What to Know About Common-Law Marriage in Michigan
What to Know About Common-Law Marriage in Michigan
If you’ve been in a long-term relationship and live together, you might have heard people say things like “we’ve been together so long, we’re basically common-law married.” It’s a phrase that gets tossed around a lot, but in Michigan, it’s important to know that common-law marriage isn’t legally recognized—at least not the way many people think. Let’s start with the basic truth: Michigan does not allow couples to form a common-law marriage within the state. This has been the case since 1957, when Michigan formally abolished the practice. That means no matter how long you’ve lived together, shared bills, or acted like a married couple, the state won’t consider you legally married unless you actually went through the formal process—license, ceremony, and all.
That said, there’s one exception that can still come into play. Michigan does recognize common-law marriages that were legally established in other states. So if you and your partner lived in a state that does allow common-law marriage (like Colorado, Iowa, or Texas), and you met all their legal requirements before moving to Michigan, then Michigan may honor that relationship as a legal marriage. But it has to be valid under that other state’s laws first. You can’t just move to Michigan and decide to call yourselves common-law married—it doesn’t work that way.
Now, just because Michigan doesn’t recognize common-law marriage doesn’t mean that unmarried couples don’t face legal questions when things change—especially if the relationship ends. You might share a home, a car, even children. You might have invested in property together or supported each other financially for years. So what happens when one person wants to move out, or you’re not sure how to divide things?
Unfortunately, it’s not as simple as “we’ll just do what married couples do.” Michigan’s family law system offers certain rights and protections to married couples—like equitable property division, spousal support, or inheritance rights—but those don’t automatically apply to couples who never got married. That can leave one partner in a vulnerable spot if they don’t have legal agreements in place.
For example, let’s say you’ve been living in your partner’s house for 10 years, contributing to the mortgage, helping with renovations, paying utilities. If your name isn’t on the deed or mortgage, you may not have any legal claim to that property if the relationship ends. That surprises a lot of people. You might feel like you’ve built a life together—and emotionally, you have—but under Michigan law, property rights aren’t based on how long you’ve been together or how much effort you put in unless you’re legally married or have a specific contract in place.
The same goes for things like jointly purchased vehicles, shared bank accounts, or even debts. If there’s no written agreement, you could find yourself in a difficult situation trying to prove who owns what or who should be responsible for certain payments. And courts don’t handle property division for unmarried couples the same way they do for divorcing spouses. In fact, many of these disputes end up being handled as basic civil cases—not family law cases—because the law sees them as contract or property issues, not marital ones.
This is why many long-term, unmarried couples in Michigan are starting to take legal steps to protect themselves. Some choose to create cohabitation agreements. These are legally binding contracts between partners that outline how property, finances, and responsibilities will be handled during the relationship—and what happens if it ends. It’s essentially like a prenup, but for couples who don’t plan to get married. It doesn’t mean you’re expecting the relationship to fail—it just means you’re being realistic about protecting yourselves and avoiding legal confusion later on.
Another issue that comes up a lot is inheritance. If you’re not legally married and don’t have a will, your partner is not automatically entitled to anything from your estate. In Michigan, intestate succession laws (those that apply when someone dies without a will) give priority to legal spouses and blood relatives—not long-term partners. That means if something unexpected happens, your partner could be left out completely unless you've made formal arrangements through a will, trust, or beneficiary designation.
Child-related issues are a whole different area. If an unmarried couple has a child together, there are still legal steps that need to be taken to establish paternity and parental rights. The mother is automatically considered the legal parent, but the father’s rights are not guaranteed unless paternity is legally established. Without it, the father may not have custody or parenting time rights, and he may not be responsible for child support either. It’s a critical step that unmarried parents need to be aware of, especially if they separate or one parent wants to move out of state.
So where does all of this leave you if you’re in a committed relationship, living together, and building a life without a marriage license? The good news is, you still have options. With the right legal planning—like cohabitation agreements, estate planning, and clear documentation of property—you can protect yourself and your partner, even if the law doesn’t view your relationship the same way it views a marriage.
If you’ve been with your partner for years and just assumed that your relationship would be legally recognized, you’re not alone. A lot of people find themselves surprised by what the law does—and doesn’t—cover when it comes to long-term, unmarried relationships. The key is being proactive. It’s not about being pessimistic or distrusting your partner—it’s about protecting both of you and avoiding unnecessary conflict in the future.
At Coppins Law Group, we’ve worked with many Michigan couples who are navigating these questions. Whether you’re just moving in together, planning for the future, or trying to untangle things after a breakup, we’re here to help you understand your rights and make informed decisions. Every situation is unique, and we’ll work with you to find solutions that fit your specific needs.
If you have questions about your rights as an unmarried partner or want to explore creating legal agreements to protect yourself, reach out to schedule a consultation. We’ll walk you through your options, explain what makes sense for your situation, and help you feel more secure—no matter where your relationship goes next.
Just a reminder: this blog is meant for general information only. It’s not legal advice, and it’s not a substitute for meeting with an attorney. If you’re facing a legal issue, your best next step is to talk with a lawyer who can look at your specific situation and guide you from there.

