Term Deposit Calculator: calculate maturity amount and total interest from your initial deposit, monthly contributions, deposit term, and annual interest rate.
You can combine a starting deposit with optional weekly, monthly, quarterly, or annual contributions, set a start date, maturity date, or term length, and use Advanced options for compounding frequency, contribution timing, and day count convention for a more bank-style result.
The deposit term and start/end dates are linked, so you can think in months or years, or work directly with calendar dates; changing one updates the other. Compounding frequency and contribution timing (start or end of period) both affect the final amount, and day count convention, Actual/365, Actual/360, or 30/360, determines how the calculator converts your deposit period into a year fraction, which can shift results slightly between banks. For broader investing or time-value modeling, see also the related savings, investment, TVM, and loan calculators.
Term Deposit Calculator FAQ
How do I calculate deposit maturity amount?
Enter the initial deposit, interest rate, and either the term or the start and end dates. The calculator returns the maturity amount, total interest earned, and, when used, the total contributions added during the deposit period.
Can I use this as a fixed deposit or CD calculator?
Yes. You can use it for a lump-sum term deposit, fixed deposit, or certificate of deposit style estimate. Leave additional contributions at zero if you want a pure single-deposit maturity calculation.
What is the difference between contribution frequency and compounding frequency?
Contribution frequency controls how often you add money to the deposit. Compounding frequency controls how often interest is applied to the balance. They are separate settings, and both can affect the final maturity amount.
Why does the calculator use both term and dates?
They are linked for convenience. You can think in terms of a deposit term such as 1 year or 6 months, or you can work directly with actual calendar dates. Changing the term updates the end date, and changing the end date recalculates the term.
What does day count convention mean?
Day count convention determines how the calculator converts the deposit period into a year fraction for interest calculations. Actual/365, Actual/360, and 30/360 are common conventions used in financial products and can produce slightly different results.
What is the term deposit maturity formula?
For a lump sum with no added contributions, FV = P(1 + r/m)^(m × t), where P is the initial deposit, r is the annual interest rate, m is the compounding frequency per year, and t is the term in years. Additional contributions are added to this base growth.
