· 5 min read
CPIx vs GfK Consumer Confidence: two ways to read the UK consumer
CPIx and GfK measure different things and frequently disagree. Understanding when and why they diverge is more useful than relying on either alone. Here is how to read both.
Two of the most closely watched UK consumer measures, CPIx and the GfK Consumer Confidence Barometer, regularly point in different directions. That divergence is not a data problem. It is the most informative thing either measure produces, because the two are capturing genuinely different things about the same households.
What GfK measures
The GfK Consumer Confidence Barometer has been running since 1974. Each month, a sample of around 2,000 UK adults is asked five questions covering their personal financial situation over the past year, their expectations for the next 12 months, the general economic outlook, whether now is a good time to make major purchases, and their personal savings intentions. Responses are aggregated into an index that runs from minus 100 (maximum pessimism) to plus 100 (maximum optimism).
GfK is a sentiment measure. It tells you how people feel about their finances and the economy. That is valuable information, but it is not the same as knowing how financially stretched they are. Sentiment can remain stable or even recover while balance sheets quietly deteriorate. The two have decoupled significantly in recent years, with households reporting cautious confidence while credit and repayment data tell a harder story underneath.
What CPIx measures
CPIx is the Briefed consumer stress index for the UK and US, updated in near-real time from published data series. Rather than asking how people feel, it measures what they are doing: how fast consumer credit is growing, whether delinquency and arrears rates are rising, how real wages are moving relative to prices, what is happening to discretionary retail demand, how household savings rates are changing, and what energy costs are doing to available income.
The result is a 0 to 100 index of financial pressure, not sentiment. A rising CPIx means households are under more financial stress, regardless of how they report feeling about it. The index is designed to lead the sentiment surveys rather than confirm them, because behavioural signals in credit and spending data tend to move before confidence does.
When they agree and when they diverge
In periods of acute economic shock, GfK and CPIx tend to move together. When unemployment spikes or inflation surges, sentiment and financial position both deteriorate quickly and the measures track each other. The more useful signal is in periods of apparent calm, when GfK is stable or recovering but CPIx is rising.
That configuration has been the more common one since 2022. Confidence measures have partially recovered from their 2022 lows as headline inflation has fallen. But the underlying financial stress, visible in credit growth, arrears data, and the gap between wage growth and real purchasing power, has not recovered at the same pace. When the two measures diverge in this way, CPIx is flagging that household balance sheets are under more pressure than sentiment surveys suggest, which has historically been a leading indicator of spending turning down.
Which to use and when
GfK is most useful for understanding consumer psychology and purchase intent. If you are trying to understand whether households are likely to make major discretionary purchases, take on new credit voluntarily, or feel confident enough to change jobs, GfK is capturing the relevant signal. It is also the benchmark figure that most financial media covers, which means it shapes market expectations independently of what it measures.
CPIx is more useful for understanding whether financial conditions are tightening before they show up in spending or sentiment data. For businesses with exposure to consumer demand, retailers, consumer-facing lenders, landlords, and strategy teams modelling household resilience, CPIx provides an earlier read on stress than the monthly survey cycle allows.
The most reliable approach is to use both, and to pay particular attention when they disagree. A rising CPIx against a stable or recovering GfK is a configuration worth taking seriously. The live UK and US readings are at briefedmedia.com/cpix. The daily briefing covers each major consumer data release in context. Free, weekdays at 06:45.