Credit Card Interest Calculator (Sri Lanka)
See how long it takes to clear your credit card balance and how much interest you'll pay at your current APR and monthly payment.
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How this credit card payoff calculator works
The calculator simulates your monthly bill: each month it adds interest at APR/12 to the balance and subtracts your payment. It keeps looping until the balance hits zero. The output is the exact number of months to full payoff plus the total interest paid — the true cost of the balance you're carrying.
Typical credit card rates in Sri Lanka (2026)
Most Sri Lankan credit cards charge 2.5%–3% per month on the outstanding balance, which is 30%–36% AER. Some premium cards go a bit lower on selected transactions, and 0% installment plans on partner merchants are common — but standard revolving credit is always in the 24–36% range.
Tips to escape credit card debt
Never carry a balance you can't clear within 3 months at your current payment rate. Ask your card issuer for a balance-transfer to a personal loan — the rate drops from 30% to 15–20% overnight. Route large purchases through 0% installment plans instead of paying with the card and revolving. And look out for promotional zero-fee balance transfers and reduced APR for new customers.
The real cost of the minimum payment
Paying the minimum (usually 5% of the outstanding) on a Rs. 200,000 balance at 30% APR takes over 8 years and costs more than Rs. 150,000 in interest. Doubling the minimum cuts it to under 3 years. The math strongly rewards even small extra monthly payments.
Frequently Asked Questions
How is credit card interest calculated?
Interest is charged on your outstanding balance, usually calculated daily and billed monthly. If you don't settle the full statement balance by the due date, interest applies — often on new purchases too, from the transaction date.
Why does paying only the minimum take so long?
The minimum payment (typically a small percentage of the balance) mostly covers interest, so very little goes towards the actual debt. The calculator shows how dramatically the payoff time shrinks when you pay more than the minimum.
How can I avoid paying credit card interest entirely?
Pay your full statement balance by the due date every month. Most cards offer an interest-free period on purchases when the previous balance was settled in full.
Does the calculator include late fees or other charges?
No — it calculates interest on the balance only. Late payment fees, annual fees, and cash advance charges are extra, so your real cost could be higher if those apply.
Is it worth transferring my balance or taking a loan to pay off the card?
Because card interest rates are typically much higher than personal loan rates, consolidating card debt into a lower-rate loan can save significant interest. Compare the numbers using both this calculator and the Personal Loan Calculator.
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