First half of 2026 Los Alamos County property taxes due Dec. 10
Bills went out Nov. 1; payment cutoffs range from 3 p.m. online to midnight by mail or drop box.
LOS ALAMOS - The first half of 2026 property taxes is due Thursday, Dec. 10, according to a Los Alamos County release. The county's Finance Division mailed this year's bills Nov. 1, and owners who miss the deadline face penalties and interest.
Payments can be made in person by 5 p.m. that day at the Customer Care Center in the Municipal Building lobby, 1000 Central Ave., or with Enterprise Bank and Trust tellers at 1200 Trinity Drive in Los Alamos and 77 Rover Blvd. in White Rock.
Checks or money orders in sealed envelopes can go in the Municipal Building's lobby or parking-lot drop boxes until midnight. Mailed payments to P.O. Box 99, Los Alamos, NM 87544-0099 must be postmarked by midnight.
Online payments through eNoticesOnline.com must be made by 3 p.m. and need the County Authorization Code printed on the bill.
Owners who pay through escrow should confirm the payment with their lender. Questions about ownership, addresses or valuations go to the County Assessor at 662-8030; payment questions go to Customer Care at 505-662-8333.