How the comparison works
Enter the price, your current savings and your usual monthly expenses, then the terms of each way to pay. For each option the calculator shows the total you would pay, how much of that is interest and fees, how long it takes to pay off, the monthly payment, and how many months of expenses your savings would cover right after.
Cheapest is not always safest
Paying cash avoids interest, but if it empties your savings, the next surprise bill may end up on a high-interest card anyway. The calculator warns you when paying cash would leave less than three months of expenses saved.
A 0% installment plan can keep your savings intact at no extra cost, but only if every payment is made on time. Some promotional offers charge all the deferred interest if the balance is not cleared by the deadline, so read the terms.
- Credit card: the most expensive way to spread a cost if you carry the balance for months.
- Installment plan: predictable payments; check the APR and any setup fee.
- Buy now, pay later: usually interest-free when paid on time, but late fees add up and several plans at once are easy to lose track of.
Frequently asked questions
Is it better to pay cash or use a credit card for a big purchase?
If you can pay cash and still keep an emergency cushion, cash is usually cheapest. Carrying the purchase on a credit card for months typically costs the most because of the interest rate. Enter your numbers above to see the difference in total cost.
Is buy now, pay later a good idea?
It can be interest-free if every payment is on time, which makes it cheaper than a credit card balance. The risks are late fees and losing track of several plans at once. It works best for purchases you could afford to pay for in cash anyway.
How much does it really cost to pay off a purchase on a credit card?
It depends on the APR and how much you pay each month. The calculator shows the total paid, the interest, and how many months it takes. If your monthly payment does not cover the interest, the balance never goes down.
How much savings should I keep after a big purchase?
A common rule of thumb is three to six months of essential expenses as an emergency fund. The calculator shows how many months your savings would cover after each option.