Around 1.3 million social welfare recipients will receive a double payment this week.
Up to €342m will be paid out to pensioners, carers, people with disabilities, lone parents and low-income families.
Those on Jobseekers Allowance for over 12 months will also qualify for the enhanced payment.
Minister for Social Protection Heather Humphreys said: “Over the past two and a half years, this Government has rolled out unprecedented financial supports to help families and households to deal with the cost of living.
“This is about putting more money back into your pocket and recognising that families continue to feel the pinch, particularly after the Christmas period.”
The double payments were announced as part of the Budget and will include the core weekly rate increases that came into effect at the start of last year.
Most weekly payments went up by €12 per week at the beginning of the year with a range of targeted measures to take effect throughout 2024.