What Does CBR Tax Code Mean In The UK?

Last Updated: 26 October 2026

Seeing CBR on your payslip can be confusing, particularly if you have recently taken a second job, started receiving a pension or moved to Wales.

CBR is a PAYE tax code used for Welsh taxpayers. It means the entire income from the job or pension carrying that code is taxed at the Welsh basic rate, without a Personal Allowance being allocated against that particular income source.

For the 2026/27 tax year, the Welsh basic rate is 20%. CBR is therefore commonly seen where HMRC has already allocated someone’s tax-free Personal Allowance to another job or pension.

What Does CBR Mean On Your Payslip?

The easiest way to understand CBR is to separate the letters.

• C – Your income is being taxed using the Welsh Income Tax rates because HMRC considers you a Welsh taxpayer
• BR – All income from that particular job or pension is taxed at the basic rate

HMRC describes CBR as a code where tax is deducted from all income at the basic rate in Wales, and states that it is normally used for a second job or pension.

This is different from a standard tax code containing numbers, such as C1257L.

The numbers in a tax code normally indicate how much tax-free income is being allocated to that employment.

CBR contains no numerical allowance, so the income attached to it is taxed from the first pound.

Official HMRC guidance confirming that CBR taxes all income at the basic rate in Wales and is usually used for a second job or pension.

When Was The CBR Tax Code Introduced?

The Welsh element of the CBR code dates from 6 April 2019, when Welsh Rates of Income Tax became operational.

From that date, the Welsh Government gained the power to set Welsh rates of Income Tax.

Welsh taxpayers also began receiving PAYE tax codes starting with C, representing Cymru.

The underlying BR tax code existed before Welsh Income Tax devolution.

What changed in April 2019 was the addition of the Welsh C prefix, creating codes such as CBR, C0T, CD0 and CD1 for Welsh taxpayers.

Timeline Of CBR And Welsh Tax Codes

The Welsh Government has so far continued setting its contribution to each main Income Tax band at 10p, maintaining overall rates equivalent to England and Northern Ireland.

Welsh Government confirmation that devolved Welsh Income Tax began on 6 April 2019 and Welsh taxpayers received tax codes beginning with C.

Why Are You Given A CBR Tax Code?

Receiving CBR does not automatically mean anything has gone wrong.

HMRC commonly uses the code where someone has more than one PAYE income source and their Personal Allowance is already being used elsewhere.

Common reasons include:

• Having A Second Job: Your main employment may already receive your Personal Allowance
• Receiving More Than One Pension: One pension may carry your allowance while another is taxed using CBR
• Starting Additional Employment: HMRC may allocate your allowances to what it considers your main employment
• Changes To Your Income Sources: Starting or stopping jobs and pensions can change how allowances are distributed
• HMRC Records Being Updated: A temporary mismatch between employers and HMRC can sometimes result in an unexpected code

For someone with several income sources, HMRC considers the overall tax position when deciding which code should apply to each source.

This is why CBR on a second job can be perfectly correct even when a standard tax code appears on the main job.

If the code appears unexpectedly, it is worth checking whether your tax code is correct rather than assuming your employer has made an error.

How Much Tax Do You Pay With A CBR Tax Code?

For the 2026/27 tax year, the Welsh Income Tax bands for someone with the standard £12,570 Personal Allowance are:

The basic rate applies to taxable income from £12,571 to £50,270 where the standard Personal Allowance is available.

However, CBR itself does not apply the Personal Allowance to that income source.

It instructs payroll to deduct the Welsh basic rate from all income paid through that employment or pension.

For example, if a second job pays £1,500 per month and carries CBR:

This simplified example only illustrates Income Tax. National Insurance, pension contributions, student loan repayments and other deductions may also affect take-home pay.

A CBR code controls PAYE Income Tax. It does not by itself determine National Insurance contributions.

How Has The CBR Tax Code Changed Over Time?

The basic meaning of CBR has remained relatively stable since Welsh tax codes were introduced.

CBR continues to mean that the relevant income source is taxed entirely at the Welsh basic rate.

What can change is the rate represented by that code because the Welsh Government has the power to make annual decisions over Welsh Income Tax rates.

For 2026/27, the Welsh Government decided not to change Welsh Rates of Income Tax.

The overall rates therefore remain:

• Basic Rate – 20%
• Higher Rate – 40%
• Additional Rate – 45%

The standard Personal Allowance also remains £12,570 for 2026/27.

This means CBR currently results in a 20% deduction from all taxable pay associated with that code.

The important point is that CBR does not guarantee a permanent 20% rate for every future tax year.

If Welsh Income Tax policy changes, the rate represented by CBR could also change.

Is CBR An Emergency Tax Code?

No. CBR on its own is not an emergency tax code.

This is an important distinction because BR and CBR are sometimes incorrectly described as emergency codes.

HMRC says an emergency tax code will normally end with:

• W1
• M1
• X
• NONCUM

If none of these appears, HMRC states that the taxpayer is not using an emergency tax code.

CBR simply tells the employer or pension provider to apply the Welsh basic rate to the entire income from that source.

A code operated with an M1, W1, X or NONCUM marker is different because payroll calculates tax using only the current pay period instead of looking cumulatively at the tax year.

This distinction is also important with ordinary BR codes.

The detailed explanation of whether BR is an emergency tax code applies the same principle. BR or CBR alone does not automatically indicate emergency taxation.

CBR Vs BR And Other Common Welsh Tax Codes

CBR is only one of several codes that can appear for Welsh taxpayers.

HMRC commonly uses CBR, CD0 and CD1 where someone has more than one job or pension.

For example, someone whose main salary already takes them into the higher-rate band might have another employment taxed using CD0 rather than CBR.

The same principle applies outside Wales through codes such as D0. Someone comparing higher-rate secondary income can also see how the D0 tax code works.

Which code is correct depends on a person’s combined income, allowances and other circumstances.

How To Check And Fix A CBR Tax Code?

You should not try to calculate the correct code based only on one payslip. HMRC may be allocating allowances between several jobs or pensions.

First check:

1. Your Main Employment: Confirm which job is receiving your Personal Allowance
2. All Jobs And Pensions: Make sure HMRC has the correct information for every PAYE income source
3. Your Estimated Income: Incorrect estimates can affect how HMRC allocates tax codes
4. Your Home Address:  The C prefix depends on Welsh taxpayer status, so HMRC needs the correct address
5. Your P45 Details: Recently changing jobs can affect PAYE records
6. Your HMRC Account: Compare the tax code displayed by HMRC with the one shown on your payslip

If you have moved to or from Wales, updating your address is particularly important.

Welsh Income Tax generally applies where Wales is your main UK residence for the relevant tax year.

If HMRC determines that CBR is incorrect, it can issue a replacement tax code to your employer or pension provider.

What If You Have Overpaid Tax?

An incorrect CBR code can result in overpayment where, for example, your Personal Allowance should have been allocated against that income but was not.

When HMRC changes the code and has enough information to calculate your position, it can instruct your employer or pension provider to repay overpaid PAYE through your wages or pension.

For monthly-paid taxpayers, HMRC says the updated code should normally be used on the next pay or the following pay after the employer receives it.

If the tax year has already ended, HMRC may reconcile your tax position and issue a P800 calculation.

Anyone receiving one can check whether a GOV.UK P800 refund is legitimate before submitting financial information.

What Future Changes Could Affect CBR Tax Codes?

The Welsh Government reviews Welsh Rates of Income Tax as part of its budget process each year.

For 2026/27, it chose to maintain the Welsh rates at 10p in each main band. Combined with the UK component of Income Tax, this leaves the headline Welsh rates at 20%, 40% and 45%.

As of 26 October 2026, the Welsh Government has not yet published its final Income Tax decisions for 2027/28.

Its 2027/28 Draft Budget is scheduled for 17 November 2026, following the UK Autumn Budget scheduled for 28 October 2026.

These forthcoming decisions could provide more information about Welsh rates for the next tax year.

There is also a wider change involving property income.

The Finance Act 2026 provides for separate property income tax rates from the 2027/28 tax year.

UK legislation sets property rates at 22%, 42% and 47%, while provisions also allow for Welsh property rates to be set separately once the relevant Welsh powers are brought into force.

HMRC and the Welsh Government have been preparing for this development.

This does not mean ordinary employment income under CBR will automatically change.

CBR remains a PAYE code for income taxed at the Welsh basic rate. However, the wider Welsh Income Tax system is continuing to develop, making annual rate announcements worth monitoring.

Conclusion

CBR is much simpler than it can initially appear.

The C identifies a Welsh taxpayer, while BR means the entire income from that job or pension is taxed at the basic rate.

For 2026/27, this currently means a 20% Income Tax deduction from all earnings attached to the CBR code, with no Personal Allowance allocated to that particular income source.

The code is often correct for people with a second job or additional pension, and CBR alone is not an emergency tax code.

The most important step is to consider CBR alongside all of your jobs, pensions and allowances.

If the code does not reflect your circumstances, checking your HMRC records promptly can prevent continued overpayment or an unexpected tax bill later.

Frequently Asked Questions

Why Is My Second Job On CBR?

Your Personal Allowance may already be allocated to your main job. HMRC can therefore use CBR so all earnings from the second job are taxed at the Welsh basic rate.

Does CBR Mean I Pay 20% Tax?

For 2026/27, yes. The Welsh basic rate is currently 20%, so income from the job or pension carrying CBR is normally taxed at 20% from the first pound.

Does CBR Include A Personal Allowance?

No. CBR does not allocate a tax-free Personal Allowance to that particular income source.

Is CBR A Bad Tax Code?

Not necessarily. It can be completely correct for a second job or pension. It becomes a problem when it does not reflect your actual income and allowance position.

Can CBR Make Me Pay Too Much Tax?

Yes. If HMRC should have allocated some Personal Allowance to the income carrying CBR, taxing everything at 20% could create an overpayment.

Can CBR Make Me Pay Too Little Tax?

Potentially. If your combined income means some of the earnings should fall into the higher or additional-rate bands, basic-rate deductions alone may not collect enough tax.

What Does CBR M1 Or CBR W1 Mean?

The CBR part refers to the Welsh basic rate. M1 or W1 indicates that the code is being operated on an emergency or non-cumulative basis using only the current month or week.

Does CBR Affect National Insurance?

No. A PAYE tax code determines how Income Tax is deducted. National Insurance is calculated separately.

Will HMRC Change CBR Automatically?

HMRC may change your code when it receives updated employment, pension or income information.

However, you should check your tax record yourself if you believe the code is wrong rather than waiting for an automatic correction.