The agency which borrows money on behalf of the State has raised another €1.5 billion through the sale of Government bonds on international markets.
The cost of borrowing the money was slightly lower than in last month's auction.
The National Treasury Management Agency sold €500m of bonds due to be re-paid in 2014 and €1 billion of 10-year bonds to mature in 2020. The interest rate demanded by investors for 10-year bonds was 5.386%.
Though this is slightly lower than last month's 5.537%, it is still around three percentage points higher than the rate demanded for the equivalent German 10-year bonds.
Central Bank chief warns on borrowing costs
The NTMA says it has now completed 99% of its borrowing programme for this year, which was aimed at raising €20 billion.
The NTMA said it was satisfied at the outcome, as it showed that appetite for Irish bonds remained strong despite market volatility, Total bids for the bonds were 3.4 times the amount on offer.
The agency's deputy director of funding and debt management Anthony Linehan said the spread over German bonds had widened because the rates demanded for these bonds had fallen to their lowest level in decades.
Mr Linehan also told a conference call he expected Ireland to need to raise €25 billion for 2011. This would include a budget deficit of €18 billion and a likely €2.5 billion to help fund anglo Irish Bank. In addition, a bond worth €4.4 billion has to be re-paid next year.
