Do I pay more tax just for having a second job?

No. This is the biggest myth about second jobs. You are taxed on your TOTAL income for the year, not penalised for having two jobs. Two jobs paying £10,000 each are taxed the same overall as one job paying £20,000. What changes is how the tax is collected: your tax-free Personal Allowance (£12,570) is usually attached to your main job, so the second job is often taxed at the basic rate on every pound — but that is the same total tax, just taken differently.

Why does my second job have a BR tax code?

BR means Basic Rate — 20% tax is taken from all of that job’s pay, with no tax-free allowance applied. HMRC does this because your Personal Allowance is normally given to your main job (code 1257L). If your main job already uses up your whole allowance, a BR code on the second job is usually correct. But if your main job pays less than the £12,570 allowance, a BR second job can mean you overpay — and you can ask HMRC to split your allowance.

What if my main job doesn't use all my Personal Allowance?

Then a BR code on your second job may be taking too much tax. You can ask HMRC to move part of your Personal Allowance to the second job (or split it across both) so you are not taxed on income that should be tax-free. Do this through the free HMRC app or your Personal Tax Account, or by calling HMRC. If you have already overpaid, you can claim it back.

How does National Insurance work with two jobs?

National Insurance is worked out separately for each job, and each job has its own earnings threshold before NI is due. This can actually leave someone with two jobs paying less National Insurance than someone earning the same total from one job — a genuine quirk in your favour. NI is not pooled across jobs the way income tax effectively is.

Tax on a second job: the BR code myth

Q: What if my second income is self-employed?

That is different. If you have a job AND self-employed income, you can earn up to £1,000 of trading income tax-free under the trading allowance; above that you must register for Self Assessment and declare it, paying tax through a return rather than through a tax code. Your employed income still uses your Personal Allowance. See our Self Assessment guide.

The myth — and what’s really happening

People turn down extra work because they think a second job is taxed at some punishing special rate. It isn’t. UK income tax is worked out on your total income across the whole year, against the same bands whether it comes from one job or three:

Your total income	Tax rate on that slice
First £12,570 (the Personal Allowance)	0% — tax-free
£12,571 to £50,270	20% — basic rate
£50,271 to £125,140	40% — higher rate
Over £125,140	45% — additional rate

Two jobs paying £10,000 each are taxed the same overall as one job paying £20,000. The second job only feels heavily taxed because your tax-free Personal Allowance is normally attached to your main job — so the second job is taxed from the very first pound. Same total tax; it’s just front-loaded onto job two.

The reassuring truth You will never lose money by taking a second job. Every extra pound is taxed at most at your marginal rate (usually 20%), so you always keep the majority of it. The fear of “losing it all to tax” is simply wrong.

Why your second job says BR

Your tax code tells each employer how much tax-free pay to give you:

1257L — the standard code, giving the full £12,570 Personal Allowance. This is normally on your main job.
BR (Basic Rate) — 20% tax on all the pay, no tax-free allowance. This is the usual code for a second job, because your allowance is already being used on the first.
D0 / D1 — 40% / 45% on all of it, used for a second job if your main income already fills the basic-rate band.

If your main job pays more than £12,570, a BR code on your second job is usually correct — your allowance is genuinely used up. The problem case is below.

When BR means you’re overpaying If your main job pays less than £12,570 (part-time, term-time, reduced hours), part of your Personal Allowance is going unused — but a BR second job still taxes you from pound one. You’re then paying tax you don’t owe. The fix: ask HMRC to split your allowance across the two jobs so the tax-free band isn’t wasted.

The National Insurance quirk in your favour

Income tax effectively pools across your jobs, but National Insurance does not — it’s calculated separately for each job, and each job has its own earnings threshold before NI starts. Because each job gets its own threshold, someone with two jobs can pay less National Insurance than someone earning the same total from a single job. It’s one of the few quirks that quietly works in a multi-jobber’s favour — and another reason a second job is rarely the bad deal people fear.

How to check, fix, and reclaim

See all your tax codes in one place — the free HMRC app or your Personal Tax Account shows the code on each job and your estimated tax for the year.
Allowance going to waste? Tell HMRC (via the app, Personal Tax Account, or phone) to move or split your Personal Allowance so it covers your lower-paid main job and the rest goes to the second.
Already overpaid? If a BR code took tax while your allowance was unused, you can reclaim it — HMRC often refunds automatically after the tax year via a P800, or you can claim. See our tax refund guide.
Self-employed second income? Different rules — up to £1,000 trading income is tax-free; above that, register for Self Assessment.

Do this now

Open the HMRC app and look at the tax code on each job. Main job under £12,570 with a BR code on the second? You’re probably overpaying — ask HMRC to split your allowance, and it’ll usually fix it within a pay period or two.

Earned a second income last year on a BR code? Check whether you’re owed a refund — our tax refund guide shows the free way to claim it back from HMRC directly.

Not financial advice SortedUK is not a regulated adviser — this is general information on how PAYE handles more than one job. The Personal Allowance (£12,570) and the tax bands are frozen but can change at a Budget, so confirm the current figures and your own position on GOV.UK or with HMRC before acting.

Source verification

Primary sourceGOV.UK — Income Tax rates and Personal Allowances; GOV.UK — Tax codes (BR, D0, D1, 1257L); GOV.UK — Second job / more than one job guidance

Specific URLgov.uk/income-tax-rates · gov.uk/tax-codes

Last verified13 June 2026

ConfidenceHigh on the framework — Personal Allowance £12,570, bands 20/40/45%, the BR/D0/1257L codes and per-job NI are long-standing rules. The allowance and bands are frozen but can change at a Budget — confirm current figures on GOV.UK.

Key factsNo extra tax for a second job — total income is taxed · Personal Allowance £12,570 normally on the main job (1257L) · second job often BR (20% all) / D0 (40%) / D1 (45%) · split the allowance if the main job is under £12,570 · NI calculated per job, each with its own threshold · self-employed second income → £1,000 trading allowance then Self Assessment

ScopeUK-wide framework; Scotland has its own income tax bands, so a Scottish taxpayer’s rates differ — check your own position.

Tax on a second job — common questions

Do I pay more tax for having two jobs?

No. You’re taxed on your total income — two jobs are taxed the same overall as one job paying the combined amount. A second job adds no extra tax, it’s only collected differently (usually a BR code on the second job).

What does a BR tax code mean?

Basic Rate — 20% tax on all of that job’s pay, with no tax-free allowance, because your Personal Allowance is on your main job. It’s usually correct if your main job already uses your full £12,570 allowance.

My main job is part-time — am I overpaying?

Possibly. If your main job pays under £12,570, some of your allowance is unused but a BR second job still taxes you from pound one. Ask HMRC to split your Personal Allowance across both jobs, and reclaim any tax already overpaid.

How is National Insurance affected?

NI is worked out separately for each job, each with its own threshold — so two jobs can mean less NI than one job paying the same total. It’s a quirk in your favour.

What if my second income is self-employed?

Up to £1,000 of trading income is tax-free; above that you register for Self Assessment and declare it. Your employed income still uses your Personal Allowance through PAYE.

Sources Income tax bands and the Personal Allowance · GOV.UK — Income Tax rates and Personal Allowances. Tax codes including BR, D0, D1 and 1257L · GOV.UK — Tax codes. More than one job · GOV.UK and the HMRC app / Personal Tax Account. SortedUK is not a regulated financial adviser and this is general information — confirm current figures and your own tax position on GOV.UK before acting. Last reviewed: 13 June 2026.

A second job doesn’t mean more tax — it just gets taken differently.

The myth — and what’s really happening

Why your second job says BR

The National Insurance quirk in your favour

How to check, fix, and reclaim

Tax on a second job — common questions

Take the extra work. Then check the code isn’t costing you.

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