What a central bank does, why it is independent of elected politicians, and why it stands behind the banking system when trust fails.
Who decides what your mortgage costs, and why is it not the government?
A central bank is the government's banker and the banker to commercial banks. It issues notes, sets the policy interest rate, supervises financial stability and acts as lender of last resort. Independence helps because it removes the political temptation to cut rates before elections.
A central bank is the official institution that manages a country's money and supports its banking system. In the UK this is the Bank of England (the Bank). In the euro area it is the European Central Bank (ECB).
Operational independence means the central bank chooses the interest rate without ministers instructing it. The Bank of England was granted operational independence in 1997, and its Monetary Policy Committee (MPC) was given a primary objective of meeting an inflation target set by the Chancellor.[3]
The UK has operational independence but not goal independence. The Treasury specifies the target under the Bank of England Act 1998.[6] So the Bank chooses the means, but elected ministers choose the aim.
The reason for independence is a credibility problem. Politicians gain votes from low interest rates before an election, but cheap borrowing pushes up inflation later. If firms and workers expect this, they build higher inflation into wage and price decisions. An independent bank removes that incentive, so inflation expectations stay anchored.
The MPC sets one rate for the whole economy. The transmission mechanism is the chain by which that rate changes spending and prices. It does not hit everyone at once or equally.
Several channels work together. Higher rates raise the reward for saving. They raise the cost of borrowing for firms, so investment falls. They usually lift the exchange rate, which lowers net exports. They also change expectations about future inflation.
Illustrative figures: a household has an interest-only mortgage of £200,000. If the mortgage rate rises from 4% to 5%, annual interest rises from £8,000 to £10,000. That is £2,000 less to spend each year, so consumption falls.
There are also time lags. Most of the effect on inflation takes many months to arrive. This is why the MPC sets policy against its forecast of inflation, not only against current inflation.
A bank lends long and borrows short. It holds depositors' money that can be withdrawn on demand, but lends it out for years. A solvent bank can therefore still run short of cash if many depositors panic at once. This is a bank run.
The lender of last resort (LOLR) lends to a bank that is solvent but illiquid, when no private lender will. The central bank usually demands good collateral and a penalty rate. Knowing the safety net exists makes runs less likely, so it is rarely used.
The cost is moral hazard. If banks expect rescue, they may take bigger risks, because the central bank bears part of the loss. Regulation and capital requirements exist to offset this.
Central banks have also stepped in beyond banks. In September 2022 the Bank bought long-dated government bonds to calm a disorderly market, which shows the safety-net idea applied to markets.[4]
The Bank has separate bodies for separate goals. The MPC targets inflation. The Financial Policy Committee (FPC) watches risks to the whole financial system.
Evaluation starts from the fact that the MPC faces trade-offs. In September 2026 it held Bank Rate at 3.75% by a 6–3 vote. Three members voted to raise Bank Rate to 4%.[1] The split shows that experts read the same data differently.
Do not say the government sets interest rates in the UK. Do not say a rate cut always raises growth, because lags and weak confidence can blunt it.
Do not confuse the central bank with commercial banks. Do not describe lender of last resort as a rescue of insolvent banks without discussing moral hazard.
The economics is the same on every board; the question format is what changes. Most questions on this topic take one of six shapes. Open each to see how the topic appears in it and what earns the marks. All questions here are original Curriculum Circle practice questions, not board questions.
On this topicCommon on this topic. Questions test the functions of a central bank, who sets Bank Rate and the meaning of lender of last resort.
What earns the marksAO1 for precise definitions, and AO2 when a short scenario is given.
CC practice questionWhich one of the following is a function of a central bank? A: setting the inflation target; B: acting as lender of last resort; C: lending to households for mortgages; D: setting income tax rates. (1 mark)
On this topicLess common. It may ask for a change in interest payments, a real interest rate or a percentage-point change in Bank Rate.
What earns the marksAO1 for the method, and AO2 for applying it with the right units.
CC practice questionIllustrative figures: Bank Rate rises from 3.5% to 4.25% and a mortgage of £150,000 is interest-only and moves by the same amount. Calculate the rise in annual interest. (3 marks)
On this topicCommon. Typical prompts ask why independence matters or what lender of last resort means.
What earns the marksAO1 for the idea, AO2 for context and AO3 for a short chain of reasoning.
CC practice questionExplain why granting a central bank operational independence may reduce inflation expectations. (6 marks)
On this topicCommon. A data extract on Bank Rate and inflation is often paired with an AD and AS diagram.
What earns the marksAO2 for using the data, and AO3 for a chain from rate to prices.
CC practice questionAnalyse, using an AD and AS diagram, how a rise in Bank Rate might affect the price level and output. (9 marks)
On this topicThe usual way this topic is examined: assess a policy. The extract might describe a rate decision or a rescue, and ask for a judgement.
What earns the marksAO3 for analysis and AO4 for weighing lags, expectations and the source of inflation.
CC practice questionEvaluate the view that the Bank of England should raise Bank Rate when inflation is driven by higher energy prices. (12 marks)
On this topicAppears as independence, the effectiveness of interest rates or the case for a safety net. It is often combined with monetary policy.
What earns the marksAO1 to AO3 for a developed argument, and AO4 for a supported final judgement.
CC practice questionTo what extent should a central bank be independent of the government? (25 marks)
| Weight | What it is | What it means on central banks | |
|---|---|---|---|
| AO1 | 20–23% | Knowledge and understanding of terms, concepts, theories and models | Know the functions of a central bank, define Bank Rate, independence and lender of last resort, and state the inflation target correctly. |
| AO2 | 26–29% | Application to economic contexts | Use the context given: the MPC vote, the inflation figure or the type of mortgage a household holds. Name the real institution, such as the Bank of England. |
| AO3 | 26–29% | Analysis of issues and their impact on economic agents | Build the chain from Bank Rate to market rates, spending, AD and prices. Explain why independence lowers expected inflation. |
| AO4 | 22–25% | Evaluation, using evidence to reach a judgement | Weigh lags, cost-push inflation, expectations, household debt and accountability. End with a judgement on what the outcome depends on. |
Weightings are approximate and taken from the AQA A-level Economics 7136 specification [0]. Edexcel and IAL weight the objectives differently, but they test the same four skills.
Assess whether an independent central bank is better placed than elected ministers to control inflation.
Ministers face elections, so they gain from low interest rates before voting day. Low rates raise borrowing and AD, so output rises in the short run but inflation follows later. If firms and workers expect this, they raise wages and prices in advance, so inflation becomes higher without any gain in output.
An independent central bank has a fixed target and no election to win. Because its commitment is credible, expectations of inflation stay near 2%. So wage bargains and price-setting stay moderate, and a smaller rate rise is needed to keep inflation in check.
The case is strong but depends on the cause of inflation. In 2026 the Bank was weighing a cost-push shock from energy prices. A rate rise cannot cut energy prices, so it lowers inflation only by lowering demand and output. Independence gives credibility, but does not remove this trade-off.
Accountability also matters. The UK keeps goal control with the Treasury, so ministers still set the target. On balance, independence is better for controlling inflation because it stops political timing, provided the target is credible and ministers support it. Its value falls if supply shocks are large and long.
On 17 September 2026 the Bank of England's MPC voted 6–3 to hold Bank Rate at 3.75%. Three members preferred a rise to 4%.[1]
UK CPI inflation was 3.5% in September 2026, above the 2% target, and the Bank expected it to reach slightly above 4% in the first quarter of 2027. Bank Rate had been cut by 1.5 percentage points between August 2024 and December 2025.[2]
On 28 September 2022 the Bank of England announced temporary purchases of long-dated government bonds to restore orderly market conditions.[4] It bought a total of £19.3 billion of gilts and ended the programme on 14 October 2022.[5]
Everything above is the topic page. The pieces below take it further. Each one trains a particular assessment objective rather than covering the topic again, and they are added over the year.
Figures and facts were checked against these sources on 2 November 2026. Worked numbers labelled "Illustrative figures" are invented for teaching.
The CC Economics revision platform drills central banks with timed questions marked by the Criterion Marking Engine, and the Inner Academy covers the topic in recorded lessons.
See the Economics platformThe Inner Academy