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Cash Advance Interest Calculator
A cash advance is not the same product as a regular purchase, and the math behind it is different in a way that catches a lot of people off guard. Enter the amount you're withdrawing, the fee your card charges, and the cash advance APR, and this calculator shows the true starting balance (amount plus fee) and how much interest accrues per day starting immediately, since cash advances skip the grace period purchases normally get. Add your planned monthly payment and it works out your full payoff timeline and total interest cost.
Why a cash advance costs more than it looks like it should
Three things separate a cash advance from a normal purchase, and all three raise the real cost:
- No grace period: interest starts accruing the moment you withdraw the cash, not after your next statement is due. Even paying it off before your statement closes won't avoid interest the way paying a purchase in full does.
- A separate, usually higher APR: many issuers apply a cash advance APR several points above their standard purchase APR, and it is common for this rate to have no introductory 0% period even on cards that offer one for purchases.
- An upfront cash advance fee: typically a percentage of the amount withdrawn (often around 3 to 5%), sometimes with a flat minimum dollar fee, charged immediately and added to the balance that then itself accrues interest.
Worked example
Withdraw $500 with a 5% cash advance fee and a 29.99% cash advance APR: the fee is $25, so your starting balance is $525 before a single day of interest is charged. At that APR, interest starts accruing at roughly $0.43 per day from day one. Pay $100 a month and it takes about 6 months to clear, with total interest of roughly $45, on top of the $25 fee already paid upfront, for a total cost of about $70 to access $500 in cash.
ATM fees are usually separate too
The cash advance fee your card issuer charges is often not the only fee involved. If you use an ATM to withdraw the cash, the ATM operator may charge its own fee on top, separate from and in addition to your card issuer's cash advance fee. This calculator only accounts for the card issuer's cash advance fee (the percentage field above), since ATM fees vary by machine and are not part of your card agreement's interest calculation, but it's worth checking your receipt for a second, separate charge.
When a cash advance might still make sense
Given the fee and immediate interest accrual, a cash advance is rarely the cheapest way to get cash, but there are situations where the alternatives are worse: an emergency with no other credit available, a merchant that only accepts cash, or a short timeframe where you're confident you can repay within days rather than months (which limits the interest, though not the upfront fee). Comparing the total cost above against a personal loan, a line of credit, or simply the interest on a regular purchase using the main credit card interest calculator is worth doing before treating a cash advance as the default option.
If you end up paying it off slowly
A cash advance balance you can only chip away at behaves the same, mathematically, as any other card balance once the fee is folded in: the same minimum-payment mechanics apply. See the minimum payment calculator to understand how issuers calculate that minimum and how long paying only the minimum would actually take on this balance. Your privacy is handled the same way here too: nothing you enter above leaves your browser, see the privacy policy for details.
Frequently asked questions
Does paying off a cash advance before my statement closes avoid interest?
Is a balance transfer the same as a cash advance?
Why is my cash advance fee sometimes a flat dollar amount instead of a percentage?
Does a cash advance affect my credit score differently than a purchase?
Carrying a regular balance instead of a cash advance?
See this month's interest charge and your full payoff timeline.
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