New Mexico Late Fee Laws: The Landlord and Tenant Guide

New Mexico just made its late-fee law stricter, and getting it wrong is now easier than ever. As of June 20, 2025, a residential late fee may not exceed five percent of the rent for each rental period the tenant is in default — half the old ten percent ceiling — after Senate Bill 267 amended New Mexico Statutes section 47-8-15. That single change is the anchor of this page: a fee that was perfectly legal in early 2025 can be an unlawful overcharge today. On top of the cap, the fee has to be written into the rental agreement, calculated on rent only, and noticed to the tenant by the last day of the next rental period, or it is waived.

This guide walks the full framework in plain English: exactly what the five percent cap limits and how it is measured, whether any grace period exists, the new notice deadline that can wipe out a late fee, when a fee may first be charged and why it must be in the written agreement, the separate worthless-check remedy, and the New Mexico-specific point that a valid late fee can travel with the rent in a three-day nonpayment notice under section 47-8-33. It also covers the special cases — mobile-home parks and subsidized housing — local rules, how a tenant contests an unlawful fee, a practical playbook for both sides, real scenarios, and a New Mexico FAQ.

Because the cap changed so recently, the safest posture for a landlord is to recalculate every late fee against the current five percent figure and to notice it on time, while the strongest position for a tenant is to know that anything above five percent of rent, based on the wrong figures, or noticed too late is not owed. Treat every figure here as a starting point and verify the current statute before you charge, pay, or dispute a fee.

Before diving into the mechanics, it helps to see exactly what New Mexico law controls. A late fee is not rent. It is a contractual charge the landlord seeks to add when rent arrives late, and New Mexico regulates that charge directly through the Uniform Owner-Resident Relations Act. Unlike states that leave late fees to a fuzzy reasonableness test, New Mexico picks a hard number: a percentage ceiling written into the statute itself.

So the narrow legal question in New Mexico is concrete: is this fee at or below five percent of the rent for the rental period, is it in the written agreement, and was it noticed on time? If yes on all three, the fee is enforceable up to that cap. If the fee exceeds five percent, is calculated on the wrong base, is missing from the agreement, or was noticed too late, it is not owed. Everything else on this page — the grace-period question, the pay-or-quit interplay, the special cases — sits on top of that three-part test.

This makes New Mexico easier to reason about than the states with open-ended standards, but it also creates a trap: the number moved. Because Senate Bill 267 lowered the cap from ten percent to five percent in mid-2025, a landlord relying on an old lease clause or an old online article can be charging double the lawful maximum without realizing the law changed. The rest of this guide keeps returning to that recent cut because it is the single most important fact about New Mexico late fees right now.

This is the heart of New Mexico late-fee law. Under New Mexico Statutes section 47-8-15, if the rental agreement provides for a late fee and the resident does not pay rent as agreed, the owner may charge a late fee not to exceed five percent of the rent for each rental period that the resident is in default. That is a firm ceiling. A landlord does not have to justify the fee as a reasonable estimate of harm the way a landlord in a no-cap state must; the landlord simply cannot go above five percent of rent for the period.

The critical development is that this number is new. Senate Bill 267, enacted in the 2025 regular session and effective June 20, 2025, amended section 47-8-15 to cut the maximum from ten percent to five percent. Before that date, a landlord could charge up to ten percent of rent as a late fee; on and after that date, the ceiling is half that. This is the override every landlord and tenant needs to internalize: a lease clause, a property-management policy, or an online guide that still says ten percent is out of date, and a fee set at the old rate is now an overcharge.

How the Cap Is Measured

The same reform confirmed the base for the calculation. Late fees are calculated on rent only. The rent used to compute the fee does not include deposits, additional fees, or utilities. So a landlord cannot inflate the base by adding a monthly utility charge or a pet fee to the rent and then take five percent of the larger figure — the five percent applies to rent alone. If the rent for a period is nine hundred dollars, the maximum late fee for that period is five percent of nine hundred dollars, computed on the rent and nothing else.

For ordinary residential rent, the answer is no. New Mexico Statutes section 47-8-15 does not give tenants a free window of days after the due date before rent is considered late. Rent is due at the time and place the rental agreement specifies, and if the agreement says rent is due on the first, it is late once that date passes. Any grace period a tenant enjoys comes from the written rental agreement, not from the state — a landlord who writes “rent is due on the first, with no late fee if paid by the fifth” has created a five-day grace period by contract, but the statute did not require it.

There is, however, a timing rule that works in the tenant’s favor at the other end: the notice deadline. Even though rent can be treated as late the day after it is due, the landlord cannot let a late fee sit indefinitely. To assess the fee at all, the owner must give written notice of the late fee no later than the last day of the next rental period. So while there is no cushion before rent is late, there is a hard stop on how long the landlord has to impose the fee.

New Mexico pairs its cap with a procedural protection that many tenants and even landlords overlook. Under New Mexico Statutes section 47-8-15, to assess a late fee the owner must provide notice of the late fee charged no later than the last day of the next rental period immediately following the period in which the default occurred. If the owner misses that deadline, the fee is waived for that default.

The practical effect is significant. A landlord cannot ignore a late payment for several months and then, at move-out or during a dispute, produce a stack of accumulated late fees for periods long past. Each late fee has its own clock: it must be noticed within the rental period that follows the missed one. If rent for one month is paid late and the landlord never notices a late fee by the end of the following month, the opportunity to charge that particular fee is gone.

For a tenant, this is a concrete defense. If a late fee shows up long after the month it relates to — especially bundled into a deposit deduction or a demand at the end of the tenancy — the tenant can ask whether the required notice was given within the statutory window. For a landlord, the lesson is discipline: notice each late fee promptly, in writing, within the next rental period, and keep proof of when and how the notice was given.

A late fee cannot appear out of thin air. To be enforceable at all, the fee must be provided for in the written rental agreement. The agreement has to say a late fee applies. A landlord cannot add a late fee the agreement never mentions, cannot spring one on the tenant mid-tenancy without a proper amendment, and cannot charge more than five percent of the rent even if a lease clause tries to authorize a larger number. If the agreement is silent on late fees, there is simply no late fee to collect.

Assuming the agreement does provide for a fee, timing follows the due date. Because New Mexico has no general grace period, the fee may attach once the rent is actually late under the agreement — the day after the due date if the agreement grants no cushion, or after any contractual grace period it does grant. But writing the fee into the agreement is only the first hurdle. The clause opens the door; the five percent cap and the notice deadline still decide whether the fee is enforceable and how large it can be. A lease that authorizes a ten percent fee does not make that fee valid — the statutory ceiling overrides the clause.

New Mexico authorises no flat returned-check service charge, and no statute lets a landlord bill one. Chapter 56, Article 14 of the New Mexico Statutes, titled Worthless Checks, contains exactly one section — New Mexico Statutes section 56-14-1, “Civil action; damages” — and it creates a lawsuit, not a fee a landlord may add to the ledger. New Mexico has no enacted Uniform Commercial Code collection-charge provision at section 55-3-506 either, so there is no statutory dollar figure for a returned rent check anywhere in New Mexico law. The only returned-check charge that can go on a tenant ledger is one the written rental agreement actually provides for, and that charge is contractual, not statutory.

Section 56-14-1 is also far narrower than an ordinary bounced check. It reaches only a worthless check, which section 56-14-1(E)(3) defines as a check issued in exchange for anything of value with intent to defraud, where the drawer knows at the time of issuing that there are insufficient funds. That same definition expressly excludes any check the payee knows about, has been expressly notified about, or has reason to believe was unfunded, and it excludes any postdated check. A rent check that simply bounces on an overdraft, and the very common postdated rent check, fall outside the statute. The intent and knowledge elements are not optional, and dishonor for insufficient funds is not by itself enough.

Where the statute does apply it reaches a landlord: it empowers “the plaintiff” in any civil action, and section 56-14-1(E)(2) defines a thing of value to include lodging. Section 56-14-1(A) then lets that plaintiff recover the greater of one hundred dollars or triple the amount of the check — but the figure is capped. Damages recovered under the section shall not exceed the amount of the check by more than five hundred dollars ($500). That ceiling controls on any check over $250, so on a $1,500 rent check the maximum recoverable is $2,000, not $4,500.

Damages may be awarded only if both preconditions in section 56-14-1(A) are satisfied: the plaintiff made written demand for the amount of the check not less than ten days before commencing the action, and the defendant failed to tender, before suit, an amount of money not less than the amount demanded. Section 56-14-1(B) then dictates the demand itself. It must give notice that triple damages may be incurred if the money is not paid within ten days, and it must be sent by certified mail to the defendant’s last known address, with a return receipt requested and marked deliver to addressee only. A demand that skips the ten-day warning, the certified mail, or the addressee-only marking does not support an award.

Two further subsections cut the landlord’s leverage. Under section 56-14-1(C), after the action is filed but before the hearing the defendant may tender, as satisfaction of the claim, an amount equal to the check plus the incurred court and service costs, which extinguishes the triple-damages exposure. Under section 56-14-1(D), if the court or jury determines the failure to satisfy the check was due to economic hardship resulting from an inevitable accident or act of God, it may waive all or part of the statutory damages, though judgment must still enter for not less than the amount of the check plus court and service costs. Section 56-14-1 has stood unamended since Laws 1987, chapter 14, section 1.

Keep two things separate. A damages award under section 56-14-1 is entered by a court after a demand and a lawsuit; it is not a service charge, and a landlord may not post triple damages to a rent ledger or fold them into a pay-or-quit notice. And a lease-based returned-check fee is purely contractual: it must appear in the written rental agreement, and even then it cannot be used as a workaround to push total late charges past the five percent late-fee cap.