FREE MOORE-MARSDEN COMMUNITY PROPERTY CALCULATOR

How Is It Calculated?

The free Moore–Marsden calculator follows the same logic California courts use when they apply the Moore–Marsden doctrine:

• Total mortgage principal paid during the marriage
• Total mortgage principal paid before marriage (separate property)
• Proportion of payments during marriage relative to the whole

Here’s the math in plain terms:

1. 1. Calculate what percentage of total mortgage payments occurred on your home during the marriage
   2. That percentage represents your community property share of the home's equity
   3. This isn’t your final settlement—it’s what the law might say if you did nothing to fight for your half.

“What If” Scenarios

Numbers change stories. Use the calculator to test real-life scenarios:

• What if one spouse paid most of the mortgage before marriage?
• What if there's a big spike in payments during the marriage?
• What if refinances or principal-only payments shift the balance?
• What if one spouse contributed separate funds toward mortgage principal?

Pushing the numbers around gives you clarity—and grounds for negotiation.

Why This Matters

Home ownership is often tied to security—and equity disputes can keep you up at night. Knowing your community property share strengthens your position. It’s the first move in protecting your financial future.

Our calculator doesn’t replace legal counsel—it gives you the ballpark you need before walking into mediation or court.

How to Use It, Now

1. Enter your home’s total mortgage principal (from origination to today).
2. Enter the portion paid during the marriage.
3. View your community property percentage and estimated equity share.

Once you’ve got the figure, bring it to an attorney who knows how to reinforce your claim, even if the numbers suggest otherwise.