Interest & Time Deposit Calculator

Calculate simple interest, compound interest, and the after-tax net return of your time deposit.

Runs 100% in your browser — your information is never sent to a server.
Results are for informational purposes only; the exact amount your bank applies may differ.
Interest Amount
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Total Amount
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Gain
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Total Amount
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Enter the current withholding tax rate — it varies by term and period.
Gross Interest
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Net Interest
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Net Total
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Frequently Asked Questions

With simple interest, the return is calculated only on the original principal (Interest = Principal × Rate × Time). With compound interest, the interest earned each period is added to the principal and continues earning interest in the next period (A = Principal × (1 + Rate/n)n×Time, where n is the compounding frequency). At the same rate and duration, compound interest yields more than simple interest.

In Turkey, the withholding tax rate on deposit interest depends on the term (e.g. up to 6 months, up to 1 year, more than 1 year), the deposit type (TRY/foreign currency/gold) and can change from time to time by presidential decree. That's why this tool doesn't hard-code a fixed rate — you should check the current rate with your bank or the Revenue Administration and enter it yourself.

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