Social welfare payments will increase by €12 per week starting from Monday.
There are also increases to disability and care allowances.
The Department of Social Protection the increase to cost an additional €1 billion.
The new measures will come into effect from next week, and include the threshold expanding for the Working Family Payment by €40.
The fuel allowance is also being extended to 81,000 more households.
Recipients of the Disability Allowance and Blind Pension will be entitled to €25 more per week.
Parents or guardians of children with severe disabilities will see their monthly rate increase by €20.50.
There is also a €12 weekly increase to core social welfare payments, with over 1.5 million people set to benefit.
