Quick Answer
Alimony is calculated in one of two ways depending on the state. About half the states use a guideline formula that produces a presumptive amount based on income differences. The other half use factor based discretion, requiring courts to weigh statutory factors and reach a result. California uses both: a formula for temporary support during the divorce, and the 14 factors in California Family Code section 4320 for long term support after divorce. Common factors across all states include length of marriage, earning capacity of each spouse, the marital standard of living, contributions to the other spouse’s career, and ability to pay. The most important factor is usually the length of the marriage.
Table of Contents
Two Approaches Formula States and Factor States
Every state requires courts to consider alimony when a marriage ends, but states differ dramatically in how the calculation is performed.
Formula States
Formula states use a mathematical equation to calculate a presumptive alimony amount. The court must order this amount unless specific findings justify a deviation. Formula states include Texas, New York (for incomes under a statutory cap), Massachusetts, Pennsylvania, and California (for temporary support only). The advantage of formula states is predictability. Both spouses can run the numbers and know roughly what to expect.
Factor States
Factor states do not publish a formula. Instead, the law lists factors the court must consider, and the judge has discretion to set the amount. Factor states include California (for long term support), Florida (for permanent and durational alimony), New Jersey, Virginia, and most southern states. The advantage of factor states is flexibility to address unusual situations. The disadvantage is unpredictability. Two judges may reach different amounts on the same facts.
Hybrid States
Some states use a formula for temporary support during the divorce and factors for permanent support after divorce. California is the leading example. New York adopted a similar approach in 2010 for incomes under a statutory cap, with discretionary factors above the cap.
The Most Common Alimony Formulas
When formulas are used, they typically follow one of several common patterns.
Income Difference Formula
This is the most common formula type. It calculates alimony as a percentage of the difference between the two spouses’ incomes. Specific percentages vary:
- New York post divorce maintenance: 20 percent of the difference between incomes if there are no minor children; 30 percent if there are children
- Massachusetts general formula: 30 to 35 percent of the income difference
- Pennsylvania temporary support: 40 percent of the difference between net incomes
- California temporary support (county guidelines): approximately 40 percent of payer’s net income minus 50 percent of payee’s net income
Percentage of Payer Formula
Some states cap alimony at a percentage of the paying spouse’s income. Texas is the most restrictive, with court ordered spousal maintenance capped at $5,000 per month or 20 percent of the paying spouse’s gross monthly income (whichever is less) under Texas Family Code section 8.054.
Combined Income Formula
Some states (notably New York for incomes under the statutory cap) use a combined income approach similar to the Income Shares Model used in child support. The combined income of both spouses is calculated, then a percentage is applied to determine total support, then divided based on each spouse’s share of combined income.
How California Calculates Alimony
California uses two different methods depending on the timing of the support. For temporary support during the divorce, California courts use a formula based approach. For long term post judgment support, California uses the 14 factor analysis in California Family Code section 4320. Both calculations are typically performed with attorney assistance from a board-certified family law specialist.
Temporary Spousal Support Formula
California courts use county based guidelines for temporary spousal support. The most common is the Santa Clara guideline, used in many California counties:
Temporary Support = 40 percent of payer’s net monthly income, MINUS 50 percent of payee’s net monthly income
If there is child support paid as well, the calculation is adjusted to account for the child support. The Dissomaster and XSpouse software programs both produce this calculation automatically. The result is presumptively correct for temporary support, although the court has discretion to deviate based on the specific circumstances.
Long Term Spousal Support Analysis
For long term support ordered with the final divorce judgment, California prohibits the use of formula based calculations. The court must instead apply the 14 factors in California Family Code section 4320. This is a discretionary analysis with no fixed formula. The court must weigh each factor and explain its decision.
The 14 Factors in California Family Code 4320
California Family Code section 4320 lists the factors a court must consider for permanent spousal support:
- The earning capacity of each party, including the marketable skills of the supported party, the job market for those skills, time and expense required to acquire skills, and the extent to which earning capacity was impaired by periods of unemployment incurred during the marriage to care for children
- The extent to which the supported party contributed to the attainment of an education, training, career position, or license by the supporting party
- The ability of the supporting party to pay spousal support, taking into account earning capacity, earned and unearned income, assets, and standard of living
- The needs of each party based on the standard of living established during the marriage
- The obligations and assets, including the separate property, of each party
- The duration of the marriage
- The ability of the supported party to engage in gainful employment without unduly interfering with the interests of dependent children in the custody of the party
- The age and health of the parties
- All documented evidence of any history of domestic violence between the parties or perpetrated by either party against either party’s child
- The immediate and specific tax consequences to each party
- The balance of the hardships to each party
- The goal that the supported party shall be self supporting within a reasonable period of time
- The criminal conviction of an abusive spouse shall be considered in making a reduction or elimination of a spousal support award
- Any other factors the court determines are just and equitable
Importantly, no single factor controls. The court must weigh all of them. A judge in San Bernardino County may emphasize different factors than a judge in Los Angeles or Orange County, even on similar facts.
How Income Is Determined for Alimony
Income for alimony purposes is broadly defined, similar to but not identical to income for child support. Common sources of income considered include:
- Salary, wages, tips, bonuses, and commissions
- Self employment income (gross receipts minus reasonable business expenses)
- Investment income (interest, dividends, capital gains)
- Rental income from real property
- Trust distributions
- Retirement plan distributions and pensions
- Social Security retirement benefits (but not SSI)
- Disability benefits
- Royalties
- Imputed income when a spouse is voluntarily unemployed or underemployed
Means tested benefits such as CalWORKs and Supplemental Security Income are excluded. Inheritances received after separation are also generally excluded from alimony calculations, though they may be considered in the overall financial picture.
Imputed Income for Alimony
If a spouse is voluntarily unemployed or underemployed, the court can impute income based on what the spouse could be earning. This prevents a high earning spouse from quitting work to reduce alimony, and prevents a low earning spouse from refusing to work to increase alimony. The court considers:
- The spouse’s work history
- Available jobs in the area
- The spouse’s education, training, and skills
- Whether the spouse has legitimate reasons for not working at full capacity
Vocational evaluations are commonly used in contested alimony cases. A vocational evaluator interviews the spouse, reviews work history, and provides an opinion about realistic earning capacity. These evaluations cost $3,000 to $8,000.
How Length of Marriage Affects the Amount
Length of marriage is one of the most important factors in alimony calculations across nearly every state. The general principle is that longer marriages produce longer and larger alimony awards.
| Length of Marriage | Typical Duration | California Treatment |
| Under 5 years | Rarely awarded; 6 months to 2 years if awarded | Half the length of marriage rule |
| 5 to 10 years | Half the length of the marriage | Half the length of marriage rule |
| 10 to 20 years | Half to two thirds the length | Long term marriage; court retains jurisdiction indefinitely (FC section 4336) |
| 20+ years | Often indefinite or until retirement | Long term marriage; court retains jurisdiction indefinitely |
California Family Code section 4336 specifies that for marriages of long duration (presumed to be 10 years or more), the court retains jurisdiction to make and modify support orders indefinitely. This does not mean alimony lasts forever. It means the court can revisit the issue if circumstances change.
Sample Calculations by State
Consider a couple where the higher earner makes $10,000 per month gross and the lower earner makes $3,000 per month gross. Here is what the temporary alimony order might look like in different states (assumes no children, similar tax situations):
| State | Calculation | Approx Monthly Amount |
| California (temporary) | 40 percent of $7,500 net minus 50 percent of $2,200 net | Approximately $1,900 |
| New York | 20 percent of $7,000 income difference | Approximately $1,400 |
| Massachusetts | 30 to 35 percent of $7,000 income difference | Approximately $2,100 to $2,450 |
| Texas | 20 percent of $10,000 gross or $5,000 cap | Up to $2,000 (subject to qualifying criteria) |
| Pennsylvania (temp) | 40 percent of $7,000 net difference | Approximately $2,800 |
These are approximations. Actual calculations involve many additional adjustments such as health insurance premiums, mandatory retirement contributions, and tax filing status.
Temporary vs Long Term Alimony
Most divorces involve two separate alimony calculations:
Temporary Support (Pendente Lite)
Temporary support is ordered during the divorce, while the case is pending. The purpose is to maintain the financial status quo until the final judgment. Most states use a simple formula because the goal is speed and predictability. Temporary support typically lasts 6 to 18 months while the divorce is processed.
Long Term Support (Permanent Support)
Long term support is ordered with the final divorce judgment. The amount, duration, and modifiability of long term support require a more detailed analysis. California prohibits using the temporary support formula for long term support and requires factor based analysis under California Family Code section 4320.
The amount of long term support is often lower than temporary support because the supported spouse is expected to begin working toward self sufficiency. Long term support also typically has a fixed end date or step downs over time.
Tax Treatment Impact on Alimony Amount
The Tax Cuts and Jobs Act of 2017 significantly changed how alimony is taxed federally, which affects how much alimony is awarded.
Before 2019: Deductible to Payer, Taxable to Recipient
Under the old rules in 26 U.S.C. section 71 (now repealed), the paying spouse could deduct alimony from federal taxable income. The receiving spouse paid taxes on the alimony as ordinary income. This shifted income from a higher tax bracket to a lower one, creating tax savings that allowed for larger alimony payments.
After 2019: No Federal Deduction
For divorces finalized after December 31, 2018, alimony is not deductible to the paying spouse and is not taxable to the receiving spouse. This change typically results in lower alimony awards because the paying spouse cannot get any tax benefit from the payment. The net effect is that alimony awards in formula states have generally decreased by 10 to 20 percent since 2019.
California State Tax Treatment
California maintained the old tax treatment for state income tax purposes. California allows the paying spouse to deduct alimony from California taxable income and requires the receiving spouse to report it as California income. This creates a difference between federal and state tax treatment that complicates planning for California divorces.
When the Formula Is Overridden
Even in formula states, courts can deviate from the formula result when justified by specific findings. Common reasons for deviation include:
- Inability of the paying spouse to actually pay the formula amount without hardship
- Significant assets owned by either party that affect the analysis
- Health problems that affect earning capacity
- Domestic violence findings that justify higher or lower support
- Disparity in retirement accounts received in the divorce
- Significant child related expenses not captured in the formula
- Substantial separate property income
Deviations must be explained in writing by the court. A simple disagreement with the formula is not enough. The court must make specific findings that support the deviation.
Frequently Asked Questions
Q: How is alimony calculated in California?
A: California uses two different methods. For temporary support during the divorce, California courts use a formula that calculates 40 percent of the high earner’s net income minus 50 percent of the low earner’s net income, adjusted for any child support. For long term support after divorce, California requires courts to apply the 14 factors in California Family Code section 4320 with no fixed formula.
Q: What is the formula for alimony in most states?
A: There is no single formula. About half the states use a percentage based formula such as 20 to 40 percent of the income difference between spouses. The other half use a factor based analysis with no formula. Common factors include length of marriage, earning capacity, marital standard of living, and ability to pay.
Q: Does the length of the marriage matter for alimony?
A: Yes, length of marriage is one of the most important factors. The general rule across most states is that marriages under 5 years rarely produce alimony. Marriages from 5 to 10 years often produce alimony lasting half the length of the marriage. Marriages of 10 to 20 years typically produce longer and larger awards. Marriages over 20 years often produce indefinite alimony in states where it is still allowed.
Q: What income counts for alimony calculations?
A: Income for alimony purposes includes wages, self employment income, investment income, rental income, retirement distributions, and similar sources. Bonuses and commissions are usually averaged over multiple years for predictability. Imputed income may be added if a spouse is voluntarily unemployed or underemployed. Means tested benefits and inheritances are typically excluded.
Q: Can I avoid paying alimony if my spouse cheated?
A: In most states, no. California is a no fault divorce state, meaning marital fault generally does not affect alimony. The court focuses on financial factors rather than blame. A few states still consider marital fault, but even there, fault usually only affects alimony if it caused financial harm (such as a spouse spending marital funds on an affair).
Q: How do courts decide between formula and discretion?
A: The state legislature decides. Each state’s family code specifies whether alimony is formula based, factor based, or both. California uses a formula for temporary support during the divorce and discretion for long term support after divorce. The legislature makes this choice as a matter of public policy, and individual judges cannot change it.
Q: Can spouses agree to a different alimony amount than the formula?
A: Yes. Spouses can agree to any alimony amount in their settlement, including zero, more than the formula, or less than the formula. Courts generally approve agreed amounts as long as the parties understood their rights and the agreement is not unconscionable. The formula is presumptive, not mandatory, when both spouses agree.
Q: How long does alimony last in 2026?
A: Duration varies enormously by state and marriage length. Short marriages typically produce no alimony or 1 to 2 years. Medium marriages (5 to 10 years) usually produce alimony lasting half the length of the marriage. Long marriages (10 to 20 years) often produce alimony lasting half to two thirds the marriage length. Very long marriages (20+ years) can produce indefinite alimony in some states. Florida has abolished permanent alimony entirely and capped durations based on marriage length.
Bottom Line
Alimony calculation is not one formula but a state by state mix of formulas, factors, and judicial discretion. California uses a formula for temporary support during divorce and the 14 factors in California Family Code section 4320 for long term support. The length of marriage is consistently one of the most important factors across every state. The Tax Cuts and Jobs Act of 2017 significantly changed federal tax treatment and reduced typical alimony amounts.
Because alimony calculations involve so many variables, running the numbers with a free consultation with a board-certified family law specialist can clarify what to expect in your specific case.
About the Author
Donald Glen Haslam, Esq. is a Board-Certified Family Law Specialist by the California State Bar Board of Legal Specialization and a senior partner at Haslam & Thorne, LLP in Ontario, California. He has practiced family law exclusively for over 40 years, representing families throughout San Bernardino County and the Inland Empire. Reviewed by Brian George Thorne, Esq., Board-Certified Family Law Specialist.
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Disclaimer: This article is for general informational purposes only and does not constitute legal advice. Alimony law is governed by state-specific statutes and varies significantly by jurisdiction. Tax treatment of alimony depends on the date of divorce and current federal and state law. Every alimony situation is unique. For advice specific to your circumstances, consult with a licensed family law attorney in your state. Reading this article does not create an attorney-client relationship with Haslam & Thorne, LLP.
