Two Jobs Tax Calculator UK 2026/27
A second job is not "taxed more", but it is taxed differently at payroll. This calculator shows your real combined position: tax on the total, NI per job, and what lands in your account.
| Total gross (£28,000 + £12,000) | £40,000 |
|---|---|
| Income Tax (on combined income) | £5,486 |
| NI on main job | £1,234 |
| NI on second job | £0 |
| Take-home pay | £33,280 |
- Income Tax is your true annual liability on the combined income; HMRC usually collects it via code 1257L on the main job and BR/D0 on the second, then reconciles.
- National Insurance applies per employment, each job gets its own £12,570 threshold, which is why two jobs often beat one job of the same total.
- Student loans and pension are not included here, model each job in the main calculator.
Why your second job's payslip looks harsh
Your personal allowance is normally applied entirely to your main job (code 1257L), so the second job is taxed from the first pound at basic rate (code BR) or higher (D0). That is not extra tax. It is the same annual liability collected differently. If the split leaves allowance unused on the main job, you can ask HMRC to divide your allowance between the jobs.
The National Insurance quirk
NI works per employment: each job has its own £12,570 threshold. Two jobs of £20,000 each pay NI on £7,430 each, while one £40,000 job pays NI on £27,430. Same total income, £1,005.60 less NI a year. The calculator shows this advantage for your numbers.
Watch out for
- Crossing into higher rate: if the combined income passes £50,270, the second job should be D0-coded, if it stays BR you will underpay and get a bill.
- Student loans: payroll deducts per job above each plan threshold; the annual truth is settled through self-assessment if you file.
- Pension auto-enrolment applies per job over £10,000.
Frequently asked questions
Do I pay more tax if I have two jobs?
You do not pay more tax overall, but the second job is usually taxed at your highest marginal rate because your personal allowance is used up by the first job.
What tax code applies to a second job?
HMRC typically gives a second job tax code of BR (basic rate, 20%) or D0 (higher rate, 40%) depending on your total income. You can adjust the allocation by contacting HMRC.
How does National Insurance work across two jobs?
Each employer calculates NI separately on their payments. You may overpay if your combined earnings push you over the upper earnings limit and you can claim a refund after the tax year.