Consumers use the sector to spread spending

1. Borrowing lets a household buy a house or a car now and pay over years, which almost nobody could do out of current income.
2. Saving does the reverse, moving spending power into the future, and it earns interest while it waits, as covered in 2.8.4.
3. Insurance protects a household against a loss it could never absorb, which is why a mortgage lender insists on it.
4. Deposit protection of £120,000 per person per firm is what makes all of this safe enough to use (Source: FSCS).

Producers need finance to invest and trade

1. Firms borrow to buy machinery and buildings, so the sector is what turns other people's savings into the investment described in 3.1.5.
2. Day-to-day trading also depends on it, because a firm paid in 60 days still has wages to pay this week.
3. Insurance lets firms take risks they would otherwise refuse, from shipping goods to employing people.
4. Small firms feel this most sharply, since a business that cannot get a loan cannot expand however profitable it is.

The government depends on the sector too

1. The government borrows through financial markets when it runs a deficit, which is how the budget positions in 3.5.2 are actually funded.
2. It taxes the sector heavily, and financial and related professional services produced about 11% of UK output in 2025, roughly £290 billion (Source: TheCityUK).
3. The sector is also a major employer and a large export earner, so its health affects the growth and employment objectives in 3.1.1 and 3.2.1.
4. That dependence cuts both ways, because a government relying on one sector for revenue is exposed when that sector struggles.

The sector carries risks as well as benefits

1. Because everything runs through it, a failure spreads: a bank that stops lending stops firms investing and households buying.
2. Rescuing it is expensive, and the cost lands on taxpayers rather than on the firms that took the risks.
3. Not everyone is served equally, since households with poor credit records pay far more to borrow or cannot borrow at all.

Reaching a judgement on the sector's importance

1. It depends on whose position you take, because a saver values protection and a return while a small firm values being able to borrow at all.
2. It depends on whether it is working, since the same interconnection that spreads credit in good times spreads failure in bad ones.
3. It depends on how well it is regulated, because the benefits depend on people trusting it and that trust rests on the rules.
4. It depends on who is left out, as the households and firms who cannot get credit gain least from a sector the rest of the economy relies on.
5. Overall: the financial sector is essential rather than merely useful, because saving, investment, payments and insurance all run through it and no modern economy functions without them, but its importance is exactly what makes its failure so costly, which is why it is among the most heavily regulated parts of the economy.