Three costs stack at once — fee, higher APR, no grace period
A cash advance fee is commonly a percentage of the amount, with a minimum — charged the moment you take the cash.
Cash advances usually carry a separate APR, often several points above your purchase APR.
Interest typically starts on the day of the advance — unlike purchases, there is generally no interest-free window.
Hypothetical example: a 5% fee ($25) + 30 days at 29.99% APR (about $12.32) + a $10 ATM surcharge = about $47.32 — roughly 9.5% for one month.
With a hypothetical $10 minimum fee, withdrawing just $100 means the fee alone is 10% of what you borrowed — before any interest.
A $500 purchase paid in full within its grace period typically costs no fee and no interest. The gap is the cash advance pricing.