Martin Lewis’ MSE urges anyone that earns less than £40k per year to check if they’re eligible for free money

Free money! Possibly, let's not get your hopes up prematurely.

One of the best websites you can visit in this currently crumbling ecosystem of an internet is Martin Lewis' Money Saving Expert site.

It's packed full of handy advice on handling your finances and contains the sort of knowledge nobody else ever bothers to tell you.

You could be eligible for a bunch of stuff or able to access services, rebates and other things, but if you don't know they're there then you'll never go near that money.

This time around his site has produced a handy guide for anyone living in a household that earns under £40,000 and a way to check if there's money you'd be allowed to claim.

His website has more advice for you, and you could be able to claim some money. (David M. Benett/Alan Chapman/Dave Benett/Getty Images))

The MSE site says there's an estimated £23 billion in benefits which goes unclaimed by people who would by right be allowed to access that money.

They've got a benefits calculator on their site where you can punch in your relevant details and see whether there's any financial help you could claim.

The worst it can tell you is that you're not entitled to anything and you're back where you started 10 minutes previously, while for all others, it'll let you know there's more money you could access to help hard times go a little easier.

On the site, it says they reckon it's 'worth checking whether your qualify' if your household income is below £40k a year.

Money Saving Expert stresses that 'benefits are not just for the unemployed', writing: "State support is designed to help those in a range of situations, from those struggling on a low income, to new families, to those with long-standing medical conditions.

"Even someone earning a high salary could be eligible for some help."

There could be money you're entitled to but didn't know you could claim. (Getty Stock Photo)

Martin and his team are a very helpful bunch and just a few days ago, the man himself was chatting about your student loans, if you've got them.

He explained that many people who leave university can claim they've unwittingly overpaid their student loans and could be due some money back as a result.

One of the biggest reasons for overpaying is if someone made repayments despite not earning enough above the threshold.

Elsewhere, Martin Lewis has continued his crusade to help motorists who might have overpaid for their cars without knowing about it.

His site has a tool which you can use if you bought a car within a certain window of time, as you might have been paying for Discretionary Commission Arrangements without realising it.