A contract is no more than an agreement to do (or not to do) something. Marriage is a contractual relationship, even though the "terms" of the contract are rarely stated explicitly or even known by the marrying couple. Saying "I do" commits a couple to a well-established set of state laws and rules governing, among other things, the couple's property rights if they split up or when one of them dies.

Unmarried couples, on the other hand, do not automatically enter into a contract when they start a relationship. If you want to legally establish how you will own property during your relationship, as well as what will happen if you separate or if one of you dies, you must write out your own rules. (Married couples do something similar when they create a premarital agreement. Your agreement will be legally called a "nonmarital agreement," but we prefer the term "living together contract.")

Some couples find it unromantic or depressing to even think about making a contract governing mundane details like money and property, particularly if doing so involves thinking about what might happen in the event of separation. But preparing a sound living together agreement can help you in a whole host of ways. Practically speaking, your agreement will help you avoid trouble when you mix your money and property, and it will make clear your intentions and expectations regarding property ownership, household expenses and the like. It can also greatly ease the division or distribution of property after a breakup or death. On a more personal note, the process of negotiating and drafting your agreement may well strengthen your abilities to communicate with and understand each other.

That said, here's an overview of the legal rules and practical concerns you should think about before drafting a contract of your own.

Legal Rules Governing Living Together Contracts

For the most part, courts and judges -- not legislatures -- have made the legal rules governing living together contracts. The leading court case is the well-known Marvin v. Marvin, 557 P.2d 106, decided by the California Supreme Court in 1976. It involved the actor Lee Marvin and the woman he lived with, Michele Triola Marvin. (She used his last name even though they weren't married.) In its decision, the court announced what were to become the common legal principles governing the right of unmarried couples to make contracts. First, the court ruled that marital property laws do not apply to couples who are not legally married. Then, the court recognized that unmarried couples are here to stay. Finally, the court declared four contract principles:

• Unmarried couples may make written contracts.
• Unmarried couples may make oral contracts.
• If a couple hasn't made a written or oral contract, the court may examine the couple's actions to decide whether an "implied" contract exists.
• If a judge can't find an implied contract, she may presume that "the parties intend to deal fairly with each other" and find one partner indebted to the other by invoking well-established legal doctrines of equity and fairness.

Although Marvin directly applies only in California, other states have upheld the application of these principles to contracts made by unmarried partners -- both straight and gay. Depending on the state, however, a court may follow different legal rules. Almost all states now enforce contracts between unmarried partners, although in some states only written contracts will be enforced.

When You Need a Living Together Contract

Obviously, you don't need a contract if you are in a brief relationship. But in a long-term and serious partnership, whether you're basking in the glow of having just "joined forces" or you've been together 20 years, you should consider the legal consequences of dealing with money and property. If you are planning to mix assets or share expenses, you should most definitely put your agreement in writing, especially if a significant amount of money is involved. If you're both stone-broke, with no property and little prospect of getting any soon, you can still benefit by deciding how you will handle money and property if it ever arrives. Also, you can put more emphasis on the practical issues of day-to-day living together, such as how expenses will be paid.

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