Understanding Nigerian T-Bills and yields

What you are buying

A Nigerian Treasury bill is a short-term obligation of the Federal Government, issued through the Central Bank of Nigeria. The common tenors are 91, 182 and 364 days. Investors use them to place money for a defined period while earning a return linked to the price paid and the amount received at maturity.

Unlike a conventional deposit that credits interest periodically, a bill is commonly sold below its face value. The investor pays the discounted purchase price and receives the face value at maturity. The difference is the gross return before any applicable charges or taxes.

Why the quoted rate can be confusing

Auction results usually show a stop rate or discount rate. A provider may also show a true yield, which relates the return to the lower amount actually invested and annualises it. Two platforms can appear to quote different numbers for the same bill because one displays the discount rate and another displays an effective yield.

On 23 September 2026, the CBN’s key-rates page showed 15.5% for the 91-day bill. That figure is a dated market observation, not a rate available forever. Every auction can clear differently, and a secondary-market purchase can carry a different price again.

• Ask for the amount that will leave your account
• Confirm the face value and exact maturity date
• Request the gross cash return and every fee or deduction
• Compare effective returns over the same holding period

What moves Treasury bill yields

Monetary policy, system liquidity, government borrowing needs, inflation expectations and investor demand all influence auction pricing. Heavy demand can push accepted rates lower. Larger issuance or tighter liquidity can require higher rates to attract buyers.

The relationship with inflation is especially important. A positive nominal return can still lose purchasing power when the prices of goods and services rise faster. Investors should compare the expected net return with their purpose for the money, rather than treating a high percentage as sufficient on its own.

Choosing a tenor starts with the date you need the money

A 364-day bill may offer a different yield from a 91-day bill, but it also commits the money for longer. Selling before maturity introduces market-price and liquidity risk. If prevailing yields rise after purchase, the value available in an early sale can be lower than expected.

A ladder can reduce the risk of placing all funds into one maturity date. An investor might divide an allocation across several maturities, creating periodic opportunities to spend, reinvest or move the money into another asset.

Where T-bills fit and where they do not

Treasury bills can suit money with a defined short-term purpose, a liquidity reserve beyond immediate emergency cash, or capital waiting for another planned investment. Their short tenor and government backing make them a useful reference point when comparing other naira investments. A riskier or less liquid opportunity should explain why its expected return compensates the investor for taking more uncertainty.

T-bills do not provide long-term growth by themselves, and the rate available when a bill matures may be lower. Investors also need to verify provider fees, custody arrangements, early-sale terms and current tax treatment rather than assuming that every channel offers identical economics.