Possibly, though usually less than borrowing does. Opening a business account often involves a credit search, and accounts with an overdraft or other credit facility are typically reported to credit reference agencies. A straightforward switch matters less than a new debt, but it is not always invisible, and treatment varies between banks.
The Current Account Switch Service moves UK current accounts, including many business accounts, transferring payments and redirecting incoming credits to the new provider. It is a mechanism, not an approval: the new bank still runs its own checks and decides whether to open the account, so a switch is not guaranteed to complete. Ask your intended provider what checks it runs and whether your business type is eligible.
The more practical issue for finance applications is your statement history. Lenders usually want to see recent consecutive months of trading through the account. Switching immediately before you apply can leave the picture thin or split across two banks at exactly the wrong moment, which slows a case down even when the underlying business is sound.
If a switch closes an existing facility, be deliberate about it. Any overdraft you rely on has to be replaced rather than assumed, and the payment history attached to the old facility will eventually age out of view. Where finance is on the horizon, it is usually worth sequencing the two decisions rather than doing both at once. We are happy to talk through the timing before you commit — any lending decision, of course, remains with the lender.