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The short answer
When the naira weakens, anything priced in dollars costs more naira to buy, so importers, manufacturers using foreign inputs and retailers raise prices to cover it. The effect on a shelf price depends on how much of its cost is imported: a 10% fall in the naira raises a fully imported item by about 10% but a product with 40% imported cost by about 4%.
What imported inflation is
Imported inflation is the part of rising prices that comes from abroad: dearer foreign goods, raw materials and fuel, or a weaker currency that makes the same foreign price cost more in naira. Nigeria imports finished goods, machinery, medicines and many inputs used by local factories, so movements in the exchange rate reach shop prices through several routes.
The chain from exchange rate to shelf
- The importer pays the foreign supplier in dollars (or another currency).
- The naira cost of that payment depends on the rate at the time of payment.
- Shipping, clearing, duties and haulage are added to reach the landed cost.
- The wholesaler and retailer add their margins, usually as a percentage of cost.
- The final price moves with the landed cost, often with a delay while old stock sells.
Because margins are percentages, a rise in naira cost is passed on in proportion, not just as a fixed naira amount.
Worked example (illustrative figures, not today's rate)
| Step | Before | After the naira weakens 10% |
|---|---|---|
| Item cost abroad | $50 | $50 |
| Example exchange rate | ₦1,500 to $1 | ₦1,650 to $1 |
| Naira cost | ₦75,000 | ₦82,500 |
| Plus 20% shipping, duty and clearing | ₦90,000 | ₦99,000 |
| Plus 25% retail margin | ₦112,500 | ₦123,750 |
The shelf price rises by ₦11,250, which is 10%, the same as the currency move. Now take a locally made loaf where imported wheat and packaging make up 40% of cost. A 10% currency move raises that 40% share by 10%, so total cost rises by about 4%.
Why pass-through is rarely immediate or complete
- Shops sell old stock bought at the earlier rate first.
- Competition can squeeze margins for a while.
- Some firms hedge or hold foreign currency.
- When customers are stretched, firms may cut pack sizes instead of raising prices.
The Stanbic IBTC Bank Nigeria PMI for January 2026 reported purchase prices rising sharply on higher raw material costs and output prices at a four-month high as firms passed costs on. Pass-through can also run the other way: a stronger naira lowers landed costs, though prices tend to fall more slowly than they rose.
Where to see it in the data
The rebased NBS CPI includes an imported food sub-index. As at October 2026, Voice of Nigeria reported it at 9.18% year-on-year in September 2026, against 19.59% for food overall. For pricing advice if you run a shop, see pricing imported goods when the naira moves.
Which items feel it first
- Fully imported goods such as phones, spare parts and many medicines: close to full pass-through, usually within weeks as new stock lands.
- Local products with imported inputs such as bread (wheat), noodles, drinks in imported packaging, and paint: partial pass-through in proportion to the imported share.
- Fuel and energy: a weaker naira raises the cost of crude-linked products, which then raises transport and generator costs across the economy.
- Mostly local items such as fresh produce and local services: smaller direct effect, but haulage and fuel costs still reach them.
This is why a currency fall can keep pushing prices up for months: the first round hits imports, the second reaches local goods through fuel, transport and wages.
Where Pryme fits
If you pay suppliers abroad, holding NGN, USD, GBP and EUR in one business account lets money stay in the currency it arrived in, and Swap shows the rate and fee before you approve a conversion.
Questions people ask
Why does a weak naira increase prices?
Imported goods and inputs are priced in foreign currency, so each dollar costs more naira and sellers pass the higher cost on.
What is exchange rate pass-through?
The share of a currency move that shows up in local prices. It is higher for fully imported goods and lower for local products with some imported inputs.
Will prices fall if the naira strengthens?
Landed costs fall, but shelf prices usually come down more slowly and not always fully.
Does the NBS measure imported inflation?
The rebased CPI includes an imported food sub-index, reported at 9.18% year-on-year in September 2026.
Sources
- Voice of Nigeria: Nigeria's headline inflation drops to 14.63 per cent (16 Oct 2026) · accessed Oct 2026
- S&P Global: Stanbic IBTC Bank Nigeria PMI news release, January 2026 (2 Feb 2026) · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.