Martin Lewis has warned one million pensioners could be missing out on £3,000 worth of pension credit.
The MoneySavingExpert founder urged retirees to check their eligibility to make extra savings while the government prepares to revoke free TV licences for over-75s next month.
In the finance expert's weekly MoneySavingExpert email, he said one million families are currently missing out on pensions credit - and many of them are struggling financially as a result.
If you're over state pension age, live in the UK, and earn less than £173.75 a week as a single person or £265.20 a week as a couple, including pensions, savings and work, then you could be entitled to a top up.
And those who qualify may be able to unlock thousands of pounds worth of additional savings, such as the free TV licence for over-75s, reports the Mirror.
From August 1, free TV licences will only be available to those who claim pension credit - so now is the time to check if you could be eligible.
The BBC already announced the free service would be scrapped but the broadcaster delayed proceedings by two months in the wake of the coronavirus pandemic.
This means it's now due to be axed next month.
As well as free access to TV, those who claim pension credits may also get a council tax reduction, £25 a week off their gas bills, free dental care and a £140 warm home discount to cover their winter bills.
Those who wear glasses may also qualify for vouchers worth up to £215 as well as housing benefit to help cover rent payments.
The scheme, which is run by the Department for Work and Pensions, is not automatic - meaning you will have to apply and be assessed first.
It's largely available to those who live in the UK, have reached state pension age - though your partner must be at state pension age too.
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Those who have less than £10,000 in savings are eligible and if you have more, you may get a reduced payment instead.
You can apply via Gov.uk if you've already claimed your state pension, but otherwise you'll need to phone the Pension Service on 0800 99 1234.
Martin said: "From August, free TV licences for over-75s will only be available to households where someone gets Pension Credit.
"But more than a million of society's poorest families miss out on the benefit despite being eligible."
