Figures released by the Local Government Management Agency to RTÉ this afternoon show that this week alone more than €8m has been collected by local authorities in Non Principal Private Residence payments.
So far this month the figure is €18m.
Since its introduction the NPPR has yielded €434m to the State.
Earlier this week it emerged that property owners who have difficulty paying the tax may be given terms that would make it easier for them to pay.
However, the LGMA said that people who had genuine difficulty paying the NPPR should contact their local authority by today.
It has also advised that they may have to provide proof of financial hardship.
Property owners who are liable for the full five years of the charge now owe their local authority just over €4,200.
From Monday that charge will increase to more than €7,200 as late payment penalties will apply.