The state spent almost €500 million euro, in the space of five years, on the salaries of teachers in private schools.
The bill for last year was over €104 million, according to freedom of information figures.
The bill for two schools in Dublin was over €4 million and it exceeded €3 million in five other schools around the country.
It covered 51 fee-paying schools across the state where the Department of Education pays the salaries of teachers.
In the 2021-2022 school year, this cost the state €104.3 million.
Which is €13,000 euro more than the previous year, but €7 million more than in the 2019-2020 school year.
The highest amount last year was paid to teachers in St Andrew's College in Dublin, at almost €4.2 million.
Another school in south Dublin, Blackrock College, was the next highest at just over €4 million.
Both of these schools had more than 1,000 students during the year.