Temporary spousal support under the guideline formula many California counties use
California splits alimony into two very different phases, and only one of them has a formula. While the divorce is pending, courts award temporary support, called pendente lite support, and many counties (Santa Clara and Alameda are the best-known examples) compute it with a guideline: 40% of the higher earner's net monthly income minus 50% of the lower earner's net, before any child support adjustments. That's the formula this calculator runs, with net approximated as 70% of gross if you only know gross pay.
Long-term support after the judgment is a different animal. There's no formula; judges weigh the Family Code section 4320 factors, including each spouse's earning capacity, the marital standard of living, age, health, and contributions to the other's career. Marriage length matters a lot: marriages of roughly 10 years or more count as "long duration," which keeps the court's jurisdiction over support open indefinitely, while shorter marriages often see support for about half the marriage length. Use the guideline number below as a starting point for the temporary phase, not a prediction of the final order.
⚖️ Not legal advice. Real awards depend on the judge, state statutes, and negotiated agreements. These formulas are educational starting points; talk to a family law attorney.
| Higher Earner Net | Lower Earner Net $0 | Lower Earner Net $2,000 | Lower Earner Net $4,000 |
|---|---|---|---|
| $5,000 | $2,000 | $1,000 | $0 |
| $6,000 | $2,400 | $1,400 | $400 |
| $7,500 | $3,000 | $2,000 | $1,000 |
| $10,000 | $4,000 | $3,000 | $2,000 |
| $12,500 | $5,000 | $4,000 | $3,000 |
| $15,000 | $6,000 | $5,000 | $4,000 |
| $17,500 | $7,000 | $6,000 | $5,000 |
| $20,000 | $8,000 | $7,000 | $6,000 |
Every cell is 40% of the higher earner's net minus 50% of the lower earner's net, floored at zero. Example: $10,000 and $4,000 nets give $4,000 minus $2,000, which is $2,000 a month.
Child support comes first. When one parent also pays guideline child support, the spousal support formula runs on income after that obligation, which usually lowers the number, and courts use certified software (DissoMaster is the common one) for the combined calculation. The formula also ignores the section 4320 factors entirely, which is exactly why judges may only use it for the temporary phase. For a multi-state view, the main alimony calculator compares California-style outcomes with Texas, New York, and Illinois, and the child support calculator handles the kids' side of the ledger.
There are two phases. Temporary support during the divorce follows a county guideline in many courts: 40% of the higher earner's net monthly income minus 50% of the lower earner's, adjusted when child support is also being paid. Long-term support after the divorce has no formula at all; judges weigh the Family Code section 4320 factors, including marriage length, earning capacity, age, health, and the marital standard of living.
Sort of, but it's widely misunderstood. A marriage of about 10 years or more is presumed to be of long duration, which means the court keeps jurisdiction over support indefinitely rather than guaranteeing lifetime payments. For shorter marriages, the common rule of thumb is support for half the length of the marriage. Either way, amounts can be modified or ended as circumstances change.
Federal and state rules split here. For agreements signed after 2018, spousal support isn't deductible for the payer or taxable to the recipient on federal returns. California didn't adopt that change for state taxes, so on a California return the payer can still deduct support and the recipient still reports it as income.