💳 Loans
Personal Loan Calculator — Monthly Instalment & Interest
Calculate monthly instalment, total interest and total repayment for a personal loan in Sri Lanka.
Monthly instalment
LKR 25,393
Total interest
LKR 523,606
Total repayment
LKR 1,523,606
How this is calculated
EMI = P × r × (1+r)^n / ((1+r)^n − 1)
P = loan amount, r = monthly interest rate (annual rate ÷ 12 ÷ 100), n = tenure in months.
Total interest = (EMI × months) − loan amount. Always compare offers on a reducing-balance basis.
Frequently asked questions
How is the monthly instalment calculated?
It uses the standard EMI formula: E = P × r × (1+r)^n / ((1+r)^n − 1), where r is the monthly interest rate and n is the tenure in months.
Does this include fees or insurance?
No. It shows the pure principal + interest instalment. Actual bank offers may add processing fees, stamp duty and insurance.
Reducing balance vs flat rate?
This calculator uses reducing-balance (the fair method). If a bank quotes a lower 'flat rate', ask for the equivalent reducing-balance rate to compare properly.
What's a healthy instalment size?
As a rule of thumb, keep total loan repayments under 40% of your net monthly income to stay comfortable.
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Results are indicative estimates only. Actual rates, taxes and fees vary by institution and change over time. Confirm figures with your bank, employer or a qualified financial advisor before making decisions.