US-CaliforniaWhat is a domestic partnership and does it have the same rights as marriage?
A domestic partnership in California is a legally recognized relationship between two adults that grants nearly all the same rights, protections, and responsibilities as marriage under state law.
What the Law Says
California law defines domestic partnership and explicitly equates its legal effect to marriage for purposes of state law.
A domestic partnership is a legal relationship formed when two adults file a Declaration of Domestic Partnership with the California Secretary of State. It is available to same-sex couples and opposite-sex couples where at least one partner is over age 62.
Under the California Domestic Partner Rights and Responsibilities Act of 2003, registered domestic partners have the same rights, protections, and benefits — and are subject to the same responsibilities, obligations, and duties — as married spouses under California law.
This includes rights related to community property, inheritance, conservatorships, healthcare decision-making, insurance coverage, tax treatment (state), and child custody and support — but does not extend to federal benefits like Social Security spousal benefits or federal tax filing status.
Statutory TextDomestic partners shall have the same rights, protections, and benefits, and shall be subject to the same responsibilities, obligations, and duties under law, including, but not limited to, taxation law, as are granted to and imposed upon spouses.
— Family Code § 297.5(a) — Rights and responsibilities of domestic partners
Statutory TextA 'domestic partnership' means a relationship between two individuals who meet the requirements of Section 297 and who have filed a Declaration of Domestic Partnership...
— Family Code § 297(a) — Definition
What Courts Have Said
California courts have consistently affirmed that domestic partners are entitled to equal treatment under state law.
The court held that domestic partners must be treated identically to married spouses in probate matters, including intestate succession and spousal property claims.
While primarily addressing same-sex marriage, the court confirmed that domestic partnerships were created to provide 'all of the substantive legal benefits and responsibilities of marriage' under state law — though acknowledged they do not satisfy the constitutional requirement for marriage equality.
What to Do
Both partners must meet eligibility requirements: same-sex or opposite-sex with at least one aged 62+; neither married or in another partnership; not closely related.
Complete and file a Declaration of Domestic Partnership (Form NP/SF DP-1) with the California Secretary of State, along with the $33 fee.
Keep certified copies of the filed declaration — it serves as proof of partnership for hospitals, employers, and government agencies.
Update estate planning documents (wills, powers of attorney) and beneficiary designations to reflect your domestic partnership status.
Note: Federal rights (e.g., immigration, Social Security, federal taxes) are not available to domestic partners — only marriage confers those.
Sources
Not legal advice. This article is general information based on publicly available sources, written for educational purposes. Laws change and individual situations vary. Consult a licensed attorney in your jurisdiction before acting on anything you read here. Last reviewed: 2026-06-08.