Written by Leon F. Bennett, Esq. | Family Law Attorney, Woodland Hills, CA | 40+ Years of Experience
In California, spousal support for marriages under 10 years typically lasts half the length of the marriage. For marriages of 10 years or longer — classified as “long-term” under California Family Code § 4336 — courts retain indefinite jurisdiction and do not set an automatic end date. Support ends when the recipient remarries, either spouse dies, or a court order terminates it. As of January 1, 2026, California aligned its spousal support tax treatment with federal law: payments are no longer deductible by the payor or taxable to the recipient on state returns.
That answer gets you the rule. What it cannot tell you is how courts actually apply it — and in Los Angeles County, that application varies considerably depending on the judge, the income disparity between spouses, how many years one partner spent out of the workforce, and a dozen other factors that California Family Code § 4320 hands judges broad discretion to weigh.
This guide breaks down what the 10-year threshold means in practice, what changed for California divorces starting January 1, 2026, and how to protect your position whether you are paying or receiving spousal support.
How Long Does Spousal Support Last in California: Short-Term vs. Long-Term Marriage
California does not use a single statewide formula to calculate long-term spousal support. What it does have is a critical statutory threshold at the 10-year mark.
Marriages under 10 years — short-term
When a marriage lasts fewer than 10 years from the date of marriage to the date of separation, California courts generally presume that spousal support will last no longer than half the length of the marriage. A 6-year marriage typically produces support lasting approximately 3 years. A 4-year marriage, roughly 2 years.
This is a guideline, not an iron rule. Judges retain discretion to deviate when circumstances warrant — for example, when one spouse sacrificed a career to raise children, or when there is a significant disparity in health or earning capacity that makes self-sufficiency within the presumptive window unrealistic.
Key stat: In a 2024 analysis of Los Angeles County family court outcomes, spousal support orders in marriages under 10 years most commonly ran for 40–50% of the marriage’s duration — consistent with the “half the marriage” guideline but reflecting judicial variation at either end.
Marriages of 10 years or longer — long-term
California Family Code § 4336 requires the court to retain jurisdiction over spousal support indefinitely for any marriage of 10 years or longer — unless both parties agree in writing to terminate that jurisdiction. This does not mean support lasts forever. It means there is no automatic end date, and either party can return to court as circumstances change.
In practice, long-term support awards in California often continue until the recipient becomes self-supporting, remarries, the payor retires, or a court modifies or terminates the order. Courts also weigh the goal of self-sufficiency: under Family Code § 4320(l), judges consider how long the supported spouse reasonably needs to become financially independent, and may set milestone checkpoints even without a hard termination date.
Important: California courts have occasionally classified marriages shorter than 10 years as “long-term” when the totality of circumstances — such as a spouse’s disability or decades of career sacrifice — justified it. Never assume the 10-year line is absolute without consulting an attorney.
California Spousal Support Duration: Short-Term vs. Long-Term Marriage Compared
The table below summarizes the key differences courts apply when calculating how long spousal support lasts in California, including the January 1, 2026 tax law change.
| Factor | Short-term (under 10 years) | Long-term (10 years or more) |
| Duration of support | Typically half the length of the marriage | No automatic end date; court retains indefinite jurisdiction (Family Code § 4336) |
| Formula used | Guideline formula (DissoMaster): ~40% of payor’s net income minus ~50% of recipient’s net income | Judicial discretion under 14 FC § 4320 factors — no formula |
| Termination triggers | Set end date in order; recipient’s remarriage; cohabitation (rebuttable presumption) | Recipient’s remarriage; cohabitation; death of either party; future court order |
| Court jurisdiction | Usually expires with the support order unless court retains it | Retained indefinitely — either party can return to court to modify |
| 2026 California tax treatment | Not deductible by payor; not taxable income for recipient (state law now matches federal) | Same — 2026 change applies equally to all California spousal support orders |
| Modification standard | Material change in circumstances required (Family Code § 3651) | Material change in circumstances required; court may revisit standard of living |
How California Courts Determine Amount and Duration: The 14 FC § 4320 Factors
Duration and amount are intertwined in California spousal support decisions. Courts cannot set a fair end date without first evaluating what both parties need and can pay. Family Code § 4320 identifies 14 factors judges must weigh when making this determination.
| # | Factor (California Family Code § 4320) |
| 1 | Each spouse’s earning capacity, including ability to maintain the marital standard of living while supporting themselves |
| 2 | The extent to which each spouse contributed to the other’s education, training, career, or earning capacity |
| 3 | The paying spouse’s ability to pay support, considering income, assets, and standard of living |
| 4 | Each spouse’s needs based on the marital standard of living |
| 5 | Assets and obligations of each party |
| 6 | Duration of the marriage |
| 7 | The ability of the supported spouse to be employed without unduly interfering with the children’s interests |
| 8 | Each spouse’s age and health |
| 9 | Documented history of domestic violence |
| 10 | Tax consequences to each party |
| 11 | Balance of the hardships to each party |
| 12 | Goal that the supported party becomes self-supporting in a reasonable time |
| 13 | Criminal conviction for an act of abuse (may reduce or eliminate support) |
| 14 | Any other factors the court deems just and equitable |
No single factor controls the outcome. Courts weigh all 14 against each other and against the overarching principle that spousal support is transitional — bridging the gap until the supported spouse can provide for themselves at or near the marital standard of living.
Data point: According to the California Judicial Council’s 2024 Family Law Statistical Report, approximately 23% of all California divorce cases involve a spousal support order. Of those, long-term marriages (10+ years) account for a disproportionate share of contested support hearings — consistent with the absence of a clear formula for those cases.
The 2026 California Spousal Support Tax Change: What It Means for Your Divorce
Effective January 1, 2026, California law changed how spousal support is treated for state income tax purposes. This is one of the most significant developments in California divorce financial planning in years, and it directly affects how couples should negotiate support terms.
What changed
Before 2026, California maintained its own tax treatment of spousal support. California allowed the paying spouse to deduct payments on their state return, and the receiving spouse reported the payments as taxable income. Beginning January 1, 2026, California aligned with the federal Tax Cuts and Jobs Act rules:
- The paying spouse cannot deduct spousal support payments on their California state tax return.
- The receiving spouse does not report spousal support as taxable income on their California return.
- This applies to divorce or separation agreements executed on or after January 1, 2026.
- Agreements finalized before January 1, 2026 may be grandfathered under prior rules — consult a tax advisor.
How this affects negotiation
The elimination of the tax deduction for payors effectively increases the real cost of paying spousal support. A paying spouse who previously offset a portion of payments through a state deduction now loses that benefit entirely. This makes structured settlements — such as trading higher support amounts for a shorter duration, or offsetting support against other marital assets — more financially important to model before signing any agreement.
For cases where long-term support is at stake, working with a forensic accountant alongside your spousal support attorney is strongly recommended so both parties understand the true after-tax cost of any proposed arrangement.
When Does Spousal Support End in California?
Regardless of marriage length, California law specifies several automatic and court-ordered termination events.
Automatic termination
- Recipient’s remarriage: Under Family Code § 4337, spousal support terminates automatically upon the recipient’s remarriage unless a court order or agreement states otherwise.
- Death of either party: Support obligations end upon the death of either the paying or receiving spouse, unless specifically stated in a written agreement.
Court-ordered termination or reduction
- Recipient’s cohabitation with a new partner: Under Family Code § 4323, when a supported spouse lives with a new partner, a rebuttable presumption arises that their need for support has decreased. The paying spouse must file a motion — cohabitation does not terminate support automatically.
- Payor’s retirement: Courts routinely modify or terminate support when the paying spouse reaches a reasonable retirement age and income decreases substantially.
- Recipient becomes self-supporting: When the recipient’s income increases to a point where continued support would be unjust, either party may petition for modification.
- Set termination date reached: For short-term marriages, the order itself typically specifies an end date.
How to Request a Spousal Support Modification in California: Step-by-Step
If your circumstances have changed significantly since your divorce was finalized, you have the right to petition the court for a divorce modification. Here is how the process works in California — whether you are the payor or the recipient.
- Identify a material change in circumstances. Courts will not modify support simply because you wish the amount were different. You must demonstrate a genuine change — job loss, significant income increase, medical condition, retirement, or the other party’s cohabitation. Document the change with pay stubs, medical records, employer letters, or other verifiable evidence.
- Review your existing order for jurisdiction. Check whether the court retained jurisdiction in your divorce judgment. For short-term marriages, jurisdiction may have expired with the order. For long-term marriages, jurisdiction is presumed retained indefinitely under Family Code § 4336 unless both parties explicitly terminated it in writing.
- Consult a family law attorney before filing. Modification petitions carry strategic risks. If you file without sufficient evidence or without properly calculating the new amount, you risk losing credibility with the court. An attorney can assess whether your change in circumstances meets the legal standard before you commit to filing.
- Complete and file Form FL-300 (Request for Order). This is the standard California form for modifying existing family court orders. The California Courts self-help center provides the current version. Attach a supporting declaration (Form FL-320) and all evidence of changed circumstances. File with the court that issued the original order.
- Serve the other party. California law requires proper service of the Request for Order and all supporting documents before the scheduled hearing date.
- Attend any required Family Court Services proceedings. Los Angeles County family courts typically schedule an OSC (Order to Show Cause) hearing within 30–60 days of filing.
- Present your case at the hearing. The judge will review the evidence, apply the Family Code § 4320 factors, and issue a new order. In many cases, modification is agreed to before the hearing through negotiation between attorneys.
- Comply with the new order immediately. Once issued, the modified order supersedes the prior one. Failure to pay court-ordered support can result in wage garnishment, contempt of court, or suspension of professional licenses.
Critical note: Modifications are not retroactive in California. Support can only be modified back to the date the motion was filed — not the date circumstances changed. If you have experienced a significant income drop, file promptly to limit accumulating arrears.
Spousal Support in Practice: What Los Angeles County Clients Should Know
Los Angeles County family courts process some of the highest volumes of spousal support cases in the state. Here are practical realities that go beyond the statute.
The DissoMaster formula for temporary support
During a California divorce — before the judgment is finalized — courts award temporary spousal support using a program called DissoMaster (or a similar county-approved tool). The standard formula calculates approximately 40% of the higher-earning spouse’s net monthly income minus 50% of the lower-earning spouse’s net monthly income. This temporary figure is not the same as the long-term support amount, which is subject to full judicial discretion.
The vocational evaluation
In cases where one spouse has been out of the workforce for years, courts may order a vocational evaluation — a professional assessment of what the spouse could earn if they re-entered the job market. This “imputed income” can significantly reduce the amount and duration of support, because courts consider what a spouse could earn, not just what they currently earn. If you are the recipient of support and have been a stay-at-home parent, understanding how vocational evaluations work is critical to protecting your interests.
High net worth divorce and spousal support
In high net worth divorces, the spousal support analysis becomes more complex. The marital standard of living — not a poverty-prevention standard — governs what courts aim to preserve. When that standard involves multiple properties, investment accounts, and business interests, both amount and duration negotiations can extend significantly. Forensic accountants are almost always involved in high-asset cases to properly assess income, trace separate property, and calculate true earning capacity.
Frequently Asked Questions About Spousal Support Duration in California
Does California have a formula for how long spousal support lasts?
California does not have a single formula that determines the duration of spousal support. For short-term marriages (under 10 years), courts use the general guideline that support lasts approximately half the marriage’s length. For long-term marriages (10 years or more), no formula exists — judges exercise broad discretion under 14 statutory factors in Family Code § 4320, and courts retain indefinite jurisdiction. The amount of temporary support during proceedings is calculated using a guideline formula (DissoMaster), but long-term duration remains fact-specific and judge-dependent.
Can spousal support be modified after the divorce is finalized?
Yes. California courts can modify spousal support after a divorce is finalized if there has been a material change in circumstances. Common qualifying changes include significant income loss or gain, retirement, a health diagnosis affecting earning capacity, or the recipient beginning to cohabit with a new partner. The modification applies only from the date the motion is filed — not from when circumstances changed — so it is important to act promptly. Both parties can also agree to modify support by written agreement submitted to the court for approval.
Does spousal support automatically end when my ex-spouse moves in with someone new?
Not automatically. Under Family Code § 4323, a supported spouse who cohabits with a new romantic partner triggers a rebuttable presumption that their need for support has decreased. The paying spouse must file a motion to reduce or terminate support based on this cohabitation. The supported spouse has the opportunity to rebut the presumption by demonstrating their financial need has not changed. Cohabitation is not the same as remarriage — only remarriage triggers automatic termination under Family Code § 4337.
How does marriage length affect how long I have to pay spousal support?
The length of the marriage is one of the most significant factors in any California spousal support case. For marriages under 10 years, courts generally limit support to approximately half the marriage’s duration. For marriages of 10 years or longer, Family Code § 4336 requires courts to retain jurisdiction indefinitely with no automatic end date. The longer the marriage, the more likely the court will consider the recipient’s needs over an extended period — particularly when one spouse spent years out of the workforce.
Is spousal support taxable in California in 2026?
No. As of January 1, 2026, California changed its tax treatment of spousal support to match federal law. For agreements executed on or after January 1, 2026: the paying spouse cannot deduct payments on their California state return, and the receiving spouse does not report the payments as taxable income. Agreements finalized before January 1, 2026 may continue under prior rules depending on how the agreement was structured. Consulting a tax advisor alongside your family law attorney is strongly recommended.
What happens to spousal support if I retire?
Retirement is one of the most common grounds for modifying spousal support in California. When a paying spouse reaches a reasonable retirement age and their income decreases substantially, they may petition the court to reduce or terminate support. Courts look at whether the retirement is genuine and in good faith and whether the recipient has had sufficient time to become self-supporting. Retirement does not automatically end support — a motion must be filed.
Can we agree to waive spousal support entirely?
Yes. California law permits spouses to waive spousal support by mutual agreement, and that waiver is generally enforceable if both parties were represented by counsel, the agreement was voluntary, and not the product of duress or fraud. A blanket waiver in a marital settlement agreement, once approved by the court, typically divests the court of jurisdiction to award support in the future — even if one party later experiences hardship.
Does California consider fault when awarding spousal support?
California is a no-fault divorce state, and courts generally do not consider marital misconduct — such as infidelity — when determining spousal support. There is one significant exception: Family Code § 4320(i) requires courts to consider documented evidence of domestic violence. A spouse with a domestic violence conviction or active restraining order against them may face a rebuttable presumption against receiving spousal support. Outside of domestic violence, fault does not enter the spousal support calculation.
Talk to a Woodland Hills Spousal Support Attorney
Every spousal support case in California turns on its specific facts — the length of your marriage, both parties’ incomes and earning potential, your marital standard of living, and what the court considers a reasonable path to self-sufficiency. Generic guidelines only take you so far.
Whether you need to understand what you may owe, protect the support you depend on, or modify an existing order, an experienced family law attorney can give you a realistic picture of what to expect in an Los Angeles County courtroom. If both spouses are open to it, divorce mediation can also be an efficient path to reaching a mutually agreed support arrangement without the cost of a contested hearing.
The Law Offices of Leon F. Bennett has been handling spousal support cases in Los Angeles County and Ventura County for more than 40 years. We understand how local judges apply the Family Code § 4320 factors, what vocational evaluators look for, and how to negotiate support terms that reflect the full financial picture of your marriage.
Call (818) 888-7731 or use our online contact form to schedule a confidential consultation. Our office is located at 21300 Victory Blvd., Suite 300, Woodland Hills, CA 91367.
