The first instalment of the £650 for qualifying low income households in England, Wales, Scotland and Northern Ireland will land in bank accounts from 14 July 2022, the DWP has confirmed.
An initial automatic instalment will be £326 on 14 July 2022, with the rest of the payment to follow in a second instalment in the autumn.
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According to the UK Government, the payments are designed to be deliberately slightly unequal to "minimise fraud risks from those who may seek to exploit this system".
The eligibility date for the second instalment will be announced 'soon'.
In total, millions of households will receive at least £1,200 from the government this year to help cover rising costs.
Support includes the direct payment of £650 for over 8 million households on benefits, a separate £300 payment for pensioners, and a £150 payment for disabled people, which can be paid on top of the £650 payment.
There will also be a payment of £400 for all households to help with energy bills, and an extra £150 for properties in Council Tax bands A-D.
Chancellor of the Exchequer, Rishi Sunak said: "We have a responsibility to protect those who are paying the highest price for rising inflation, and we are stepping up to help.
"In July over 8 million people will get their first £326 payment to help with rising prices, as part of a package worth at least £1,200 for vulnerable families. I said we would stand by people when they needed help, and we are."
