Formula
Gross interest = Deposit × Annual rate × Term in years. Net interest = Gross interest − Entered withholding.
Investment tools
Fixed Deposit Calculator
Estimate simple gross interest, optional withholding, monthly payout, and maturity value for a fixed deposit.
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Your inputs
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Estimated results
How this calculator works
Fixed Deposit
The estimate uses simple prorated interest. Banks may use different compounding, day-count, payout, and tax methods, so confirm an actual offer with the institution.
Simple example
A Rs. 1,000,000 deposit at 9% for 12 months earns an estimated Rs. 90,000 gross interest before any entered withholding.
FAQ
Frequently asked questions
Does this use current Sri Lankan bank rates?+
No. Enter the rate offered to you; the calculator does not fetch or recommend current rates.
Why might a bank quote differ?+
Institutions may use different compounding, day-count, payout, rounding, and tax rules.
Need clearer numbers for your business?
Finance Desk LK can help keep your accounts accurate, organised, and ready for better decisions.