Update: Some offers mentioned below are no longer available. View the current offers here.Since American Express only lets you earn the bonus on each of its credit cards once per lifetime, it’s important to time your applications carefully and apply when the bonus is at its highest. We’ve seen 100,000-point welcome offers on several flavors of the The Platinum Card® from American Express in the past. However, it’s currently possible to receive a 100,000-point welcome offer on The Business Platinum Card® from American Express via referral.This is a limited-time offer that is only available until September 25, 2019, and the bonus is split into two tiers. Under this offer new applicants will receive 50,000 Membership Rewards points after spending $10,000 in the first three months, and an additional 50,000 points after spending an additional $15,000 (or $25,000 total) in the first 3 months. Meanwhile, the referrer will receive 20,000 Membership Rewards points.Based on TPG’s valuation of Membership Rewards points at 2 cents each, this welcome offer is worth an incredible $2,000 if you’re able to max out both tiers. Of course $25,000 is a lot of money to spend in three months, but for large, established businesses, or those with high expenses for inventory, suppliers, etc, this offer is well within reach. If you don’t think you can spend this much you could also consider applying for the public offer for the Business Platinum which offers up to 75,000 Membership Rewards points, 50,000 after spending $10,000 and an additional 25,000 after spending $20,000 total in the first 3 months.The Business Platinum card is now one of the most expensive publicly available credit cards with an annual fee of $595 (see rates and fees) that’s mostly offset by a $200 annual airline incidental fee credit and a $200 annual Dell technology statement credit ($100 every six months). The card also comes with all the standard perks of the Platinum family, including access to Amex Centurion lounges, automatic Marriott and Hilton Gold elite status, and 5x points on airfare and prepaid hotels booked through amextravel.com. The Business Platinum is also unique in that it offers a 35% pay-with-points rebate, eligible on all premium cabin flights and economy flights with your selected airline. You need to have the full number of points in your account to use this benefit, but this raises your effective redemption value to ~1.54 cents per point.For more on The Business Platinum Card, please see: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.Credit Card Review: The Business Platinum Card From American ExpressAmex Business Platinum Adding WeWork Access and Dell Statement Credits, Raising Fee to $5958 Things To Do When You Get the American Express Business Platinum CardFor rates and fees of the Amex Business Platinum card, please click here.