If you've looked beyond the fixed deposit for a safe home for your money, you've probably run into two similar-sounding government instruments: Treasury bills and Treasury bonds. They're close cousins — both are you lending to the Government of Sri Lanka — but they differ in ways that matter for how you'd use them.
The common ground: with both, you are lending money to the government, which pays you interest and returns your capital. Because they carry the government's backing, they're regarded as the safest rupee investments available. The difference is mainly in how long you lend for, and how the interest reaches you.
Treasury bills — the short-term one
A Treasury bill (T-bill) is short-term government borrowing, typically for 91, 182, or 364 days (roughly 3, 6, or 12 months).
- They're sold at a discount: you pay less than the face value up front, and at maturity you receive the full face value. The difference is your interest.
- Because they're short, they're ideal for money you want kept very safe but expect to use within a year.
Think of a T-bill as a safe, short-term parking spot that pays better than a savings account.
Treasury bonds — the longer-term one
A Treasury bond (T-bond) is longer-term government borrowing — two years and beyond, sometimes stretching to many years.
- Instead of a single discount, bonds usually pay periodic interest (called a coupon) during their life, and return your capital at the end.
- Because you're committing for longer, bonds are suited to money you're happy to lock away for years in exchange for a steady, predictable income stream.
Think of a T-bond as a long-term income arrangement with the safest borrower in the country.
Side by side
T-bill vs. T-bond
- Term: bills are short (up to 1 year); bonds are long (2+ years).
- How you earn: bills pay via a discount at purchase; bonds pay periodic interest plus your capital back at maturity.
- Best for: bills = safe short-term parking; bonds = long-term, predictable income.
- Safety: both carry the government's backing — the benchmark for "safe" in rupees.
- How to buy: through a licensed primary dealer or a bank's Treasury desk.
Which should you use?
It comes down to your time horizon and your goal:
- Need the money back within a year, or just want a safe place while you decide? A T-bill fits.
- Want to lock in a steady income for several years and don't need the capital soon? A T-bond may suit.
Both can also be sold before maturity on the secondary market if your plans change, though the price you get then depends on where interest rates have moved — which is a reminder that even "safe" instruments have moving parts worth understanding.
Same borrower, same safety — the choice is really about how long you're willing to wait, and whether you want income along the way.
The bigger picture
T-bills and T-bonds aren't just savings products — they're how the government funds itself, and their interest rates ripple through the whole economy, influencing everything from your fixed deposit rate to the cost of a loan. Understanding them makes you a sharper saver and a better reader of the financial news.