Generally, SEO is free. Search engines such as Google won’t charge website owners (and business owners) for displaying their links on result pages. In fact, that’s the primary purpose of search engines, helping users find what they’re looking for.
While search engines will obviously accept your website for free, the actual SEO process is a professional task that should be carried out by someone with knowledge and experience. At this point, despite the free profile of search engines, SEO services come with a premium.
A consultant can help you become a top result while avoiding penalties and common SEO mistakes.