There was a total of 45,276 mortgages in arrears by more than 90 days not restructured by the end of November, according to the Department of Finance.
The total number of mortgages in arrears stood at 91,963 at the end of November, which is a decrease of 2,819 mortgage accounts compared with the previous month.
The total number of mortgages in arrears by more than 90 days fell by 1,879 accounts to 64,196 mortgage holders at the end of November.
Moreover, there has been a 27% rise in the number of restructurings since the department first started compiling data in August 2013.
Of the mortgages in arrears by more than 90 days, 14,506 have been classified as permanently restructured, with a further 4,414 classified as restructured on a temporary basis.
Arrears capitalisation is the most common form of permanent restructuring, followed by split mortgages; term extensions; hybrid mortgage; interest modification; and interest-only for a certain period.
The data comes from six banks — AIB, Bank of Ireland, PTSB, ACC, KBC Ireland, and Ulster Bank. These lenders represent 90% of the total market.
There are a total of 691,485 mortgage accounts, with 599,522 not in arrears.
In the buy-to-let sector, there are 31,362 accounts in arrears out of a total of 123,600 mortgages at the end of last November.
Mortgage arrears fell by 786 compared to the end of November. Buy-to-let mortgages in arrears less than 90 days at the end of November was 5,448, which is a 377 drop on the previous month.
There are 25,914 accounts in arrears greater than 90 days, which is a 409 decrease on the previous month.