How minimum payment is estimated
Quick mode: base minimum = max(balance × minimum %, floor amount)—a simple rule-of-thumb.
Issuer-style mode: adds an approximate monthly finance charge from APR on the outstanding balance to that base minimum.
Real cards differ by statement cycle, grace periods, fees, and rounding—this is guidance, not your official statement.
Example calculation
Balance THB 50,000, APR 16%, minimum 8% or THB 500: quick base is max(4,000, 500) = 4,000. Issuer-style adds monthly interest on top.
Frequently asked questions
- What is a credit card minimum payment?
- It is the lowest amount you need to pay by the due date to keep the account current. Paying at least the minimum helps you avoid late-payment issues, but interest can continue on the remaining balance.
- Is paying only the minimum a good idea?
- Usually no, unless cash flow is very tight. Minimum payments can keep the card active, but the balance may fall slowly and the total interest cost can become very high.
- Why doesn’t this match my bank app or statement exactly?
- Each card issuer has its own rules for day count, posting dates, fees, grace periods, and minimum payment formulas. This calculator is for planning, not a replacement for your official statement.
- Does the minimum payment mostly cover interest or principal?
- For high balances or high APR, a large part of the minimum payment may go to interest first. That is why paying only the minimum often reduces the principal much more slowly than people expect.
- When should I compare credit card debt with a personal loan?
- If you expect to carry the balance for many months, compare the card cost with a personal loan or debt-consolidation loan. A lower-rate loan may reduce total interest, but you should also check fees and repayment discipline.