Carer’s Allowance is taxable, but it reaches you with no tax taken off, so if you file a Self Assessment return you report it yourself in the taxable state benefits section. On the paper SA100, that means Box 16 on page 3, labelled “Total of any other taxable State Pensions and benefits.” The figure you enter is the weekly rate multiplied by the number of weeks you were paid during the tax year, and you leave the Christmas Bonus out because it isn’t taxable.1GOV.UK. Income Tax – Tax-free and Taxable State Benefits Many carers, though, never need to fill in a return at all; HMRC often collects any tax owed through a tax code adjustment instead.
Do You Actually Need to File a Return?
Carer’s Allowance on its own does not trigger a Self Assessment requirement for most people. At the 2025/26 rate of £83.30 a week, a full year comes to roughly £4,332, well under the £12,570 Personal Allowance frozen for 2025/26 and 2026/27.2GOV.UK. Benefit and Pension Rates 2025 to 20263GOV.UK. Income Tax Rates and Allowances for Current and Previous Tax Years If that is all you receive, there is nothing to owe and usually nothing to file.
Three routes cover how the tax gets settled when other income puts you over the threshold:
- If you have a job or private pension taxed through PAYE, HMRC will usually adjust your tax code so your employer or pension provider deducts a bit more each pay period to cover the Carer’s Allowance. You may not need to file anything, but check your tax code on your Personal Tax Account at least once a year and after any rate change.
- If HMRC sends you a Simple Assessment letter, it has already worked out the tax. You check the figures and pay what’s shown rather than submitting a return. This is common when your only incomes are state benefits and State Pension.
- If neither of those applies, or if your circumstances put you inside the Self Assessment rules, you file a return.
You generally have to register for Self Assessment if you have self-employment income above £1,000, total income over £150,000, liability for the High Income Child Benefit Charge, or untaxed income that HMRC isn’t already collecting tax on through your code.4GOV.UK. Income Tax Rates and Personal Allowances A full year of Carer’s Allowance sits above the £2,500 untaxed income marker on its own, but if the tax is being collected through your code the income is effectively accounted for. If you are unsure, HMRC’s checker on gov.uk will tell you. The deadline to register is 5 October after the end of the tax year, so for 2025/26 (ending 5 April 2026) that is 5 October 2026.5GOV.UK. Check How to Register for Self Assessment HMRC posts you a Unique Taxpayer Reference so you can file online.
Working Out the Figure to Report
The tax year runs from 6 April to 5 April. Count the weeks you were actually paid Carer’s Allowance in that window and multiply by the weekly rate that applied. At the 2025/26 rate of £83.30, a full year comes to £4,331.60.2GOV.UK. Benefit and Pension Rates 2025 to 2026 The 2026/27 rate is £86.45 a week, giving roughly £4,495 for a full year.6GOV.UK. Proposed Benefit and Pension Rates 2026 to 2027
If you started or stopped claiming partway through the year, only include the weeks you were paid. The Christmas Bonus is not taxable and does not go in.1GOV.UK. Income Tax – Tax-free and Taxable State Benefits
Where the Figure Goes on the Return
On the paper SA100, enter the total in Box 16 on page 3, “Total of any other taxable State Pensions and benefits.” Filing online through HMRC’s service, go to the state pension and benefits section and enter the same total there. Carer’s Allowance sits alongside other taxable state benefits like Bereavement Allowance in that box; the State Pension has its own line.1GOV.UK. Income Tax – Tax-free and Taxable State Benefits
Records to Have Ready Before You File
Because Carer’s Allowance arrives without any tax paperwork attached, you calculate the figure yourself from your payment records. Pull together your bank statements or DWP letters showing the weeks paid, any P60 from an employer showing pay and tax deducted, pension statements for the year, and records of savings interest or rental income if relevant.7GOV.UK. P60 Having the numbers in front of you before you start reduces the risk of a mismatch that prompts HMRC to come back with questions.
Deadlines and Penalties
For the 2025/26 tax year, a paper return must reach HMRC by 31 October 2026, an online return by 31 January 2027, and any tax owed is due on 31 January 2027.8GOV.UK. Self Assessment Tax Returns – Deadlines
Miss the filing deadline and there is an automatic £100 penalty even if you owe no tax. After three months, daily penalties of £10 start (up to 90 days). At six months and twelve months, further penalties of 5% of the tax owed apply, and interest runs on unpaid tax from the due date.9GOV.UK. Self Assessment Tax Returns – Penalties Small bill or not, filing on time is what stops the penalties.
If your Self Assessment liability comes to more than £1,000 and more than 80% of your tax was not collected through PAYE, HMRC may require payments on account: two advance payments toward the following year’s bill, due 31 January and 31 July, each equal to half of the previous year’s liability.
Scotland: Include the Carer’s Allowance Supplement
If you live in Scotland and receive Carer’s Allowance or Carer Support Payment, Social Security Scotland pays an additional Carer’s Allowance Supplement twice a year. For 2026 the payment is £304.65 per instalment, based on qualifying dates in April and October.10mygov.scot. Carer’s Allowance Supplement The supplement is taxable, so add it to your Carer’s Allowance total when filling in the state benefits box. Across a full year it adds roughly £609, which matters if your other income already sits close to the Personal Allowance.
One boundary worth noting: Universal Credit is not taxable and does not go on the return, even though your UC payment is reduced pound for pound by any Carer’s Allowance you receive.11GOV.UK. Carer’s Allowance – Effect on Other Benefits Only the Carer’s Allowance portion counts toward your taxable income.