If you search "Cougar Cash" on the WSU website, it will lead you to the Cougar Cash self-service option. You can add money this way with a debit or credit card. You can also get to this through myWSU.

If you only have cash, you can visit the WSU Cougar Card Center in CUB 60, Monday-Friday 8:00am-5:00pm. There, they have cash-to-card machines.