The Revenue Commissioners are stepping up efforts to bring in unpaid taxes.
Six firms of solicitors have been appointed to represent Revenue in court cases where they are pursuing outstanding tax, interest and penalties.
The work will involve debt collection proceedings in the district, circuit and high courts.
The solicitors are expected to have to deal with up to 7,000 cases each year.
This will be in addition to the 44,000 cases referred each year to Revenue sheriffs.
Last year solicitors for Revenue took over 6,500 cases which brought in €65m.