RoundUp. Each time you make a purchase with your Jolt Mastercard® Debit Card, the purchase will be rounded up to the nearest whole dollar amount and the difference will be transferred to the Jolt savings account of your choice. **Funds must be available in your checking account for the transfer to take place. All debit cards on your account will be enrolled in RoundUp. You can turn off RoundUp at any time by contacting Jolt.