Personal, Mortgage and Auto Loan Calculator
Enter the loan amount, monthly interest rate and term to see the monthly payment, total repayment and full amortization schedule.
This tool gives an estimate only. It uses the standard amortizing loan formula and covers principal and interest only; Turkish charges such as BSMV and KKDF, fees and regulatory caps are not included. Check the final figures with your lender.
How Is a Monthly Loan Payment Calculated?
Banks use the standard amortizing loan (PMT) method. The monthly payment stays the same, but the split between principal and interest shifts each month. Early payments are mostly interest; later ones are mostly principal.
Calculation Formula
Payment = Principal × [r × (1+r)ⁿ] ÷ [(1+r)ⁿ − 1]
r = monthly interest rate · n = term in months
Example Scenario Table
| Scenario | Monthly Payment | Total Repayment | Total Interest |
|---|---|---|---|
| 500,000 TRY mortgage (2.49%/mo) 120 mo | ≈ 13,137 TRY | ≈ 1,576,392 TRY | ≈ 1,076,392 TRY |
| 100,000 TRY personal (3.99%/mo) 24 mo | ≈ 6,552 TRY | ≈ 157,247 TRY | ≈ 57,247 TRY |
| 250,000 TRY auto (2.99%/mo) 48 mo | ≈ 9,876 TRY | ≈ 474,057 TRY | ≈ 224,057 TRY |
| 50,000 TRY personal (4.50%/mo) 12 mo | ≈ 5,483 TRY | ≈ 65,800 TRY | ≈ 15,800 TRY |
* Rounded results from the calculator's own formula. KKDF, BSMV and allocation fees are not included.
Relationship Between Principal, Interest Rate and Term
These three values affect each other. With a fixed principal, a longer term lowers the monthly payment but noticeably raises the total interest paid. Lowering the rate reduces both the monthly payment and total repayment. The calculator runs in three modes: payment, maximum loan amount, or effective interest rate. Enter any two known values and it will solve for the third.
Impact of BSMV and KKDF Taxes on Payments (Turkey)
Turkish consumer loans carry two charges on the interest: BSMV (Banking and Insurance Transaction Tax, 15%) and KKDF (Resource Utilization Support Fund, 15%). On personal and auto loans, 30% of each month's interest is added to the payment, so a 3% monthly rate costs about 3.9% a month once both are included (3 × 1.30). Mortgages are exempt from both. This calculator does not add BSMV or KKDF; it uses the rate you enter as is.
Personal Loan
KKDF + BSMV = 30%
Auto Loan
KKDF + BSMV = 30%
Mortgage
Exempt ✓
Legal Limits to Watch When Borrowing in Turkey
BDDK Maximum Term Limits for Personal and Auto Loans
The Banking Regulation and Supervision Agency of Turkey (BDDK) sets maximum terms on consumer lending to limit overborrowing. The personal loan limits come from the BDDK decision of 13 February 2025. Auto loan terms depend on the vehicle's final invoice value: 48 months up to 400,000 TRY, 36 up to 800,000, 24 up to 1,200,000, 12 up to 2,000,000, and no loan above that. Domestically produced electric cars have higher thresholds (48 months up to 2,500,000 TRY).
| Loan Type | Maximum Term | Tax Status |
|---|---|---|
| Personal Loan | 36 months (up to 125,000 TRY), 24 months (up to 250,000 TRY), 12 months (above) | KKDF + BSMV |
| Auto Loan | 12-48 months by vehicle price | KKDF + BSMV |
| Mortgage | No BDDK cap | Exempt |
| Small Business / SME Loan | Variable | Exempt or BSMV |
Appraisal Value and Loan-to-Value Limits on Mortgages
Mortgage lenders use the value set by an independent appraiser, not the price recorded on the title deed. Under the BDDK decision of 29 January 2026, the LTV (Loan to Value) ceiling depends on the home's value and energy class: for homes up to 5 million TRY it is 90% (class A-B), 80% (class C) or 70% (other classes); above 20 million TRY it is 40%, 30% and 20%.
Maximum Loan = Appraisal Value × LTV ratio
Example: 5,000,000 TRY appraisal, class C (80%) → maximum loan 4,000,000 TRY · down payment 1,000,000 TRY
Other Factors That Affect Loan Cost
Origination Fees and Insurance
The monthly payment and interest rate do not show the full cost of borrowing. Add these items too:
Origination Fee
Allocation fee max 0.5% (TCMB cap)
Life Insurance
Not legally required, lenders may ask
Home / DASK Insurance
Mandatory on mortgages
TFF (Total Financing Cost) combines interest, all fees and insurance into a single annual figure. Use it to compare lenders on the same basis.
Effect of Early and Partial Prepayment
Partial payments during the term, or paying off early, remove interest that has not yet accrued and noticeably reduce total repayment. The amortization schedule shows that interest is front-loaded, so prepayments made early in the term save the most.
Early Payoff Fee
Fixed-rate mortgages only, max 1-2%
Interest Savings
All interest on remaining months
Partial Payment Effect
Lower principal, shorter term