The Tories demanded action after the Government's own figures show there were 179,482 non-EU migrants with settled status claiming the benefit in December 2024.
The claimant total stood at a provisional 8.40million in December 2025 - up from 7.36million a year earlier, according to new Department for Work and Pensions data.
The number claiming Universal Credit (UC) because of their health has soared by 41 per cent in the year to September 2025 - increasing by 933,000 people to a record 3.2 million.
Ms Reeves was accused of caving in to Labour MPs by announcing that parents will once more be allowed to claim Universal Credit and tax reductions for their third or subsequent children.