Before you start — is this the right form, and what's the backdating clock
DS700SP has a narrow eligibility gate of its own, on top of Carer's Allowance's usual conditions. Confirm you're on the right form before working through it.
Only for people already getting State Pension
The form's front page is explicit: 'only use this form to claim Carer's Allowance if you are getting State Pension.'
Anyone not yet getting State Pension should use the standard DS700, or claim online instead.
The carer fills it in, not the person being cared for
'You, the carer, must fill in this form, not the person you provide care for.'
Someone else can complete it on the carer's behalf, but the carer must still sign the declaration personally.
The backdating window
A claim can be backdated to the start date of the disabled person's qualifying benefit — but only if made within 3 months of that benefit's decision date, and only for periods where 35+ hours of care a week were provided.
This is the one genuine deadline in an otherwise open-ended claim: there's no statutory time limit on claiming as such, only this backdating window, and missing it can mean losing money permanently rather than simply claiming from a later date.
Only one carer can be paid per person
If two people care for the same disabled person, only one of you can get Carer's Allowance, Carer Support Payment, or the Universal Credit carer element for looking after them.
If you can't agree between yourselves who claims, DWP decides for you.
DS700SP has a narrow eligibility gate of its own, on top of Carer's Allowance's usual conditions. Confirm you're on the right form before working through it.