The pound’s exchange rate is not decided by any government or central bank. It is the price that emerges from buying and selling in currency markets, and understanding what feeds into it helps make sense of headlines about sterling “strengthening” or “weakening”. This article explains who sets the rate, which forces move it, how it is measured as a single figure, and how it reaches households and businesses.
Who actually sets the value of the pound?
Nobody sets it directly. The Bank of England states plainly: “We do not set the exchange rate. But our actions can indirectly affect the value of the pound.” In its explainer on the subject, the Bank says the exchange rate for the pound is decided by supply and demand, and that foreign currency trades worth over £1 trillion take place in the UK each day.
That has a practical meaning. When more people or institutions want to buy pounds than sell them, the price of the pound in other currencies tends to rise. When more want to sell, it tends to fall. The Bank’s own published daily rates carry a caveat that is worth remembering: according to its exchange-rate statistics page, they are not official rates and have no more authority than those of any commercial bank in London’s foreign exchange market.
What creates demand for pounds?
Anyone who needs pounds creates demand: an overseas investor buying UK assets, an importer in another country paying a UK supplier, a tourist converting money for a trip to London. Anyone selling pounds to buy other currencies adds to supply, such as a UK investor buying overseas shares or a UK retailer paying a foreign manufacturer.
The Bank’s explainer says many factors affect demand for pounds, and highlights two that the Bank can influence indirectly:
- Interest rates. In the Bank’s words, “Typically, if Bank Rate goes up, so does the strength of the pound.” Higher UK interest rates can attract investors looking for better returns, who need pounds to do so.
- Perceived economic stability. The Bank says: “If the UK economy is viewed as safe and sound then more people will want to invest in the UK, which will also lead to a stronger pound.”
The word “typically” matters. Interest rates are only one influence, and what counts is often the comparison with rates elsewhere and with what investors had already expected. Markets frequently move on anticipation, a theme explored in why markets often move before the data.
Why does the Bank Rate connection run both ways?
The Bank’s central job, according to the explainer, is to limit price rises, and it uses Bank Rate to do that. As of 17 September 2026, the Bank’s website shows Bank Rate at 3.75%, with the next decision due on 5 November 2026.
The link between rates and the currency creates a loop. A change in Bank Rate can shift the pound, and the pound in turn affects the prices of imported goods, which feed into inflation. This is one of the many channels by which a rate decision spreads, covered more broadly in why Bank of England rate decisions ripple through the economy. Readers who want a reminder of what the inflation figures capture can turn to what inflation figures really tell us.
Is there one “pound rate”, or many?
There are many. A bilateral rate compares sterling with a single currency, such as the dollar or the euro. These are the figures most often quoted. But the pound can rise against one currency while falling against another, so a single pair can give a misleading picture of sterling overall.
To get around this, the Bank publishes a sterling exchange rate index. It describes the index as “a measure of the overall change in the trade-weighted exchange value of sterling”. The index weights bilateral rates by trade flows in manufactured goods and services, so currencies of bigger trading partners count for more. Three details from the Bank’s page help explain how it works:
- The January 2005 average index value is set equal to 100.
- The weights are updated each year using new world trade data. The latest update was announced on 13 February 2026 and took effect on 11 March 2026.
- A narrow version includes countries whose share of UK imports or exports averages over 1% across the latest three years, and a broader version uses a 0.5% threshold. Euro-area countries are included in both.
For the narrow index, the Bank’s page lists 2024 weights of 22.0% for the United States, 40.2% for the euro area as a whole and 10.2% for China. It lists Germany at 8.8%, Ireland at 4.7% and the Netherlands at 4.6%. The euro area is the largest group in the index, which is one reason movements against the euro can matter more for UK trade than movements against the dollar, even though the dollar is quoted more often.
The Bank also notes elsewhere that, in general, an effective exchange rate “is often interpreted as a short term proxy measure for competitiveness”. There is no official international standard for how to build one, so different publishers’ indices can differ.
What does a stronger pound do to prices?
The Bank’s explainer sets out both sides. For those who buy more from abroad than they sell abroad, a stronger pound helps: “the stronger the pound, the cheaper it is to buy things abroad.” Overseas food and other imported goods become cheaper in the UK, and firms that buy from abroad pay less for their imports.
For exporters, the picture reverses. The explainer says: “A stronger pound means these goods are more expensive for foreigners to buy,” which can reduce sales for UK exporters. In short, people and firms who buy more abroad than they sell abroad generally prefer a strong pound, while those who sell more abroad than they buy generally prefer a weak one.
A worked example for a traveller
The arithmetic below is illustrative, using made-up rates rather than market data. Suppose a holiday will cost $650 in local spending.
| Exchange rate (dollars per £1) | Cost in pounds |
|---|---|
| $1.20 | £541.67 |
| $1.30 | £500.00 |
| $1.40 | £464.29 |
Each figure is $650 divided by the rate. Between $1.20 and $1.40, the same holiday changes by about £77 in pounds, even though nothing about the trip changed. The pound’s strength is the whole difference.
A worked example for an exporter
Now take a UK firm selling a product for £80 to a customer paying in dollars. Again the rates are invented for illustration.
| Exchange rate (dollars per £1) | Dollar price to the buyer |
|---|---|
| $1.25 | $100.00 |
| $1.35 | $108.00 |
If the firm keeps its sterling price at £80, a pound rising from $1.25 to $1.35 lifts the price paid by the overseas customer by $8, or 8%. The firm then has a choice between accepting that the product looks dearer abroad or cutting its sterling price and earning less per sale. Which it does depends on its costs, competitors and contracts.
Why do global events move sterling?
Because the pound is one side of every trade involving it, events that change how investors feel about risk can shift it quickly even when UK conditions have not changed. Developments overseas can alter demand for other currencies and so change the rate at which pounds trade against them. Why global events move UK markets looks at how that transmission works across asset classes.
For readers, the useful discipline is to separate the cause from the headline. A move of a cent or two in a day is a normal outcome of constant trading and says little by itself. What tends to matter for household budgets and company accounts is whether a move persists and is large relative to what was planned for.
What can households and firms realistically do with this knowledge?
The Bank does not suggest anyone should try to predict the pound, and nor does this article. Currency moves are driven by many factors at once. The lessons are more modest:
- Treat any single exchange-rate quote as one reading, and remember that a bilateral rate does not describe sterling as a whole.
- When budgeting for foreign spending, think in ranges rather than a single rate, as the traveller table shows.
- Businesses with costs in one currency and sales in another should note that their exposure is not simply “strong pound good, weak pound bad”. It depends on which side of the trade they sit.
What to take from this
The pound is priced by the market, not set by an authority, and the Bank of England influences it only indirectly, mainly through Bank Rate and its role in keeping the economy stable. A stronger pound makes imports and foreign travel cheaper and makes UK exports dearer abroad, with the reverse for a weaker pound. Because no single currency pair captures the whole picture, trade-weighted measures such as the Bank’s sterling index give a fuller view, with the euro area carrying the largest weight.
This article is general information, not personalised financial advice or a recommendation. Rules, rates and published figures change.
Sources: Bank of England
