How Much Does It Cost To Adopt My Grandchild?

How Much Does It Cost To Adopt My Grandchild? To reiterate, the details of grandparents taking custody of a grandchild will vary from state to state. This includes how much it will cost to adopt the grandchild. On average, independent adoption costs between $8,000 and $40,000. Grandparents should expect to pay around $10,000 to $15,000.