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Same principal & rate — see how compounding frequency changes your returns.
| Compounding | Maturity Value | Interest Earned | Effective APY |
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| Year | Opening Balance | Interest Earned | Closing Balance |
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Learn
Different countries, same product. A Certificate of Deposit (CD) in the United States, a Term Deposit in the United Kingdom, Australia, Canada, and New Zealand, and a Fixed Deposit (FD) in India, Singapore, and the UAE are all the same financial instrument: you hand a lump sum to a bank or financial institution, agree to leave it untouched for a fixed period, and receive your original deposit back along with guaranteed interest at the end of that period.
Unlike savings accounts — where the interest rate can change anytime — a fixed deposit locks in the rate on the day you open it. That guarantee is precisely what makes it one of the most popular low-risk savings tools in the world.
The core formula for a compounded fixed deposit is:
For simple interest: Maturity Value = P × (1 + r × t). Simple interest does not roll earned interest back into the principal, so the interest earned each period stays constant throughout the tenure.
The difference between monthly and annual compounding might seem small over one or two years, but at higher interest rates and longer tenures it compounds meaningfully. A $50,000 deposit at 6% for 5 years earns $16,982 with monthly compounding versus $16,911 with annual compounding — $71 more from choosing monthly.
Banks advertise the APR (Annual Percentage Rate) — the nominal interest rate. But the APY (Annual Percentage Yield), also called the Effective Annual Rate (EAR), is the true return after accounting for how often compounding occurs within the year. The formula: APY = (1 + r/n)^n − 1.
A 5% APR compounded monthly gives an APY of 5.12%. When comparing FD rates across banks, always compare APY, not the advertised rate. Two banks offering "5% interest" may have very different effective yields depending on their compounding schedules.
The right tenure depends on when you need the money — and your interest rate outlook:
Short-term (1–12 months): Best for money you may need soon. Rates are lower but you have quicker access. Good for emergency fund overflow or saving for a near-term purchase.
Medium-term (1–3 years): The sweet spot for many savers. Rates are typically higher than short-term while keeping your money accessible on a reasonable horizon.
Long-term (3–5 years): Higher rates, and compound interest has more time to work. Best suited for goals that are at least 3 years away — education, a down payment, retirement supplementation.
Withdrawing a fixed deposit before its maturity date — known as "breaking" the FD or early CD withdrawal — almost always triggers a penalty. Common penalties include forfeiture of 3–6 months of interest for short-term CDs in the US, or a 0.5–1% reduction in the applicable interest rate in India and other markets. Some banks offer no-penalty CDs or flexible term deposits that allow early withdrawal, usually at a slightly lower rate. If liquidity is a concern, look for these products or use a laddering strategy instead.