The UK has paid a striking price for long-term borrowing. An auction of a new UK gilt maturing in 2036 produced an average yield of 5.383%, the highest interest rate recorded on a 10-year bond since 1999.
The UK government issued £4.25bn of the debt through an auction held by the Debt Management Office. Bond investors successfully demanded the 5.383% average yield, setting the central result of the sale and putting the cost of this borrowing in plain view.
This was a new gilt with debt maturing in 2036, giving the auction a long-term focus. The result does not merely record the amount raised; it shows the return investors required before accepting that debt.
A costly result for the government
The £4.25bn auction amount marks the scale of the sale, while the 5.383% average yield shows its price. Those two figures belong together: the UK government raised the stated amount, but investors set the return attached to that borrowing.
The key measure is the yield rather than the headline size of the auction. A larger or smaller figure would describe how much debt changed hands; the 5.383% figure describes the average return demanded by the bond investors who took part.
That rate reached a level not seen on a 10-year bond since 1999. A historical milestone is doing the heavy lifting here, because the auction’s significance comes from the yield’s place in that timeline as much as from the £4.25bn raised.
The Debt Management Office held the auction for the UK government, which issued the bonds. The roles are clear: the office conducted the sale, while the government stands as the issuer of debt maturing in 2036.
Investors remain reluctant to add duration
Evelyne Gomez-Liechti described the auction as “on the weaker side,” linking the result to a continuing reluctance among investors to add duration despite attractive yield levels. Her assessment gives the 5.383% yield a second meaning: a higher return has not removed investor caution.
The comment points to a tension inside the sale. Investors demanded an attractive yield, yet the auction still landed on the weaker side, suggesting that the return available did not fully overcome their reluctance to take on more duration.
That distinction matters because the auction did not fail to conclude. It concluded with investors taking the new gilt at an average yield of 5.383%, while the wider reading of the result remains less comfortable for the issuer.
For the UK government, the practical fact is simple: the £4.25bn of debt maturing in 2036 carries the highest 10-year bond interest rate since 1999. For investors, the same result records a return level they successfully demanded.
The auction concluded on Tuesday 29 September 2026. The update was marked Tue 29 Sep 2026 16.07 BST, after the item was first published at Tue 29 Sep 2026 07.41 BST.
Nothing about the result requires a grander reading than the figures provide. The UK government issued the debt, the Debt Management Office held the auction, investors demanded 5.383%, and the cost reached a level absent from 10-year borrowing since 1999.
