Most people will never buy a gilt, but the gilt market still reaches their finances. A gilt yield is the return investors earn for lending to the UK Government, and it is closely watched across the financial system. On 17 September 2026 the Bank of England held Bank Rate at 3.75% and, in the same set of announcements, set out a multi-year plan to unwind the gilts it bought during quantitative easing. This article explains how those pieces fit together and what they do, and do not, tell an ordinary borrower or saver.
What is a gilt, and what does its yield tell you?
The UK Debt Management Office (DMO) defines a gilt as “a UK Government liability denominated in sterling”. A conventional gilt pays the holder a fixed cash payment, called the coupon, every six months until it matures, when the nominal amount is repaid.
The coupon is fixed for the life of the gilt. The yield is not. As the DMO puts it, “as prices rise the investor is effectively paying more for a series of fixed cash flows and so the yield falls”, and if prices fall, the yield rises. The table below uses a simple illustration with a made-up gilt that pays £4 a year per £100 of nominal. It shows the “running yield”, which is just the coupon divided by the price you pay.
| Price paid for £100 nominal | Annual coupon | Running yield |
|---|---|---|
| £110 | £4 | 3.64% |
| £100 | £4 | 4.00% |
| £90 | £4 | 4.44% |
The figures are illustrative arithmetic, not market data. The full “yield to maturity” that the DMO quotes also counts the gain or loss when the gilt is repaid at £100, so a price of £90 lifts that measure by more than the running yield suggests. The direction is what matters: when gilt prices fall, yields rise, and the Government’s cost of borrowing rises with them.
How is a gilt yield different from Bank Rate?
They are related but they are not the same thing. Bank Rate is a single rate set by the Monetary Policy Committee (MPC). On 17 September 2026 the Committee voted 6–3 to keep it at 3.75%, with three members preferring an increase to 4%. The Bank’s website lists the next decision as due on 5 November 2026. The Bank’s target is to keep inflation at 2%, and its inflation page, last updated on 16 September 2026, shows the current inflation rate as 3.1%.
A gilt yield, by contrast, is a price set continuously by buyers and sellers in the market, and it differs by maturity. A gilt that matures in two years and one that matures in thirty can carry quite different yields on the same day, because investors are lending for different lengths of time and weighing different risks. Bank Rate influences those prices, but it does not dictate them.
Why do fixed-rate mortgages care about the gilt market?
The Bank’s own explainer says that when it raises Bank Rate, “banks will usually increase how much they charge their customers on loans and the interest they offer on savings”. It also says that high street rates “depend on more than just the Bank Rate”, including the risk of the loan not being paid back and “for how long you want to take out a loan or mortgage”.
Duration is where the wider bond and swap markets come in. A fixed-rate mortgage is a long-term commitment for the lender, funded largely by shorter-term deposits. A Bank of England staff working paper, updated in August 2025 (its authors stress that their views are not the Bank’s), notes that banks’ “longer-duration assets, such as fixed-rate mortgages, are funded by shorter-term deposit liabilities”, and that to hedge this mismatch “banks take pay fixed swap positions”. The paper does not give mortgage prices, so the next step is our inference: if lenders hedge fixed deals in the swap market, the cost of doing so reflects market pricing for the period covered, not only the Bank Rate in force today.
That would help explain why a fixed deal can be repriced between Bank Rate decisions, and why a borrower whose fixed rate is ending cannot read the next rate from the headline decision alone. How a mortgage rate feeds into your monthly payment has worked examples of what a one-point difference means for a typical loan.
What did the Bank of England announce about its gilts?
From 2009 the Bank bought gilts as part of quantitative easing (QE), holding them in its Asset Purchase Facility (APF). According to the Governor’s letter to the Chancellor of 17 September 2026, the stock peaked at £895bn at the turn of 2022 and has since fallen to £488bn. The reduction, known as quantitative tightening (QT), has been decided one year at a time since 2022. The MPC has now voted to replace that annual process with a multi-year plan.
The key figures in the letter and the MPC’s summary are:
| Element | What the Bank said |
|---|---|
| Gilts still held | £488bn |
| Longest-dated gilts kept to back banknotes | £120bn, maturing between 2049 and 2071, held to maturity |
| Gilts maturing before 2035 | £222bn, not to be sold, held to maturity |
| Gilts still to be sold | £146bn |
| Annual pace of reduction | £46bn on average, to the end of 2034 |
| Annual sales | £20bn a year, alongside maturing gilts |
| Completion | September 2034 |
The three pieces add up: £120bn plus £222bn plus £146bn is £488bn. The letter says the new average pace of £46bn a year compares with £87.5bn a year over the past four years of QT, which included average annual gilt sales of £32bn. So the plan is slower than the recent pace, and it sets out the path years in advance.
The Bank Executive is also considering selling the remaining £146bn to the Government, through the DMO, rather than into the market, subject to agreement with HM Treasury. It says it will announce operational details by April 2027, and that its gilt auctions will pause until then.
Does this change what you pay or earn?
Nobody can say with confidence what a multi-year plan will do to any one household’s rates, and the Bank does not claim to. Its argument is about predictability. The Governor’s letter says that removing uncertainty about future QT “means that the full intended path for QT can be embedded into financial conditions”, leaving QT “in the background” while Bank Rate remains the active tool for adjusting policy. It also sets a “high bar” for changing the plan, in only two circumstances: if movements in Bank Rate alone were not enough to meet the inflation target, or if markets were judged to be very distressed.
For a household, the practical points are modest:
- Mortgage borrowers: check what is on offer well before a fixed deal ends. Rates for new fixed deals can depend on market pricing as well as on the Bank Rate decision.
- Savers: the Bank says that when it raises Bank Rate, banks “will usually increase” the interest they offer on savings, but that the rates banks set “depend on more than just the Bank Rate”.
- Everyone: inflation at 3.1% against a 2% target, with three MPC members preferring a rise on 17 September, is a reminder that the direction of rates is still debated.
What happened the last time the gilt market broke?
In late September 2022 the Bank said it would buy long-dated gilts on a temporary basis “to restore orderly market conditions”, with auctions running “from today until 14 October” and purchases that were “strictly time limited”. It was a time-limited operation aimed at the long-dated end of the gilt market.
The episode shows why the gilt market matters beyond finance professionals. It is where the Government’s borrowing costs are set and where many other rates take their cue. How investors read market volatility looks at that period alongside other recent UK shocks, and why markets often move before the data explains why yields can shift before any official announcement.
What to take from this
Gilt yields connect the Government’s borrowing, the Bank’s decisions and the rates people see on mortgage and savings products, but the link is indirect and varies by product and term. The Bank’s September plan makes its gilt unwind more gradual and predictable, which is its stated aim. It does not remove the importance of Bank Rate, which the Bank describes as its active policy tool. For readers, the useful habit is to look at the wider picture, including how Bank of England decisions ripple through the economy, not just the headline decision.
This article is general information, not personalised financial advice or a recommendation. Figures are as published by the sources below on the dates stated; rates and policy can change.
Sources: Bank of England - Interest rates and Bank Rate, decision published 17 September 2026; Bank of England - Inflation and the 2% target, updated 16 September 2026; Bank of England - Monetary Policy Summary and minutes, September 2026; Bank of England - Letter from the Governor to the Chancellor on the Asset Purchase Facility, 17 September 2026; UK Debt Management Office - About gilts; Bank of England - What are interest rates?; Bank of England - Staff Working Paper No. 1,031, August 2025; Bank of England - Gilt market operation announcement, 28 September 2022
