Treasury Bills in Nigeria Explained: A Complete Beginner’s Guide
If you’ve been hearing about Treasury bills and wondering what they actually are, you’re not alone. Most Nigerians hear “T-bill” and think it’s something reserved for bankers and wealthy investors. It’s not.
A Treasury bill is simply a short-term loan you give to the Federal Government. You lend them money. They pay you back with interest in 91 days, 182 days, or 364 days. That’s it. No share prices to track. No earnings reports to read. No waking up to check whether your investment crashed overnight.
I remember my first T-bill. I walked into my bank, filled out a form, and waited. A few days later, I got confirmation: the government had taken my money and agreed to pay me 20% interest. One year later, the full amount plus profit landed back in my account. No stress. No drama. Just a date on the calendar and money in the bank.
I’ll break it all down — no jargon, no confusion. If you’re completely new to fixed income investing, the complete guide to fixed income investments in Nigeria gives you the full picture.
What You’ll Learn
By the end of this guide, you’ll know:
- What Treasury bills are and how they work
- The difference between discount rate and true yield
- How much you need to start investing
- How T-bill rates are determined
- The risks involved (and why they’re minimal)
- How to buy Treasury bills through banks, apps, and brokers
- Common mistakes beginners make
Quick Answer: What Is a Treasury Bill?
A Treasury bill is a short-term debt instrument issued by the Central Bank of Nigeria (CBN) on behalf of the Federal Government. You buy it at a discount to its face value and receive the full face value at maturity. The difference between what you paid and what you receive is your profit.
For example, if you pay ₦83,000 for a 364-day T-bill with a face value of ₦100,000, you earn ₦17,000 when it matures. The government borrows your money, uses it for a year, and pays you back with interest. If you’re comparing Treasury bills with fixed deposits to decide which suits you better, we’ve broken down the full comparison — including returns, tax, and liquidity — in the fixed deposit vs Treasury bills guide .
Treasury bills are considered the safest investment in Nigeria because they’re backed by the full faith of the Federal Government. Nigeria has never defaulted on its local currency debt.
How Do Treasury Bills Work in Nigeria?
Here’s the mechanics, explained without the textbook language.
Primary Market: The CBN Auction
Treasury bills are issued through regular auctions conducted by the CBN. These auctions
happens every two weeks. At each auction, the CBN offers a specific amount of T-bills across three tenors: 91 days, 182 days, and 364 days.
Investors — both individuals and institutions — submit bids stating how much they want to invest and at what discount rate. The CBN collects all bids and determines a stop rate — the highest rate at which it will sell T-bills. If your bid is at or below the stop rate, you get an allocation. If you bid too high, you may not get any.
Most individual investors don’t bid directly. Instead, their bank or broker bids on their behalf. You simply tell your bank how much you want to invest and for how long, and they handle the rest. I’ve done this multiple times — it’s far simpler than it sounds.
Secondary Market: Buying and Selling Before Maturity
Once T-bills are issued, they can be traded on the secondary market through the FMDQ Securities Exchange. This means if you need your money before maturity, you can sell your T-bill to another investor.
But selling before maturity carries price risk. If interest rates have risen since you bought, your T-bill may sell at a discount, and you could get back less than you paid. If you hold until maturity, you avoid this risk entirely.
A friend of mine once sold a 364-day T-bill six months early because he needed cash urgently. Rates had gone up, so he took a small loss. He still talks about that mistake. The lesson: only lock money you truly won’t need.
What Happens at Maturity
When your T-bill matures, the CBN automatically credits the face value to your bank account. You don’t need to do anything. The money arrives on the maturity date, and you can choose to reinvest it, spend it, or move it elsewhere.
How Treasury Bill Returns Are Calculated
This is where many beginners get confused. Let me clear it up once and for all.
Discount Rate vs True Yield
Treasury bills are quoted using a discount rate. But the discount rate is not your actual return. Your actual return is called the true yield or effective yield.
- Discount rate: The percentage discount applied to the face value. It tells you how much less you pay upfront.
- True yield: The actual annualised return on the money you invested. It’s higher than the discount rate because you’re earning interest on a smaller upfront amount.
I’ve seen too many people get excited about a 20% discount rate, not realising the true yield is closer to 25%. That’s a meaningful difference — especially on larger amounts.
A Real Example
Suppose you buy a 364-day Treasury bill with a face value of ₦500,000 at a discount rate of 20%.
- Upfront cost: ₦500,000 − 20% = ₦400,000 (approximately)
- Profit at maturity: ₦500,000 − ₦400,000 = ₦100,000
- True yield: (₦100,000 ÷ ₦400,000) × 100 = 25%
Your discount rate was 20%, but your true yield is 25%. Always ask for the true yield, not just the discount rate.
Quick Reference Table
| Face Value | Discount Rate | Upfront Cost (approx.) | Profit | True Yield |
| ₦100,000 | 18% | ₦82,000 | ₦18,000 | ~22% |
| ₦500,000 | 20% | ₦400,000 | ₦100,000 | ~25% |
| ₦1,000,000 | 22% | ₦780,000 | ₦220,000 | ~28% |
Play with your own numbers using our Treasury Bill Calculator .
How Much Do You Need to Start?
The minimum investment depends on where you buy.
| Platform | Minimum Investment |
| Commercial banks (GTB, UBA, Access, Zenith, etc.) | ₦100,000 (the extra ₦1 is a CBN requirement) |
| Investment apps (Bamboo, i-invest) | As low as ₦1,000 (through pooled funds) |
| Stockbrokers ( ARM, Stanbic IBTC, Afrinvest) | Typically ₦50,000–₦100,000 |
If you’re starting with less than ₦50,000, use an app. They pool funds from multiple small investors to meet the institutional minimums, then distribute returns proportionally. That’s how I started — with just ₦10,000 on an app. Small, but it taught me the mechanics without risking serious money.
For a complete breakdown of minimums across every platform, see the guide to minimum amounts for Treasury bills .
What Determines Treasury Bill Rates?
T-bill rates are not fixed. They change at every auction based on several factors:
- CBN monetary policy: When the Central Bank raises or lowers the Monetary Policy Rate (MPR), T-bill rates typically move in the same direction. In 2026, rates have been elevated as the CBN fights inflation.
- Inflation expectations: If investors expect inflation to rise, they demand higher rates to compensate.
- Liquidity in the banking system: When banks have excess cash, they bid aggressively for T-bills, pushing rates down. When liquidity is tight, rates rise.
- Government borrowing needs: When the government needs to raise more money, it may offer higher rates to attract investors.
You can check current CBN rates at cbn.gov.ng .
Are Treasury Bills Taxed?
Yes. Treasury bill returns are subject to a 10% withholding tax, deducted at source by your bank or broker before the money reaches you.
If your T-bill earns ₦100,000 in profit, the bank deducts ₦10,000 as tax, and you receive ₦90,000. It stings a little, but it’s automatic — you don’t need to file anything separately.
For a full breakdown of how tax works across all fixed income instruments, see the tax on fixed income investments guide .
Risks You Should Know
Treasury bills are the safest investment in Nigeria, but “safe” doesn’t mean “no risk.”
Default Risk
Almost zero. The Federal Government has never defaulted on naira-denominated debt. If the government cannot pay, the CBN can create the money — because the debt is in naira, not dollars.
Inflation Risk
If your T-bill earns 20% but inflation is running at 28%, your real return is negative. Your money grows on paper but buys less. This is the one that catches most people off guard. Use our Nigerian Inflation Rate Tracker to stay aware.
Liquidity Risk
If you buy a 364-day T-bill and need the money after three months, you’ll have to sell on the secondary market — potentially at a loss if rates have moved against you. Only lock money you won’t need before maturity.
Reinvestment Risk
Your T-bill matures at 20%. By then, rates have fallen to 14%. You have to reinvest at a lower rate. Laddering your investments (buying different tenors) helps manage this.
The fixed income risks guide covers all of these in more depth.
How to Buy Treasury Bills in Nigeria
You have three main options.
1. Through Your Bank
Minimum: ₦100,000
Visit your bank branch or use internet banking. Fill out a T-bill subscription form with your preferred amount and tenor. The bank debits the discounted amount from your account and handles the auction bidding. At maturity, the face value is credited automatically.
Best for investors with ₦50,000+ who want direct ownership.
2. Through an Investment App
Minimum: As low as ₦10,000
Apps like Bamboo, and i-invest let you buy fractional T-bills. You fund your wallet, select a T-bill product, and confirm. The app pools your money with other investors and distributes returns proportionally.
Best for beginners and small investors.
3. Through a Licensed Stockbroker
Minimum: Typically ₦20,000–₦500,000
If you already have a brokerage account for stocks, many brokers also offer T-bill purchases. This keeps all your investments in one place.
The guide to buying Treasury bills in Nigeria covers every method with screenshots.
Mistakes Beginners Make
| S/N | Mistake | How to Avoid It |
| 1 | Confusing discount rate with true yield | Always ask for the true yield, or use our Treasury Bill Calculator. |
| 2 | Locking emergency funds in a 364-day T-bill | Keep emergency savings in a Money Market Fund. Only lock money you won’t need. |
| 3 | Putting everything into one tenor | Ladder your investments across 91-day, 182-day, and 364-day T-bills. |
| 4 | Ignoring inflation | A 20% return means nothing if inflation is 28%. Check the tracker regularly. |
| 5 | Not comparing platforms | Bank minimums are higher. Apps offer lower entry points. Compare before committing. |
Frequently Asked Questions
What is the minimum amount to buy Treasury bills in Nigeria?
₦100,000 at banks. As low as ₦10,000 through investment apps that pool funds.
How are Treasury bill returns calculated?
You buy at a discount to face value. Your profit is the difference. True yield is higher than the quoted discount rate.
Can I lose money in Treasury bills?
Not if you hold until maturity. Selling before maturity could result in a loss.
Are Treasury bills taxed?
Yes, a 10% withholding tax applies.
How often do T-bill rates change?
Every two weeks at CBN auctions.
Can I buy Treasury bills with my phone?
Yes. Apps like i-invest and Bamboo let you buy from your smartphone.
What’s the difference between Treasury bills and FGN bonds?
T-bills are short-term (up to 1 year) and taxed at 10%. FGN bonds are long-term (2–30 years), pay interest semi-annually, and are tax-exempt.
Key Takeaways
- Treasury bills are short-term loans to the Federal Government — the safest investment in Nigeria.
- You buy at a discount and receive full face value at maturity. Your true yield is higher than the discount rate.
- Minimum investment is ₦100,000 at banks, or as low as ₦10,000 through investment apps.
- T-bill returns are subject to 10% withholding tax.
- Rates change every two weeks at CBN auctions. In 2026, rates have ranged from 18% to 24%.
- Hold until maturity to avoid price risk. Ladder your investments to manage reinvestment risk.
- Understanding Treasury bills in Nigeria is the foundation of fixed income investing — start here, then explore bonds and other instruments.
Your Next Step
Use our Treasury Bill Calculator to see exactly what your money can earn. Enter your investment amount, discount rate, and tenor — it shows your upfront cost, profit, and true yield in seconds.
When you’re ready to buy, the step-by-step guide to buying Treasury bills in Nigeria walks you through every method — bank, app, and broker — with screenshots.
Let’s hear from you.
Have you bought a Treasury bill before, or are you still researching whether it’s right for you? Drop a comment below. I read every single one, and your question might help another beginner take the leap.
If this guide made T-bills feel less complicated, share it with a friend who’s still keeping all their money in a savings account. The more Nigerians who understand how to put their money to work, the stronger we all become.
Disclaimer: This content is for educational purposes only and does not constitute financial advice. All investments carry risk, including the possible loss of capital. Rates and minimums are based on publicly available information as of mid-2026 and may change. Please do your own research or consult a licensed financial advisor before making any investment decision.
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