California Family Code Section 2640 gives a divorcing spouse the right to recover separate property funds they put toward buying or improving community property, or toward property owned separately by the other spouse. The reimbursement is dollar-for-dollar, with no interest and no share of any appreciation, and it cannot exceed the property’s net value at the time of division. The right applies automatically unless the contributing spouse gave it up in writing.1California Legislative Information. California Code FAM 2640 – Property Reimbursement Rights
What Contributions Qualify
Section 2640 defines reimbursable contributions narrowly. Only three categories count: down payments, payments for improvements, and payments that reduce the principal balance on a loan used to acquire or improve the property.1California Legislative Information. California Code FAM 2640 – Property Reimbursement Rights For a mortgage payment, only the portion applied to principal qualifies. Interest does not.
The statute also excludes payments for maintenance, insurance, and property taxes. Those costs keep a property running but don’t build equity. So if you used $50,000 of inheritance money for a down payment on the family home and later spent $5,000 of separate funds on property taxes, only the $50,000 is a Section 2640 contribution.
Contributions to Community Property
Section 2640(b) is the core rule. When the court divides community property, the spouse who contributed traceable separate funds is reimbursed first, off the top, before the community share is split.
Take a family home worth $800,000 with a $400,000 mortgage. That leaves $400,000 of equity. If you can trace a $100,000 separate property down payment, you get that $100,000 back before anything is divided. The remaining $300,000 is community equity and gets split evenly, giving you $150,000 of the community share on top of your reimbursement.1California Legislative Information. California Code FAM 2640 – Property Reimbursement Rights
Contributions to Your Spouse’s Separate Property
Section 2640(c) covers a scenario people often miss. If you used your own separate funds to help acquire or improve property that belongs entirely to your spouse, you still have a reimbursement claim, even though the property itself isn’t divided in the divorce.
Say your spouse owned a rental building before the marriage and you used an inheritance to pay down its mortgage. The building stays your spouse’s separate property, but the traceable amount you contributed is reimbursable to you at divorce.1California Legislative Information. California Code FAM 2640 – Property Reimbursement Rights Two things can defeat that right: a valid transmutation under Family Code Section 852, or a written waiver. Without one of those documents, the claim stands.
How the Reimbursement Is Calculated
The math is deliberately simple, and sometimes it feels harsh. You get back the dollar amount you put in. Nothing more. No interest accrues, no matter how many years passed between the contribution and the divorce, and there’s no adjustment for inflation or appreciation. A $75,000 down payment made in 2005 is a $75,000 reimbursement in 2026, even though the money would buy far less today.
Reimbursement is also capped at the net value of the property when it’s divided. If the mortgage exceeds the market value, there’s no equity to pay from, and the practical recovery is zero even though the right exists on paper. Where equity exists but falls short of your contribution, you receive only what equity is available. The cap applies to both community property claims under subsection (b) and separate property claims under subsection (c).1California Legislative Information. California Code FAM 2640 – Property Reimbursement Rights
Tracing the Money Back to a Separate Source
The whole right depends on your ability to trace the funds to a separate property source. Under California law, separate property includes anything you owned before marriage, anything received during marriage by gift or inheritance, and income from those assets.2California Legislative Information. California Code FAM 770 – Separate Property of Married Person Tracing sounds simple until separate and community funds land in the same account.
California courts recognize two approaches. Direct tracing requires contemporaneous records showing that identifiable separate funds were in the account when a specific purchase or payment was made. Bank statements, deposit slips, and transaction histories that tie a particular inheritance deposit to a particular down payment check are the backbone of a direct tracing claim. After-the-fact explanations and general recollections don’t carry the day; courts want records made at or near the time of the transactions.
The exhaustion method works the other direction. If you can prove that all community income during a given period was consumed by ordinary family living expenses, whatever remained in the account must have been separate property. It requires a careful accounting of income and expenses across the relevant years, which is heavy work but can rescue a claim when commingling makes direct tracing impossible.
The burden sits entirely on the spouse seeking reimbursement. Courts won’t reconstruct the paper trail for you, and accounts where funds have flowed together for years can make tracing extremely difficult. Keeping separate property in a dedicated account from the start of a marriage avoids the problem before it starts.
Waivers and Transmutations That End the Right
Section 2640(b) lets a spouse waive reimbursement in writing. Prenuptial and postnuptial agreements are the usual vehicles. A clause stating that separate property contributions to community assets will not be reimbursed at divorce will be enforced.
The statute also recognizes a “writing that has the effect of a waiver,” so the document doesn’t need to be labeled a waiver of reimbursement. A signed agreement that effectively converts a separate contribution into a community gift can qualify. The intent to give up the right still has to be clear on the face of the writing. A vague document that only allocates debt responsibility for a property, and never addresses funds already contributed, may not be enough to extinguish the claim.
For contributions to the other spouse’s separate property under subsection (c), a transmutation under Family Code 852 also defeats the claim. A transmutation requires a signed, express written declaration by the spouse whose interest is being changed.3California Legislative Information. California Code FAM 852 – Transmutation of Property Simply adding your name to your spouse’s title, without that written declaration, does not create a transmutation and does not, on its own, eliminate your reimbursement right.
Where Section 2640 Fits in the Division of Property
California divides the community estate equally between spouses. Section 2640 reimbursements come out before the equal split. The court identifies the community property, subtracts valid Section 2640 claims, and then divides what remains fifty-fifty. Because the reimbursement comes off the top, a substantial separate property contribution can meaningfully shift the total financial result of a divorce even though the community itself is still split evenly.
One boundary matters. Section 2640 does not give the contributing spouse a share of appreciation. If you contributed $100,000 of separate money toward a home that later doubled in value, the reimbursement is still $100,000, and all of the appreciation belongs to the community and is divided equally. The statute also doesn’t reach separate property that a spouse simply held on their own without contributing it to community or other-spouse property. Those assets are confirmed as separate under the ordinary rules and are not divided at all.