses less than your full £12,570 Personal Allowance, HMRC can split the allowance between both jobs so each employer gets part of it. That usually beats leaving a slice unused in the main job while the second job is taxed at a flat 20% from the first pound.

Ask HMRC to make the split rather than asking your new employer, because employers can only apply the code HMRC issues. Our tax code explained guide walks through how to check the code on your payslip and how to get a wrong one fixed.

Second job tax BR code: frequently asked questions

Is a BR code always right for a second job?

Not always. A second job tax BR code is a reasonable start when your main job uses the full Personal Allowance and your total income stays in the basic rate band. It collects too little if your combined income reaches a higher band, so check the totals at year end.

Can I ask HMRC to change the code on my second job?

Yes. You can ask HMRC to review how your allowance is split between jobs through your Personal Tax Account. If your main job pays less than £12,570, a revised allocation may suit you better than a plain second job tax BR code instruction.

Does BR affect National Insurance on my second job?

No. The second job tax BR code only sets the income tax payroll instruction. Employee National Insurance is calculated separately for each job against that employment's pay period thresholds.

Official sources and limits

The explanations of BR, D0, D1 and Scottish codes come from HMRC's guide to what your tax code means. The thresholds and contribution rates come from HMRC's rates and thresholds for employers for 2026/27.

The examples cover ordinary employed income and standard allowances, not every multiple employment arrangement. A calculator cannot amend your code or establish whether you must submit a return. Ask HMRC or payroll to check the specific issue when actual deductions do not match the assumptions above.