Alimony after 20 years of marriage in California falls under the rules for a “marriage of long duration,” which means the court keeps jurisdiction over spousal support indefinitely and sets the amount and length case by case rather than by formula. You are not guaranteed lifetime payments, and the paying spouse is not locked into them forever. What you get is a judge weighing more than a dozen statutory factors, with no built-in end date and the power to revisit the order later if circumstances change.
Why 20 Years Changes the Rules
Family Code Section 4336 presumes any marriage of 10 years or more, measured from the wedding to the date of separation, is a marriage of long duration.1California Legislative Information. California Code FAM 4336 At 20 years, the threshold is not in dispute. The consequence is procedural but powerful: the court retains authority over spousal support for as long as either spouse lives, unless the parties agree otherwise in writing or a judge later terminates support based on changed circumstances.
The word “permanent” causes most of the confusion here. It does not mean payments continue forever no matter what. It means the court’s power to order, adjust, or end support never expires on its own. In shorter marriages, judges typically limit support to roughly half the length of the marriage. That rule of thumb is explicitly set aside for long-term marriages.2California Legislative Information. California Code FAM 4320 After 20 years, there is no preset finish line and no formula that produces one.
How the Court Decides the Amount
Long-term spousal support is set under Family Code Section 4320, which lists more than a dozen factors a judge must weigh. No single factor controls, and judges have broad discretion in how much weight to give each one. After a 20-year marriage, several carry particular weight.
- The marital standard of living. The lifestyle the couple maintained during the marriage is the benchmark the court tries to approximate for both spouses, though one household split into two usually means neither side lives as well as before.
- Each spouse’s earning capacity, including current income, marketable skills, education, and what it would take for the lower-earning spouse to re-enter the workforce. A spouse who left a career 15 years ago to raise children faces a very different outlook than one who kept working throughout.
- Contributions one spouse made to the other’s career or education, such as supporting a partner through medical school or a business startup.
- Age and health. A 55-year-old with health problems has fewer realistic paths to self-sufficiency than a healthy 40-year-old, and this factor becomes more important the longer the marriage.
- Any documented history of domestic violence, including emotional abuse, protective orders, and criminal pleas, which weighs against the abusive spouse.
- Tax consequences of the support arrangement for each party.
- The balance of hardships between the parties, a catch-all that lets the judge account for anything else that makes the outcome unfair for one side.
The full statutory list is longer, and judges weigh everything together rather than mechanically.2California Legislative Information. California Code FAM 4320
When Earning Capacity Is Disputed
If the two sides disagree about what the lower-earning spouse can realistically earn, either party can retain a vocational expert. The expert reviews education, work history, transferable skills, and the local job market, then produces a report estimating realistic earnings. These evaluations are common in long-term marriage cases where one spouse has been out of the workforce for years.3Occupational Assessment Services, Inc. (OAS). Why You Need to Obtain a Vocational Evaluation in Your Divorce Case Judges are not required to adopt the expert’s conclusion, but a neutral professional’s assessment tends to carry more weight than either spouse’s own claims. The same tool works the other direction: it can show whether a higher earner is deliberately suppressing income to lower the support number.
How Long Payments Can Last
For a 20-year marriage there is no formula-driven end date. The half-the-length-of-the-marriage guideline that applies to shorter unions is excluded for marriages of long duration under Section 4336.2California Legislative Information. California Code FAM 4320 Support can last as long as the supported spouse needs it and the paying spouse can afford it.4California Courts. Long-term Spousal Support
Indefinite does not mean the court ignores the goal of self-sufficiency. Under Section 4330, a judge can issue a Gavron warning, a formal advisory telling the supported spouse to make reasonable efforts to become self-supporting. The warning puts the recipient on notice that failing to pursue employment or training can lead to reduced or terminated support later. For long-term marriages, the court has discretion to skip the warning if self-sufficiency is unrealistic given the spouse’s age, health, or circumstances.5Justia Law. California Code FAM 4330-4339
In practice, a 20-year marriage in which one spouse earned most of the income while the other handled child-rearing and domestic responsibilities often produces support that runs many years, sometimes into retirement. Even so, “permanent” support ends automatically in two situations: the death of either party, or the remarriage of the supported spouse.6California Legislative Information. California Code FAM 4337
Changing or Ending the Order Later
Long-term support orders can be revisited. Either spouse can ask the court to modify or terminate the order, but the person requesting the change must prove that circumstances have genuinely shifted since the last order.7California Courts. Ask to Change Your Long-Term Spousal Support Order Common triggers include job loss, a significant raise, serious illness, or retirement.
Remarriage
Support terminates automatically when the receiving spouse remarries. No hearing is required, unless the original agreement says otherwise.6California Legislative Information. California Code FAM 4337 The paying spouse’s remarriage does not automatically end the obligation, though it may factor into a modification request if the new marriage substantially changes the payer’s financial picture.
Cohabitation
If the supported spouse moves in with a new romantic partner without marrying, California law creates a rebuttable presumption that the need for support has decreased.8California Legislative Information. California Code FAM 4323 The couple does not need to hold themselves out as married for the presumption to apply. Simply living together is enough. The supported spouse can try to overcome the presumption by showing expenses have not actually dropped, but the paying spouse has a real path to a reduction or termination. This catches people off guard, because the arrangement feels informal while the legal effect is not.
If You Signed a Prenup or Postnup
A prenuptial or postnuptial agreement can override the default spousal support rules, including waiving support entirely, but California enforces these waivers only under strict conditions. Under Family Code Section 1612, any provision limiting or waiving spousal support is unenforceable if the spouse giving up support was not represented by an independent attorney when signing. Even with independent counsel, the provision fails if it would be unconscionable at the time enforcement is sought.9California Legislative Information. California Code Family Code 1612
That second prong, unconscionability measured at enforcement rather than at signing, is what undoes many agreements in long-term marriages. A waiver that looked reasonable when both spouses were 30 and employed can look very different two decades later if one of them left the workforce to raise children and now has limited earning potential. Courts assess fairness based on conditions at the time of the divorce, not conditions when the paperwork was signed. If you have an agreement in the drawer, do not assume it dictates the outcome without a lawyer reviewing how a judge is likely to treat it after 20 years.
What Support Costs After Taxes
Any number discussed in your case needs to be read against the current tax treatment, because it has changed. For divorce or separation agreements finalized after December 31, 2018, spousal support is not tax-deductible for the payer and not taxable income to the recipient.10Internal Revenue Service. Topic No. 452, Alimony and Separate Maintenance The change, introduced by the Tax Cuts and Jobs Act, is permanent. It also reaches pre-2019 agreements that were later modified, if the modification expressly adopts the new rule.11Internal Revenue Service. Divorce or Separation May Have an Effect on Taxes
The negotiating impact is real. Under the old rules, a high earner could deduct payments and effectively share the cost with the IRS. That incentive is gone. Every dollar of support is now paid with after-tax money by the payer and received tax-free by the recipient, which in a 20-year marriage with a large income gap often means the paying spouse’s true cost is higher than it would have been before 2019, and the receiving spouse’s net is higher than the pre-tax figure might suggest.