Nigerian Inflation: What the Numbers Measure and What They Miss

In short

Nigeria's inflation rate is published monthly by the National Bureau of Statistics as the Consumer Price Index. It is a real measurement built on a real basket, and it is almost always a worse description of your own experience than you expect, for reasons that are structural rather than suspicious.

Three things explain most of the gap between the headline rate and what people feel. The index measures an average basket across the whole country, and nobody buys the average basket. Food inflation and core inflation move differently, and a household spending most of its money on food lives inside the food number rather than the headline. And the rate is a rate of change, so a falling inflation rate means prices are still rising, just more slowly, which is one of the most consistently misread statistics in public discussion.

The NBS also rebased the index in January 2025, updating the basket and the base year. That changed the published figures without changing anything in any market, which is worth knowing before comparing a 2026 number to a 2023 one.

What the index cannot do is tell you what households changed. That is the part nobody publishes, and it is the part that matters most.

How the Nigerian CPI is actually built

The Consumer Price Index tracks the price of a fixed basket of goods and services over time. Field staff collect prices for the items in that basket, across markets and locations, and the weighted aggregate is compared to the same basket in an earlier period.

Several sub-indices are published alongside the headline, and they are more useful than the headline for most questions.

Food inflation covers food and non-alcoholic beverages. In an economy where food is the largest line in most household budgets, this is closer to lived experience than the all-items figure.

Core inflation strips out the volatile items, typically food and energy, to show the underlying trend. It is the number monetary policy pays most attention to, and the least relevant to a household buying food this week.

Urban and rural indices are published separately, and they diverge. Price formation is different when you are near production versus at the end of a long haul.

State-level indices exist too, and the spread across states is wide enough that a national figure describes no particular place well.

Year-on-year versus the twelve-month moving average. These are two different published figures and they get quoted interchangeably. The year-on-year rate compares this month to the same month last year. The moving average smooths twelve months of those comparisons and therefore lags. A headline can be falling on one measure while rising on the other, and both statements will be true.

The rebasing, and why old comparisons break

In January 2025 the NBS rebased the CPI, updating the basket to reflect current consumption patterns and shifting the base year.

Rebasing is routine statistical practice and overdue when a basket has aged, because consumption changes. But it has a consequence people find confusing: the published inflation rate changed significantly when the new series began, without any price changing anywhere.

The practical rule is that figures from before and after a rebasing are not directly comparable, and anyone presenting a long trend line across the break should say how they handled it. Many do not.

Why the headline never matches your experience

This is the question underneath most arguments about whether the official numbers are credible, and the answer is mostly arithmetic.

You do not buy the average basket. The index is weighted to the consumption pattern of the population as a whole. A household spending two thirds of its income on food has a personal inflation rate much closer to the food number than to the headline. A household with a long daily commute has one closer to transport.

Your own weights shift as prices move. As one item gets expensive you buy less of it and more of something else, so your real exposure changes continuously while the index basket is fixed between revisions.

You remember the increases. People notice the items that rose sharply and recall them accurately, and they do not notice items that were flat. Perceived inflation runs above measured inflation almost everywhere this has been studied, and it is a feature of memory rather than of the statistics.

Quantity changes feel like price stability. When a pack shrinks and the price holds, the shelf looks unchanged. Statistical agencies attempt to adjust for this, and it is genuinely hard to capture completely, so some of the gap between felt and measured inflation is real rather than perceptual.

Rent and school fees arrive in steps. A household's two largest annual commitments often reset once a year, by a large amount, and that lands as a shock rather than as the smooth monthly series the index describes.

Falling inflation is not falling prices

The single most common misreading.

If the inflation rate drops from one figure to a lower one, prices are still going up. They are going up more slowly than they were. A price level only falls when the rate goes negative, which is deflation, and that is rare and usually unwelcome for other reasons.

So a government announcing that inflation has fallen and a household insisting nothing is cheaper are both describing the same reality correctly. The prices that rose last year did not come back down; they just stopped rising as fast.

What inflation statistics cannot tell you

Everything above describes prices. None of it describes behaviour, and behaviour is where the consequences live.

No published Nigerian dataset tells you:

• what a household stopped buying, and in what order it gave things up
• whether protein frequency fell, and by how much, in which states
• how many households moved to buying on credit from a trader, and how that debt is running
• what happened to school attendance when fees reset against a squeezed budget
• which households added an earner, and what work that earner found
• how many drew down savings or sold an asset, which is the step that converts a temporary squeeze into a lasting loss
• what share of households have run out of adjustments to make

The last one is the measure that matters most and the one nobody holds. A household substituting cheaper food and a household that has already substituted, reduced, borrowed and sold are in completely different positions, and the price index records them identically.

These are survey questions with short recall windows and defined bases. They are not difficult to ask. They are simply not being asked at scale, which is why commentary on the cost of living in Nigeria runs almost entirely on the price side with the household side supplied by anecdote.

Reading an inflation claim properly

Six checks.

Which index? Headline, food, core, urban, rural, or a specific state. They are different numbers and the difference between the highest and lowest published figure in a given month is large enough to support almost any narrative.

Year-on-year or moving average? Say which, because they can point different ways.

Before or after the January 2025 rebasing? If a trend spans it, how was the break handled?

Nominal or real? A wage rising in naira while prices rise faster is a wage falling in real terms. Any claim about living standards that does not adjust is not about living standards.

Is the dollar conversion doing the work? Converting naira figures at a spot rate produces swings driven by the exchange rate rather than by any domestic price. Useful for comparing countries, misleading as a measure of what changed for a household.

If household behaviour is claimed, where is the sample? "Most Nigerians have cut back on X" requires a sample size, a geography, a date and a question wording. Without those four it is an assertion with a percentage attached.

What a proper household measure looks like

If the aim is to describe how households are coping rather than how prices are moving, the instrument needs four components and a cadence.

1. Total household income from every source. Multiple earners and informal income are normal, so a single-wage question measures the wrong thing.
2. Expenditure by category over a short recall window. Seven days for food and transport, a month for utilities, a year for fees and rent. Longer windows measure memory.
3. An adjustment inventory. Not "are you struggling", which everyone answers the same way, but a specific list: did you change brand, reduce portion size, reduce frequency, change where you buy, buy on credit, add an earner, use savings, borrow, sell something, stop buying this category entirely. Each one dated.
4. A reserve question. What remains that the household could still do. This is what separates strain from exhaustion, and it is the leading indicator everything else lags.

Then the same instrument again, on a fixed cadence, with the same base sizes, so a change can be distinguished from sampling noise. One wave is a snapshot. Four waves is a signal.

Where NigeriaPolls reports on this, the questionnaire and the base sizes are published alongside the findings, so a reader can judge the number rather than accept it.

Related reading

• The minimum wage in Nigeria and what it buys
• Fuel prices in Nigeria
• What Nigerians actually earn
• Our household research capability
• Our disclosure standards

Frequently asked questions

Who publishes Nigeria's inflation rate?

The National Bureau of Statistics publishes the Consumer Price Index monthly, including the headline all-items rate, separate food and core inflation measures, urban and rural indices, and state-level figures. The Central Bank of Nigeria uses these figures in setting monetary policy and publishes its own monetary and exchange-rate data alongside them.

What is the difference between headline, food and core inflation?

Headline inflation covers the full basket of goods and services. Food inflation covers food and non-alcoholic beverages only, and is closer to lived experience for households that spend most of their income on food. Core inflation removes volatile items, typically food and energy, to show the underlying trend, which makes it the most relevant measure for monetary policy and the least relevant for a household buying food this week.

Why does official inflation feel lower than what I experience?

Mostly arithmetic rather than anything suspicious. The index is weighted to the consumption pattern of the whole population, and no individual buys that average basket, so a household spending heavily on food lives inside the food figure rather than the headline. Your own spending weights also shift continuously as you substitute away from expensive items, while the index basket is fixed between revisions. On top of that, people recall sharp increases accurately and do not notice items that stayed flat, which pushes perceived inflation above measured inflation almost everywhere this has been studied.

If inflation is falling, why are prices still going up?

Because the inflation rate measures the speed of price increases, not the price level. A falling rate means prices are still rising, just more slowly than before. Prices only fall when the rate goes negative, which is deflation and is rare. A government reporting that inflation has fallen and a household reporting that nothing is cheaper are both describing the same situation accurately.

Why did Nigeria's inflation figures change in 2025?

The National Bureau of Statistics rebased the Consumer Price Index in January 2025, updating the basket of goods to reflect current consumption and shifting the base year. Rebasing is routine statistical practice and necessary when a basket has aged, but it changes the published rate without any price changing in any market. Figures from before and after the rebasing are not directly comparable, and anyone showing a trend across the break should state how they handled it.

What is the difference between year-on-year inflation and the twelve-month moving average?

Year-on-year compares the current month with the same month a year earlier. The twelve-month moving average smooths the last twelve of those comparisons, so it lags and is less volatile. Both are published, they are frequently quoted interchangeably, and they can point in different directions at the same time, so any claim about inflation rising or falling should say which measure it is using.

What does inflation data not tell you about Nigerian households?

Anything about behaviour. The index records what prices did, not what households changed. No published dataset says what families stopped buying and in what order, whether protein frequency fell, how many moved onto trader credit, what happened to school attendance when fees reset, how many drew down savings or sold an asset, or, most importantly, what share of households have run out of adjustments left to make. Those are survey questions, and they are not being asked at scale.

How should household coping with inflation be measured?

With a repeated survey covering four things: total household income from all sources rather than a single wage, expenditure by category over short recall windows, a specific dated inventory of adjustments made such as changing brand, reducing frequency, buying on credit, adding an earner, drawing on savings or dropping a category entirely, and a question about what the household could still do if pressure continued. That last measure separates strain from exhaustion. Running the same instrument on a fixed cadence is what turns a snapshot into a signal.