The terms ‘sign up bonus’ and ‘ first purchase bonus’ are often used interchangeably. In fact, there is a difference. A very small number of cards will give you the sign up bonus as soon as your account is approved — no spending required — and this is a true ‘sign up bonus’. But for most cards, the sign up bonus is in fact a ‘first purchase bonus’; that is, you will be required to fulfil certain spending conditions (e.g. make $3,000 worth of purchases in the first three months of holding the card) before you can receive the bonus.