The practical costs of not separating are ordinary rather than dramatic. You answer work calls at every hour because there is no way to distinguish them. You cannot hand the line to somebody else without handing over your phone. Your personal number appears in a public business listing where it will be scraped and called by every service selling to small businesses. And if you ever sell the business or bring in a partner, the phone number that customers know is attached to you personally.

The setup is straightforward and inexpensive. A second number through a virtual provider rings on your existing phone, keeps a separate voicemail with a business greeting, and can be silenced outside working hours without silencing your family. Most offer text as well, which matters more than it used to, since a meaningful share of customers now prefer messaging over calling.

Choose one that lets you keep the number if you leave the provider, which is called porting and is a legal right in most cases but is easier with some providers than others. Ask before you commit, because a number you cannot take with you recreates the problem you were solving.

Then use it consistently everywhere. The number on your website, your listings, your invoices, and your signage should be identical, because consistency across sources is a signal search engines use, and mixed numbers weaken it.

Decide what happens when you do not answer, because that is most calls. A voicemail greeting that names the business, states when you return calls, and offers an alternative such as text or a booking link converts a missed call into a lead rather than a dead end. Missed calls are among the most expensive silent losses a local business has, and the fix is a recording and a habit rather than a system. If you can enable text messaging on the number, do, because a meaningful share of people will message rather than leave a voicemail.

Check that the number can be ported away before committing to a provider, since a number printed on signage and listed in directories that cannot leave with you recreates exactly the problem you were solving. Porting is generally a right and it is easier with some providers than others, and asking before signing up costs nothing.