When you take out a cash advance, you typically have to pay it back within a few weeks. This means you must have the money available when your loan comes due. If you can’t repay the loan on time, you may incur late fees and penalties. You can generally pay back cash advances in a lump sum when you get your next paycheck or in installments over several weeks. There are a few ways to pay back a cash advance, including: Write a check for the total amount Set up automatic payments from your bank account Pay back the loan with a debit or credit card Extend the repayment period (though this usually results in higher interest rates and additional fees)