Second Job Tax UK: How Much Tax Will You Pay in 2025/26?

Q: Do I pay more tax overall because I have two jobs?

No. Two jobs don't attract extra tax — your total tax bill is the same as if you earned the combined amount from one job. The BR code just collects it differently.

Q: What tax code should my second job have?

Usually BR (basic rate, 20%) if your main job uses your full personal allowance. Higher earners may see D0 (40%) or D1 (45%). If your main job pays under £12,570 you can ask HMRC to split your allowance between jobs.

Q: Do I need to tell HMRC about a second job?

Your new employer's payroll notifies HMRC automatically via the starter checklist — tick that it's not your only job. You only contact HMRC yourself if your tax code looks wrong or you want your allowance split.

Q: Is a side hustle taxed like a second job?

No. Self-employed income is handled through Self Assessment, not PAYE. You get a £1,000 trading allowance — below that, no tax and usually no need to register.

More than 1.2 million people in the UK now work a second job, and the single biggest worry is always the same: "will I get hammered on tax?" The short answer is no — a second job doesn't attract any extra tax. But the way it's collected is different, and that's where the confusion (and the scary-looking payslips) come from.

The Big Myth: "Second Jobs Are Taxed at a Higher Rate"

They aren't. HMRC taxes your total income for the year, no matter how many jobs it comes from. Someone earning £25,000 from one job pays exactly the same Income Tax as someone earning £18,000 from one job and £7,000 from another.

The myth exists because of tax codes. Your tax-free personal allowance (£12,570 in 2025/26) is normally applied entirely to your main job. Your second job then gets tax code BR — meaning every pound is taxed at the basic rate of 20% from the first payslip. It feels like a penalty, but it's just your allowance being used up elsewhere.

Tax Codes for Second Jobs Explained

BR — all income taxed at 20%. The standard code for a second job when your main job pays over £12,570 but keeps you in the basic rate band.
D0 — all income taxed at 40%. Applied when your main job already pushes you into the higher-rate band (over £50,270 total).
D1 — all income taxed at 45%. For additional-rate taxpayers (over £125,140).
Split allowance — if your main job pays less than £12,570, you can call HMRC and ask them to split your personal allowance across both jobs so you're not overpaying during the year.

Worked Example: £24,000 Main Job + £8,000 Second Job

Meet Sam, who earns £24,000 in an office job and picks up £8,000 a year of weekend bar work in 2025/26:

Main job: £24,000 − £12,570 allowance = £11,430 taxed at 20% = £2,286
Second job (BR code): £8,000 × 20% = £1,600
Total Income Tax: £3,886 — exactly what a single £32,000 job would pay.

National Insurance works slightly differently — and here's a quirk that actually works in your favour.

National Insurance: The Two-Job Advantage

Unlike Income Tax, employee National Insurance is calculated per job, not on your combined income. Each employment gets its own £12,570 threshold before the 8% rate kicks in.

For Sam above: the main job pays NI on £11,430 (£914), but the £8,000 bar job is below its own NI threshold — so it pays zero National Insurance. Someone earning the same £32,000 in one job would pay £1,554. Sam saves about £640 a year purely because the income is split across two employments.

Watch Out For These

Crossing the higher-rate line. If your combined income passes £50,270, some of your second-job income should be taxed at 40% — but a BR code only collects 20%. HMRC usually catches this and adjusts your code or sends a bill later, so set something aside.
Student loans. Each PAYE job only triggers repayments if that job alone crosses the threshold — but if you complete Self Assessment for any reason, your combined income is used.
Emergency tax on your first payslip. Tick the correct box on your starter checklist ("this is not my only job") to get BR from day one instead of an emergency code.
Side hustles aren't second jobs. Freelancing or selling online goes through Self Assessment instead. You get a £1,000 trading allowance first — below that, there's usually nothing to do at all.

How to Check Your Numbers

The quickest way to see your real combined position: run your total income through the UK Salary Calculator to see what you should pay for the year, then compare it with what your two payslips are actually deducting. If you're self-employed on the side, the UK Self-Employed Tax Calculator handles that piece, and the UK National Insurance Calculator shows the per-job NI picture. Paid hourly? Convert with the Hourly ↔ Salary Calculator first.

FAQ

Do I pay more tax overall because I have two jobs?

No. Your total tax bill is identical to earning the combined amount from one job. The BR code just collects the second job's share at a flat 20% because your allowance is already used by your main job.

What tax code should my second job have?

Usually BR. If your main job already puts you in the higher-rate band, expect D0. If your main job pays under £12,570, call HMRC (0300 200 3300) and ask them to split your personal allowance between the two jobs.

Do I need to tell HMRC about a second job?

Not directly — your new employer's starter checklist does it automatically. Just make sure you tick that it isn't your only job. Check your tax codes at gov.uk/check-income-tax-current-year after your first payslip.

Is a side hustle taxed like a second job?

No. Self-employed income goes through Self Assessment, not PAYE. The first £1,000 of trading income each year is covered by the trading allowance — below that you normally don't even need to register.

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