California Alimony / Spousal Support Estimator

California uses two methods depending on the stage of dissolution. Temporary spousal support is calculated using county-specific computer guidelines like DissoMaster, which generally applies approximately 40% of the higher earner's net income minus 50% of the lower earner's net income under Family Code § 3600. Long-term spousal support after judgment has no formula — courts apply 14 statutory factors under Family Code § 4320, including earning capacity, marital standard of living, and each spouse's needs.

California recognizes two primary types of spousal support. Temporary spousal support is paid during dissolution proceedings to maintain financial stability, calculated using guideline software under Family Code § 3600. Long-term or permanent spousal support begins after the judgment of dissolution and is determined by the court's analysis of Family Code § 4320 factors. Long-term support amounts are typically 10% lower than temporary support, though this varies by case.

Duration depends on marriage length under Family Code § 4336. For marriages under 10 years, support generally lasts half the duration of the marriage — a 6-year marriage typically yields about 3 years of support. For marriages of 10 years or longer, classified as long-term under § 4336, courts retain indefinite jurisdiction and may not set a termination date. Courts issue Gavron warnings under Family Code § 4330 advising supported spouses to become self-supporting within a reasonable period.

Family Code § 4320 lists 14 factors courts must evaluate for long-term spousal support. Key factors include each party's earning capacity and marketable skills, the marital standard of living, the supported spouse's contributions to the other's education or career, the supporting party's ability to pay, and the length of marriage. Courts also consider documented domestic violence history, the supported spouse's periods of unemployment for domestic duties, and each party's assets and obligations including separate property.

California courts can modify spousal support upon proof of a material change in circumstances, such as job loss, disability, retirement, or significant income changes. Under Family Code § 4337, support terminates automatically upon the recipient's remarriage unless waived in writing. Family Code § 4323 creates a rebuttable presumption that the recipient's need decreases upon cohabitation with a new romantic partner, though the recipient can present evidence that full support remains necessary.

Adultery does not affect spousal support in California. As a pure no-fault state since 1970, California grants dissolution only on the ground of irreconcilable differences — marital misconduct including infidelity is not a statutory factor under Family Code § 4320. Courts determine spousal support based solely on financial factors such as earning capacity, marital standard of living, and ability to pay. However, if a spouse spent community funds on an extramarital relationship, that dissipation of assets may be addressed in the property division.

Federal and California state tax treatment differ for spousal support. For agreements executed after December 31, 2018, the federal Tax Cuts and Jobs Act eliminated the payor's deduction and the recipient's inclusion in gross income. However, California did not conform to this federal change — spousal support remains deductible by the payor and taxable income to the recipient on California state returns. For pre-2019 agreements, the old federal rules still apply unless a modification expressly adopts the new treatment.

California allows spousal support waivers in premarital agreements, but Family Code § 1612(c) imposes strict enforceability requirements. The party waiving support must have independent legal counsel at the time of signing — a general waiver of counsel is insufficient. Additionally, the waiver cannot be unconscionable at the time of enforcement. Courts may refuse to enforce a complete waiver if it would leave one spouse destitute while the other retains substantial assets. Many attorneys recommend limiting rather than fully waiving support to withstand judicial scrutiny.