About 7,000 families in east London are set to benefit from a council's universal school uniform grant.
The £150 will be available to children who are entering their first year of primary or secondary school, if their families have a household income of £50,350 or less.
Lutfur Rahman, mayor of Tower Hamlets, said it would "go some way" to support children in the borough, while Mohi, a local parent, said school uniform costs were a "matter of worry" for himself and his family.
It comes as the government's Children's Wellbeing and Schools Bill looks to limit the number of branded uniform items a school can require, to ease the financial burden on parents.