Pennsylvania has three kinds of payment between spouses: spousal support, alimony pendente lite (APL) while the divorce is pending, and alimony after the divorce decree. Spousal support and APL follow a guideline formula based on net incomes, while post-divorce alimony has no formula: the court decides if it's necessary using 17 factors in the statute.
Mixing those three up is an easy mistake to make. The formula you'll find online applies to the first two, not to alimony after the decree.
This is a plain-English summary of what the statute says, checked in October 2026. It isn't legal advice, and a family lawyer or your county court's self-help center can tell you how it applies to your case.
The three kinds of spousal payment
| Type | Where the rule lives | How the amount is set |
|---|---|---|
| Spousal support | Pennsylvania's support guidelines, Pa.R.Civ.P. 1910.16-4 | Guideline formula on monthly net incomes |
| Alimony pendente lite (APL) | 23 Pa.C.S. 3702 and the same guideline formula | Guideline formula on monthly net incomes |
| Alimony | 23 Pa.C.S. 3701, after a divorce decree | No formula; the court weighs 17 factors |
The guideline formula for spousal support and APL
Rule 1910.16-4 sets out the worksheet for orders entered on or after January 1, 2019. The percentages depend on whether there are dependent children.
| Without dependent children | With dependent children | |
|---|---|---|
| Payer's monthly net income multiplied by | 33% | 25% |
| Recipient's monthly net income multiplied by | 40% | 30% |
| Preliminary amount | Payer's figure minus recipient's figure | Payer's figure minus recipient's figure |
If the result is below zero, it's entered as zero. With children, the spousal support figure is calculated first, and the child support worksheet then uses incomes adjusted for it. In high-income cases, the rule tells the court to use the formula as a preliminary analysis rather than the final word.
The worksheet works on monthly figures, so weekly or fortnightly pay is converted to a monthly amount first. Net income starts from total gross income minus the deductions the guidelines allow, and any support the payer already owes to children or former spouses outside the case comes off before the percentage is applied.
Alimony after the divorce: the 17 factors
Under Section 3701, the court may allow alimony it deems reasonable only if it finds alimony is necessary. It then considers all relevant factors, including:
- Relative earnings and earning capacities, and the ages and health of both spouses.
- Sources of income, including medical, retirement and insurance benefits, plus expectancies and inheritances.
- The duration of the marriage and the standard of living established during it.
- Contributions to the other spouse's education or earning power, and the contribution of a spouse as homemaker.
- The effect of being custodian of a minor child on earning power and expenses.
- Relative assets, liabilities and needs, property brought to the marriage, and the tax ramifications of the award.
- Marital misconduct during the marriage, and whether the spouse lacks enough property or can't support themselves through appropriate employment.
When alimony counts as necessary
Alimony after the decree isn't automatic, even after a long marriage. The last two factors in Section 3701 point to the real test: whether the spouse asking lacks enough property, including property divided in the divorce, to meet their reasonable needs, and whether they're incapable of self-support through appropriate employment. A spouse who receives a large share of the marital property may find alimony harder to justify.
APL is a different animal. Section 3702 covers alimony pendente lite together with counsel fees and expenses, which is why the same section deals with help toward the costs of the divorce itself while the case is pending.
The misconduct rule people miss
Factor 14 has a limit built in. Marital misconduct after the date of final separation isn't considered, except that the court must consider abuse of one party by the other. So behavior after you separate generally won't change an alimony award, but abuse will.
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How long it lasts and when it ends
- The court sets the duration, which can be definite or indefinite, as long as it's reasonable.
- The court has to state its reasons for awarding or denying alimony and the amount.
- Either party can ask to modify, suspend or end it after a substantial and continuing change in circumstances; any change applies only to payments after the petition.
- Remarriage of the person receiving alimony ends the award.
- A court-approved agreement to pay alimony becomes a court order and can be enforced like one.
For tax, the IRS says alimony under an agreement executed after 2018 isn't deductible by the payer and isn't income for the recipient. Because a post-2018 payer gets no deduction, it can be worth rechecking withholding; this guide to the W-4 form covers how.
Verdict
In Pennsylvania, start by working out which payment you're dealing with, because the rules, the evidence and even the right section of the law change with each one. Spousal support and APL run on a predictable formula, so you can estimate them from net incomes. Alimony after the decree is a judgment call against 17 factors, and it has to be necessary first. If you're co-parenting through the process, a shared co-parenting app keeps expense records in one place, which helps when the guidelines come into play.
Frequently asked questions
How is spousal support calculated in Pennsylvania?
Under Rule 1910.16-4, without dependent children it's 33% of the payer's monthly net income minus 40% of the recipient's. With dependent children it's 25% minus 30%.
What is alimony pendente lite in Pennsylvania?
It's support paid while the divorce case is pending, under 23 Pa.C.S. 3702. It uses the same guideline formula as spousal support.
Is there a formula for alimony after divorce in Pennsylvania?
No. Under 23 Pa.C.S. 3701, the court decides whether alimony is necessary and sets the amount and duration by weighing 17 factors.
Does remarriage end alimony in Pennsylvania?
Yes. Section 3701 says remarriage of the party receiving alimony terminates the award.
Does cheating affect alimony in Pennsylvania?
Marital misconduct during the marriage is one of the 17 factors. Misconduct after final separation isn't considered, except abuse.
Can spouses agree on alimony in Pennsylvania?
Yes. Under Section 3701(f), when the court approves an alimony agreement the spouses entered into voluntarily, the agreement becomes the order of the court and can be enforced through the arrears process in Section 3703.
