New Mexico property tax by county

Property tax rate by county in New Mexico

Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020-2024), tables B25103 and B25077.

Why county rates vary so much

Property tax is set locally, not by the state, so the rate depends on the county, city, school district, and special districts where a home sits, and on how those local budgets compare to local home values. A county with low home values can still have a high effective rate if its local budgets are large, and a wealthy county can have a low effective rate. The effective rate shown here is the median tax bill divided by the median home value, which is the standard way to compare places; your own bill depends on your assessment and any exemptions.

For New Mexico's income and retirement taxes, see New Mexico income tax and New Mexico retirement taxes.

How does New Mexico assess homes for property tax?

New Mexico assesses homes at 33.33% of market value, the same in every county. New Mexico does not tax the full market value of a home. The assessor sets a market value and only one third of it becomes the taxable value that mill rates apply to. On top of that, residential value is capped: the value used for taxes cannot rise more than about 3% a year. The cap does not apply in the first year a home is on the roll, to improvements you add, or in the year after the home changes hands, when the value resets to current market. That reset on sale is why two identical neighboring homes in New Mexico often carry very different bills.

There is no single statewide reappraisal year. Each county assessor must reappraise either annually or every two years, and can only switch cycles with written approval from the state. All property is valued as of January 1 and assessors mail notices of value around April 1. For most homeowners the schedule matters less than the 3% cap, since a reappraisal cannot push a long-held home's taxable value up faster than the cap allows.

Is there a homestead exemption in New Mexico?

Yes. New Mexico has a homestead exemption of $2,000, applied to taxable value, for a New Mexico resident who qualifies as a head of family. Read this amount carefully. The $2,000 comes off taxable value, which is already only one third of market value, so it shelters the equivalent of roughly $6,000 of market value and saves about $2,000 times your local mill rate, often $50 to $90 a year. Head of family means a New Mexico resident who is married (only one spouse may claim it), widowed, a head of household supporting a relative, or a single person. You may claim it only once a year and in only one county. The amount is not adjusted for inflation and has stayed at $2,000 since 1993.

Other state relief for homeowners:

• Seniors and disabled owners: New Mexico's main senior break is a valuation freeze rather than a dollar exemption. An owner who is 65 or older, or blind or permanently disabled at any age, and who occupies the home as a single-family dwelling can have its valuation frozen at the level it carried in the year they qualified and applied. Income is the gate: modified gross income in the prior year must not exceed a limit the state recalculates for inflation annually, set at $44,200 for the 2026 tax year. Apply to the county assessor within 30 days of your notice of valuation; after three consecutive years of proving income eligibility the assessor keeps applying it automatically.
• Disabled veterans: The veteran exemption is now a moving number, which is why no fixed figure is shown. Voters approved a constitutional amendment in November 2024 raising it from $4,000, and the implementing law set it at $10,000 of taxable value for 2025, then adjusted for inflation every year after, rounded down to the nearest $100 and never allowed to fall. The state calculates the figure and sends it to every county assessor by December 1, so the current amount comes from your assessor rather than the statute. Separately, from the 2026 tax year a disabled veteran's principal residence is exempt in proportion to their federal disability rating, so a 70% rating exempts 70% of the home and a 100% rating exempts all of it.
• There is no separate owner-occupancy credit; the head-of-family exemption is the only general homeowner break. The relief that actually moves the needle for most long-term owners is the 3% annual cap on residential taxable value, and for qualifying low-income owners 65 or older or disabled, the valuation freeze above.

New Mexico sets these rules and each county's property tax office applies them, which is where the application, the filing deadline and the form come from. Some counties add programs of their own; where we have checked a county, its page lists them.

When are property taxes due in New Mexico?

County treasurers mail bills around November 1. Tax is payable in two equal installments, the first due November 10 and the second due April 10 of the following year. You get a one month grace period on each: interest starts if the first half is not paid by December 10 or the second half by May 10.

New Mexico splits the bill into 2 installments. That is the state rule. Each county issues and collects its own bill, so the dates printed on your statement are the ones that bind you.

How do you appeal a property assessment in New Mexico?

You contest the assessed value with the the county valuation protests board, reached by petitioning the county assessor. The filing deadline is typically 30 days after the assessor mails your notice of valuation. File a written petition with the county assessor within 30 days of the mailing date on your notice, whether you are disputing value, classification, or the denial of an exemption or the senior freeze. The assessor schedules you before the county valuation protests board, a three-member panel independent of the assessor, and you get at least 15 days notice of the hearing. Many protests settle first at an informal, off-the-record conference with appraisal staff. The assessor's valuation is presumed correct, so the burden is on you to bring evidence, and a board decision can be appealed to district court within 30 days.

New Mexico property-tax rules from primary state sources (revenue department and statute), reviewed September 7, 2026. Exemption amounts and credits change; confirm the current figures with your county assessor. Sources: assessment, exemptions, due dates, appeals.