BIS
Picture this: you are sitting at 5/24 with Chase and a targeted mailer arrives for the Ink Business Preferred. Because that card is a business product, approving it will not add another slot to your 5/24 count. You can accept the offer, earn the welcome bonus, and leave your personal card slots untouched for a future Sapphire application. That is the practical power of a BIS card in a point-collector's strategy.
A common source of confusion is assuming "business card" requires a registered LLC, an EIN, or years of operating history. It does not. Most major issuers, including Chase, Amex, Citi, and Capital One, will approve a sole proprietorship application using your Social Security Number as the tax ID. Side income from freelance work, rideshare driving, or reselling on eBay qualifies as a business for application purposes. Separately, some collectors conflate BIS cards with small-business cards that do report to personal bureaus, which is a different and important distinction. Cards from certain issuers (notably Capital One) do report business card activity to personal credit bureaus, which means they can affect your utilization and indirectly influence future approvals even if they do not count toward 5/24.
The mechanics work like this: business cards from Chase, Amex, and Citi typically appear only on commercial credit reports, not on Equifax, Experian, or TransUnion personal files. Because Chase's 5/24 rule counts only personal inquiries and new personal accounts visible on those personal files, a Chase Ink card opened last month is invisible to the rule. Amex's once-per-lifetime bonus rule applies separately to each card product regardless of business or personal designation, so that is a different variable to track. There is no universal cap on how many business cards you can hold across issuers, though each issuer applies its own internal review of total credit exposure and velocity.
The practical takeaway: if you have reached a personal card limit with any major issuer, check whether a BIS version of your target product exists before assuming you are out of options.