If you have a second job, you do not get taxed more just because it is a second job. You pay Income Tax on your total taxable income for the 2026/27 tax year, and HMRC usually gives your full Personal Allowance of £12,570 to one job only. The other job is often taxed without any allowance attached to it, which is why the deductions can look higher.
In practice, that means the main questions are not whether second jobs are taxed differently, but how HMRC splits your tax code, whether you stay in the basic-rate band, and whether your combined income pushes part of your pay into higher-rate or additional-rate tax.
Do you get taxed more if you have two jobs?
No. Having two jobs does not create a separate higher tax charge by itself. You are taxed according to your total income across all jobs, not the number of employers paying you.
What often causes confusion is the tax code on the second job. If your full Personal Allowance is already being used in your main job, the second job may be taxed from the first pound you earn there. That can make the second payslip look heavily taxed, even though the overall tax position may still be correct.
If your total taxable income stays within the basic-rate band, you usually pay 20% Income Tax on taxable income above your allowance.
If your combined income goes above £50,270, some income may fall into the higher-rate band and be taxed at 40%.
If your combined income goes above £125,140, some income may fall into the additional-rate band and be taxed at 45%.
National Insurance is worked out separately for each job, not on your combined annual earnings in the same way as Income Tax.
HMRC explains the general rule on having more than one job here:
https://www.gov.uk/guidance/how-tax-works-if-you-have-more-than-one-job.
That guidance is useful if you want to compare what appears on your payslip with HMRC’s own explanation.
How does a second job affect your Personal Allowance?
Usually, your Personal Allowance of £12,570 is applied to one job, not both. In most cases HMRC puts it against your main job, often the one where you earn more or the one they treat as your primary employment.
That means your second job often gets no Personal Allowance at all. So even if the pay is modest, tax may start being deducted straight away from that second job. This does not mean you have lost your allowance. It usually means the allowance is already being used elsewhere.
You normally get one Personal Allowance across your total income, not one per job.
If you have two jobs, HMRC can split the allowance between them, but this is not always done.
If one job uses all of your allowance, the second job may be taxed with no tax-free pay in that employment.
If your adjusted net income goes above £100,000, your Personal Allowance starts to reduce, regardless of how many jobs you have.
For 2026/27, the Personal Allowance is £12,570. It starts to taper away once income goes above £100,000, and it is fully removed at £125,140. So if a second job pushes you past £100,000, it can affect your allowance indirectly by increasing total income.
What tax code will you have for a second job?
In many cases, your main job gets the standard allowance-based code and your second job gets a code such as BR, D0 or D1. Which one applies depends on your total expected income and how HMRC decides to collect the right amount of tax through PAYE.
What does 1257L usually mean?
1257L is the standard tax code for someone receiving the full £12,570 Personal Allowance through that employment. If one of your jobs has 1257L, that usually means this is the job where your allowance is being used.
What does BR mean on a second job?
BR means all pay from that job is taxed at the basic rate of 20%. There is no Personal Allowance attached to that job. BR is common for second jobs where your allowance is already used in your main job and your combined income is expected to stay below the higher-rate threshold.
What does D0 mean on a second job?
D0 means all pay from that job is taxed at the higher rate of 40%. This may be used if HMRC expects your combined income from all jobs to put that job’s earnings into the higher-rate band.
What does D1 mean on a second job?
D1 means all pay from that job is taxed at the additional rate of 45%. This is less common, but it can appear if your total expected income is high enough.
What if your second job is on an emergency tax code?
A new second job can sometimes start on an emergency tax code, especially if payroll does not yet have full details from HMRC or from your starter information. That can lead to temporary overpayments or underpayments until the code is corrected.
If the code looks odd, compare it with your payslip and HMRC records. Our guides on /blog/what-your-tax-code-means-and-how-to-check-it-is-right and /blog/emergency-tax-codes can help you decode what you are seeing.
Does a second job push you into a higher tax band?
It can, but only if your combined taxable income is high enough. A second job does not have its own separate tax band. Instead, it adds to your other earnings and may push some of your total income into a higher band.
For 2026/27 in most of the UK, taxable income after allowances is charged at 20% in the basic-rate band, 40% in the higher-rate band, and 45% in the additional-rate band. The key thresholds are based on total income, not per job.
Basic-rate limit: £37,700 of taxable income after allowances.
Higher-rate threshold in practice: £50,270 when you add the £12,570 Personal Allowance and the £37,700 basic-rate limit.
Additional-rate threshold: £125,140.
Allowance taper starts: £100,000.
Example: if you earn £35,000 in your main job and £8,000 in a second job, your total income is £43,000. That is still below £50,270, so you would usually remain a basic-rate taxpayer overall. Your second job may still be taxed at BR, but that is consistent with your overall position.
Example: if you earn £48,000 in your main job and £10,000 in a second job, your total income is £58,000. Part of your income now sits above £50,270, so some of your earnings fall into the 40% band. In that situation, the second job can be the reason you start paying higher-rate tax, but only because your total income has crossed the threshold.
How is National Insurance worked out if you have two jobs?
National Insurance can work differently from Income Tax because each job is usually assessed separately. This means you might pay less or more NI overall than you expected, depending on how much you earn in each employment.
For 2026/27, employees pay 8% NI on earnings between £12,570 and £50,270, and 2% on earnings above £50,270. But those thresholds are generally applied within each job’s payroll calculation rather than across your total annual pay in the same direct way as Income Tax.
If both jobs pay below the NI threshold, you may pay no employee NI in either job.
If one job is above the threshold and the other is below, you may pay NI only in one job.
If both jobs are above the threshold, you may pay NI in both jobs.
Your Income Tax and NI position can therefore look different even when based on the same two salaries.
This is one reason a second-job payslip can be surprising. You might see tax deducted immediately in the second job because it has no allowance, but little or no NI if that second salary is low enough within that payroll.
What does a second job look like on your payslip?
Usually, the clearest signs are the tax code and the fact that tax may start from the first pound of pay. If the second job has a BR, D0 or D1 code, that is a strong signal that HMRC is not giving that job any Personal Allowance.
A main job often shows 1257L if it carries your allowance.
A second job may show BR, D0 or D1.
Student loan deductions can apply in either or both jobs if earnings are high enough in the relevant payroll.
Pension contributions can reduce taxable pay, depending on how the scheme is set up.
If you want help reading the shorthand on your payslip, /blog/uk-payslip-codes-and-abbreviations and /blog/understanding-uk-payslip-deductions are useful next steps.
Will you overpay tax on a second job?
Sometimes, yes. Overpayments are more likely when a new second job starts on the wrong code, when HMRC has not yet matched your jobs correctly, or when your earnings vary during the year. Underpayments can happen too.
A temporary mismatch does not always mean the final annual tax will be wrong, but it can affect monthly take-home pay. If HMRC later adjusts your code or reviews the year-end figures, the position can be corrected through PAYE or through a refund process.
If you think you have paid too much, our guide at /blog/how-tax-refunds-work-uk explains how refunds are usually handled.
How do student loans and pensions affect tax on a second job?
A second job can also affect deductions beyond Income Tax. Student loan repayments and pension contributions can change your take-home pay, and they do not always work in the same way as your tax code.
For student loans in 2026/27, annual thresholds are £26,900 for Plan 1, £29,385 for Plan 2, £33,795 for Plan 4, £25,000 for Plan 5, and £21,000 for Postgraduate loans. PAYE deductions are usually based on earnings in each payroll, so the way repayments show up can differ from how you think about your total yearly income.
Pension contributions can reduce taxable pay if they are made through payroll in a tax-efficient way. That can soften the tax effect of extra earnings from a second job. If you want more detail, see /blog/how-pension-contributions-affect-income-tax and /blog/find-your-student-loan-plan.
What are simple examples of tax on a second job?
The pattern is usually straightforward once you separate total income from tax-code mechanics. Here are three simple 2026/27 examples.
Example 1: main job £30,000, second job £5,000
Your total income is £35,000. You are still within the basic-rate band overall. The main job may use 1257L, and the second job may use BR. That means the second job is taxed at 20% from the first pound, but you are not being charged a special second-job rate.
Example 2: main job £45,000, second job £12,000
Your total income is £57,000. Some of your income is now above £50,270, so part of your earnings falls into the 40% band. HMRC may code the second job at BR at first, then later adjust if needed, or use D0 if it expects that pay to sit in the higher-rate band.
Example 3: main job £102,000, second job £8,000
Your total income is £110,000. You are already above the point where the Personal Allowance starts to taper. The second job not only adds income taxed at higher rates, it also reduces your Personal Allowance further because total income is above £100,000.
How can you check if the tax on your second job looks right?
Start by checking three things: your total expected income for the year, which job has your Personal Allowance, and which tax code each employer is using. Most second-job confusion comes from one of those points.
Add both salaries together to estimate your total annual income.
Check whether one job has 1257L and the other has BR, D0, D1 or an emergency code.
Compare your combined income with the £50,270 and £125,140 thresholds.
Look at whether pension contributions or student loan deductions are also affecting take-home pay.
Use a calculator to model your combined net pay rather than judging from one payslip alone.
If you want to run your own figures, /calculators/take-home is useful for a single salary and /calculators/compare helps when you want to compare one-job and two-job scenarios.
What is the bottom line on tax if you have a second job?
The bottom line is simple: a second job does not automatically mean a higher tax rate. Your total income decides your Income Tax band, your Personal Allowance is usually used once across all jobs, and your second job often gets a tax code with no allowance attached.
That is why second-job pay can look more heavily taxed even when the overall calculation is normal. If your combined income crosses key thresholds, part of your earnings may move into a higher band. If not, the main change is often just how HMRC collects the tax through PAYE.