What Nigerians Must Know About the Treasury Bills “Guaranteed Return” Myth

The phrase “guaranteed return” has become one of the easiest ways to sell Treasury Bills to Nigerians. It sounds comforting at a time when shares can fall, businesses can fail and many investment platforms have disappeared with people’s money. A bank officer, fintech app or investment adviser may describe Treasury Bills as risk-free and assure you that your return is guaranteed. That statement contains some truth, but it leaves out several conditions that affect what you eventually gain. Treasury Bills are among the safest naira investments available, yet safety does not mean that every expected financial result is guaranteed.

A Nigerian Treasury Bill is a short-term debt issued on behalf of the Federal Government of Nigeria. In simple terms, the government borrows money from investors and promises to repay it on an agreed date. The common tenors are 91 days, 182 days and 364 days, although the exact securities available depend on the auction calendar. The Central Bank of Nigeria conducts auctions and publishes information such as the tenor, maturity date, subscription amount, successful bid rates and true yield on its government securities portal. Banks and other authorised dealers help investors submit bids or buy bills through the secondary market.

Treasury Bills do not usually pay monthly interest like a fixed deposit. They are sold at a discount and redeemed at their full face value when they mature. If a bill has a face value of ₦1 million and you buy it for ₦800,000, the government pays you ₦1 million at maturity. Your nominal gain is ₦200,000, assuming there are no other deductions or charges. The difference between what you paid and what you received is your investment income.

This discount structure is also why advertised rates can confuse people. In the example above, the ₦200,000 gain is 20 per cent of the ₦1 million face value, but it is 25 per cent of the ₦800,000 actually invested. Financial institutions may refer to a discount rate, an investment rate or a true yield, and those figures do not always mean the same thing. The day-count method and the time remaining before maturity also affect the calculation. Before investing, ask for the exact amount that will leave your account and the exact amount expected at maturity.

A second source of confusion is the way annual rates are presented for shorter bills. If a 91-day bill is quoted at an annual rate of 20 per cent, you are not receiving 20 per cent after three months. The return for the actual holding period will be only a portion of that annual rate. Someone investing ₦1 million should not expect to collect ₦200,000 after 91 days merely because the advertisement displays 20 per cent per annum. The contract note or investment confirmation should show the purchase price, face value, maturity date and expected proceeds clearly.

What Treasury Bills offer is a strong promise that the Federal Government will repay the face value at maturity. CBN guidance describes Nigerian Treasury Bills as obligations of the Nigerian Government and short-term securities issued for periods of up to one year. This government backing makes them much safer than lending money to a private company, cooperative society or unknown investment platform. If you buy a genuine bill through the correct channel and hold it until maturity, the nominal naira payment is highly predictable. This is the narrow meaning behind the word “guaranteed.”

The mistake begins when that narrow promise is extended to every part of the investment. The government’s obligation does not guarantee that your money will retain its purchasing power. It does not guarantee that the naira will remain stable against the dollar, pound or euro. It does not guarantee that you can sell the bill early without losing money. It also does not guarantee that the person or platform collecting your money is honest.

Government backing reduces credit risk, but it does not remove every possible risk from existence. A sovereign government generally has more ways to meet a naira obligation than a private borrower because it can collect taxes, issue new debt and manage public finances. That makes default less likely, but “less likely” and “impossible” are not the same statement. Governments can face debt stress, revenue shortages, political disruption and serious fiscal pressure. A careful investor should describe Treasury Bills as low-credit-risk instruments rather than magical assets that cannot go wrong.

For most Nigerian investors, inflation is the greatest risk attached to Treasury Bills. Suppose you invest ₦1 million and receive ₦1.2 million one year later. On paper, you have made ₦200,000 and your account balance has increased. However, if the food, rent, transport, medicine and school fees that previously cost ₦1 million now cost ₦1.3 million, your money has lost purchasing power. You are richer in nominal naira terms but poorer in what that naira can buy.

This difference is known as the gap between nominal return and real return. Nominal return measures how much naira you gained. Real return considers what remains after inflation has reduced the value of that gain. A positive Treasury Bill return can therefore produce a negative real return. When an adviser calls the return guaranteed, ask whether the return is guaranteed to beat inflation, because the answer is no.

Inflation does not affect every investor in exactly the same way. A person saving for locally produced food has a different spending pattern from someone saving for imported medical treatment. A parent preparing for university fees may experience price increases that are higher than the general inflation figure. A business owner saving to import equipment may be more exposed to the exchange rate than to the average consumer price index. Your personal inflation rate is determined by the things you intend to buy.

Naira depreciation creates another gap between a guaranteed payment and a successful investment. A Treasury Bill may pay exactly what was promised in naira while the naira loses value against foreign currencies. If you invest the equivalent of $1,000 today and the maturity proceeds are worth only $850 one year later, you have suffered a currency loss despite earning a naira return. This matters to Nigerians saving for foreign tuition, international travel, imported machinery or medical treatment abroad. A naira Treasury Bill cannot guarantee the foreign currency value of your money.

The next risk appears when you need your money before maturity. Treasury Bills can be traded in the secondary market, which gives investors a possible exit route. However, the price you receive depends on market conditions at the time you sell. If market interest rates have risen since you bought your bill, an investor can buy a newer bill offering a better return. Your older bill may therefore need to be sold at a lower price to attract a buyer.

Imagine that you bought a 364-day bill when market rates were 15 per cent. Two months later, similar bills begin offering 22 per cent. A buyer has little reason to pay full value for your lower-yielding bill when a better option is available. You may have to accept a discount that reduces your expected gain or cuts into your capital. The face value remains payable at maturity, but you are not waiting until maturity because you need cash now.

The opposite can happen when market rates fall. An older bill carrying a better return may become more valuable because new bills offer less. You might then sell it for more than you paid, depending on the remaining tenor and market price. This possibility does not make the original return more guaranteed. It simply shows that the market value of a Treasury Bill can change before its maturity date.

Liquidity is often discussed too casually. A security may have an active secondary market, but that does not mean cash will enter your account the same minute you request it. Your bank or investment firm may need time to obtain a quote, process the sale and complete settlement. The price may also be less attractive when you are desperate to sell. Treasury Bills should not be treated as a complete replacement for money needed immediately during an emergency.

This is why I would not advise someone to lock every available naira into a 364-day bill. A medical emergency, rent demand or family problem may arise before the maturity date. Selling early could expose the investor to an unfavourable market price and administrative delays. A sensible plan keeps some money in an accessible account while investing only the portion that can remain untouched. The expected return should never be allowed to destroy basic liquidity.

Reinvestment risk is another part of the guarantee myth. A high rate available today may not still be available when your bill matures. If you earn an attractive return for 364 days and market rates later fall, you may have to reinvest at a much lower rate. The government guaranteed the payment attached to the bill you bought, not the rate available on the next bill. Anyone building a long-term income plan must account for this uncertainty.

This issue matters when people begin to treat a temporary high rate as a permanent salary. Someone may invest ₦20 million during a period of high Treasury Bill yields and start spending the expected income before it arrives. At maturity, the person may discover that the next available rate is much lower. Maintaining the same lifestyle could then require spending part of the principal. A short-term security cannot guarantee a fixed income for the next ten years.

Auction risk also deserves attention. Before an auction closes, the final successful rate is not known with certainty. Investors submit bids, the CBN reviews them, and some bids may be accepted while others are rejected. The rate discussed by your bank before the auction is often an indication based on market expectations. It is not necessarily the final rate you will receive.

The published auction headline can be misleading as well. News reports often focus on the highest or marginal rate without explaining that not every investor received that exact figure. An institution may have submitted a different successful bid, while a retail customer may have bought through another arrangement. A bill purchased later in the secondary market will also have a price based on the conditions at that time. Ask your provider to state the rate and expected maturity value attached to your own transaction.

Fees and spreads can reduce the return that reaches you. A bank, broker, fund manager or digital platform may charge a transaction fee, management fee, custody charge or early-exit cost. Some providers do not display the charge as a separate debit because they build their margin into the rate offered to the customer. The rate shown on the CBN auction page may therefore be higher than the rate a retail investor receives. Your decision should be based on the net amount, not the most attractive public headline.

Tax must also be considered when calculating net return. The Nigeria Tax Act 2025 defines interest broadly to include income from government securities and returns on discounted debt instruments. The exact treatment can depend on the investor, the product structure and the rules in force when the income is earned. This does not mean every investor will face the same deduction in every situation. It means nobody should assume that a quoted gross rate is automatically the amount available to spend.

The word “Treasury Bill” is also used loosely by some sellers. A fintech platform may say that customer funds are invested in Treasury Bills, while the actual product is a money market fund containing Treasury Bills, commercial paper, bank placements and other assets. A bank may offer a managed product whose return is linked to government securities without giving each customer direct ownership of a specific bill. These products may still be legitimate, but they are not identical to buying a Treasury Bill directly. Their fees, withdrawal rules, returns and risks can be different.

When I see an investment advert promising a fixed monthly return from Treasury Bills, I become cautious. A genuine Treasury Bill is normally bought at a discount and redeemed at maturity rather than paying a monthly coupon. A provider can create a separate product that pays customers monthly, but the provider must explain how that structure works. The monthly payment may come from a pooled fund, an advance from the provider or the sale of other assets. Calling the entire arrangement a Treasury Bill does not make every part of it a government obligation.

Fraud is one risk that government backing cannot cover. A criminal can design a convincing app, use the logo of a known institution and claim to sell Federal Government securities. The money may never reach the Treasury Bill market. The investor does not own a government security simply because a dashboard displays an investment balance. In that situation, the Federal Government has no bill to redeem because no genuine bill was purchased.

The Securities and Exchange Commission’s operator register allows investors to check whether a capital-market firm is registered and what services it is authorised to provide. SEC has also continued to warn the public about unregistered online investment schemes. Registration does not remove investment risk, but it helps you avoid handing money to a completely unknown operator. A polished website, influencer endorsement or office address is not a substitute for regulatory verification.

Proper documentation is just as important as the sales pitch. Ask for a contract note, investment confirmation or statement showing the instrument, purchase date, face value, purchase price, maturity date and expected proceeds. Confirm whether you own a specific Treasury Bill or merely have a claim against the provider. Find out who keeps custody of the security and what happens if the platform stops operating. If the provider avoids clear answers, the phrase “government-backed” should not persuade you to transfer money.

The source of repayment must be understood. With a direct Treasury Bill, the Federal Government’s obligation supports the maturity payment. With a pooled investment product, you may depend on a fund manager, trustee, custodian and other parties to carry out their duties properly. With an informal scheme, you may depend entirely on the promoter’s honesty and ability to find new investors. Those three arrangements should not be treated as if they carry the same protection.

Opportunity cost is another risk that rarely appears in an advert. Once you commit money to a bill, you may miss a better investment that becomes available before maturity. Market rates may rise, a good business opportunity may appear, or the price of a valuable asset may fall. Leaving the bill early may reduce your return, while staying until maturity may mean losing the other opportunity. A predictable payment does not guarantee that the investment was the best use of your money.

This does not mean Nigerians should avoid Treasury Bills. They can be useful for preserving short-term funds, reducing exposure to volatile assets and earning income on money that would otherwise remain idle. They may suit someone saving for a known expense due in three, six or twelve months. They can also help a business keep temporary surplus cash in a relatively secure instrument. The problem is not the Treasury Bill itself, but the careless way the word “guaranteed” is sometimes used.

Your investment period should match the date when you will need the money. If school fees are due in four months, a 364-day bill may create an unnecessary mismatch. If rent is due in ten months, a shorter bill may mature too early and expose you to reinvestment risk. A proper plan works backward from the expense date rather than choosing the tenor with the highest advertised rate. The highest rate is not useful when the maturity date does not suit your needs.

You should also compare Treasury Bills with alternatives that serve the same purpose. A fixed deposit may offer easier terms through your bank, although its rate and early-withdrawal penalty must be checked. A regulated money market fund may provide easier access, but its yield can change and its fees matter. An FGN Savings Bond has a different maturity and payment structure, while equities and property carry different risks entirely. The correct choice depends on your goal, time frame, cash needs and tolerance for price changes.

Never compare investments by looking at headline percentages alone. Compare the actual naira invested, the actual naira expected, the holding period, the maturity date, all fees, tax treatment and the conditions for early withdrawal. Ask whether the rate is annualised or represents the return for the full tenor. Ask whether the displayed rate is a discount rate or a true yield. These questions can reveal a large difference between an attractive advert and the money that eventually enters your account.

The “guaranteed return” myth is therefore not that Treasury Bills are unsafe or that the government routinely refuses to pay them. The myth is the belief that government backing protects an investor from inflation, naira depreciation, early-sale losses, changing rates, fees, taxes, poor timing and fraud. It protects mainly against the issuer failing to honour the valid naira obligation at maturity. Every other part of the investment still requires thought and proper planning.

When someone offers me a Treasury Bill, I want five facts before I consider the rate attractive. I want to know how much leaves my account, the face value of the bill, when it matures, what I receive after deductions and what happens if I need to sell early. I also want proof that the provider is authorised and that the investment is what the provider claims it is. If those details are missing, the word “guaranteed” has little value.

Treasury Bills can protect money from some risks, but they cannot protect it from every risk. They can provide a predictable nominal payment, but they cannot promise that the payment will buy more goods or foreign currency. They can support a short-term savings plan, but they cannot correct a plan built around the wrong maturity date. Nigerians should continue to use Treasury Bills where they fit, while refusing to treat them as a perfect investment. A real guarantee is only as useful as the exact promise, conditions and risks written behind it.