Competition level of your keywords: If you hire an SEO expert, the first thing he will check is the competition level of your keywords. If the keywords you need for your business are really high in competition then the SEO company has to put more efforts. When there are thousands of companies selling the same service or products, your SEO Services have to be really effective to compete with the existing market-leaders. Thus, it will cost you much than the average level.
Online market value of the product or service you are selling is another factor that determines the cost you pay to your SEO expert. There are two possibilities – 1) the market your product/service is big when the value of your product/service is small and 2) the market of your product/service is small but the value of your product/service is really high.
Another factor that plays vital role in shaping the bill of your SEO company is the market value of the SEO Company. If the SEO services provider is new then they will charge you much less than an experienced and proficient company offering professional SEO services.