Sign up for the Chase Ink Cash Business Card and get a $300 cash bonus when you spend $3,000 in 3 months. This is a special offer to celebrate Small Business Week; we've previously only seen a $200 bonus! You also get 5% cash back on your first $25,000 in business purchases (like office supplies, wireless, phone, etc), 2% back on your first $25,000 spent on gas stations and restaurants, and 1% on everything else. Even better, there's a 0% intro APR for 12 months and no annual fee. Note #1: Ink is a business card that can be used by individuals, like sole proprietors or Ebay sellers. Simply select "sole proprietor" for "type of business" and then enter your name as the legal name and social security number as the Tax ID number.Note #2: See our ranking of the top 5 credit card signup bonuses for additional options.