A number of variables will determine the actual cost of snap-in dentures. However, a lower overdenture will start at around the $6,000 USD range, and upper snap in dentures cost from $12,000 USD and up. The difference in pricing is attributed to the fact that more implants are required for the upper overdenture as the bone is softer. Full mouth upper and lower overdentures should cost less than $20,000 USD.