Türkiye Deposit Interest Calculator: Net Interest
Rules and data: TürkiyeBy Hesaplayıcı
The deposit interest calculator finds the gross interest, the withholding tax, the net interest and the final amount of a Turkish lira time deposit. Enter the principal, the bank's annual gross rate, the term in days and the withholding rate. The calculator counts a year as 365 days and shows every step.
Worked example: 100,000 TRY at 40% a year for 32 days, 17.5% withholding
Net interest
2,893.15 TRY
- Gross interest
- 3,506.85 TRY
- Withholding tax
- 613.7 TRY
- Final amount
- 102,893.15 TRY
Step by step
Gross interest
gross interest = principal × annual rate × days / 365
gross interest = 100,000 × 40% × 32 / 365 = 3,506.85
Withholding tax
withholding = gross interest × withholding rate
withholding = 3,506.85 × 17.5% = 613.7
Net interest
net interest = gross interest − withholding
net interest = 3,506.85 − 613.7 = 2,893.15
Final amount
final amount = principal + net interest
final amount = 100,000 + 2,893.15 = 102,893.15
How to use
- Enter the Principal in TRY.
- Enter the Annual gross interest rate the bank offers for the time deposit.
- Enter the Term in days. The default is 32 days.
- Enter the Withholding rate for your term: 17.5% up to 6 months, 15% up to 1 year, 10% over 1 year.
- Press Calculate.
Formula
Gross interest = principal × annual rate × days / 365Withholding = gross interest × withholding rateNet interest = gross interest − withholdingFinal amount = principal + net interest
The principal is the amount deposited. The annual rate is the bank’s gross rate, written as a decimal: 0.40 for 40%. Days is the length of the term. The withholding rate is the rate in force for the term on the day the deposit is opened or renewed.
Worked example
The worked example on this page shows 100,000 TRY deposited for 32 days at a gross 40% a year. The term is shorter than 6 months, so the withholding rate is 17.5%. The steps give the gross interest, the withholding, the net interest and the final amount.
Limits
The calculator covers one term; it does not compound interest across renewals. Foreign currency, gold, participation accounts and FX-protected deposits are out of scope. You choose the withholding rate: the decision defines terms in months and years, and the calculator does not derive the rate from the days. Amounts are rounded to the kuruş. The withholding rates in the help text are those in force on 13 September 2026.
Frequently Asked Questions
How is deposit interest calculated in Türkiye?
Gross interest is principal × annual rate × days / 365. The net interest is the gross interest minus the withholding tax.
What is the withholding tax on Turkish lira deposits?
For TL time deposits opened or renewed since 9 July 2025, withholding is 17.5% on demand deposits and terms up to 6 months, 15% up to 1 year and 10% over 1 year (Presidential Decision 10041).
Which date sets the withholding rate?
The rate in force on the day the deposit is opened or renewed applies, not the rate on the day the interest is paid.
What is the withholding on a 32-day deposit?
32 days is shorter than 6 months. Deposits opened or renewed since 9 July 2025 pay 17.5% withholding.
How many days a year do Turkish banks count?
Turkish banks count a year as 365 days for TL deposit interest.
Calculation rules
- Gross interest = principal × annual rate × days / 365. Turkish banks count a year as 365 days for TL deposits.
- Withholding tax (stopaj) is deducted from the gross interest. The rate is the one in force on the day the deposit is opened or renewed, and it depends on the term. Since 9 July 2025, TL time deposits pay 17.5% on demand deposits and terms up to 6 months (6 months included), 15% up to 1 year (1 year included) and 10% over 1 year (Presidential Decision 10041, Official Gazette 9 July 2025, no. 32951). The rates are temporary; the latest extension runs to 31 December 2026 (Presidential Decision 11444, Official Gazette 20 June 2026, no. 33286).
- The decision defines the terms in months and years, not days. You choose the withholding rate; the calculator does not derive it from the days.
- Amounts are rounded to the kuruş, half up: first the gross interest, then the withholding tax.
- Interest is paid once at maturity; rolling the deposit over and earning interest on interest is not calculated. Foreign currency, gold, participation accounts and FX-protected deposits (KKM) are left out.