How to Lower Your Loan Rate in Türkiye

Formula

i = r × (1 + KKDF + BSMV)

A = P × i / (1 − (1 + i)^(−n))

• r: the contractual monthly rate; the rate you agree with the bank
• KKDF, BSMV: the legal rates added to the interest; they depend on the loan type, not on negotiation
• i: the monthly rate with taxes
• n: the term in months
• P: the loan amount; early repayment closes the principal left and removes the interest still to come
• A: the monthly installment

The installment and the total cost move with these values. The contract sets r and n, the law sets KKDF and BSMV, and early repayment closes what is left of the loan.

Step-by-step example

A 100,000 TRY personal loan for 12 months, KKDF and BSMV 15%, at 2.5% a month instead of 3%:

1. Start: the rate with taxes is 3% × 1.30 = 3.9%; the installment is 10,593.48 TRY; the total repayment is 127,121.80 TRY.
2. Rate 0.5 points lower: the rate with taxes is 2.5% × 1.30 = 3.25%; the installment is 10,196.72 TRY; the total repayment is 122,360.59 TRY.
3. Find the difference: the installment falls by 396.76 TRY (3.75%) and the total repayment by 4,761.21 TRY.

KKDF and BSMV are charged on the interest, so a lower rate also lowers the taxes. The rates in the example are illustrations, not market rates.

The effect of each value

One change at a time from a 100,000 TRY loan over 12 months at 3% a month, KKDF and BSMV 15%:

• The interest rate lowers both the installment and the total repayment. Read a rate cut in percentage points, not percent: going from 3% to 2.5% is a cut of 0.5 points.
• A longer term lowers the installment but raises the total repayment by 28,679.18 TRY (22.56%). A shorter term does the opposite: a higher installment, a lower total cost.
• KKDF and BSMV depend on the loan type. On consumer loans in Türkiye both are 15% (Council of Ministers Decision 2010/974; Presidential Decision 7345). BSMV is not charged on the housing loan of a consumer who owns no registered house on the loan date (Law 6802 art. 29/1-y); on housing loans both rates are usually 0.

Early repayment and the annual cost rate

If you close the same 12-month loan after 6 installments, you pay the remaining principal of 55,713.76 TRY. The last 6 installments would have cost 63,560.92 TRY, so you skip 7,847.16 TRY of interest and taxes. Consumer loans carry no early repayment fee (Law 6502 art. 27). On a fixed-rate housing loan the fee is at most 1% or 2% of the prepaid principal (art. 37/2).

The installment leaves out file fees and insurance, so two loans at the same rate can cost different amounts. When you compare offers, use the annual cost rate, which shows interest, taxes and fees together.