Is It Illegal to Cheat on Your Spouse? Adultery Laws Explained
Is it illegal to cheat on your spouse? In the United States, the answer depends on the state and the conduct involved. Some states still have criminal adultery statutes. In others, an affair is primarily a relationship and family-law issue.
That distinction matters. A person may face no criminal adultery charge but still have to address questions about alimony, money spent on an affair, or a separate civil lawsuit. Conversely, finding an old criminal statute does not tell you whether it is currently enforceable or likely to be prosecuted.
The useful starting point is to separate three questions: Is the conduct a crime? Does it affect the divorce? Can it support another legal claim?What to know before taking legal action
- Criminal adultery, divorce fault, and civil lawsuits are separate legal issues.
- Some adultery statutes require sexual intercourse; relationship betrayal can be broader.
- An affair does not automatically mean jail, loss of custody, or loss of all marital property.
- Separation can matter, but moving out does not itself end a marriage.
- Preserve relevant records you may lawfully access and get advice before using surveillance.
What counts as cheating under the law?
People use “cheating” to describe many behaviors: a sexual relationship, romantic messages, an emotional affair, or secret activity on a dating app. A criminal statute does not necessarily cover all of them.
For example, Arizona Revised Statutes § 13-1408 addresses sexual intercourse involving a married person and someone other than that person’s spouse. Virginia Code § 18.2-365 also uses sexual intercourse in defining the offense.
Those definitions help explain why an upsetting message is not, by itself, proof of every legal element. Evidence of flirting may show a relationship, but a court must apply the requirements of the particular claim.
Emotional affairs and online cheating
An emotional affair or sexting does not automatically satisfy a statute requiring sexual intercourse. However, messages may be relevant evidence in a divorce or another dispute, depending on local law and how they were obtained.
Keep the questions separate: what the messages show, whether the conduct meets the legal definition, and whether the evidence can lawfully be used. A screenshot alone does not resolve all three.
Cheating while unmarried
Breaking an exclusivity promise to a boyfriend or girlfriend is not automatically criminal adultery. The marital-status requirement still matters.
An unmarried person can nevertheless fall within some statutes if the other person is married. Arizona’s statute expressly covers that situation. Separate conduct such as threats or unauthorized account access must also be evaluated under its own law, rather than treated as part of a general “cheating in a relationship law.”
Is it illegal to cheat on your spouse in America in 2026?
No single nationwide civilian adultery rule exists. State law controls the examples below, while military law raises a separate issue.
Be cautious with online lists claiming that adultery is illegal in an exact number of states. A list can become inaccurate after a repeal. It can also combine statutes addressing an individual sexual act with laws addressing cohabitation or other conduct, without explaining the difference.
State adultery laws: ten examples worth distinguishing
The table describes the cited statutory text or enacted repeal. It does not predict prosecution or determine whether a particular application would survive a constitutional challenge. Florida and South Carolina are especially important examples: their provisions address patterns of conduct, not simply every isolated act of cheating.Adultery statutes and a recent repeal
| State | Published statutory rule | Important distinction |
|---|---|---|
| Arizona | Under § 13-1408, defined adultery is a Class 3 misdemeanor. | Qualifying unmarried participants are included. A spouse’s complaint is required to begin prosecution. |
| Florida | Under § 798.01, living in an open state of adultery is a second-degree misdemeanor. | The provision concerns living in open adultery; do not equate it with every secret encounter. |
| Kansas | Under § 21-5511, defined adultery is a Class C misdemeanor. | The text covers sexual intercourse or sodomy and includes an unmarried participant who knows the other person is married. |
| Maryland | Under Criminal Law § 10-501, adultery is a misdemeanor carrying a $10 fine on conviction. | This provision specifies a fine; it does not prescribe jail for this offense. |
| Michigan | Under MCL § 750.30, adultery is classified as a felony. | Definition, complaint requirements, and punishment rules must be read together; this section alone is not a sentencing guide. |
| New York | The enacted 2024 repeal of Penal Law § 255.17 removed the criminal adultery offense. | The repeal took effect on November 22, 2024. It did not resolve every divorce-related consequence. |
| Rhode Island | Under § 11-6-2, adultery carries a fine of up to $500. | The provision treats qualifying intercourse as adultery for both participants when either is married. |
| South Carolina | Under §§ 16-15-60 and 16-15-70, the statute provides criminal punishment for defined adultery. | The definition concerns cohabitation with intercourse or habitual intercourse without cohabitation. The penalty provision specifies a $100–$500 fine, six months to one year of imprisonment, or both. |
| Virginia | Under § 18.2-365, defined adultery by a married person is a Class 4 misdemeanor. | A Class 4 misdemeanor carries a fine rather than a jail sentence under the general misdemeanor penalty statute. |
| Wisconsin | Under § 944.16, defined adultery is a Class I felony. | The provision covers a married person and a person having intercourse with someone married to another. |
This is a ten-state reference, not a list of all states where adultery is punishable. It also shows why misdemeanor, felony, fine-only, and repealed rules should not be presented as interchangeable.
Does a statute on the books mean it is enforceable?
Not necessarily. Repeal is one question; constitutional validity and application are others. In Lawrence v. Texas, the Supreme Court invalidated the Texas law at issue concerning private consensual same-sex intimacy. The decision did not itself announce a nationwide repeal of every adultery statute.
An accurate answer therefore identifies the statutory text and checks relevant decisions. It should neither promise immunity because prosecutions are rare nor claim that every published offense is unquestionably enforceable in every situation.
Can you go to jail for cheating?
Criminal exposure depends on an applicable offense, its authorized punishment, and a legally supportable prosecution. Civilian adultery prosecutions are uncommon, but uncommon does not mean legally impossible.
A misdemeanor does not always carry jail time. Maryland’s cited adultery provision specifies a $10 fine. Under Virginia Code § 18.2-11, the Class 4 classification carries a fine of up to $250. South Carolina’s cited penalty provision, by contrast, includes imprisonment. A statutory maximum is not a predicted sentence. If police contact you about an allegation, obtain criminal-law advice before providing a substantive statement.
How can cheating affect divorce?
Criminal adultery laws and divorce rules serve different purposes. A spouse does not necessarily need a criminal conviction for affair-related evidence to matter in a family-law case.
Depending on the jurisdiction, key questions may involve grounds for divorce, entitlement to support, use of marital assets, or children’s welfare. Each issue needs its own analysis.
Divorce grounds and financial relief are different
Proving an affair is not always necessary to end a marriage. For example, the California Courts’ divorce guidance explains the state’s no-fault approach.
Even where fault grounds are available, choosing them is a procedural and strategic decision. Proving misconduct can require evidence, expense, and additional contested issues. An allegation’s emotional importance does not mean litigating it will improve the legal result.
Alimony: North Carolina and Virginia use different rules
North Carolina provides a specific example. Under G.S. § 50-16.3A, qualifying illicit sexual behavior before or on the date of separation can determine alimony entitlement.
In simplified terms, a dependent spouse’s qualifying conduct can bar alimony, while a supporting spouse’s qualifying conduct can require payment to a dependent spouse. If both engaged in it, the court has discretion. The statute also addresses condoned conduct; amount and duration remain separate questions.
Virginia provides another example. Under Virginia Code § 20-107.1(B), an established adultery ground in a spouse’s favor can bar permanent support payable by that spouse. The statute permits an exception where clear and convincing evidence establishes that denying support would cause manifest injustice, based on relative fault and economic circumstances.
These rules show why “cheating always cancels alimony” is too broad. Entitlement, exceptions, amount, and duration require separate attention.
Money spent on an affair may require a separate analysis
Proof of a relationship and proof of financial loss are different. Spending marital money on gifts, travel, or another household may raise a financial claim even where proving relationship fault is unnecessary to obtain a divorce.
For example, California Family Code § 1101 provides a claim for a spouse’s breach of fiduciary duty that impairs the other spouse’s interest in the community estate. Applying it to affair-related spending requires proof of the financial breach and resulting impairment, not simply proof that the affair happened.
Hypothetical example: A spouse suspects an affair and finds statements showing expensive gifts and hotel payments. A lawyer may need to evaluate whose money was used, when the spending occurred, whether it was authorized, and what remedy local law permits.
The practical evidence is a documented financial trail. Suspicion alone does not establish recoverable loss, and you should never present reimbursement as guaranteed.
Cheating does not automatically decide custody
Being unfaithful and being unable to parent safely are different findings. Courts consider the governing parenting standard rather than automatically awarding children to the spouse who did not cheat.
For example, North Carolina’s custody statute focuses on the child’s interest and welfare.
If an affair involved leaving a child unattended, exposing a child to danger, or disrupting necessary care, those facts may matter. The relevant connection is to the child’s welfare. Describe concrete incidents rather than assuming that moral blame settles the parenting question.
Can you sue the person who had an affair with your spouse?
Sometimes, local law recognizes an applicable civil claim. North Carolina is a useful example because its law expressly addresses alienation of affection and criminal conversation.
Despite its name, criminal conversation is a civil claim. It should not be confused with a prosecutor filing a criminal adultery charge.
Under North Carolina G.S. § 52-13, acts after the spouses physically separate with the required intent to remain permanently separated cannot give rise to these claims. The provision also sets a three-year limit measured from the defendant’s last act giving rise to the claim and restricts defendants to natural persons.
Those rules do not establish that every affair supports a successful lawsuit. The underlying claim’s elements, jurisdiction, evidence, defenses, and collectability still matter. Other states may not recognize these claims at all.
Ask a local lawyer about an existing claim and its deadlines before threatening litigation. A proposed repeal bill is not the same as an enacted repeal.
Does cheating count if you are separated?
Separation matters, but it does not have one universal effect. Living in separate homes does not, by itself, terminate a marriage.
Arizona and Virginia’s cited criminal provisions focus on marital status and defined sexual conduct. North Carolina’s cited civil-claim provision uses physical separation plus an intention that the separation remain permanent. Its alimony provision has its own timing rules.
That means three dates may need separate attention: when the relationship occurred, when the spouses separated, and when a final divorce took effect. A lawyer may also need to examine whether a court order existed and what it actually provided.
Do not assume that an informal statement such as “we are done” has the same effect as a divorce judgment or a legally recognized separation for every purpose.
Why military rules need separate attention
For people subject to military law, qualifying extramarital sexual conduct can be prosecuted under Article 134 of the Uniform Code of Military Justice. The Army’s official extramarital-conduct instructions identify the wrongful conduct, relevant marital status and knowledge, and the required effect on good order and discipline or the service’s reputation.
The instructions define covered sexual conduct more broadly than vaginal intercourse. They also identify circumstances such as misuse of government resources, effects on unit morale, and continuing conduct despite orders to stop.
An affair is not automatically a military conviction. Legal separation and mistake-of-fact defenses can require detailed analysis. A service member should obtain military defense advice; a civilian state-law answer does not settle the military question.
Is cheating on your spouse illegal in other countries?
The following comparisons concern consensual adult infidelity itself. They do not excuse coercion, abuse, or other independently unlawful conduct.
Canada
A private consensual affair is not ordinarily prosecuted as a standalone adultery offense in Canada. However, a blanket statement that adultery can never feature in criminal law overlooks a specific provision. Criminal Code § 172 addresses specified conduct in a child’s home, including adultery, where it endangers the child’s morals or makes the home unfit. The additional statutory conditions matter.
Separately, the federal Divorce Act recognizes adultery as one way to establish marriage breakdown under section 8. Section 15.2(5) excludes marital misconduct from spousal-support determinations under that provision. Provincial and territorial property issues require separate analysis.
India
In Joseph Shine v. Union of India, decided in 2018, the Supreme Court struck down the former criminal adultery provision in section 497 of the Indian Penal Code.
Adultery can still raise matrimonial issues under the applicable law. Decriminalization does not mean that every marriage-related consequence disappears. The marriage law governing the parties and any service-specific disciplinary rules must be checked separately.
United Kingdom
Consensual adult adultery itself is not a criminal offense in the UK. For England and Wales, Woolley & Co’s legal explanation distinguishes family-law issues from criminal penalties. Divorce procedures differ across the UK’s legal jurisdictions.
England and Wales use no-fault divorce under the Divorce, Dissolution and Separation Act 2020. The government’s explanation of the reform confirms that the process introduced on April 6, 2022, removed the need to prove fault such as adultery. The government divorce guide expressly directs readers to separate processes for Scotland and Northern Ireland.
Avoid treating a statement about divorce in England and Wales as a complete account of UK family law.
Australia
Private consensual adult adultery itself is not a criminal offense in Australia. Section 4 of the Human Rights (Sexual Conduct) Act 1994 protects private sexual conduct involving consenting adults from arbitrary interference. The Federal Circuit and Family Court’s divorce overview explains that divorce is based on marriage breakdown, not blame.
The court also makes clear that granting a divorce does not decide financial support, property division, or parenting arrangements. Those matters must be addressed separately; the no-fault divorce rule should not be used as a shortcut for answering every financial question.
What should you do if an affair may affect your legal rights?
Start with the outcome you need to understand: ending the marriage, obtaining support, protecting assets, arranging parenting, or responding to an allegation. That focus helps identify which evidence and legal rules are useful.Prepare for a useful legal consultation
- Identify the jurisdiction: Record where each spouse lives and where any case has been filed. Ask which laws govern each issue.
- Build a factual timeline: Note relevant relationship dates, financial transactions, separation, and existing court orders. Distinguish confirmed facts from suspicions.
- Preserve accessible records: Keep financial statements and communications you may lawfully possess. Preserve originals and context rather than edited selections.
- Check evidence collection first: Ask about recording, account access, tracking, and privacy rules before using surveillance.
- Ask about remedies and deadlines: Discuss whether proving adultery changes an available claim and whether the likely benefit justifies the expense.
Being married does not automatically authorize access to every private account or device. Avoid guessing passwords, impersonating another person, or installing tracking tools without legal advice. Lawful access and admissibility are separate issues.
Ask the lawyer a concrete question: “Which facts about this affair affect my case under this jurisdiction’s law?” If divorce also means returning to a former surname, TheLawLearner’s guide to the cost of changing your name explains the paperwork and expense to consider alongside the divorce process.
Conclusion
Is it illegal to cheat on your spouse? Sometimes, depending on the jurisdiction and the conduct. Some states retain criminal adultery provisions, while others have repealed them. Divorce, support, parenting, civil claims, and military rules each require a separate analysis.
Before acting, confirm the local rule, preserve relevant evidence lawfully, and identify the outcome you need. If an affair may affect a pending divorce, support claim, civil deadline, or criminal allegation, speak with an appropriately licensed lawyer about the specific facts.Frequently asked questions
Is adultery illegal in every U.S. state?
No. Some states retain criminal adultery provisions, and others have repealed them. A state’s criminal rule does not answer every divorce or civil-law question.
Can an unmarried affair partner commit adultery?
Under some statutes, yes. Arizona’s provision expressly includes an unmarried person who has sexual intercourse with a married person. Other jurisdictions use different definitions.
Is texting another person considered legal adultery?
Not automatically. The cited Arizona and Virginia provisions require sexual intercourse. Text messages may be evidence, but their significance depends on the claim and applicable law.
Does cheating automatically mean you lose alimony?
No nationwide rule provides that result. North Carolina has specific rules about qualifying illicit sexual behavior, dependent and supporting spouses, timing, and condonation. Other jurisdictions differ.
Can you sue an affair partner after separation?
The jurisdiction, claim, and dates matter. North Carolina’s section 52-13 excludes acts after physical separation with the required intent to remain permanently separated from giving rise to the named claims. Earlier acts require separate analysis.
Does an affair automatically cause loss of custody?
No. The governing parenting standard matters. Evidence connected to a child’s safety or welfare can be relevant, but infidelity alone does not establish an automatic custody outcome.
Can you legally date someone while separated?
There is no universal answer. Separation does not itself end the marriage. Criminal statutes, divorce rules, civil claims, and military defenses use different requirements. Check the rules that apply to your status and case before assuming dating has no legal effect.
Does permission from your spouse make adultery legal?
Do not assume so. The cited state criminal statutes focus on defined conduct and marital status rather than a general exception for an open marriage. Consent or condonation may matter to a particular family-law claim, but it is not a universal exemption.
Is adultery still a crime in New York?
New York repealed Penal Law section 255.17 in November 2024. The repeal concerned the criminal adultery provision; other legal issues must be evaluated separately.
