Adultery Laws in Iowa (2026): What Cheating Actually Costs You

Finding out your spouse had an affair is devastating. And your first question is often the same one everyone asks: Does this change anything legally?

The answer in Iowa is more complicated than a simple yes or no. Here’s everything you need to know.

What Is Adultery?

Adultery means a married person has sexual relations with someone who is not their spouse. It goes by many names: cheating, infidelity, an affair, or extramarital relations. They all mean the same thing.

So simple! But here’s where Iowa gets interesting. The law here treats adultery very differently than most people expect.

Is Adultery Illegal in Iowa?

Short answer: No. Adultery is not a crime in Iowa.

This surprises a lot of people. Many states still have criminal adultery laws on the books. Iowa does not. Honestly, this is one of the more progressive stances Iowa took decades ago.

Iowa used to criminalize cheating. It was even called the “Iowa Homewrecker Law.” But the law changed in the 1970s. Since then, you cannot face criminal charges simply for cheating on your spouse.

You also cannot sue your spouse’s affair partner in Iowa. Some states allow what are called “alienation of affection” lawsuits. These let you take the other person to civil court. Iowa abolished those too. Here, the affair partner faces zero legal consequences under state law.

Iowa Is a No-Fault Divorce State

Okay, pause. Read this carefully. This is the most important thing to understand.

Iowa is what lawyers call a “no-fault” divorce state. That means when you file for divorce, you cannot legally blame the other person. You cannot cite cheating, cruelty, abuse, or anything else as the reason.

Under Iowa Code Section 598.17, the only legal ground for divorce is that the marriage has broken down beyond repair. That’s it. The court does not care whose fault it is.

Iowa eliminated fault-based divorce grounds in the 1970s. It is now one of roughly 17 states that are purely no-fault. You’re not alone in finding this frustrating. Most betrayed spouses do.

Confused about what this means for you? Let me break it down.

It means proving your spouse cheated will not automatically get you more money, more alimony, or custody of your kids. The affair itself is not the deciding factor. What matters is the financial and practical impact of that affair.

Can Adultery Affect Property Division?

Here’s where things get serious. Adultery can indirectly affect how assets are divided. But it works in a specific way.

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Iowa divides marital property using what is called “equitable distribution.” Equitable means fair, not necessarily equal. Judges look at nine specific factors listed in Iowa Code Section 598.21. Marital fault is not one of those factors.

But wait, there’s more to know.

If your spouse spent marital money on the affair, that changes things. Think hotel stays, vacations, jewelry, gifts, or fancy dinners paid with shared funds. Courts call this “dissipation of assets.” It basically means one spouse wasted joint money for personal benefit.

When a judge finds dissipation happened, they can compensate you. They might give you a larger share of remaining assets to make up the difference. The Supreme Court of Iowa has ruled that courts can award the depleted assets to the spouse who spent them, while giving an equal-value asset to the other spouse.

Pretty straightforward, right? But you need proof. Bank records, credit card statements, receipts, and testimony all help build your case.

Does Cheating Affect Alimony?

Many people assume a cheating spouse should pay more alimony. That feels fair. But Iowa law does not see it that way.

Under Iowa Code Section 598.21A, marital misconduct has zero impact on spousal support. The Iowa Court of Appeals confirmed this in a 1985 case. The ruling said moral considerations should not override the financial analysis that drives alimony decisions.

Basically, alimony is about financial need and ability to pay. It is not about punishment. Whether your spouse cheated has no direct effect on the amount or length of support.

That said, if the affair drained marital finances, that financial picture does matter. It’s just the spending that counts, not the affair itself.

Does Adultery Affect Child Custody?

Here’s what you need to know if kids are involved.

Iowa courts decide custody based on the best interests of the child. Full stop. A parent’s affair alone is not a factor in that decision under Iowa Code Section 598.41.

Most of the time, judges won’t hold cheating against a parent in a custody case. The affair doesn’t make someone a bad parent in the eyes of the law.

There are exceptions, though. If the affair partner poses a real risk to your children, that matters. Say the new partner has a criminal record or a history of substance abuse. That’s relevant. Or if the parent’s behavior during the affair directly harmed the kids, a judge may consider that too.

Wondering if this applies to your situation? Talk to a family law attorney. Every case is different.

What Is Dissipation of Assets and How Do You Prove It?

Dissipation of assets is when one spouse wastes or hides marital money. For affairs, it usually means spending shared funds on the affair partner.

A friend asked me about this last week. She had screenshots of her husband’s credit card charges at hotels and restaurants she never went to. Turns out, those records were exactly what her attorney needed.

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To prove dissipation in Iowa, you’ll want to gather several things. Bank and credit card statements showing unusual spending are key. Receipts for trips or gifts help too. You can also use text messages, emails, and social media posts as evidence.

Hold on, this part is important. Courts look at timing. Spending that happened after the marriage started falling apart carries more weight than spending from years earlier. Courts also look at whether the spending benefited both spouses or just one.

The cheating spouse may need to explain those expenses. If they can’t justify them, a judge can account for the missing money when dividing assets.

What About Common Law Marriage in Iowa?

Iowa is one of the few states that still recognizes common law marriage. This means two people can be legally married without a ceremony or license. They need to agree they are married, live together as spouses, and present themselves to the public as a married couple.

Why does this matter for adultery? Because if a common law marriage exists in Iowa, all the same divorce rules apply. The adultery laws, the no-fault rules, the property division rules. All of it.

Think of it like a regular marriage, but without the paperwork. Same rules, same protections.

The Old Homewrecker Law: A Bit of History

Iowa used to have some of the toughest cheating laws in the country. The “Iowa Homewrecker Law” made adultery a criminal offense. It also allowed lawsuits against the person who had an affair with your spouse.

Until the 1970s, cheating on your spouse in Iowa could land you in legal trouble. But as attitudes shifted and no-fault divorce became the norm, Iowa wiped those laws from the books. Other states have kept similar laws. As of 2026, six states still allow “homewrecker” lawsuits. Iowa is not one of them.

Personally, I think Iowa made the right call. These laws were rarely enforced and often used unfairly.

How to Protect Yourself Financially

This one is probably the most important section for people going through this right now.

If you suspect your spouse is having an affair and spending marital money, act quickly. Start documenting everything. Pull bank statements going back at least a year. Review credit card accounts. Look for spending patterns that seem out of the ordinary.

You should also consider separating joint accounts if divorce seems likely. Talk to a bank or financial advisor about what is legally safe to do before the divorce is filed. Once a divorce is started, both spouses have duties not to waste marital assets.

Do not move large amounts of money or hide assets. That can seriously backfire in court. The goal is to protect what is yours, not to take more than your fair share.

How to Start a Divorce in Iowa

Filing for divorce in Iowa starts with submitting a petition to your county’s district court. Iowa Code Section 598.5 sets out the requirements. If you lived in Iowa for at least one year, you meet the residency rule. If your spouse lives in Iowa and is served with papers, there is no waiting period for residency.

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After filing, Iowa has a 90-day waiting period before a divorce can be legally finalized. This gives both sides time to negotiate property, support, and custody.

If children are involved, you may be required to take a parenting education course within 45 days of filing. The court may also order mediation if the divorce is contested.

You can file on your own, but working with a family law attorney is strongly recommended. Especially if your spouse spent marital assets on an affair. An attorney can help you make that case in court.

Frequently Asked Questions

Is cheating illegal in Iowa?

No. Iowa removed criminal adultery laws in the 1970s. Cheating is not a crime in Iowa.

Can I use adultery as grounds for divorce in Iowa?

No. Iowa is a no-fault divorce state. You can only file on the grounds that the marriage has irretrievably broken down.

Does my spouse’s affair affect how assets are divided?

Not directly. But if your spouse spent marital money on the affair, a court can account for that in the property division.

Can I sue my spouse’s affair partner in Iowa?

No. Iowa does not allow alienation of affection or criminal conversation lawsuits against a third party.

Does cheating affect child custody in Iowa?

Generally no. Custody is based on the best interests of the child. The affair may matter if the new partner poses a risk to the kids.

What is dissipation of assets?

It means one spouse wasted marital money for personal gain. In affair cases, that usually means spending shared funds on the affair partner.

Does adultery affect alimony in Iowa?

No. Iowa courts do not consider marital fault when deciding spousal support. It is based purely on financial need and ability to pay.

Final Thoughts

Here’s the bottom line. Iowa does not punish cheating directly. There are no criminal charges, no homewrecker lawsuits, and no automatic boost to your divorce settlement just because your spouse had an affair.

But that doesn’t mean the affair has no impact. If money was spent, courts can and do account for it. If children were put at risk, courts will look at that too.

Now you know how Iowa actually handles adultery. Stay informed, document everything, and if you’re going through this, lean on a qualified Iowa family law attorney. You don’t have to figure this out alone.