Bank of America's Business Advantage Unlimited Cash Rewards card has been on a bit of a rollercoaster lately with its sign-up bonus. It seems like every few weeks, the bonus changes! Originally launched with a $300 bonus after spending $3,000 in 90 days, it briefly jumped to $500 (with a $5,000 spending requirement), then dropped back down to $300, and now it's back up to $500 again as of January 12, 2026. Why does this matter to you? If you're in the market for a no-annual-fee business card that earns a simple 1.5% cash back on everything, timing is everything! Keep an eye on the bonus before you apply to make sure you're getting the best possible deal. Also, if you're a Bank of America Business Preferred Rewards client, you can earn up to 2.62% cash back, which is a great perk. Be sure to check the latest offers before you apply, as these things can change quickly!