Hook£46 billion in eleven months — credit as the economy's oxygen supply
On 4 May 2020, with much of the economy shuttered by lockdown, the government launched the Bounce Back Loan Scheme: up to £50,000 per small firm (capped at 25% of turnover), at 2.5% interest, nothing to repay for the first year — and, the clause that made it move, a 100% state guarantee to the lending banks. On the first day alone, banks approved roughly 69,000 loans worth over £2 billion. By the scheme's close in March 2021, about 1.6 million businesses had borrowed some £46 billion.
That is what credit is for: bridging the gap between money going out and money coming in, so a fundamentally viable firm survives a shock that its cash flow alone could not. But the scheme showed credit's other face just as clearly. Because the taxpayer bore all the risk, banks had little incentive to check who they were lending to — and official estimates of losses to fraud ran into the billions, with one early government figure near £5 billion. Section 1.4 is both faces at once: banks move spending power from those who have it to those who can use it, and every pound of credit is a risk that someone, somewhere, must carry.
ModelWhat banks are for
A bank's core job is financial intermediation: standing between savers and borrowers so the two never need to find each other. It gathers millions of small deposits that can be withdrawn at any moment and turns them into fewer, larger, longer loans — a trick called maturity transformation (borrow short, lend long). It pools risk, so one defaulting borrower dents a portfolio rather than ruining one unlucky saver, and it runs the payments plumbing — salaries, direct debits, card transactions — that every other market in this theme depends on. Its margin is the spread: pay savers less than it charges borrowers.
Maturity transformation is enormously useful and inherently fragile, because if every depositor asks for their money on the same morning, no bank on earth has it to hand. In September 2007 Northern Rock, which had funded long mortgages with short-term wholesale borrowing, saw that funding freeze — and queues formed outside branches in the first run on a major British bank since 1866. It was nationalised in February 2008. That fragility is why banks are regulated and why deposits are insured (the FSCS covers £85,000 per person per bank). One extension worth knowing: the Bank of England's own 2014 explainer confirmed that when banks lend they create new deposits — credit can grow faster than saving, which is exactly why someone has to watch how fast it grows.
MechanismRisk and liability — the price of money is the price of risk
Lenders face one core risk: default. Everything about how credit is priced follows from it. A mortgage secured on a house cost roughly 4.5–5.5% in 2024, an unsecured personal loan more like 7–9%, a typical credit card upwards of 24% APR, and an arranged overdraft around 39.9% EAR at most big banks since the FCA's 2020 rules forced single headline rates. The pattern is not accidental: the more collateral (security) the lender can seize on default, and the more predictable the borrower, the cheaper the money. Unsecured, instant, walk-away credit is priced for the borrowers who never come back.
On the borrower's side, the law decides who loses what. A sole trader or ordinary partnership has unlimited liability: legally, the business's debts are the owner's debts, all the way to the house and savings. Shareholders in a limited company have limited liability — the most they can lose is what they put in. But watch the real world close the loophole: because banks know a small limited company can fail leaving them nothing, they routinely demand personal guarantees from its directors, quietly reinstating the unlimited liability the company structure was meant to remove. In an extract, a director who has signed one is exposed exactly like a sole trader — spotting that is an application mark.
DataThe credit menu — match the source to the job
The spec expects the menu and, more importantly, the matching logic. An overdraft is flexible, instant and repayable on demand — right for a few weeks of timing gap, ruinous as permanent finance. A bank loan delivers a fixed sum on a fixed schedule — built for machinery, vehicles, shop fit-outs, where the asset outlives the repayments. Trade credit — the standard 30 to 60 days a supplier gives you to pay — is interest-free finance and the lifeblood of business-to-business trade, but it makes small suppliers into unpaid banks for their customers: the Federation of Small Businesses has estimated that late payment contributes to the closure of tens of thousands of UK firms a year. Leasing and hire purchase put assets to work without buying them outright; mortgages are the long, secured, cheapest end of the spectrum.
Households use a parallel menu — credit cards, overdrafts, mortgages, car finance — plus the newest arrival, buy-now-pay-later (Klarna and its rivals), which grew huge outside regulation and is now being brought inside the FCA's perimeter. Every option is the same three questions in different clothes: how long do you need the money, what security can you offer, and what does that combination cost?
A bakery needs £10,000 to cover a three-month gap between paying for a refit and the Christmas trade arriving. Option one, arranged overdraft at 39.9% EAR: roughly £10,000 × 0.399 × 3/12 ≈ £1,000 in interest. Option two, a bank loan at 8%: £10,000 × 0.08 × 3/12 = £200 — but banks rarely write three-month loans, so the firm may carry the debt (and the interest) for years it does not need. Option three, negotiating 60 extra days of trade credit from its flour and packaging suppliers: £0, at the price of goodwill and the suppliers' own cash flow. The exam question 'which source should the firm use?' is always secretly 'match the LENGTH and PURPOSE of the need to the terms of the source' — say that sentence, then do the arithmetic.
CaseCredit in the whole economy — accelerator, and fault line
Zoom out and credit is what lets spending happen at a different time from earning. Mortgages let a thirty-year purchase happen at thirty: UK households owe around £1.8 trillion, the great bulk of it mortgage debt. Car finance rewired an entire industry — over 80% of new private cars are now bought on finance plans rather than saved-up cash. For firms, credit funds investment beyond what retained profit allows, which is how a good idea grows faster than its own earnings. Credit smooths consumption, pulls demand forward, and turns viable-but-illiquid plans into actual economic activity — the Bounce Back scheme was precisely this, done at national scale in a fortnight.
It is also the economy's main transmission cable. When Bank rate rose from 0.1% to 5.25% between December 2021 and August 2023, every variable-rate mortgage and business loan repriced; households' discretionary spending shrank, and firms felt it as falling demand — monetary policy works through credit. And when credit is granted carelessly, the cable becomes the fault line: lenders who do not bear their own risk lend badly, whether that is a state guarantee in 2020 or securitised mortgages in 2007. The full anatomy of that second story waits in 4.5 — but the principle belongs here: who carries the risk determines how carefully the credit is granted.
VocabularyKey terms the mark scheme pays for
TrapsMisconceptions that cost marks
ExamWhat examiners want
The classic 1.4 question hands you a firm with a financing need and asks which source of credit fits. The mark-winning move is to classify the need first — how long, how large, what security exists — then match it, with the overdraft-for-gaps, loan-for-assets, trade-credit-for-stock logic stated explicitly. Interest calculations follow the standard ritual: amount × rate × time, with the unit and a one-sentence interpretation, and the examiner's favourite twist is annual rates applied to part-years — always pro-rata.
For 8- and 12-markers on credit's wider impact, build the transmission chain in full: 'Bank rate rises → variable repayments rise → households' discretionary income falls → demand for the firm's product falls' — then evaluate by asking who is insulated: fixed-rate borrowers, firms financed by retained profit, exporters facing different conditions. And keep the risk-bearing principle as your evaluative spine — lending standards track who carries the loss, from Bounce Back fraud to Northern Rock — because it turns any credit question into an argument rather than a list.