You can apply to get a Universal Credit payment to cover up to 1 month before you started your claim - this is called 'backdating'. You'll need a good reason for not claiming earlier - if you're in a couple, you'll both need a good reason.
What is good reason for backdated Universal Credit?
Here are some examples of 'good cause' that we would consider to backdate your claim: The death of a close relative. You or a member of your household was in hospital, seriously ill, under stress or under emotional pressure which led to a delay in making your claim.
How long does it take to get backdated Universal Credit?
When you make a claim, your tax credits are usually backdated automatically by up to 31 days. You do not have to do anything.