The figures for 2020 show an increase of over €81 million on the numbers for 2019.
The Housing Assistance Payment is a form of social housing support provided by all local authorities.
Under the scheme, part of a tenant's rent is paid by the state, which makes payments to landlords every month.
According to freedom of information figures, the exchequer paid landlords nearly €355 million under the scheme in 2019.
This rose by more than a fifth last year, to nearly €436 million euro.
In the final quarter of last year, nearly 60,000 tenants were availing of the scheme - up nearly 7,300 on the previous year.
Dublin's four local authorities paid out €212 million under the scheme last year, which is nearly half of the country's total amount.
€45 million was paid in Cork, and nearly €26 million in Louth.
Two Arrested After Greystones Gym Burglary
Wicklow TD Says Local Radio Is “Totally Underfunded” With Independent Sector Share Dwarfed By RTÉ
From TikToks In Bray To US Shows: Florence Road Win Olivia Rodrigo’s Praise
East Coast FM Audience Grows As Radio Keeps Wicklow Connected
Oisín McConville Bolsters Coaching Backroom Team With Two New Faces