Vale MS Jane Hutt is urging people to get the financial support they're entitled to.
The Welsh Government is leading 'Claim What's Yours', a national benefit take-up campaign, which includes free support and advice to help maximise household incomes.
It's believed around £2 billion of benefits in Wales - such as Carers' Allowance and Personal Independence Payment - goes unclaimed.
The social justice secretary said: "Ensuring people claim what they are entitled to makes a positive difference to families across Wales."
"We’re committed to putting money back into people’s pockets. Whether you’re struggling with daily expenses, managing debt, or unsure about what help is available, there is support for you in claiming the financial help you’re entitled to."
Since its launch five years ago, the Single Advice Fund has been offering advice for anyone needing help with securing their financial entitlements. It has helped people across Wales secure an extra £160 million in come and wiped out £43.6 million in debt.
Last year alone, the Claim What’s Yours helpline, which is funded by the Welsh Government and run by local Citizens Advice services, helped 36,800 people resolve over 120,000 financial, housing, and employment issues.
Dylan Jordan, an adviser at Bridgend Citizens Advice, said: "Many people come to Citizens Advice wanting help but not knowing where to start. We check they're getting the money they are entitled to and any urgent support they need right now."
"It might be a food parcel, a fuel voucher, or just a bit of help with the cost of school uniforms through the Welsh Government. We will try our best to help you move forward."
Ministers say they're also working with local councils and other organisations to make benefits and grants such as free school meals and the council tax reduction scheme as simple to claim as possible.
Eleven local authorities are also taking part in a pilot scheme to identify and reach out to people who may not know they're eligible for support.
Cllr Anthony Hunt from the Welsh Local Government Association added: "Ensuring that families and individuals get the benefits they’re eligible for can make a real difference, especially during tough times, like the ongoing cost-of-living crisis."
"By making it simpler for people to access the support they need, we can not only improve the financial well-being of individuals but also strengthen communities across Wales."
“The WLGA is committed to working with local authorities, community groups, and partners to simplify the claims process and help people understand the support available.”
To find out more about eligibility for extra income and how to claim it, call the Claim What’s Yours line for free on 0800 702 2020.
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