Actually, I suspect that gives FAR more to the wife than she has a right to. Without even getting into the calculation, most of the mortgage payment at this time is going to be interest and only the amount the community property paid that reduced the amount owed would be a part of the calculation of how much ownership the community has gained over the separate property. Principal reduction is the key. The ratio of principal reduction (due to community property) to the purchase price is the community's portion of appreciation plus the principal reduction (due to community property) is the amount the community deserves for the amount paid. In a divorce, divide that by two.