What Happens to Your Tax When You Have Two Jobs?
Having two jobs is increasingly common.
You might have:
- A full-time job and an evening job
- Two part-time jobs
- Seasonal work alongside your main employment
- A PAYE job alongside a pension
- Multiple casual or zero-hours roles
Having more than one job does not automatically mean you pay more tax overall.
But it can make PAYE more complicated.
The main issue is that you only have one Personal Allowance, and HMRC needs to decide how that allowance is allocated across your different sources of income.
If the wrong tax code is applied to either job, you could temporarily pay too much tax — or not enough.
Do you get a Personal Allowance for each job?
No.
For the 2026/27 tax year, the standard Personal Allowance remains £12,570.
That allowance applies to your overall taxable income.
You do not receive:
£12,570 tax-free from Job 1
plus another:
£12,570 tax-free from Job 2.
If you had two full Personal Allowances, too little tax could be collected.
HMRC therefore normally allocates your allowance across your PAYE income sources.
How does HMRC tax two jobs?
Usually, one employment is treated as your main source of income.
Your Personal Allowance may be allocated against that job.
A different tax code can then be applied to the second job.
For example:
Main job
Salary: £30,000
Tax code: 1257L
Second job
Salary: £6,000
Tax code: potentially BR
Under this arrangement, your Personal Allowance is being used against the main employment while the second job is taxed separately.
The precise codes HMRC uses depend on your overall circumstances.
What does BR mean on a second job?
BR means the income from that particular employment is taxed at the basic rate without a Personal Allowance being allocated against it.
For taxpayers in England, Wales and Northern Ireland, the basic rate is 20%.
BR is therefore commonly used for second sources of PAYE income.
But BR is not automatically the correct code for everyone with two jobs.
If your combined income pushes you into a higher tax band, taxing all of the second job at 20% could result in insufficient tax being collected.
An example
Suppose you earn:
Job 1: £35,000
Job 2: £8,000
Total employment income:
£43,000
You still have one Personal Allowance.
Assuming the standard allowance applies and there are no other adjustments, your combined income remains within the basic-rate band for a taxpayer in England, Wales or Northern Ireland.
HMRC may therefore allocate your allowance against the main job and tax the second job using BR.
But your exact tax codes should still be checked.
What if both jobs give you 1257L?
This could be a warning sign.
If both employers apply the full standard Personal Allowance, you could effectively receive the tax-free allowance twice through PAYE.
For example:
Job 1 uses 1257L.
Job 2 also uses 1257L.
Unless there is a specific reason for the codes HMRC has issued, too little tax could be deducted during the year.
HMRC may eventually identify the underpayment and recover it later.
Do not assume that a larger-than-expected payslip means the tax calculation is correct.
Can HMRC split your Personal Allowance?
Yes.
Your Personal Allowance does not necessarily need to sit entirely against one employment.
HMRC can sometimes divide allowances between different PAYE income sources.
This might be useful where someone has two relatively small jobs.
For example:
- Job 1 pays £8,000
- Job 2 pays £10,000
Allocating the entire £12,570 allowance to Job 1 could leave some of it unused while Job 2 is taxed.
HMRC may therefore adjust the tax codes to produce a more appropriate overall PAYE calculation.
What if your second job pushes you into higher-rate tax?
This is where people can be caught out.
Suppose you earn:
Main job: £48,000
Second job: £10,000
Combined employment income:
£58,000
For a taxpayer in England, Wales or Northern Ireland with the standard Personal Allowance, some income would fall above the £50,270 higher-rate threshold in 2026/27.
That means some income may be taxable at 40% rather than 20%.
If the second employment is simply taxed entirely using BR at 20%, PAYE may not collect enough tax.
HMRC can adjust your tax codes to account for this.
What does D0 mean?
You might see D0 on one of your jobs.
D0 generally means that all income from that particular PAYE source is being taxed at the higher rate.
This can make sense where your allowances and basic-rate band are already being used against another employment.
There is also D1, which generally applies the additional rate to all income from that particular source.
A D0 or D1 code does not necessarily mean HMRC has made a mistake.
It depends on your combined income.
Scotland is different
Scottish taxpayers have different Income Tax bands and rates for employment income.
That means examples based on the England, Wales and Northern Ireland thresholds should not automatically be applied to someone who is a Scottish taxpayer.
Scottish tax codes generally include an S prefix.
Your combined income across both jobs still matters, but the applicable bands differ.
Do you pay National Insurance across both jobs?
National Insurance works differently from Income Tax.
Income Tax generally considers your overall taxable income.
Employee National Insurance is normally calculated separately for each employment through payroll.
This can create situations where someone with two jobs pays a different amount of National Insurance from someone earning the same total salary from one job.
The exact position depends on earnings from each employment and whether the employments are connected in a way that requires earnings to be aggregated.
Example: two part-time jobs
Suppose two people each earn the same total annual amount.
Person A
One job paying £30,000.
Person B
Two separate jobs paying £15,000 each.
Their overall Income Tax position may be broadly similar once allowances and tax bands are applied correctly.
But their National Insurance calculations can differ because NI is generally assessed separately in each employment.
This is one reason you should not assume two people with identical total salaries will always have identical deductions.
What if one job is very small?
You still need to consider it.
A small second job may only generate a few thousand pounds per year, but that income forms part of your overall tax position.
If your main employment already uses your Personal Allowance, the second income may be taxable from the first pound.
This often surprises people who expect the second job to have its own tax-free allowance.
What happens when you start the second job?
Your new employer will need information to operate PAYE.
If you do not have a P45 because you are keeping your existing job, you will normally complete a starter declaration.
One of the questions concerns whether you currently have another job or receive a pension.
Answer this accurately.
Providing incorrect starter information can contribute to the wrong tax code being operated.
Why might you be put on emergency tax?
HMRC or your employer may not initially have enough information to determine the correct PAYE treatment.
You could temporarily receive a tax code containing:
- W1
- M1
- X
These are non-cumulative treatments.
Once HMRC has sufficient information about your employments, the code may be updated.
If it does not correct itself, investigate rather than leaving it for months.
What if you leave your main job?
Your tax-code allocation may need to change.
Suppose you originally have:
- Main job: £35,000
- Second job: £8,000
Your Personal Allowance is primarily allocated against the £35,000 job.
You then leave that employment but continue with the £8,000 job.
If the second job continues using BR, you could unnecessarily pay basic-rate Income Tax even though your annual income may now be below your available Personal Allowance.
HMRC should eventually update the position, but checking promptly can prevent avoidable deductions.
What if your second job becomes your main job?
Again, review your tax codes.
HMRC does not necessarily know immediately which employment you now consider your primary source of earnings.
Check that:
- Old employments have been closed correctly
- Estimated annual incomes are sensible
- Your Personal Allowance is allocated appropriately
This can usually be reviewed through your HMRC Personal Tax Account or HMRC app.
Can you get a tax refund?
Potentially.
If too much Income Tax has been deducted because of incorrect PAYE codes, you may be entitled to a refund.
Sometimes the correction happens automatically during the tax year after HMRC updates your code.
In other cases, HMRC may reconcile the position after the tax year ends.
The outcome depends on:
- The codes used
- Your actual annual income
- When the mistake was corrected
- Whether you complete Self Assessment
Keep your payslips and P45s.
What if you have paid too little tax?
HMRC may also discover an underpayment.
This could happen because:
- Both jobs used too much Personal Allowance
- Your combined income crossed a higher-rate threshold
- HMRC underestimated one salary
- A previous employment remained incorrectly recorded
- Other taxable income was not taken into account
HMRC may then adjust your tax code or issue a tax calculation.
Catching the problem early can reduce the risk of an unexpected bill later.
Does your second employer know about your first job?
Your tax code gives payroll the information needed to calculate deductions, but your employer does not receive a complete breakdown of your personal tax affairs simply because you have another job.
However, there is a separate employment issue to consider.
Your employment contract may contain rules about:
- Second jobs
- Conflicts of interest
- Working for competitors
- Confidentiality
- Working hours
Tax rules do not override your employment contract.
Do you need to complete Self Assessment because you have two jobs?
Not automatically.
Having two PAYE employments by itself does not necessarily mean you need a Self Assessment tax return.
PAYE can often deal with the tax due.
However, Self Assessment may be required because of other circumstances, such as:
- Self-employed income
- Property income
- Significant untaxed income
- Capital gains
- Other circumstances requiring a return
HMRC provides an online checker if you are unsure whether you need to submit one.
What if your second income is self-employed?
That is different from having two PAYE jobs.
For example:
- £30,000 PAYE salary
- £8,000 profit from freelance work
Your employer deals with the salary through PAYE.
The freelance activity may create separate:
- Record-keeping obligations
- Income Tax liabilities
- National Insurance considerations
- Self Assessment requirements
- Making Tax Digital obligations where relevant
Your employment income and self-employed profits ultimately interact when your overall Income Tax liability is calculated.
Merranti’s guide to tax when you have multiple income sources explains this wider position.
What if you have a job and a pension?
The same basic problem can arise.
You still only have one Personal Allowance.
HMRC may allocate allowances and tax codes across:
- Employment
- Private pension
- Workplace pension
The State Pension can also affect PAYE calculations because it is taxable even though tax is not normally deducted directly from the State Pension itself.
This can result in a lower tax-free allowance being shown against another PAYE source.
Check HMRC’s estimated income
One of the most useful things you can do is check what HMRC thinks you will earn from each job.
Suppose HMRC estimates:
Job 1: £40,000
but you will actually earn:
£28,000
That incorrect estimate can affect how your tax codes are constructed.
The same problem can happen if an old job remains listed as active.
Compare HMRC’s records against:
- Employment contracts
- Payslips
- Expected annual salary
- Leaving dates
Keep your documents
If you work multiple jobs, retain:
- Payslips
- P45s
- P60s
- Tax-code notices
- Employment records
- HMRC correspondence
These make it much easier to check your total pay and tax deducted.
At the end of the tax year, compare your P60 figures across all current employments rather than looking at each job in isolation.
Frequently Asked Questions
Do I pay more tax because I have two jobs?
Not simply because there are two jobs. Income Tax is based on your overall taxable income and applicable allowances and rates.
Do I get £12,570 tax-free from each job?
No. The standard Personal Allowance applies to your overall income, not separately to every employment.
Why is my second job on BR?
BR generally means that income from that job is being taxed at the basic rate without a Personal Allowance allocated to it.
Is BR always correct for a second job?
No. It depends on your combined income and circumstances. Higher earners may require a different treatment.
Can HMRC split my Personal Allowance between two jobs?
Yes. HMRC can allocate allowances across different PAYE sources where appropriate.
Do I need Self Assessment if I have two jobs?
Not necessarily. Two PAYE jobs alone do not automatically require a tax return.
Can I get a refund if my second job was taxed incorrectly?
Potentially. If PAYE resulted in too much Income Tax being deducted, HMRC may correct the position or issue a refund.
Final thoughts
Having two jobs does not give you two separate tax-free allowances.
The most important thing is making sure HMRC has accurate information about:
- Both employments
- Expected income from each
- Which jobs have ended
- Your overall income
- Any other taxable income
Then check the tax code appearing on each payslip.
If one job has 1257L and another has BR, that may be entirely reasonable.
If both jobs appear to be giving you a full Personal Allowance, or your combined income has moved into a higher tax band, it is worth checking more closely.
At Merranti Accounting, we help individuals understand PAYE, multiple income sources and more complicated personal tax positions.
Contact Merranti Accounting if you need help understanding whether the correct amount of tax is being deducted.
Written by Jack Smith MAAT
Senior Client Manager, Merranti Accounting
Jack is an AAT-qualified accountant with more than 12 years of experience supporting individuals, sole traders and owner-managed businesses. His work covers accounts, taxation, forecasting and practical financial advice, including helping clients understand situations where income comes from multiple sources.
Author image: Use Jack’s existing Merranti headshot.
