Fixed Deposit Calculator (Sri Lanka)
Enter your FD amount, interest rate and tenure to see maturity value or monthly interest instantly.
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How this fixed deposit calculator works
For "at maturity" FDs the calculator applies monthly compounding: Maturity = P × (1 + r/12)ⁿ, where P is your deposit, r is the annual rate, and n is the number of months. For monthly-interest FDs it computes Monthly interest = P × r / 12 and shows total interest paid across the tenure. Withholding tax is not deducted in this figure — the financial institution deducts it at source when they credit interest.
Typical FD rates in Sri Lanka (2026)
Licensed commercial banks currently pay 8–11% for 1-year FDs. Licensed finance companies usually pay 10–13% with higher senior citizen rates. Rates fluctuate with the central bank policy rate — during easing cycles FD rates fall quickly, so locking in longer tenures during a tightening cycle can pay off.
Tips to get the best FD return
Compare rates before renewing — even a 1% difference on a Rs. 1M FD is Rs. 10,000 per year. Use senior-citizen and staff schemes if eligible. Ladder your FDs (split into 3-, 6-, 12-, 24-month deposits) so you always have some maturing without breaking any early. Keep the balance under the deposit insurance limit per institution.
FD vs government treasury bills
Government T-bills and T-bonds often pay similar or better yields than bank FDs and are effectively risk-free. You can buy them via any primary dealer or licensed bank. For serious savers with over Rs. 500,000, T-bills are worth comparing alongside FDs.
Frequently Asked Questions
What is a fixed deposit?
A fixed deposit is a savings product where you deposit a lump sum for a fixed period (e.g., 3, 6, 12, or 60 months) at an agreed interest rate. Your rate is locked in for the term, making returns predictable.
What's the difference between monthly interest and interest at maturity?
With monthly payout, interest is paid to you each month at a slightly lower rate — useful for regular income. With at-maturity, interest stays in the deposit and compounds, so you receive a larger lump sum at the end. The calculator lets you compare both.
Is FD interest taxed in Sri Lanka?
Interest income may be subject to withholding tax or income tax depending on current regulations and your total income. The calculator shows gross interest; check the prevailing tax rules or ask your financial institution for the net figure.
Can I withdraw my FD before maturity?
Usually yes, but early withdrawal typically means a reduced interest rate or a penalty. If you may need the money sooner, consider a shorter term or splitting your savings into multiple deposits.
Are fixed deposits safe?
Deposits held with licensed and regulated financial institutions in Sri Lanka are covered by a deposit insurance scheme up to a specified limit per depositor per institution. Always confirm the institution is licensed by the regulator.
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