Inflation Explained: What Rising Prices Mean for Your Money

What inflation is

Inflation is a sustained rise in the general level of prices (ONS educational framing). When prices rise across many everyday things, cash buys less than it did before.

Your household may feel it differently from the average. Groceries, energy, transport and services can move at different speeds — your personal “inflation” can sit above or below the official rate.

Deflation (prices falling overall) exists too, but it is rarer in recent UK conversation. One calm line is enough: falling prices are not the same story as rising ones.

Inflation is also not the same as a one-off jump in the price of a single item. Official measures look across a basket.

CPI and CPIH

The shopping-basket idea

The Office for National Statistics (ONS) tracks prices in a representative basket of goods and services and compares them with the same month a year earlier to produce an annual rate.

CPI vs CPIH

Other measures (such as RPI or Household Costs Indices) exist. This guide stays with CPI and CPIH.

Any live percentage you see in the news should be dated — for example “ONS, 12 months to” followed by the month and year. Never treat a remembered figure as permanent.

Expert note — CPI vs CPIH

Real vs nominal returns

Nominal is the number on your statement or the advertised AER before you think about prices.

Real is roughly what that return is worth after inflation — your purchasing power.

A simple teaching formula (use illustrative percentages only, or dated official figures clearly labelled):

real ≈ (1 + nominal) ÷ (1 + inflation) − 1

Cash can show a higher balance while buying less if inflation outpaces interest.

For what AER means on savings ads, see AER explained. FSCS protects eligible deposits if an authorised firm fails — it does not protect your money’s buying power from inflation.

Why savers care: inflation vs AER + interest rates

Inflation vs AER

Compare a dated CPI or CPIH rate with your account’s AER as a rough sense-check — not a perfect personal forecast.

Variable savings rates and inflation both move. An AER that felt comfortable last year may not keep pace with prices this year.

Access rules, tax (Personal Savings Allowance / ISAs) and bonuses still matter. Light context: ISA allowance rules and Savings.

Inflation vs interest rates

Bank Rate is set by the Bank of England’s Monetary Policy Committee and influences many mortgage and savings rates. It is not the same thing as CPI.

When inflation sits above the Bank’s target, policy rates may be higher to help cool price growth (high-level, non-political).

Bank Rate can change after Monetary Policy Committee meetings, so any figure you see online should be checked against the Bank of England website and dated to the relevant decision — it is not a permanent “always true” number.

Worked illustrative example

Sketch 1 — balance up, buying power down

• You start with £1,000 in a savings pot.
• Over a year it earns an illustrative AER of 3%, so the balance rises to about £1,030.
• Over the same period, an illustrative inflation rate of 5% means a simple basket that cost £1,000 now costs about £1,050.

Your statement looks better. Your purchasing power against that basket is still behind.

Sketch 2 — positive real return (still illustrative)

• Same £1,000 and 3% AER → about £1,030.
• Illustrative inflation of 2% → the basket costs about £1,020.

Here the nominal balance grew a little faster than the illustrative price rise. No brand names.

No “open this account”. These percentages are teaching tools only.

The catch

When to check ONS, the Bank of England and MoneyHelper

• ONS Consumer price inflation bulletin for the latest CPI / CPIH (monthly)
• Bank of England for the inflation target and Bank Rate decisions
• MoneyHelper for budgeting and savings explainers in plain English

This page is general information. Big money decisions may need regulated advice. If rising costs are squeezing essentials, MoneyHelper can also signpost free budget and debt help.

Summary / key takeaways

• Inflation means rising prices and falling purchasing power of cash.
• CPI and CPIH are the main UK consumer price measures.
• Real vs nominal matters for savers; compare carefully with AER.
• Bank Rate is not the same as CPI.
• Use dated official figures; illustrations in this guide are teaching tools only.
• Check ONS, the Bank of England and MoneyHelper; this is not personalised advice.
• More guides: Money Tips & Guides, Savings, AER explained, ISA allowance rules.

Related reading

FAQ

Is CPI or CPIH “the” inflation rate?

Both are official. CPI is used for the Bank of England’s 2% target. CPIH is ONS’s more comprehensive consumer measure. Always check which one a news story quotes.

Does a higher AER always beat inflation?

Not necessarily. Compare a dated inflation figure with your AER, and remember tax, access and bonuses. See AER explained.

Does FSCS protect me from inflation?

No. FSCS is about eligible deposits if a firm fails. It does not stop prices rising.

Why does my shop feel worse than the official rate?

Your basket may weight food, energy or rent differently from the national average. Official rates are averages.

Should I invest to beat inflation?

This guide does not give investment advice. Investments can fall as well as rise. For personal decisions, check official guidance or speak to a suitably qualified professional.

Where do I find the latest UK inflation figure?

The ONS Consumer price inflation bulletin — look for the month and the measure (CPI or CPIH).

Disclaimer