Moore Marsden Calculations: Dividing the Family Home in a California Divorce

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Last Modified on Aug 02, 2024

Navigating the division of a family home in a California divorce can be incredibly complex, especially when one spouse purchased the home before the marriage, and both contributed to the mortgage during the marriage.

California family law provides for reimbursement in two scenarios:

  • When separate property is contributed to community (marital) property.
  • When community property is contributed to one spouse’s separate property.

To determine each spouse’s interest in a property like the family home, California courts use the Moore Marsden formula. Named after two landmark cases, this formula helps to divide property acquired by one spouse before marriage.

Calculating the Pro Tanto Interest

The community’s pro tanto share of the purchase price is the principal paid with community funds during the marriage, divided by the purchase price. The rest of the purchase price is the purchasing spouse’s separate share. Those shares apply to appreciation during the marriage. Premarital appreciation stays with the purchasing spouse.

Example Calculation

Let’s assume the following values:

  • Purchase price: $200,000, which is a down payment of $40,000 plus an original mortgage of $160,000.
  • Principal paid before marriage: $10,000 (separate).
  • Value at marriage: $250,000.
  • Principal paid during the marriage with community funds: $20,000.
  • Value at division: $350,000.

The community share of the purchase price is $20,000 / $200,000 = 10%. The separate share is 90%.

Appreciation during the marriage is $350,000 − $250,000 = $100,000. Premarital appreciation of $50,000 stays with the purchasing spouse.

The community share of marital appreciation is 10% × $100,000 = $10,000. The separate share is $90,000.

Calculating the Purchasing Spouse’s Actual Interest

The loan at marriage is $150,000. Equity at marriage is $100,000, all separate (down payment $40,000 + premarital principal $10,000 + premarital appreciation $50,000).

Community equity is $20,000 + $10,000 = $30,000. Each spouse’s half is $15,000.

The purchasing spouse’s interest is $100,000 + $90,000 + $15,000 = $205,000.

Calculating the Other Spouse’s Interest

The other spouse’s interest is $15,000.

The loan remaining is $130,000. Equity is $220,000. $205,000 + $15,000 = $220,000.

This is an illustration; reimbursements, credits, and a different title history can change it; it is not a calculation for a reader’s own house.

Importance of Accurate Valuation

To perform a precise Moore Marsden calculation, knowing the property’s value at the date of marriage and at the date of division is crucial. This often requires assistance from a historical appraisal specialist.

Seeking Professional Assistance

Dividing real estate in a California divorce is intricate. For help ensuring a fair division of the family home, contact Tierney Law Group, P.C. We have extensive experience in guiding clients through the Moore Marsden formula to achieve an equitable share of the marital home.

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