Irish residents – made up mainly of companies and institutions – had an outstanding debt of €867 billion by the end of last year, according to new figures from the Central Bank.
The figure - relating to outstanding debt securities issued - was 5% lower than a year ago, according to the authority.
Outstanding long-term Government debt made up more than €111 billion of that total, representing a 26% year-on-year.
However market-based debt financing for the banking sector was 18% lower at €68.9 billion.
Nearly a quarter of this amount will fall due in the next 12 months, according to the Central Bank figures.
In the non-financial corporations sector, debt securities issued remained static at €6.9 billion, with 4% of that set to fall due in the next 12 months.