How to Protect Your Money from Naira Inflation: Fixed Deposit, T-Bills & Dollar Alternatives

Every month, the National Bureau of Statistics (NBS) publishes the Consumer Price Index, and every month the same quiet arithmetic plays out in millions of Nigerian bank accounts. If your savings earn 10% a year while prices rise faster than that, you are losing money. Not in nominal terms, the balance on your banking app still grows, but in what that balance can actually buy: garri, fuel, school fees, rent.

This is the single most misunderstood fact in Nigerian personal finance. A fixed deposit paying less than the inflation rate is not a safe investment. It is a guaranteed real loss, dressed up in a certificate. The bank keeps its promise, you receive your interest, and you still end the year poorer in purchasing power than you started.

This guide is the entry point to The Cowrie's full series on saving in a high-inflation economy. It maps every mainstream option available to a Nigerian saver today: bank fixed deposits, Nigerian Treasury bills, fintech savings apps such as PiggyVest and Cowrywise, money market mutual funds, and the dollar-denominated alternatives that more and more households are adding, from domiciliary accounts to dollar funds and stablecoins. For each one, the question is the same: after inflation and after naira depreciation, what is actually left?

How is Nigeria's inflation rate actually measured?

The headline number everyone quotes comes from the NBS Consumer Price Index (CPI). The NBS tracks the prices of a fixed basket of goods and services across all 36 states and the Federal Capital Territory, weights each item by how much the average household spends on it, and compares the basket's cost to the same month a year earlier. That year-on-year change is the inflation rate you read in the news.

Two details matter for savers. First, the basket was rebased in January 2025, with the reference year moved to 2024 and the list of priced items expanded to around 960 product varieties. The rebasing lowered the published headline figure overnight, not because prices fell, but because the basket and its weights changed. Anyone comparing pre-2025 and post-2025 inflation numbers directly is comparing two different rulers.

Second, food and non-alcoholic beverages carry the largest weight in the basket, roughly 40% after rebasing. This is why Nigerian inflation is so sensitive to food prices, and why the NBS publishes a separate food inflation index that has frequently run several percentage points above the headline rate. For a household that spends half its income on food, the personal inflation rate is usually worse than the official one.

The mechanics of the CPI, its weights, its urban and rural splits, and what the rebasing changed are covered in detail in our explainer on how Nigeria's inflation is measured by the NBS CPI.

Why prices accelerated: the fuel subsidy chain

Nigeria's recent inflation surge has a traceable starting point. On 29 May 2023, the petrol subsidy was removed. Pump prices rose from around ₦195.00 per litre to over ₦600.00 within weeks, and beyond ₦1,000.00 in parts of the country after full deregulation in late 2024.

The transmission chain from the pump to the market stall is short and brutal. Petrol powers the buses and trucks that move food from farms in the north to markets in Lagos, Onitsha and Port Harcourt. It powers the generators that keep shops, cold stores and small factories running through grid failures. When the fuel price triples, transport fares follow, then food prices, then everything that depends on transported goods, which is nearly everything.

Layered on top of the subsidy removal came the unification of the exchange rate in June 2023 and the sharp depreciation that followed, with the naira moving from roughly ₦460.00 per dollar to beyond ₦1,500.00 at points in 2024. Because Nigeria imports refined fuel, wheat, medicine, machinery and much of its consumer goods, a weaker naira feeds directly into shop prices.

The result was headline inflation peaking at 34.80% in December 2024, the highest in nearly three decades, according to the NBS. The rate has since come down substantially from that peak as the exchange rate stabilised and the rebased index took effect, but "coming down" means prices are rising more slowly. It does not mean prices are falling. The damage to savings accumulated between 2023 and 2025 is permanent.

The only number that matters: your real return

Here is the concept this entire series is built on, and the one most bank marketing carefully avoids.

Real return = nominal interest rate, minus inflation, minus naira depreciation against the dollar (if you measure your wealth in dollars or buy imported goods).

The first subtraction tells you whether your savings keep up with Nigerian prices. The second tells you whether they keep up with the dollar, which matters if you ever plan to pay foreign school fees, buy imported goods, travel, or simply hold wealth in a currency that does not lose double digits in a bad year.

Work through one concrete example. Suppose you place ₦1,000,000.00 in a one-year bank fixed deposit at 14.00% per annum on 1 June 2025. Assume headline inflation averages 18.00% over the year and the naira weakens by 20.00%, from ₦1,550.00 to ₦1,860.00 per dollar.

• Nominal outcome: you receive ₦1,140,000.00 on 1 June 2026. On paper, you gained ₦140,000.00.
• After inflation: goods that cost ₦1,000,000.00 a year ago now cost ₦1,180,000.00. Your ₦1,140,000.00 buys what roughly ₦966,101.69 bought at the start. Your real naira return is about -3.40%. You worked, you waited, you lost.
• In dollar terms: your ₦1,000,000.00 was worth about $645.16 at the start. Your ₦1,140,000.00 is worth about $612.90 at the end. That is a loss of roughly 5.00% measured in dollars, despite "earning" 14.00%.

Change the assumptions and the arithmetic changes, but the method does not. Before locking any money into any product, run this calculation. We unpack it fully, with calculators and historical data, in real return: interest rate vs inflation vs the dollar.

Does a fixed deposit beat inflation in 2026?

Usually not, and the reason starts at the Central Bank of Nigeria (CBN).

The Monetary Policy Committee (MPC) meets roughly every two months and sets the Monetary Policy Rate (MPR), the benchmark from which all naira interest rates take their cue. Fighting the post-subsidy inflation surge, the MPC raised the MPR aggressively from 11.50% in early 2022 to a peak of 27.50% by late 2024, before beginning a cautious easing cycle in the second half of 2025 as inflation slowed.

In theory, a high MPR should mean high deposit rates. In practice, Nigerian banks pass very little of it on to retail savers. Standard savings accounts are required to pay a minimum linked to the MPR, but the effective rate on most savings balances remains in single digits. Retail fixed deposits typically offer somewhere between 8.00% and 16.00% per annum depending on the bank, the tenor and the size of the deposit, with the best rates reserved for amounts above ₦10,000,000.00 and for customers who negotiate. Interest on fixed deposits is also subject to 10% withholding tax, which quietly shaves the advertised rate: a 14.00% deposit pays 12.60% after tax.

Set those numbers against an inflation rate that has spent most of the past three years between 16% and 35%, and the conclusion writes itself. For most of 2023 to 2026, a typical retail fixed deposit delivered a negative real return. The product is not useless: it is safe, predictable, and NDIC-insured up to ₦5,000,000.00 per depositor per bank since the coverage limit was raised in May 2024. But safety of the nominal amount is not safety of purchasing power.

Treasury bills: the government usually pays more than your bank

Nigerian Treasury bills (NT-bills) are short-term debt instruments issued by the Debt Management Office (DMO) and auctioned through the CBN, with tenors of 91, 182 and 364 days. You are lending to the Federal Government, which makes T-bills the closest thing to a risk-free naira asset.

Three features make them attractive against fixed deposits. First, the rates at primary auctions have generally exceeded retail deposit rates, with 364-day stop rates spending long stretches of 2024 and 2025 between 17% and 23% before easing as the CBN's stance softened. Second, T-bill interest is paid upfront as a discount: you pay, say, ₦830,000.00 today and receive ₦1,000,000.00 at maturity. Third, returns on Federal Government securities are exempt from withholding tax for individuals, so the quoted yield is closer to what you keep.

The entry route matters. You can bid at primary auctions through your bank with a minimum that is often ₦50,000,000.00 or more, which excludes most savers, or you can buy smaller amounts on the secondary market through a stockbroker or through licensed investment apps, where minimums fall to ₦100,000.00 or below. Yields on the secondary route are slightly lower, but accessibility is far better.

T-bills have beaten inflation in some windows and lost to it in others. The full head-to-head, including how auctions work, how to actually buy, and what happens if you need your money early, is in fixed deposit vs Treasury bills.

Fintech savings apps and money market funds

Between the bank and the auction sits a fast-growing middle layer.

Fintech savings apps. PiggyVest and Cowrywise are the two best-known names, operating with partner institutions under CBN and SEC oversight. Their core proposition is behavioural: automated deductions, locked savings with penalties for early withdrawal, and goal-based targets. Advertised returns on locked naira plans have typically ranged from about 8% to 18% per annum depending on the product and tenor. The honest framing is that these apps mostly repackage the same underlying naira instruments, deposits, commercial paper and government securities, behind a better interface. They solve the discipline problem. They do not solve the inflation problem.

Money market mutual funds. These are SEC-regulated collective schemes, run by licensed fund managers, that pool savers' money into T-bills, commercial paper and bank placements. Minimums are low, often ₦5,000.00 to ₦10,000.00, liquidity is good with redemptions usually settled within days, and yields have tended to track T-bill rates, frequently landing between deposit rates and auction stop rates. The Securities and Exchange Commission publishes the list of registered funds and their net asset values; checking that a fund appears on the SEC list is the first due-diligence step.

Both routes are legitimate and useful. Both remain 100% naira-denominated, which brings us to the structural problem none of them can fix.

Comparing the mainstream options side by side

| Option | Typical yield (per annum) | Liquidity | Currency risk | Who it suits | |---|---|---|---|---| | Bank fixed deposit | 8.00% to 16.00%, minus 10% withholding tax | Locked for tenor; breaking forfeits most interest | Full naira exposure | Savers prioritising NDIC-insured capital over real returns | | Treasury bills | Roughly 15% to 23% in recent cycles, tax-free for individuals | Tradable on secondary market before maturity | Full naira exposure | Savers with ₦100,000.00+ wanting the best risk-free naira rate | | Fintech savings apps | 8% to 18% on locked naira plans | Flexible to locked, depending on plan | Full naira exposure | Savers who need automation and discipline | | Money market funds | Tracks T-bill yields, often 12% to 20% | Redemption within days | Full naira exposure | Small savers wanting T-bill-like yields with low minimums | | Dollar alternatives (domiciliary account, dollar funds, stablecoins) | 0% to 10% depending on vehicle | Varies: instant to several days | Protects against naira depreciation; carries its own platform and price risks | Savers hedging school fees, imports or long-term wealth against the naira |

Read the currency risk column from top to bottom. Four of the five rows say the same thing. A saver can pick the best naira instrument on the table, execute it perfectly, and still watch the dollar value of their wealth shrink in a depreciation year. That is why the fifth row exists.

Why many savers add a dollar leg

Between June 2023 and early 2026, the naira lost well over half of its dollar value at the official window. No naira yield available to a retail saver fully compensated for that move. The rational response, visible in domiciliary account balances and fintech flows, is that Nigerian households increasingly split their savings into a naira leg for local expenses and a dollar leg for long-term value.

The mainstream dollar options are:

• Domiciliary accounts. Standard dollar accounts at Nigerian banks. Funding them with cash or transfers is legal and routine, though banks apply documentation requirements and charges, and the accounts typically pay little or no interest. Their value is preservation, not yield.
• Dollar-denominated mutual funds and Eurobond funds. SEC-registered funds investing in Nigerian sovereign Eurobonds and other dollar assets, with yields historically in the 4% to 8% range. Minimums commonly start around $1,000.00.
• Stablecoins. Digital tokens such as USDT and USDC that aim to track the dollar one-to-one, held through exchanges or wallets. They have become a significant channel for dollar exposure among younger savers because of low minimums and instant transfers, and they carry their own distinct risks: platform failure, regulatory change and the gap between a token and an actual bank dollar. They are a tool to understand before they are a tool to use, and our complete guide to stablecoins and crypto in Nigeria treats them with the scepticism and detail they deserve.

One practical note on measurement: the dollar value of your savings depends on which exchange rate you use, and the gap between the official window and the street rate has its own long history, explained in our complete guide to the dollar-naira parallel market. Whatever rate you reference, the direction of travel over the past decade is not in dispute.

The choice between fintech naira plans and a dollar leg is not either-or, and the trade-offs, costs and realistic yields of each are compared head-to-head in fintech savings apps vs dollar savings.

Putting it together: think in layers, not products

The savers who have come through Nigeria's inflation years in the best shape did not find one magic product. They organised their money in layers:

1. An emergency layer in instantly accessible naira: a high-yield savings or money market fund covering three to six months of expenses. This layer accepts a negative real return as the price of liquidity.
2. A naira yield layer in T-bills or money market funds, capturing the best available risk-free naira rate for money needed within one to two years.
3. A dollar layer for long-term wealth: domiciliary balances, dollar funds, or stablecoins for those who understand them, sized to your real future dollar needs such as education, equipment or relocation.
4. A growth layer, for those with the first three in place, in equities or other risk assets, which sits outside the scope of this guide.

How much goes in each layer depends on income stability, family obligations and time horizon, and we work through the allocation logic, with model portfolios at different income levels, in how to build an inflation-proof portfolio.

The starting point, though, is always the same calculation this guide opened with. Take any product you are offered, in any glossy app or any banking hall. Subtract inflation. Subtract expected depreciation if your goals are dollar-linked. If the number that remains is negative, you now recognise the product for what it is: a slower way to lose. The NBS publishes the inflation data monthly and the CBN publishes the policy rate after every MPC meeting. The numbers are free. Use them.

---

Regulatory note: Bank deposits in Nigeria, including fixed deposits, are insured by the Nigeria Deposit Insurance Corporation (NDIC) up to ₦5,000,000.00 per depositor per bank. Nigerian Treasury bills are obligations of the Federal Government issued via the DMO and auctioned through the CBN. Fintech savings platforms and fund managers named in this article operate under CBN and SEC licences through their respective partner institutions; their mention here is descriptive, not an endorsement. The Cowrie is an independent editorial publication. Nothing in this article is investment advice, and readers should verify current rates, terms and regulatory status directly with the NBS, CBN, DMO, NDIC, SEC and the institutions concerned before committing funds.