The amount you need to deposit to receive your bonus when opening a new bookmaker account will vary. ‘Bet £10 Get £30’ - The name of this offer says it all. A bookie will give you extra funds to bet with after your first bet is placed or settled. 200% and 300% First Bet Bonus - A 200% and 300% first bet bonus is a bonus that amounts to two or three times the size of your first bet after signing up to a new betting account. An example would be depositing £10 with the bookie giving you a £20 or £30 free bet.