Why savings rates do not always rise with central-bank rates

A central-bank rate increase can create a simple expectation: if the policy rate rises by 0.25 percentage points, savings rates should rise by the same amount.

In practice, the connection is much less direct.

Banks treat interest paid to savers as a cost. They will usually increase that cost only when they need to attract or retain deposits, respond to competition, or strengthen their liquidity position.

That means an easy-access savings account can remain unchanged even when overnight market rates move higher. Understanding why helps savers make better comparisons without assuming their provider will automatically pass on every rate rise.

The policy rate is not your savings rate

A central bank influences the price of very short-term money in the financial system. It does not normally tell commercial banks what rate they must pay savings customers.

Each bank makes its own pricing decision.

Federal Reserve research describes the proportion of a policy-rate move passed through to deposit costs as the bank's "deposit beta". This pass-through varies between institutions and across interest-rate cycles rather than following a fixed one-for-one formula. The Federal Reserve's research on policy rates and bank funding costs provides useful background on this relationship.

The same broad analytical principle is relevant to UK savers: a central-bank decision changes the environment in which providers operate, but it does not guarantee an identical or immediate change to a retail account.

How banks decide what to pay savers

A savings balance is funding for the bank. The bank therefore considers what that funding is worth relative to its other sources of money.

Several factors influence the rate offered.

1. How much funding the bank needs

A provider seeking more deposits may offer a competitive rate to attract cash. Another provider may already have sufficient funding and see little reason to pay existing customers more.

Loan demand also matters. If a bank has limited opportunities to lend additional money at attractive returns, gathering expensive new deposits may not be a priority.

2. How likely customers are to move

Some savers regularly compare rates and transfer money when a better offer appears. Others value convenience, familiar online banking, payments access or keeping several products with one provider.

Providers understand this behaviour. If customers are unlikely to leave over a small rate difference, the commercial pressure to increase rates is weaker.

Research from the Federal Reserve Bank of Kansas City discusses how convenience, safety and customer inertia can allow bank deposit rates to remain below yields available elsewhere.

3. The competitive market

Online and rate-focused providers may compete more aggressively because their customers tend to be more sensitive to returns. Large traditional banks may have more customers who prioritise branch access, current-account integration or familiarity.

The relevant comparison is therefore not simply your account against the policy rate. It is your account against genuinely accessible alternatives with similar risk and withdrawal terms.

4. Profit margins

Banks generally earn a spread between the return on assets such as loans and the cost of their funding.

If income from assets rises before the cost of deposits, that spread may improve. A bank therefore has a financial incentive not to raise savings rates more quickly than necessary.

This does not mean the bank is earning a particular percentage directly from each customer's balance. A bank's economics also include defaults, operating expenses, capital requirements, liquidity management and the cost of other funding.

Why rate cuts can appear to arrive faster

Savers often feel that providers respond quickly when rates fall but slowly when they rise.

There can be an economic reason for that apparent asymmetry. A lower policy rate may reduce the returns available on new loans and liquid assets. Cutting variable savings rates can then protect the bank's margin.

After a rate increase, however, a bank may wait to see whether competitors move first, whether customers withdraw funds and whether it genuinely needs additional deposits.

This is not a universal rule. Competition can sometimes force rapid increases, while product terms or commercial decisions may delay cuts. The important point is that the incentives on the way up and down are not necessarily identical.

Be precise about "money market" products

The term money market can describe products with materially different structures.

A money market deposit account is a bank deposit product. A money market fund is an investment fund holding short-term instruments. The two may offer similar-looking yields, but their protections, access arrangements and risks are not necessarily the same.

Before moving cash, establish:

• whether the product is a bank deposit or an investment fund
• which regulatory or deposit-protection arrangements apply
• whether the quoted return is variable
• how quickly money can be withdrawn
• whether there are transaction limits, fees or notice periods
• whether the value can fluctuate

Do not treat a slightly higher quoted yield as free extra return. It may come with different liquidity, protection or investment risk.

What savers should compare

The headline rate is only the starting point.

Compare annualised returns consistently

Use the standard annual percentage yield or equivalent annual rate disclosed for the product, rather than comparing a monthly rate with an annual figure. Check how often interest compounds and whether the displayed return assumes that interest remains in the account.

Read the eligibility conditions

An attractive rate may apply only to new customers, new money or balances within a particular tier. It may also be temporary.

Check what happens after any introductory period and whether the provider can change the rate at short notice.

Deduct fees

Monthly charges, transfer costs and minimum-balance conditions can reduce the effective return. This is especially important when the balance is modest or cash may need to be withdrawn regularly.

Match access to the purpose of the cash

Emergency money should normally be readily accessible. Cash that will not be needed for a defined period may be able to earn more in exchange for notice requirements or withdrawal penalties.

Chasing a higher rate is less useful if the product prevents the money from doing its intended job.

Check protection and concentration

Confirm what protection applies to the specific institution and product rather than relying on a brand name. Different brands may also be connected to the same banking group, which can matter when assessing how cash is distributed.

The wider lesson applies to company analysis too. Cash should be assessed alongside obligations, access and future funding requirements, not viewed as an isolated number. That principle is illustrated in this analysis of why a company's cash position can keep funding risk in focus.

A practical cash-review process

There is little need to react to every central-bank announcement. A more disciplined process is to review cash periodically or when there is a meaningful change in rates.

For each account, record:

1. The current annualised rate.
2. Whether the rate is variable or promotional.
3. Any balance limits and fees.
4. Withdrawal speed and restrictions.
5. The applicable protection or investment risk.
6. The best comparable alternative available on similar terms.

Then consider the benefit of switching in pounds, not just percentage points. A small rate improvement may be worthwhile on a large balance, but insignificant on a small one after accounting for administration and reduced convenience.

Focus on the whole cash proposition

A central-bank rate rise increases the opportunity cost of leaving money in a poorly paying account. It does not oblige every provider to increase savings rates immediately or equally.

The sensible response is neither blind loyalty nor constant account switching. It is to compare like with like, understand why the cash is being held and judge each product on its after-fee return, safety, liquidity and restrictions.

Your provider's reaction to one policy decision matters less than whether the account remains competitive for the job you need it to perform.