Find out whether paying in installments or lump sum is better for you
The installment fee is generally calculated as: Principal × Annual Rate × Months / 12. For example, paying 1,000,000 KRW over 6 months at 13.5%/year results in a fee of approximately 67,500 KRW. Actual calculation methods may vary by card issuer.
An interest-free installment is a promotion where the card issuer covers the installment fee, so you only repay the principal. Typically offered for 2–12 months at select merchants or during promotional periods. Any remaining balance after the interest-free period may still incur fees.
It depends on the situation. Interest-free installments are generally better if no lump sum discount is available. However, if lump sum offers a high cashback or discount, it may be more beneficial. Use this calculator to compare your specific numbers.
A partial interest-free installment applies no fee for a portion of the installment period (e.g., 3 of 12 months), with fees applying to the remaining balance. Enter the 'Interest-Free Months' in this calculator to account for partial promotions.
Check the card issuer's official website, the back of your card, or the card issuer's app. Additional cashback may apply at specific merchants — check event pages for promotions.
Cancelling an installment reverses the remaining balance, and fees already paid are typically refunded. However, some card issuers may not support partial cancellations — check your card's policy before purchasing.
The annual rate (APR) is the yearly fee percentage; the monthly rate is APR divided by 12. Card issuers typically advertise APR, and this calculator uses APR as the basis. For example, 12%/year equals approximately 1%/month.
If you're unsure whether installment or lump sum payment is more advantageous, this comparison tool calculates the exact cost difference for you.
Card installments let you spread large payments over several months for better cash flow, but you pay installment fees in return. Fees typically range from 10-20% annually, and the longer the installment period, the greater the total fee burden.
Installment fee rates differ between card issuers, and even the same card may have different rates depending on the merchant type. Therefore, always check your card issuer's official fee rates before using installments.
Interest-free installments are benefits where the card issuer or merchant absorbs the fees, so consumers only pay the principal in installments. Most card issuers offer 2-3 month interest-free plans year-round, with 6-12 month interest-free offers during special promotions. When interest-free installments are available, they're much more advantageous than lump sum payments.
However, canceling a payment or closing the card during an interest-free installment may result in the remaining balance being charged as a lump sum. Also, if there are remaining installments after the interest-free period, standard fees will apply for that period.
Lump sum payments have no installment fees, resulting in lower total expenditure. Some cards offer additional point rewards or billing discounts for lump sum payments. For example, certain department store cards return 5-10% of the purchase amount as points for lump sum payments, making lump sum significantly more advantageous.
On the other hand, lump sum means a large amount is deducted at once, which can strain cash flow. Consider carefully whether you can afford the full card bill next month before choosing your payment method.
Key strategies for smart card payments: First, always take advantage of interest-free installment offers when available. Second, consider lump sum when high point rewards or discounts are offered. Third, longer installment periods reduce monthly burden but increase total fees. Use this calculator to find the optimal payment method for your situation.