Fault Divorce in PA: Grounds, Proof, and Court Process

A fault divorce in PA ends a marriage by proving that your spouse committed specific misconduct recognized by state law, rather than relying on mutual consent or a period of separation. Pennsylvania recognizes six fault grounds plus a separate ground for long-term institutionalization, and a successful fault claim can shift the alimony analysis in your favor. It will not, however, get you a larger share of the marital property. Fault cases also take more time, cost more money, and give your spouse defenses that a no-fault case doesn’t.

Who Can File in Pennsylvania

At least one spouse must have been a genuine resident of Pennsylvania for the six months immediately before filing.¹ It doesn’t matter which of you meets the requirement. If neither does, the court will dismiss the case for lack of jurisdiction.

The Six Fault Grounds

Pennsylvania grants a fault divorce to the “innocent and injured spouse,” so you have to show the misconduct is your spouse’s, not yours. The grounds are:

Desertion. Your spouse left the home without reasonable cause and without your agreement, and has been gone at least one year.²
Adultery. Your spouse had a sexual relationship outside the marriage.
Cruel and barbarous treatment. Your spouse’s conduct endangered your life or health, typically through severe physical abuse or behavior creating a genuine fear of serious harm.
Bigamy. Your spouse knowingly married you while still legally married to someone else.
Imprisonment. Your spouse was convicted of a crime and sentenced to two or more years in prison.
Indignities. Your spouse engaged in a pattern of conduct over time that made your life intolerable and burdensome, such as sustained disrespect, contempt, or emotional neglect that destroyed the relationship.

A separate ground exists for institutionalization. If your spouse has been confined in a mental institution for at least 18 months before you file, and there is no reasonable prospect of discharge within the following 18 months, the court can grant the divorce. The institution’s superintendent must provide a certificate confirming these conditions, supported by a statement from the treating physician.²

What You Have to Prove

A fault divorce lives or dies on evidence. The court won’t take your word, and the standard is higher than in a no-fault case where both spouses simply agree the marriage is over. The kind of proof you need tracks the ground you’re alleging.

Direct proof of adultery is rare. Most cases run on circumstantial evidence: a private investigator’s testimony, phone records, text messages, emails, hotel receipts, or photographs. You generally need to show both opportunity and inclination. A single suspicious text won’t carry a case; a pattern of communication combined with overnight stays can.

For desertion, you need to show your spouse left without your consent, had no reasonable justification, and has stayed away at least a year. Testimony from friends or family who saw the departure helps. A lease in a new location, forwarded mail, or correspondence indicating no intent to return fills out the picture.

Cruel and barbarous treatment calls for evidence of severity. Medical records showing injuries, police reports from domestic violence incidents, and photographs of physical harm all carry weight. Witnesses who saw the abuse or its aftermath strengthen the case.

Indignities is the hardest ground to prove because it rests on a pattern rather than a single event. Courts look for a sustained course of conduct. A dated log of incidents, testimony from friends or a therapist who observed the behavior, and written communications showing contempt or hostility help establish the pattern a judge needs to see.

Defenses Your Spouse Can Raise

Pennsylvania preserves traditional common-law defenses against fault claims.³ A successful defense can defeat the divorce entirely. The main ones:

Condonation. You forgave the misconduct and resumed the marital relationship. Learning about an affair and continuing to live together as spouses is the classic example.
Connivance. You consented to or facilitated the misconduct, for example by encouraging your spouse’s affair to manufacture a ground for divorce.
Recrimination. You are guilty of similar misconduct. If you allege adultery but also had an affair, your spouse can raise this as a bar.
Provocation. Your own conduct provoked the misconduct you’re now complaining about.

Adultery carries additional specific defenses. Your spouse can defeat the claim by proving you engaged in similar conduct, that you resumed the sexual relationship after learning about the affair, that you pushed them toward the situation, or that you exposed them to circumstances leading to the infidelity.³ These are permanent bars to an adultery-based divorce, not temporary obstacles.

None of these defenses apply to no-fault filings. Pennsylvania abolished condonation, connivance, collusion, recrimination, and provocation as defenses in no-fault cases.³ That is one of the practical reasons fault divorces carry more risk: your spouse has a wider set of tools to fight back.

How the Case Moves Through Court

You start by filing a Divorce Complaint with the prothonotary (the clerk of civil courts) in the appropriate county. The complaint identifies both spouses, states Pennsylvania residency, lists the date and place of marriage, and specifies the fault ground in language that tracks the divorce statute. If you’re filing on indignities, the complaint must also include a statement that you’ve been advised about the availability of marriage counseling.⁴

The complaint must then be formally served on your spouse, who can admit the allegations, deny them, or raise a defense. If the case is contested, it moves into an evidentiary phase, and the court may appoint a master to hear testimony on the disputed issues.⁵ The master takes testimony from both sides and their witnesses, then submits a report with a recommendation. Either party can request a new hearing before the judge if they disagree with the master’s findings. The judge issues the final decree.

Filing fees vary by county. In Allegheny County, for example, the base fee for a divorce complaint is roughly $192, with extra charges for claims like custody.⁶ Check with the prothonotary in your own county before filing.

What a Fault Finding Actually Changes

Alimony

Marital misconduct is one of the factors a Pennsylvania court weighs when deciding whether to award alimony, how much, and for how long.⁷ A fault finding doesn’t automatically guarantee support or block it. It sits alongside income, earning capacity, age, health, and length of the marriage. When the other financial factors are close, proving fault can tip the outcome.

Timing matters. The court considers misconduct that happened during the marriage but excludes conduct after the date of final separation from the alimony analysis. The one exception is abuse: post-separation abuse can still be weighed.⁷

Property Division

Fault does not affect how property is divided. Pennsylvania uses equitable distribution, meaning a fair split based on economic circumstances rather than an automatic 50/50, and the statute explicitly directs the court to divide marital property “without regard to marital misconduct.”⁸ Proving adultery or desertion will not get you a larger share of the house, the savings, or the investments.

The court instead looks at economic factors: length of the marriage, each spouse’s income and earning capacity, contributions to the other spouse’s education or career, standard of living during the marriage, and who will have primary custody of any minor children. Tax consequences and the cost of transferring specific assets also factor in. Each asset can be divided at a different percentage.⁸

What It Costs and Whether It’s Worth It

Fault divorces cost more than no-fault cases because you’re building and presenting a case the other side can contest. Court fees are the smallest piece, typically a few hundred dollars. Attorney fees are where the real expense builds up. Contested fault cases require more attorney time for evidence gathering, depositions, hearings before the master, and potentially a full trial. Hourly rates for Pennsylvania divorce attorneys generally run from $250 to $450 depending on experience and county.

If you’re alleging adultery or another ground that benefits from surveillance, a private investigator adds another layer. Investigator rates vary widely, from $50 to several hundred dollars per hour. A straightforward surveillance case might cost a few thousand dollars; a longer investigation can run considerably higher.

Pennsylvania’s no-fault paths avoid all of this. You can divorce by mutual consent after 90 days, or by showing an irretrievable breakdown after one year of separation, without proving misconduct at all.² For many people the alimony advantage from a fault finding is modest compared to the litigation cost. Where abuse, a sustained pattern of indignities, or serious misconduct has occurred, the fault path both recognizes the harm and puts a concrete factor on the alimony scale. That’s the calculation to make before filing.

1
Pennsylvania General Assembly. Pennsylvania Code 23-3104 – Bases of Jurisdiction
2
Pennsylvania General Assembly. Pennsylvania Code 23-3301 – Grounds for Divorce
3
Pennsylvania General Assembly. Pennsylvania Code 23-3307 – Defenses
4
Pennsylvania Courts. Pennsylvania Code 231-1920 – Actions of Divorce or for Annulment of Marriage
5
Pennsylvania General Assembly. Pennsylvania Code 23-3321 – Hearing by Master
6
Allegheny County. Family Division Fees
7
Pennsylvania General Assembly. Pennsylvania Code 23-3701 – Alimony
8
Pennsylvania General Assembly. Pennsylvania Code 23-3502 – Equitable Division of Marital Property