Blue Business Cash from American Express

The Blue Business Cash keeps business rewards simple: 2% cash back on all purchases with no annual fee and no categories to track. American Express recently doubled the welcome bonus from $250 to $500 after $5,000 in spend over three months, which makes now a good time to apply. A 0% intro APR on purchases for 12 months adds some breathing room for a new business. The catch is the cap: the 2% rate applies only to the first $50,000 in purchases each year, then drops to 1%, so heavier spenders will want a different card for anything above that. It also charges a foreign transaction fee, so leave it home when you travel abroad.