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Uju
Uju
Asked: September 7, 20262026-09-07T21:10:23+00:00 2026-09-07T21:10:23+00:00In: INVESTING & WEALTH BUILDING

How to calculate discounted rates in treasury bills?

What does discounted rate mean in treasury bills?

Treasury Bills
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  1. MARTIAL
    MARTIAL Student de University of Lagos
    2026-09-08T00:04:56+00:00Added an answer about 5 days ago

    Got you 1 *What is discounted rate* It is the interest you earn when you buy a treasury bill below its face value Example CBN sells you 100000 TB for 95000 The 5000 difference is your profit 2 *How to calculate it* Formula Discounted Rate equals Face Value minus Purchase Price divided by Face ValueRead more

    Got you

    1 *What is discounted rate*
    It is the interest you earn when you buy a treasury bill below its face value
    Example CBN sells you 100000 TB for 95000 The 5000 difference is your profit

    2 *How to calculate it*
    Formula
    Discounted Rate equals Face Value minus Purchase Price divided by Face Value times 360 divided by Days to Maturity times 100

    Simple version
    Take the profit divide by face value divide by number of days multiply by 36000

    Example
    Face value 100000 Purchase price 95000 Days 91
    Profit is 5000
    5000 divided by 100000 divided by 91 times 36000 equals about 1978 percent

    Bottom line
    Discounted rate shows how much return you get for buying TB below face value The longer the days and bigger the discount the higher your rate

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  2. Emmanuel Samuel
    Emmanuel Samuel
    2026-09-07T21:22:32+00:00Added an answer about 5 days ago

    Treasury Bills are usually sold at a discount, meaning you pay less than the face value and receive the full face value when the bill matures. The basic formula is: Discount = Face Value × Discount Rate × (Days to Maturity ÷ 365) And: Purchase Price = Face Value − Discount For example, let's say youRead more

    Treasury Bills are usually sold at a discount, meaning you pay less than the face value and receive the full face value when the bill matures.

    The basic formula is:

    Discount = Face Value × Discount Rate × (Days to Maturity ÷ 365)

    And:

    Purchase Price = Face Value − Discount

    For example, let’s say you buy a ₦1,000,000 Treasury Bill with a 15% discount rate and 91 days to maturity.

    Discount:

    ₦1,000,000 × 15% × (91 ÷ 365)
    = ₦37,397.26

    So your purchase price would be:

    ₦1,000,000 − ₦37,397.26
    = ₦962,602.74

    At maturity, you receive the ₦1,000,000 face value.

    So your gross return is approximately ₦37,397.

    One thing to remember: the discount rate is not exactly the same as the investment’s effective annualized return, because the discount is calculated on the face value rather than the amount you actually paid.

    That’s why when comparing Treasury Bills with other investments, it’s important to look at the effective yield, not just the quoted discount rate.

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    • Uju
      Uju
      2026-09-08T06:12:07+00:00Replied to answer about 5 days ago

      Thanks so much.

      Thanks so much.

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  3. Mama Ngozi AI
    Mama Ngozi AI Official Fokona AI Official AI Financial Educator at Fokona
    2026-09-07T21:10:28+00:00Added an answer about 5 days ago

    Mama Ngozi: Ah, my dear, let me explain to you in our own Naija way how to calculate discounted rates in Treasury Bills. Imagine you go to the market to buy tomatoes from me. Normally, you know that a basket of tomatoes costs ₦5,000. But if I tell you today that you can buy a basket for ₦4,500 if yoRead more

    Mama Ngozi: Ah, my dear, let me explain to you in our own Naija way how to calculate discounted rates in Treasury Bills. Imagine you go to the market to buy tomatoes from me. Normally, you know that a basket of tomatoes costs ₦5,000. But if I tell you today that you can buy a basket for ₦4,500 if you pay immediately, that’s like getting a discount, right?

    So, in the world of Treasury Bills, the discounted rate is similar. When the government wants to borrow money for a short time, it issues Treasury Bills. These Bills are like an IOU from the government saying, “I will pay you back this amount after a few months.”

    Now, the price you pay for a Treasury Bill might be less than what it’s worth when it matures. This difference between the face value (what it’s worth when due) and what you pay (the discounted price) is the discounted rate.

    To calculate this discounted rate, you consider the face value, the price you pay, and the time left until it matures. With this info, you can figure out how much of a discount you’re getting and what your effective return will be.

    This helps the government borrow money from people who want a safe and secure way to invest their cash, just like you buying tomatoes at a discount. It’s a win-win for both parties!

    So you see, understanding discounted rates in Treasury Bills is like getting a good deal at the market. It’s a simple concept that helps both the government and investors like you!

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  4. Samuel Ushahemba Iortim
    Samuel Ushahemba Iortim Starter Manager
    2026-09-08T10:30:59+00:00Added an answer about 5 days ago

    In Treasury Bills (T-Bills), a discounted rate means that you buy the Treasury Bill for less than its face value, and the difference between what you pay and the face value is your return. Simple example Suppose a Nigerian Treasury Bill has: Face value: ₦1,000,000 Discount rate: 14% per annum Tenor:Read more

    In Treasury Bills (T-Bills), a discounted rate means that you buy the Treasury Bill for less than its face value, and the difference between what you pay and the face value is your return.
    Simple example
    Suppose a Nigerian Treasury Bill has:
    Face value: ₦1,000,000
    Discount rate: 14% per annum
    Tenor: 91 days
    You do not pay ₦1,000,000 upfront. You pay a discounted amount, and at maturity the government pays you the full ₦1,000,000.
    So, conceptually:
    Amount you invest → ₦965,000 (approximately)
    Amount received at maturity → ₦1,000,000
    Your gain → ₦35,000
    The exact amount depends on the Treasury Bill’s quoted discount rate and the number of days to maturity.
    Why is it called “discount”?
    Because you are buying the security at a discount to its face value.
    Think of it like this:
    Buy for ₦965,000 → receive ₦1,000,000 at maturity → ₦35,000 is your return.
    Important: Discount rate ≠ interest rate
    This is where many new investors get confused.
    A T-Bill quoted at 14% discount rate does not necessarily mean you earn exactly 14% on the money you actually invested.
    For example, if you invest ₦965,000 and receive ₦1,000,000, your return on your actual investment is:
    ₦35,000 ÷ ₦965,000 × 100 ≈ 3.63%
    That 3.63% is for that particular 91-day period. When annualized, the effective yield is different.
    So when comparing T-Bills with savings accounts, money-market funds, OPay savings, etc., look at the yield/effective annual return, not just the quoted discount rate.

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