The cost of dental insurance varies widely based the type of plan (DHMO or PPO), the coverage provided (for example, preventive only vs. comprehensive), and whether it’s group or private dental insurance. Also, the cost of dental insurance may be higher in major metropolitan areas. In general, for an individual, basic dental insurance is roughly $30+ a month ($360+ annually), a mid-range plan is $50+ a month ($600+) on average, and comprehensive coverage is $70+ a month ($850+). Family plans can exceed $100 a month ($1,200).