Personal Loan Calculator (Turkey)
Personal loan installments for Turkey with loan taxes included.
A TRY 100,000 personal loan at 3.5% monthly interest over 12 months costs TRY 10,998.01 per month, TRY 131,976.09 in total (TRY 24,596.99 interest plus TRY 7,379.10 in KKDF+BSMV taxes).
Calculation breakdown
| Monthly installment | ₺10.998,01 |
|---|---|
| Total repayment | ₺131.976,09 |
| Total interest | ₺24.596,99 |
| Total tax (KKDF + BSMV) | ₺7.379,10 |
| Final installment (adjusted) | ₺10.997,98 |
Personal (general-purpose) loans in Turkey carry two taxes that many advertised rates do not show: KKDF at 15% and BSMV at 15%, both charged on the interest that accrues each month. This tool takes the loan amount, the bank's advertised monthly rate and the term in months, then computes the tax-inclusive monthly installment, total repayment, total interest and total tax using the equal-installment (annuity) method.
How is it calculated?
Turkish banks structure personal loans as equal-installment (annuity) loans. The calculation has three steps:
- Effective monthly rate: the advertised rate is grossed up by the loan taxes charged on interest — KKDF (15%) and BSMV (15%):
effective = nominal × (1 + KKDF + BSMV). - Installment: the annuity formula gives the payment:
installment = principal × r(1+r)ⁿ / ((1+r)ⁿ − 1), whereris the effective monthly rate andnis the term in months. - Payment plan: each month, interest accrues on the remaining principal, KKDF and BSMV are charged on that interest, and the rest of the installment reduces the principal. Because kuruş rounding accumulates, the final installment is adjusted by a few kuruş so the balance closes exactly.
All amounts are computed as integer kuruş (cents); rounding is half-up to the kuruş.
| Parameter | Value | Source |
|---|---|---|
| RUSF (consumer loans) | 15% | RG 07.07.2023/32241 (BSMV, 7345 CK) + RG 28.10.2010/27743 (KKDF) (2026-06-12) |
| BITT (consumer loans) | 15% | RG 07.07.2023/32241 (BSMV, 7345 CK) + RG 28.10.2010/27743 (KKDF) (2026-06-12) |
Example
Two banks may advertise the same monthly rate, yet the installment is driven by the effective rate after taxes — so a naive "principal × rate × months" estimate understates the real cost. A longer term lowers the monthly payment but increases total repayment, since interest accrues for longer. Enter your own amount, the advertised monthly rate and the term in the tool above; the breakdown shows interest, KKDF and BSMV as separate lines.
Frequently asked questions
What are KKDF and BSMV on Turkish personal loans?
They are loan taxes charged on the interest accrued each month: KKDF (Resource Utilization Support Fund levy) at 15% and BSMV (Banking and Insurance Transactions Tax) at 15% of the interest as of 2026. They are collected inside the installment together with the interest.
Should I enter a monthly or an annual interest rate?
Enter the monthly nominal (contractual) rate. Turkish banks normally advertise consumer-loan pricing as a monthly rate; if you only have a simple annual rate, dividing it by 12 gives an approximate monthly figure.
Why is the effective rate higher than the advertised rate?
Because KKDF and BSMV are charged on top of every month's interest, the cost behaves as if the monthly rate were the advertised rate grossed up by both taxes. The tool applies this automatically — you enter only the advertised rate.
Are arrangement fees and insurance included?
No; the tool models the payment plan of principal, interest, KKDF and BSMV only. Origination fees and optional life insurance vary by bank and add to the total cost separately.
Why do equal installments split differently each month?
Interest is computed on the remaining balance, so early installments are mostly interest and taxes while later ones are mostly principal. The installment amount stays the same; only its internal split shifts over the term.
Why is the last installment slightly different?
Monthly interest and tax amounts are rounded to the kuruş, and these tiny differences accumulate over the term. The final installment is adjusted so the loan closes exactly; the tool shows the adjusted amount as a separate line when it differs.