ROI or return on investment is calculated based on how much you spent on your dental office SEO campaign versus how successful the campaign was. It’s the difference between your dental SEO cost and new revenue generated. You must calculate your company financials after carefully mapping out your marketing campaign in order to expect a decent return on your investment. You should get more revenue out of your dental office SEO campaign than what you spent on it in total. However, you should have realistic expectations that are relative to the size of your business, a small or mid-sized business will not have the same increase in clientele as a large business. You should expect a significant ROI that matches the size of your business.