Türkiye Loan Calculator: Installment and Payment Plan
Rules and data: TürkiyeBy Hesaplayıcı
The loan calculator finds the monthly installment, total repayment, total interest and the KKDF and BSMV amounts of an equal-installment Turkish bank loan. Enter the loan amount, the interest rate, the term and the tax rates. The calculator uses the monthly rate with taxes, as Turkish banks do, and shows the monthly payment plan.
Worked example: A 100,000 TRY consumer loan at 3% a month for 12 months
Monthly installment
10,593.48 TRY
- Total repayment
- 127,121.8 TRY
- Total interest
- 20,862.94 TRY
- Total KKDF
- 3,129.43 TRY
- Total BSMV
- 3,129.43 TRY
- Monthly interest rate
- 3.00%
- Monthly rate with taxes
- 3.90%
Step by step
Monthly rate with taxes
i = r × (1 + KKDF + BSMV)
i = 3% × (1 + 15% + 15%) = 3.90%
Monthly installment
A = P × i / (1 − (1 + i)^(−n))
A = 100,000 × 3.9% / (1 − (1 + 3.9%)^(−12)) = 10,593.48
Total repayment
total payment = sum of the installments
total payment = 10,593.48 × 11 + 10,593.52 = 127,121.8
How to use
- Enter the Loan amount in TRY.
- Enter the bank’s contractual Interest rate and choose monthly or yearly in Rate period. Turkish banks usually quote loan rates per month.
- Enter the Term as the number of monthly installments.
- Check the KKDF rate and the BSMV rate. Both are 15% on personal and vehicle loans. For a housing loan, enter the rates in your bank’s payment plan; usually both are 0.
- Press Calculate.
Formula
r = yearly rate / 12(only when you enter a yearly rate)i = r × (1 + KKDF + BSMV)A = P × i / (1 − (1 + i)^(−n))Monthly interest = remaining principal × rKKDF = monthly interest × KKDF rate,BSMV = monthly interest × BSMV ratePrincipal repaid = A − monthly interest − KKDF − BSMV
P is the loan amount (principal), r the contractual monthly rate, i the monthly rate with taxes, n the term in months and A the monthly installment. KKDF and BSMV rates are written as decimals: 0.15 for 15%. Each month, the part of the installment left after interest and taxes reduces the principal.
Worked example
The worked example on this page shows a 100,000 TRY personal loan at 3% a month for 12 months. KKDF and BSMV are 15%. The steps give the monthly rate with taxes, the installment and the total repayment. In the payment plan, the interest part falls and the principal part rises every month.
Limits
The calculator leaves out file fees, life and home insurance, appraisal and mortgage costs, and it does not compute the annual cost rate. The rate stays the same for the whole term. Amounts are rounded to the kuruş; the last installment can differ by a few kuruş. The default KKDF and BSMV rates are the consumer loan rates in force on 13 September 2026; change them if your loan differs. The term is at most 480 months.
Frequently Asked Questions
How do Turkish banks calculate a loan installment?
Banks add KKDF and BSMV to the monthly interest rate: i = r × (1 + KKDF + BSMV). The installment is A = P × i / (1 − (1 + i)^(−n)), where P is the loan amount and n the term in months.
What are KKDF and BSMV on a consumer loan?
KKDF (a fund levy) is 15% and BSMV (a banking transactions tax) is 15% on consumer loans. Both are charged on each month's interest, so a loan at 3% a month costs 3.9% a month with taxes.
Do housing loans carry KKDF and BSMV?
BSMV is not charged on the housing loan of a buyer who owns no registered house on the loan date. For a housing loan, check both rates in your bank's payment plan; usually both are 0.
How is a yearly rate converted to a monthly rate?
The calculator divides the yearly rate by 12. Turkish banks usually quote loan rates per month.
Why is the last installment a few kuruş different?
Each month's interest and taxes are rounded to the kuruş. The last installment repays exactly the principal left, so it can differ by a few kuruş.
Calculation rules
- The installment uses the equal-installment formula with the monthly rate plus KKDF and BSMV: i = r × (1 + KKDF + BSMV), A = P × i / (1 − (1 + i)^(−n)).
- Each month the interest is the remaining principal × r; KKDF and BSMV are shares of that interest. The rest of the installment repays principal.
- A yearly rate is divided by 12 to get the monthly rate.
- Amounts are rounded to the kuruş, half up. The last installment repays what is left and can differ by a few kuruş.
- KKDF on consumer loans is 15% (Council of Ministers Decision 2010/974; Revenue Administration KKDF rate table). BSMV on consumer loans used from 7 July 2023 is 15% (Presidential Decision 7345, Official Gazette 7 July 2023, no. 32241). A vehicle loan to a private person for non-business use is a consumer loan.
- On housing loans, BSMV is not charged to consumers who own no registered house on the loan date (Law 6802 art. 29/1-y as amended by Law 7491). For a housing loan, check both rates in your bank’s payment plan; usually both are 0.
- File fees, insurance, appraisal and mortgage costs and the annual cost rate are not calculated.