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How far back can Carer's Allowance be backdated?

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UKUpdated 6 October 2026 · Written by BuyMeWhiskey Editorial Team · How we check facts

Carer's Allowance can normally be backdated up to 3 months, but if you claim within 3 months of the person you care for being awarded a qualifying benefit such as PIP daily living, it can go back to when that benefit became payable.

Claiming now? Apply on GOV.UK and use the 'when do you want your Carer's Allowance to start' question to ask for backdating.

Claim Carer's Allowance on GOV.UK

The normal limit: 3 months

GOV.UK says you can backdate a Carer's Allowance claim by up to 3 months. Citizens Advice adds that you don't have to give a reason for claiming late. You only get paid for the weeks in those 3 months when you met all the conditions. There's a box on the claim form asking when you want your Carer's Allowance to start, and that's where you ask for backdating.

For 2026/27, Carer's Allowance is £86.45 a week, so 3 months of backdating is worth roughly 13 weeks, or about £1,124.

When it can go back further

There's an important exception for people whose caring started while the person they look after was still waiting for a disability benefit. Under regulation 6(33) of the Social Security (Claims and Payments) Regulations 1987, if you claim Carer's Allowance within 3 months of a decision awarding a qualifying benefit to the person you care for, your claim is treated as made from the start of the benefit week in which that award became payable. That can be much more than 3 months earlier, for example when a PIP claim took months to decide or was only awarded on appeal.

The timing is strict. In a January 2025 Upper Tribunal case, a carer claimed Carer's Allowance 11 days before a tribunal improved the cared-for person's PIP award. The judge decided the 3-month window starts with the decision, so a claim made before it didn't count for the extra backdating. If you claimed early and were refused, or only partly paid, and the qualifying benefit is later awarded or increased, make a new claim within 3 months of that new decision.

Which benefits count as qualifying benefits

The person you care for must get one of these, among others:

the daily living component of Personal Independence Payment (PIP)
the middle or highest care rate of Disability Living Allowance
Attendance Allowance
Armed Forces Independence Payment, or Constant Attendance Allowance at the required rate
Scottish equivalents such as Adult Disability Payment (daily living), Child Disability Payment (middle or highest care rate) or Pension Age Disability Payment

The PIP mobility component on its own doesn't qualify.

You must have met the conditions for the whole period

Backdating only covers weeks when you were eligible. For each of those weeks, you must have:

spent at least 35 hours caring
earned £204 a week or less after tax, National Insurance and allowable expenses (the 2026/27 limit)
not been in full-time education or studying 21 hours a week or more
been aged 16 or over and met the residence rules

Weeks when your earnings went over the limit can't be paid.

If you get State Pension

You can't get both in full. If your State Pension is £86.45 a week or more, you won't be paid Carer's Allowance. But it's still worth claiming, because the award, known as "underlying entitlement", can increase Pension Credit.

Check the effect on the person you care for

Carer's Allowance can affect other benefits that you and the person you care for get. For example, Citizens Advice notes that someone still on income-related ESA can't get a premium while you're getting Carer's Allowance. Talk it through before you claim, and get advice if you're unsure.

If backdating is refused

Ask for a mandatory reconsideration, usually within one month of the decision. Give the date of the qualifying benefit decision, the date it became payable, and the date you claimed. If you live in Scotland, you apply for Carer Support Payment from Social Security Scotland instead, and its rules may differ.

Aisha's backdated Carer's Allowance at £86.45 a week

Worked example

Aisha cares for her father for more than 35 hours a week and doesn't work. He claimed PIP in spring 2026 and was refused, but on Tuesday 1 September 2026 the DWP changed its decision and awarded the daily living component, payable from Monday 13 April 2026.

Her deadline: to use the special rule, she has to claim within 3 months of 1 September, so by 1 December 2026.
She claims on 15 October 2026 and asks for her claim to start from when her father's PIP became payable.
Backdated period: 13 April to 15 October is about 26 weeks. At £86.45 a week, that's 26 × £86.45 = £2,247.70.
Without the special rule, she'd only get 3 months, about 13 weeks: 13 × £86.45 = £1,123.85. Claiming in time is worth an extra £2,247.70 − £1,123.85 = £1,123.85.

If she'd waited until January 2027, she'd have missed the 3-month window and could only get the normal 3 months of backdating.

Can Carer's Allowance be backdated more than 3 months?#

Yes, if you claim within 3 months of the decision awarding a qualifying benefit, such as PIP daily living, to the person you care for. Your Carer's Allowance can then start from when that benefit became payable, even if that was much earlier. You still have to have met all the conditions for the whole period.

How do I ask for Carer's Allowance to be backdated?#

Use the question on the claim form that asks when you want your Carer's Allowance to start, and give the earliest date you were eligible. If you're relying on a recent PIP, DLA or Attendance Allowance award, give the decision date and the date it became payable. You don't have to give a reason for an ordinary 3-month backdate.

Can Carer's Allowance be backdated if PIP was awarded on appeal?#

Yes. A tribunal decision awarding the qualifying benefit starts a new 3-month window. A 2025 Upper Tribunal case confirmed the window starts with the decision, so claim after it, not before, or claim again if your earlier claim was refused.

Does backdated Carer's Allowance affect my State Pension?#

You can't be paid both in full. If your State Pension is £86.45 a week or more, you won't receive Carer's Allowance, but an underlying entitlement can increase Pension Credit. It's worth claiming and asking for backdating anyway.

What can I do if Carer's Allowance backdating is refused?#

Ask for a mandatory reconsideration, usually within one month of the decision letter. Set out the qualifying benefit decision date, when it became payable and when you claimed. Carers UK and Citizens Advice can help you prepare it.

Keep reading

Sources

Figures checked against these sources on 6 October 2026. If a rule changes, we update the page and its date.

General information, not personal financial advice. Rules depend on your circumstances; check the official source or speak to a regulated adviser before acting.