Update: Some offers mentioned below are no longer available – View the current offers hereChase Sapphire Preferred Cardholders: Refer A Friend HereEven though it’s been somewhat overshadowed by the more premium (and, naturally, more expensive) Chase Sapphire Reserve, the Chase Sapphire Preferred Card remains a great option for earning Ultimate Rewards points and enjoying some solid travel protections like primary car rental insurance.The Sapphire Preferred’s sign-up bonus is as follows: 50,000 bonus points after you spend $4,000 on purchases in the first three months from account opening. That’s $625 in travel when you redeem through Chase Ultimate Rewards. Based on TPG’s valuations, those 50,000 Ultimate Rewards points are worth $1,100, and thanks to the UR program’s strong selection of transfer partners, you can redeem them for flights with several carriers or for a hotel stay with Hyatt, IHG, Marriott or Ritz-Carlton.While 50,000 Ultimate Rewards points is enough to unlock two round-trip flights to Hawaii (booked through Korean Air’s SkyPass program) among other great redemptions, perhaps you have a more expensive award in mind. In addition to maximize the Sapphire Preferred’s 2x dining and travel category to earn extra points, you can boost your account balance by referring your friends and family to the card.How It WorksChase’s Refer-A-Friend program rewards you for essentially recruiting new sign-ups for its cards. If you’re a current Chase cardholder, head to the program’s website, enter your last name, ZIP code and the last four digits of the card you’d like to refer people to, and Chase will display your current offer. You can then share a personal referral link with your friends and family, or you can enter their emails to have Chase send them a message. Alternatively, you could share your referral link on Twitter.Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.For the Sapphire Preferred, you can earn up to 50,000 bonus Ultimate Rewards points per year — 10,000 points per friend you refer, so you’re capped at five referrals per year. Note that you’ll only receive the bonus points if the friend you refer is approved for the card; simply sending them a referral link isn’t enough. If your friend is approved, he or she will also have the opportunity to earn 50,000 points — by spending $4,000 in the first three months.Bottom LineEspecially if you have friends and family who are interested in getting into the award travel game, referral bonuses are a great way to introduce them to a travel rewards card while boosting your own points or miles balance. In the case of the Chase Sapphire Preferred, this can be especially lucrative, since you can earn up to 50,000 Ultimate Rewards points per year through referrals. If you need some inspiration for how to use those extra points, check out this post on the 10 best ways to use 100,000 Ultimate Rewards points.Have you used Chase’s Refer-A-Friend program to earn extra points with the Chase Sapphire Preferred?