Ordinary rules: tenancy in common by default, joint tenancy needs clear words
A New Mexico deed transferring real estate to more than one new owner creates a tenancy in common by default, unless it clearly states a different form of ownership. A deed creates a joint tenancy if it transfers property to two or more owners "as joint tenants," "to the survivors of them and the heirs and assigns of the survivor," or "with right of survivorship." New Mexico does not recognize tenancy by the entirety at all.
The twist for married couples: it may also be community property
Here's where New Mexico genuinely diverges from most states. Under NMSA § 40-3-8, a 1984 amendment established that marital property acquired through an instrument designating the spouses as joint tenants is presumed to be community property — even though that same property may simultaneously carry the right of survivorship that comes from being titled as joint tenants. In other words, the deed's "joint tenants" language doesn't settle the classification question on its own; New Mexico law can layer a community-property characterization directly on top of it.
The case that proved it: In re Fingado
A real New Mexico Supreme Court case, answering a certified question from the Tenth Circuit, shows exactly what this dual classification can mean in practice. A husband and wife had acquired two properties years earlier, both conveyed to them "as joint tenants." When the husband later filed for individual bankruptcy, his wife argued the properties weren't community property — and so shouldn't be swept into his bankruptcy estate, since they were titled as joint tenancy property instead. The court disagreed. It held that the 1984 presumption applied: the properties were community property, even though they were also, simultaneously, joint tenancy property. As a result, the full value of both properties was exposed to the husband's individual bankruptcy estate — not just his nominal joint-tenancy share.
Why the dual classification exists at all
This isn't simply a legal technicality without a purpose. New Mexico's community property system is meant to reflect that property acquired during a marriage generally belongs equally to both spouses, regardless of whose name appears on the deed or how the title is worded. The 1984 amendment closed a gap where couples might otherwise use joint tenancy titling specifically to try to sidestep community property's rules — the presumption ensures that marital property retains its community character by default, while still letting the survivorship feature of joint tenancy operate on top of it.
A real advantage: bypassing the will entirely
This dual classification isn't purely a downside. Under NMSA § 45-2-807, community property that is also joint tenancy property is specifically excluded from the decedent's testamentary disposition — meaning it bypasses the will entirely and passes directly to the surviving spouse through survivorship, on top of the ordinary community-property split that would otherwise apply. For a married couple planning to leave everything to each other, this dual status can actually work cleanly in their favor.
Both spouses generally need to sign
New Mexico law requires both spouses to sign a deed transferring real estate held as community property — even if only one spouse's name appears on the title. Both co-owners must also join in a deed transferring real estate they jointly own, whether as tenants in common or joint tenants, even if that property isn't community property at all. A married owner can transfer individually owned, truly separate property without the other spouse's signature, but community property and jointly owned property both require both signatures.
A separate, more modern tool for real estate
None of this changes the fact that New Mexico also offers a completely separate route for keeping real estate out of probate. See our guide to the New Mexico transfer-on-death deed for how that tool works alongside these ownership rules.