Zero-percent balance transfer offers have been fairly common on consumer credit cards in recent years, but not so much on cards designed for small-business operators and other entrepreneurs. With most business credit cards, if you can transfer a balance at all, you'll be paying the card's ongoing interest rate, in addition to a transfer fee that typically ranges from 3% to 5% of the amount transferred.
A handful of small-business cards have offered an introductory 0% period on transfers, but most of those cards dropped their balance-transfer offers in 2020. Examples include the American Express Blue Business Cash™ Card and the The Blue Business® Plus Credit Card from American Express.
One notable exception is the U.S. Bank Business Platinum. That card is not currently available on NerdWallet, but you can apply for it through the issuer's website.