What is the property tax rate in Otero County?

The combined effective property tax rate in Otero County, New Mexico is approximately 0.60%.

Otero County Property Tax Calculator (2026) — New Mexico Property Tax Almanac

Property Tax in Otero County, 2026

A calculator and field guide for Alamogordo-area homeowners — and for anyone considering a move to Otero County — including New Mexico's 33.33% assessment ratio (taxable value = 1/3 of FMV), the universal $2,000 Head of Family Exemption, the unique Yield Control formula (limits annual revenue growth to inflation, capped at 5%), the 3% annual residential AV cap (NM Const. Art. VIII), the 20-mill constitutional rate cap, the Senior Valuation Freeze (true 0% increase for 65+ at or below ~$44,200 income), the $10,000 universal Veteran Exemption (raised from $4,000 in 2025), the FULL Disabled Veterans Exemption (100% service-connected, NMSA §7-37-5.1), and the NEW Proportional Disabled Veteran Exemption (10-99% rating, effective 2026 per Constitutional Amendment 1). Effective rates ~0.55-0.85% statewide median (~0.63% per Tax Foundation).

Otero County operates under New Mexico's 33.33% taxable-value system. Property is valued at FMV, taxable value = 1/3 × FMV, then tax = taxable value × millage / 1,000. Combined millage typically 25-40 mills (~0.83-1.33% gross before exemptions). NM's structural protections — the Yield Control formula (revenue-growth cap), constitutional 3% annual residential AV cap, $2,000 Head of Family Exemption, Senior Valuation Freeze (true 0%), and one of the most generous veteran exemption structures in the US — combine to keep effective rates ~0.55-0.85% statewide.

How the bill is built

The Otero County New Mexico Assessor determines FMV annually as of January 1. Taxable value = FMV × 1/3 (so a $300K home has TV = $100K). Subtract $2,000 Head of Family Exemption (NMSA §7-37-4) for NM resident heads of household. Tax = TV × millage / 1,000. Otero's combined millage is ~18 mills (~0.60% effective post-exemption). Veterans get an additional $10,000 exemption (raised from $4,000 by HB 47 in 2025); 100% disabled vets are FULLY exempt (no income or value cap).

NM's Yield Control formula (NMSA §7-37-7.1) caps revenue growth from existing properties. When valuations rise sharply, mill rates auto-adjust DOWNWARD to prevent windfall revenue. Combined with the constitutional 3% annual residential AV cap (resets at sale — the "tax lightning" issue confirmed in Zhao v. Montoya 2014), it produces one of the most stable property tax bills in the US for long-term homeowners.

NM is among the most generous US states for veteran property tax relief. Three tiers: (1) Universal Veteran Exemption — $10,000 taxable-value reduction for any honorably discharged NM resident vet (raised from $4,000 in 2025 by HB 47); (2) 100% Service-Connected Disabled — FULL exemption on principal residence, no income or value cap; (3) NEW Proportional Disabled Veteran Exemption (effective TY2026 per Constitutional Amendment 1, Nov 2024) — proportional reduction for 10-99% disabled. NM joins the categorical full-vet-exemption states.

2026 Otero County rate breakdown (consolidated millage per $1,000 of taxable value (33.33% AR × FMV), Alamogordo district)

Taxing entity	Rate
Combined county + municipal + school + special districts (~18 mills × 33.33% AR = ~0.60% effective, post $2,000 Head of Family)	18.0000
Combined total	18.0000

As of April 27, 2026 · From Otero County New Mexico Assessor.

Note: Otero County is **home to Holloman Air Force Base** — the celebrated US Air Force installation (~6,000 active-duty military and civilian personnel — the largest single-site employer in southeastern New Mexico) and home to the celebrated **49th Wing** (F-16 training) and the **German Air Force Tactical Training Center USA** (the only foreign air force operating from a US base — ~200 German Air Force personnel train at Holloman year-round on F-15 and Tornado aircraft). The county is also home to the celebrated **White Sands National Park** (the celebrated 275-square-mile gypsum dunefield — the largest gypsum dunefield in the world, a UNESCO World Heritage candidate), and the **White Sands Missile Range** (the major US Army missile testing facility — the largest US military installation by area, ~3,200 square miles, where the **Trinity Test** of July 16, 1945 detonated the first atomic bomb). Anchored by Alamogordo (~32K, the seat), Tularosa, the celebrated mountain resort village of **Cloudcroft** (~700, at 8,676 feet elevation in the Sacramento Mountains), and Mescalero (Mescalero Apache Tribe headquarters).

Note: Otero County effective property tax rates run approximately **0.60% — among the lower in New Mexico**. Combined county + municipal + school district + special district millage is ~18 mills (× 33.33% AR = ~0.60% gross). Median home values around $190K combined with the very low effective rate produce median annual bills around $1,140.

Note: For relocation buyers: Otero County offers **the celebrated Holloman AFB + White Sands + Cloudcroft southeastern New Mexico** option — substantial Holloman AFB military employment, the iconic White Sands National Park, the celebrated Sacramento Mountains resort communities (Cloudcroft is a major regional summer/winter getaway), and exceptional cost of living. The trade-off: substantial distance from major metropolitan amenities, persistent oil-and-gas industry economic cyclicality (the southeastern New Mexico Permian Basin oil-and-gas economy creates regional volatility), and aggressive summer heat at lower elevations (Alamogordo).

Deductions and exemptions for 2026

New Mexico homeowner property tax relief operates through five primary mechanisms: (1) the universal $2,000 Head of Family Exemption (NMSA §7-37-4), (2) the constitutional 3% annual residential AV cap (Sec. 7-36-21.2 NMSA, since 2001), (3) the Senior Valuation Freeze (true 0% increase for 65+ at or below ~$44,200 income), (4) the $10,000 universal Veteran Exemption (raised from $4,000 in 2025 by HB 47), and (5) the FULL Disabled Veterans Exemption (100% service-connected, NMSA §7-37-5.1) plus the NEW Proportional Disabled Veteran Exemption (10-99% rating, effective 2026 per Constitutional Amendment 1). Plus the unique structural protection of the Yield Control formula (limits annual revenue growth to inflation, capped at 5%).

$2,000 Head of Family Exemption (universal)

The Head of Family Exemption (NMSA §7-37-4) provides a universal $2,000 reduction in taxable value for any New Mexico resident head of household — saves ~$60-80/year at typical 30-40 mills. The exemption requires the property to be the applicant\'s primary residence (single-family owner-occupied dwelling) and the applicant to be a NM resident head of household. Apply once with County Assessor — the exemption persists in subsequent years (no annual renewal). New Mexico assessors estimate that ~10-15% of eligible NM homeowners fail to claim this exemption.

Yield Control formula (NMSA §7-37-7.1)

Yield Control is one of the most-restrictive revenue-growth limits in the United States. The formula limits annual property tax revenue growth from existing properties to the lower of (a) the implicit price deflator for state and local purchases of goods and services (capped at 5% statutorily) plus (b) the percentage increase in property value attributable to new construction. When valuations rise sharply, mill rates auto-adjust DOWNWARD to prevent windfall revenue increases. This is why New Mexico\'s effective rates have stayed remarkably stable around 0.55-0.85% statewide despite substantial home value appreciation since 2020. Yield Control applies only to operating levies, not debt service or special levies. **The combination of Yield Control + the 3% residential AV cap is structurally unique — it produces one of the most stable property tax bills in the United States for long-term homeowners.**

3% Annual Residential AV Cap (NMSA §7-36-21.2)

Effective since 2001, the 3% cap limits year-over-year value-driven AV increases to 3% per year for owner-occupied residential. Even if FMV rises 15%+ per year, taxable AV can only increase 3% per year. The cap RESETS at sale or upon major physical improvements — the celebrated "tax lightning" issue confirmed in Zhao v. Montoya (2014 NM Supreme Court). The reset can produce dramatic tax-bill spikes for new buyers who acquire property from long-term owners. Caps do NOT apply to new construction (first-year valuation) or solar improvements (specifically excluded by statute).

Senior Valuation Freeze (NMSA §7-36-21.3)

For owners 65+ or permanently disabled with modified gross income at or below $44,200 (2026, indexed), the AV is FROZEN at the level when first qualified — true 0% annual increase (more restrictive than the universal 3% cap). This is one of the most-progressive senior property tax protections in the United States. Apply with County Assessor.

$10,000 Universal Veteran Exemption + FULL 100% Disabled Vet Exemption + NEW Proportional 10-99% Exemption (2026)

New Mexico is one of the most-generous US states for veteran property tax relief — and got even more generous starting 2026. Three tiers: (1) Universal Veteran Exemption: $10,000 reduction in taxable value (raised from $4,000 in 2025 by HB 47, indexed annually for inflation, applies regardless of disability status). (2) 100% Service-Connected Disabled Veteran Exemption: FULL property tax exemption on principal residence — no income cap, no value cap, applies to any 100% rating including temporary 100%. (3) NEW Proportional Disabled Veteran Exemption (effective 2026 tax year, per Constitutional Amendment 1 approved by NM voters November 2024 and implemented by HB 47 in 2025): veterans rated 10-99% service-connected disabled receive an exemption proportional to their VA rating (70% rating = 70% reduction, etc.). NM joins WI, MI, IA, MN, NJ, PA, VA, MD, SC, AL, LA, MS, AR, OK in providing categorical full vet exemption for 100% disabled. Apply with NM Department of Veterans\' Services for Certificate of Eligibility, then submit to County Assessor.

Appealing your assessment

New Mexico property tax appeals follow a 3-tier process. Level 1: County Protest Board (for county-assessed property) or Administrative Hearings Office (for centrally-assessed property by the Property Tax Division). File written protest within 30 days of receiving your Notice of Value (typically mailed in April-May). The Board holds informal hearings — present comparable sales, recent appraisals, condition documentation, or income/expense data for income-producing property. Level 2: District Court. If unresolved, appeal to district court within 30 days of Board decision. Alternative: pay-and-protest (pay the disputed tax, then file a refund claim in district court). Level 3: New Mexico Court of Appeals + Supreme Court. Most NM appeals are resolved at Level 1. Tax cycle: Notice of Value mailed April-May, taxes assessed November 1, payable in halves (first half due November 10, second half due April 10).

Cities and towns in Otero County

Otero County contains 4 incorporated municipalities, ranging from Alamogordo to the smallest village. Search volume for property tax is often city-specific, so here is the complete list — with population from the 2020 US Census, rounded to the nearest 100.

Data: US Census Bureau, 2020 Decennial Census. Populations rounded. Cities marked as "split" straddle a county border — the portion inside Otero County is subject to Otero County's tax rolls, while the portion outside is subject to the adjacent county's.

City or town	Type	Population (2020)
Alamogordo County seat	city	32,000
Tularosa	village	2,700
Mescalero	Census-designated place	1,300
Cloudcroft	village	700

About city-level property tax rates: The rate breakdown and calculator on this page reflect the Alamogordo tax district. Other cities in Otero County may pay into different school districts, city rates, and special districts — so their combined rates can differ, sometimes substantially. Always verify the specific rates for your address with the Otero County New Mexico Assessor before relying on any estimate.

Frequently asked questions

When are New Mexico property taxes due?

New Mexico property tax bills are mailed November 1 each year. Pay in halves: first half due November 10, second half due April 10. Late payments accrue penalty plus interest. Most homeowners pay through escrow via mortgage servicer. New Mexico\'s tax cycle starts with a Notice of Value mailed by the County Assessor in April-May; you have 30 days to file a protest if you disagree with the valuation.

What is New Mexico\'s 33.33% taxable value ratio?

New Mexico\'s constitutional system values property at FMV, then applies a 1/3 (33.33%) ratio to determine taxable value. So a $300K home has taxable value of $100K. Tax = taxable value × millage / 1,000. At typical 30 mills, the gross tax is $3,000 (before $2,000 Head of Family exemption reduces taxable value to $98K, producing tax of $2,940). New Mexico is one of just three US states to use a 1/3 taxable value ratio (the others being Tennessee and Mississippi for some classes).

How does the Yield Control formula work?

Yield Control (NMSA §7-37-7.1) is one of the most-restrictive revenue-growth limits in the United States. The formula limits annual property tax revenue growth from existing properties to the lower of (a) inflation (capped at 5% statutorily) plus (b) growth from new construction. When valuations rise sharply, mill rates auto-adjust DOWNWARD to prevent windfall revenue increases. This is why New Mexico\'s effective rates have stayed remarkably stable around 0.55-0.85% statewide despite substantial home value appreciation since 2020. Yield Control applies only to operating levies, not debt service or special levies.

How does the $2,000 Head of Family Exemption work?

The Head of Family Exemption (NMSA §7-37-4) provides a universal $2,000 reduction in taxable value for any New Mexico resident head of household — saves ~$60-80/year at typical 30-40 mills. Apply once with County Assessor — the exemption persists in subsequent years (no annual renewal). New Mexico assessors estimate that ~10-15% of eligible NM homeowners fail to claim this exemption.

How does the Senior Valuation Freeze work?

For owners 65+ or permanently disabled with modified gross income at or below $44,200 (2026, indexed), the AV is FROZEN at the level when first qualified — true 0% annual increase (more restrictive than the universal 3% cap). This is one of the most-progressive senior property tax protections in the United States. Apply with County Assessor.

How does the Disabled Veteran exemption work in New Mexico?

New Mexico is one of the most-generous US states for veteran property tax relief. Three tiers: (1) Universal Veteran Exemption: $10,000 reduction in taxable value (raised from $4,000 in 2025 by HB 47, indexed annually for inflation, applies regardless of disability status). (2) 100% Service-Connected Disabled Veteran Exemption: FULL property tax exemption on principal residence — no income cap, no value cap, applies to any 100% rating including temporary 100%. (3) NEW Proportional Disabled Veteran Exemption (effective 2026 tax year, per Constitutional Amendment 1 approved by NM voters November 2024 and implemented by HB 47): veterans rated 10-99% service-connected disabled receive an exemption proportional to their VA rating. Apply with NM Department of Veterans\' Services for Certificate of Eligibility, then submit to County Assessor.

How do I appeal my New Mexico assessment?

About Otero County

Beyond the property tax — a few things you might not know about the place.

Weird fact

The **Trinity Test** — **the first detonation of a nuclear weapon in human history** — was conducted on July 16, 1945 at the celebrated **Trinity Site** in northern Otero County (technically the site sits in adjacent Socorro County, but is administered jointly with the White Sands Missile Range which is primarily in Otero). The bomb (codenamed "Gadget" — a plutonium implosion device with a yield of ~21 kilotons) was detonated atop a 100-foot steel tower at 5:29 AM Mountain War Time. The blast was visible from 200+ miles away, melted the surrounding desert sand into a glassy radioactive mineral now called **trinitite** (named for the Trinity Test), and produced a mushroom cloud that rose to 38,000 feet. The Trinity Test confirmed the feasibility of nuclear weapons design and led directly to the August 6 and 9, 1945 bombings of Hiroshima and Nagasaki, Japan — ending WWII. The **Trinity Site** is preserved as a National Historic Landmark and is open to public visitation **only twice per year** (the first Saturdays of April and October) — drawing 5,000-15,000 attendees per visit. The 2023 Christopher Nolan film **Oppenheimer** (winner of 7 Academy Awards including Best Picture) extensively dramatized the Trinity Test.

Hometown hero

J. Robert Oppenheimer (Trinity Test connection)

**J. Robert Oppenheimer** (1904-1967) — the celebrated American theoretical physicist, "the father of the atomic bomb," scientific director of the Manhattan Project, founding director of the Princeton Institute for Advanced Study — directed the Trinity Test from his command bunker at the **S-10,000 control point** in northern Otero County on July 16, 1945. Oppenheimer's celebrated reaction to the Trinity Test ("Now I am become Death, the destroyer of worlds" — quoting the Bhagavad Gita) was filmed in 1965 and became one of the most-celebrated scientific quotes of the 20th century. Oppenheimer's later life was complicated by his 1954 security clearance revocation during the McCarthy era (he was retroactively exonerated in 2022). The 2023 Christopher Nolan film **Oppenheimer** (starring Cillian Murphy as Oppenheimer, winning 7 Academy Awards including Best Picture) extensively portrayed Oppenheimer's Manhattan Project work in northern Otero County. **Other notable Otero County figures** include **Ham the Astrochimp** (the chimpanzee who became the first primate in space on January 31, 1961 — was trained at Holloman AFB Aeromedical Research Laboratory), and **Cy Young Award-winning pitcher Ron Guidry** (born 1950 in Lafayette, LA but with substantial Cloudcroft summer-home connections).

Biggest annual event

White Sands International Film Festival + Trinity Site Open Houses

The **White Sands International Film Festival** (annual, October at Alamogordo, since 2010) is a celebrated regional film festival drawing 15,000+ attendees over 6 days. The **Trinity Site Open House** (twice annually, the first Saturdays of April and October) is **among the most-celebrated atomic-history commemoration events in the world** — drawing 5,000-15,000 attendees per visit to walk on the radioactive Trinity Site ground zero. The annual **Cloudcroft Oktoberfest** (annual, early October in Cloudcroft) celebrates the village's German-Bavarian heritage.

Property Tax in Otero County, 2026