Taxes in Los Alamos
Los Alamos's tax picture combines a moderate effective property tax rate with a real, relevant retirement-income distinction given the area's exceptional incomes.
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Learn moreA moderate effective property tax rate
Los Alamos County's effective property tax rate ran approximately 0.80% -- below the national median (~1.02%), with a median annual bill of approximately $2,472.
New Mexico's real, current six-bracket income tax
New Mexico taxes income from 1.5% up to a 5.9% top marginal rate on taxable income above $210,000 single/$315,000 married-filing-jointly for 2026.
A real, especially relevant retirement-income distinction here
New Mexico's Social Security exemption caps out at $100,000 AGI (single) / $150,000 (MFJ) -- a threshold a meaningful share of Los Alamos's exceptionally high-earning households plausibly exceed, unlike in lower-income NM markets.
Key takeaways
- Los Alamos County's effective property tax rate (~0.80%) runs below the national median.
- New Mexico's six-bracket income tax (1.5%-5.9%, 2026) applies statewide.
- New Mexico's Social Security income cap is especially relevant given Los Alamos's high incomes.
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