New Mexico ties the deposit cap to the length of the lease rather than to the unit, and attaches an interest obligation to anything above the base. Albuquerque portfolios running mixed lease terms hit both rules at once.

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New Mexico rules that apply here
Under 47-8-18 the deposit is limited to one month's rent for agreements of a year or less. For longer leases the statute does not set the same fixed ceiling, but where a landlord collects more than one month's rent the landlord must pay the tenant annual interest on the portion exceeding one month. So taking a larger deposit is permitted in the right circumstances and it converts a static liability into an accruing one.
That splits a single deposit into two components with different treatments: the base month, which sits as an ordinary trust liability, and the excess, which accrues interest payable annually. A ledger holding one figure per tenant cannot compute the obligation, because the accrual applies only to the part above the threshold.
The return clock is 30 days from termination of the rental agreement or the resident's departure, whichever is later, with an itemised written list of deductions and the balance. Portfolios assuming the clock starts at move-out are using the earlier of the two dates rather than the later one, which is the safer error but still the wrong rule.
New Mexico 47-8-18 ties the cap to LEASE LENGTH rather than to the unit: one month's rent for agreements of a year or less. The itemised written list of deductions and the balance are due within 30 days of termination of the rental agreement or the resident's departure, WHICHEVER IS LATER, so assuming the clock starts at move-out uses the earlier date.
Where a landlord collects more than one month's rent, annual interest is owed to the tenant on the portion EXCEEDING one month. That splits a single deposit into two components with different treatments: the base month as an ordinary trust liability, and the excess as an accruing one. A ledger holding one figure per tenant cannot compute the obligation, and because the threshold is one month's RENT, a rent increase shrinks the excess without the deposit changing.
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One month's rent for agreements of a year or less. On longer leases more is possible, but anything above one month's rent carries an obligation to pay the tenant annual interest on the excess.
As two components. The base month is an ordinary trust liability; the excess accrues interest payable annually. One combined figure per tenant cannot compute the obligation.
At termination of the rental agreement or the resident's departure, whichever is LATER. Assuming move-out starts it uses the earlier date.
Other New Mexico markets, the platforms we work in, and the functions available on their own.
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