Children who qualify for free school meals will also be eligible during school holidays until next spring, Wales' education minister has said.
The provision was adopted for pupils of struggling families in the pandemic, and extended until this summer.
But the Welsh government has set aside £11m to extend the help scheme further, to the end of February 2023 half term.
Jeremy Miles said the decision had been taken - as part of a deal with Plaid - due to the "increasing cost of living".
He made the announcement during a statement in the Senedd about the planned roll-out of universal free school meals to all primary pupils.