Labor. Tile installation companies include the majority of their costs -- and profit -- in a tile floor labor figure. Companies charge between three$3 and $6 a square foot for kitchen tile.Material choice, extra design details and your region's average pricing determine labor costs.dditional Costs and Tips. If you need to make a lot of cuts for your kitchen floor, a wet tile saw is an absolute necessity. Check your local home improvement store for wet tile saw rental rates. Save up to $1 per square foot by sealing the tile and grout yourself. Use a tile-specific penetrating sealer.