Nigeria September Inflation Seen at 15.5%: What to Know

Nigeria's headline inflation rate for September 2026 is forecast at about 15.5%, a small rise from 15.39% in August, according to a BusinessDay model estimate published ahead of the official National Bureau of Statistics (NBS) report expected on 15 October. A second forecast, from FMDA, puts it a little higher at about 15.65%. Both are estimates, not official figures. If they are right, September would end three straight months of easing. Here is what the forecasts say, why prices may have picked up, and what to watch when the NBS publishes.

Forecast versus official: the numbers so far

It helps to keep the two kinds of numbers apart. The June to August figures below are official NBS data. The September figures are forecasts.

BusinessDay's estimate is 0.11 percentage points above August. FMDA's would be a rise of about 0.26 points. Neither would undo most of the progress made since June, but either would show that the slowdown in price growth has paused.

Why a small monthly rise matters

Headline inflation is a year-on-year figure. It compares prices this month with prices in the same month last year. So whether it rises or falls depends partly on how fast prices rose this month compared with the same month a year ago. This is often called the base effect.

FMDA's numbers show how this works:

Because FMDA expects prices to rise by about 0.95% in September 2026, faster than the 0.72% recorded in September 2025, the yearly rate goes up. FMDA linked the faster monthly rise to higher petrol (PMS) and diesel prices, which push up transport and distribution costs. It said cheaper food and a firmer naira should limit the effect.

How the BusinessDay model works

BusinessDay said its forecast comes from an econometric model that uses monthly inflation, exchange rate and Purchasing Managers' Index (PMI) data. It described the result as an indication of direction, not a substitute for the NBS release.

The newspaper noted that its forecast errors have stayed below 0.06 percentage points so far, and that a confirmed rise would mean the model has called the direction correctly four times in a row. It also said the track record is still short, so it should be treated with care.

Oil above $100: a mixed signal

Brent crude traded around $106 per barrel on 13 October, on supply concerns linked to tensions in the Middle East, although prices eased during the session, BusinessDay reported.

For Nigeria, that cuts both ways:

• Good for dollar earnings. Higher oil prices can lift export revenue and foreign exchange inflows.
• Bad for costs at home. If higher crude prices feed into fuel, transport and distribution costs, they can add to inflation.

BusinessDay pointed out that neither effect is automatic. The final impact depends on domestic fuel prices, the exchange rate and business costs.

The CBN rate cut is not cheap money yet

The forecasts come after the CBN's Monetary Policy Committee met on 21 and 22 September and cut the Monetary Policy Rate (MPR) by 350 basis points, from 26.5% to 23%. Governor Olayemi Cardoso described the move as a strategic reset of the policy framework, not conventional easing. The aim, he said, was to bring the official benchmark closer to actual money market conditions.

Other settings were kept tight:

A lower MPR does not automatically mean cheaper loans. Lending rates also depend on banks' funding costs, liquidity, credit risk and inflation expectations. A rise in September inflation could make the CBN more cautious about any further cut.

What this means for investors

• Wait for the official number. The NBS report, expected on 15 October, is the figure that counts. Forecasts can miss.
• Watch real returns. If inflation is around 15.5% and your savings, fixed deposit or money market fund pays less than that after tax and charges, your money is losing buying power.
• Fixed income is sensitive to this data. Treasury bill and bond yields often react to inflation surprises. A higher-than-expected reading could push yields up; a lower one could do the opposite.
• Stocks feel it through costs and rates. Companies with high fuel and transport costs may face pressure on margins, while rate expectations affect how investors value shares.
• One month is not a trend. A single rise would not prove that disinflation is over. Look at the next two or three releases.

This is for information only and is not investment advice.

FAQ

What is Nigeria's inflation rate for September 2026?

The official NBS figure is expected on 15 October 2026. Forecasts before the release put it at about 15.5% (BusinessDay) and 15.65% (FMDA), up from 15.39% in August.

Why could inflation rise in September?

Forecasters point to higher petrol and diesel prices raising transport and distribution costs, and a faster monthly price rise than in September 2025.

Did the CBN rate cut to 23% cause inflation to rise?

There is no evidence of that in the forecasts. The CBN called the cut a reset of its framework and says its stance remains restrictive.

Sources

• BusinessDay, "BusinessDay sees September inflation rising to 15.5%" (14 Oct 2026)
• FMDA, "Nigeria Inflation Forecast – September 2026" (13 Oct 2026)
• TheCable, "IMF/World Bank meetings, NBS inflation report… business updates to track this week" (12 Oct 2026)