NBS Explains Planned Adjustment of December Inflation After CPI Rebasing
Edino Chubiyo Cornelius 
ABUJA, Nigeria – Nigeria’s National Bureau of Statistics (NBS) announces plans to adjust December 2025 inflation figures to correct distortions caused by technical base effects following the rebasing of the Consumer Price Index (CPI).
The Bureau disclosed this on Monday during a virtual stakeholders’ meeting organised with the Nigerian Economic Summit Group (NESG).
Statistician-General of the Federation, Adeyemi Adeniran, explains that the CPI was rebased in 2024, replacing the 2009 base year after 15 years. “Using December 2024 as a base created an artificial spike in year-on-year inflation for December 2025,” Adeniran says.
He stresses that the increase does not reflect real economic pressure but rather a statistical phenomenon common after rebasing exercises.
NESG Chief Executive Officer, Dr Tayo Aduloju, warns that misinterpreted inflation data could mislead policymakers as Nigeria transitions from economic stabilisation to consolidation.
Presenting technical details, NBS Director of Price Statistics, Dr Ayo Anthony, says the rebasing introduces over 400 new items and removes more than 200 from the CPI basket.
He adds that the Bureau will apply a normalisation process, using the average CPI for 2024 as the base, in line with global best practice. “The base effect will disappear from January 2026,” Anthony says.
The NBS reaffirms its commitment to transparency, accuracy and regular rebasing of economic indicators to strengthen confidence in official data.
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