Interest rates
Why a rate decision takes time to reach your household
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Prices & households · Explainer
Falling inflation does not mean a cheaper weekly shop
How to separate the speed of price increases from the level of prices you actually pay.
The short version
- Lower positive inflation means prices are rising more slowly, rather than falling.
- CPI and CPIH cover different costs, so their figures need not match.
- A national price index cannot mirror every household’s shopping basket.
The rate and the level are different
Inflation headlines describe how prices change. Household budgets depend on the level those prices have reached. Confusing the two can make an apparently encouraging release feel detached from the supermarket checkout. A lower inflation rate can reduce the pace of additional pressure without reversing previous increases.
Imagine a hypothetical basket costing £100. It rises to £110 after a year, an increase of 10%. The following year it costs £112.20, an increase of 2%. Inflation has slowed sharply, yet the basket remains more expensive than it was at either earlier point. These are illustrative numbers, not a statement about current UK prices.
What the main indices cover
The Consumer Prices Index, or CPI, combines price movements across goods and services into an overall measure. Items are weighted to reflect spending patterns, so a category that absorbs more expenditure has greater influence than a rarely purchased item. The annual rate usually compares the index with the same month a year earlier.
CPIH adds owner-occupier housing costs and Council Tax to the coverage of CPI. The distinction matters when comparing headlines. Neither index is a receipt for an actual individual household, and neither should be read as the price change for every product. A falling overall rate can coexist with increases in some categories and reductions in others.
Why your experience can differ
Households spend differently. Someone with a long car commute may notice fuel changes more than a person who walks to work. A family buying more food and a household spending more on leisure can experience different pressures even in the same town. Timing also matters: a bill renewed once a year feels different from groceries bought every week.
Frequently purchased items are especially visible. You may remember the price of milk more readily than the cost of an appliance bought several years ago. That does not make your experience wrong. It means a broad statistical index and your own spending record answer different questions.
A more useful way to read price news
Look for the comparison period, the index being used and the categories driving the change. Keep a distinction between prices falling, prices rising less quickly and a monthly movement. Annual rates can change because of what happened a year earlier as well as what happened in the latest month.
For a practical household comparison, review regular bills and a consistent set of purchases over time. Allow for changes in quantities and quality: spending more because you bought more is different from paying more for the same items. Inflation is a helpful guide to the general direction of prices, but a personal budget still needs its own figures.
Common questions
What does negative inflation mean?
A negative rate means the measured price index is lower than in the comparison period. It does not mean every individual price has fallen.
Does CPIH include the purchase price of a house?
No. It includes a measure of owner-occupier housing costs; purchasing a house is treated as an investment rather than ordinary consumption.
Sources & further reading
These links provide definitions and background. Check the latest official release before using any current figure. Numerical examples in this article are illustrative.
Published 9 October 2026. General information, not personal financial advice. Spotted an error? Read our corrections process.
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