Written/Reviewed By:
Barry S. Kantrowitz, Esq.Last Updated: Apr 9, 2026
Read Time: 4 mins
New York law allows you to file for divorce based on adultery. But does proving your spouse cheated actually change the outcome of your case? The answer might surprise you. Most people assume adultery will swing everything in their favor. The reality is more complicated. Understanding when infidelity matters can help you make smarter decisions during your divorce.
New York’s Fault And No-Fault Divorce Options
Since 2010, New York has offered no-fault divorce. You can end your marriage simply by stating it has broken down irretrievably for at least six months. You don’t need to prove your spouse did anything wrong. Before no-fault divorce existed, adultery was one of the few grounds available. Today, it remains an option, but filing on fault grounds requires proof. You’ll need evidence like text messages, photos, witness testimony, or other documentation showing your spouse had an extramarital affair. The question becomes: why would you take that route when you can file no-fault?
When Adultery Doesn’t Matter
New York uses equitable distribution for property division. Courts divide marital assets fairly, not necessarily equally. But fair doesn’t mean the cheating spouse gets less. Adultery generally has no impact on:
- Division of marital property
- Division of retirement accounts or pensions
- Distribution of real estate or other assets
- Spousal maintenance (with rare exceptions)
Judges focus on financial factors like income, earning capacity, length of marriage, and contributions to marital assets. Your spouse’s affair isn’t part of that calculation. The same applies to child custody. New York courts decide custody based on the child’s well-being. A parent’s adultery doesn’t automatically make them unfit. Unless the affair directly harmed the children or showed poor judgment affecting parenting, it won’t influence custody decisions.
When Adultery Can Matter
There are specific situations where proving adultery makes a difference.
Wasteful Dissipation Of Assets
If your spouse spent significant marital funds on their affair, you might recover those losses. This is called dissipation. Examples include:
- Paying for hotel rooms or vacations with the other person
- Buying expensive gifts for their lover
- Using joint credit cards for affair-related expenses
You’ll need records showing where money went and when. The spending must be substantial enough to warrant court attention.
Impact On Spousal Support
In rare cases, adultery can affect maintenance awards. If your spouse’s affair involved spending down marital assets or caused economic harm, a judge might consider it when determining support. Under New York Domestic Relations Law Section 236, courts can consider the circumstances of the case when awarding maintenance. Egregious conduct involving financial waste might factor into that decision.
Strategic And Emotional Considerations
Some people file on fault grounds because it matters to them personally. Naming adultery in divorce papers puts the issue on record. It can also create pressure during settlement negotiations. A Rockland County divorce lawyer can help you weigh whether this approach serves your interests. Sometimes it does. Often, it just extends the process and increases legal costs without changing the result.
What You Need To Prove Adultery
If you choose to file based on adultery, you’ll need solid evidence. Your word alone isn’t enough. Courts require proof showing your spouse engaged in a sexual relationship with someone else during the marriage. Acceptable evidence includes text messages, emails, photographs, credit card statements showing suspicious charges, hotel records, or testimony from witnesses. You can’t use evidence obtained through illegal means like hacking accounts or recording private conversations without consent.
The process becomes adversarial quickly. Your spouse will likely fight the allegations, especially if they know adultery won’t affect the financial outcome anyway. Kantrowitz, Goldhamer, Graifman, Perlmutter & Carballo, P.C. helps clients throughout New York understand their options and build strong cases. Whether you’re dealing with infidelity, financial disputes, or custody concerns, experienced legal guidance makes a significant difference.
Making The Right Choice For Your Case
Most divorces in New York now proceed on no-fault grounds. It’s faster, less expensive, and focuses on moving forward rather than assigning blame. You can still feel angry about your spouse’s affair while choosing the more practical path. However, if your spouse spent large amounts of marital money on their relationship or if documenting the adultery serves a specific legal purpose, filing on fault grounds might make sense. The decision depends on your particular situation and goals.
If you’re facing divorce and your spouse’s adultery is a factor, talk to a Rockland County divorce lawyer who can assess your specific circumstances. The right strategy depends on the details of your case, not assumptions about how courts treat adultery. Getting clear, honest advice early helps you avoid costly mistakes and move toward a better outcome.
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