The length of a marriage can have an important effect on California spousal support, particularly when the marriage qualifies as one of “long duration.” A common misconception is that a marriage lasting 10 years automatically creates lifetime alimony. California law does not establish that rule. Instead, a long-duration marriage can affect how long the family court retains authority to make future spousal support orders.

Ten Years Creates a Presumption of a Long-Duration Marriage

For purposes of California spousal support, there is a rebuttable presumption that a marriage lasting 10 years or more is a marriage of long duration.

Marriage duration is generally measured from the date of marriage to the date of separation.

The 10-year point is not an absolute dividing line. A marriage lasting less than 10 years can still be found to be a marriage of long duration depending on the circumstances.

The significance of a long-duration marriage primarily concerns the court’s continuing jurisdiction over spousal support.

In a qualifying long-duration marriage, the family court generally retains jurisdiction indefinitely unless the parties agree otherwise in writing or the court terminates support jurisdiction.

Retaining jurisdiction means the court preserves its legal authority to address spousal support in the future. It does not mean that support must actually be paid forever—or even that support must currently be ordered.

Indefinite Jurisdiction Is Not the Same as Lifetime Support

This distinction is one of the most important aspects of California long-term spousal support.

A family court can retain jurisdiction while setting current spousal support at zero. Doing so preserves the possibility that support could be considered later if circumstances justify it and the court continues to have jurisdiction.

Likewise, an existing support order in a long-duration marriage can potentially be modified or terminated in a later proceeding when the applicable legal requirements are satisfied.

The fact that the marriage lasted more than 10 years does not prevent the court from eventually terminating support.

California law expressly recognizes that continuing jurisdiction over a long-duration marriage does not eliminate the court’s authority to terminate spousal support in a later proceeding based on changed circumstances.

Long-term support decisions also require consideration of the factors applicable to postjudgment spousal support rather than simply applying the type of guideline formula often used for temporary support.

The Language of the Judgment Can Be Critical

Spousal support judgments and marital settlement agreements should be read carefully because their terms can significantly affect future modification.

Spouses have substantial flexibility when reaching agreements concerning support. Depending on the terms, they may agree to limit the court’s ability to modify support or establish circumstances under which support will terminate.

A court can also terminate its jurisdiction over future spousal support in appropriate circumstances.

Once jurisdiction has actually terminated, the court generally cannot later revive it and enter a new spousal support order.

This makes the distinction between terminating current support payments and terminating the court’s jurisdiction particularly important.

Support also generally terminates upon the death of either party or the supported party’s remarriage unless the spouses have a qualifying written agreement providing otherwise.

A Long Marriage Does Not Automatically Mean Permanent Alimony

California’s rules for long-duration marriages preserve the family court’s ability to address future spousal support when appropriate, but they do not guarantee lifetime payments. A marriage of 10 years or more is presumptively one of long duration, and even some shorter marriages can qualify. The practical effect depends on the support order, whether jurisdiction has been retained or terminated, subsequent changes in circumstances, and the terms of any enforceable spousal support agreement.