Barclaycard is offering a limited-time signup bonus of $300 on the Upromise Mastercard after spending $1,000 in the first 90 days. This is a notable bump from previous offers, making it a great opportunity to pad your college savings (or just pocket the cash!). The card itself has no annual fee and no foreign transaction fees, which is always a plus for travelers. The Upromise Mastercard earns 1.25% to 1.529% cash back on purchases, depending on whether you link it to an eligible 529 college savings plan. It also has a "Round Up" feature, which lets you round up your purchases to the nearest dollar and convert the difference into cash back rewards. Plus, you can snag up to $250 in bonus cash by using the card at Mygiftcardsplus.com. Why should you care? If you're already saving for college, or even thinking about it, this is an easy way to get a quick $300 head start. Even if college isn't on your radar, a no-fee card with a $300 bonus and a decent cash back rate is worth considering for everyday spending! Just remember to pay your balance in full each month to avoid interest charges.