While extra expense and business income insurance are similar, considering they protect your business in the aftermath of a loss, each covers a unique set of losses. If your property needs repairs, business income insurance covers the lost wages you would normally receive if the business was functioning properly. Extra expense coverage covers the amount of money you spend outside your budget to help maintain business operations. If your business continues to function due to the support of business income insurance, it's possible that purchasing extra expense coverage isn't necessary. However, the extra layer of protection may benefit your business if a disaster occurs when your services are in high demand.