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Treasurer's Office

ROSE MARY ROSAS  was elected the Socorro County Treasurer in 2021 and is serving her First term through 2024. The Socorro County Treasurer is the ex-officio collector for all taxing authorities in Socorro County. Taxing authorities include such organizations as the State of New Mexico, school districts, community colleges, municipalities and soil & water and river authorities. The County Treasurer also is responsible for reconciling all other money due to other county departments such as fees for services, licenses, and revenues from bond issues and special assessments.

The Treasurer assures the legality and propriety of deposits and disbursements and invests surplus moneys until they are needed for county operations. The Treasurer is elected by the county voters at large as an independent office and is subject to guidance from the Department of Finance and Administration. Neither the Board of County commissioners nor the Board of Finance has superintending management or supervisory authority over the Treasurer’s Office. All investment actions are by advice and consent. The Treasurer's Office is a public office. 

ROSE MARY ROSAS  has appointed  BLANCA JAQUEZ as her Chief Deputy Treasurer.

 Department Resources

Upon the County Assessor's assessed valuation, the Treasurer prepares and mails property tax bills and delinquency notices, and subsequently collects the real and personal property taxes of Socorro County property owners. The Treasurer also serves as banker to all other revenues, such as proceeds from bond issues and special assessments. The Treasurer invests surplus funds until they are needed for county operations. Office Hours are Mon-Fri 8:00 a.m. to 4:30 p.m. We are open through the lunch hour.

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    Pay Your Taxes Online

Property Taxes & Payments

Property tax payments can be made by mail or in person. It is the responsibility of the property owner to ensure property taxes are paid. If someone else is to pay on your behalf, such as your lender or escrow company, you will need to contact them directly regarding this matter.

  • To pay in person, go to the Office of the County Treasurer located in the Socorro County Courthouse at 200 Church Street in Socorro. Check, money order, cash, debit and credit cards are accepted in person.
  • To pay over the phone, call us at 575-835-1701 to make credit or debit card payments.
  • To pay online follow this link to make credit card and e-check payments.
  • To pay by mail, send payments to: Socorro County Treasurer, PO Box KK, Socorro NM 87801. DO NOT SEND CASH by mail.

If you do not have your payment coupons, please send your payment and be certain to write the tax bill number or account number on the check to ensure proper crediting of your payment. If you do not have either number for your property, please call 575-835-1701 or lookup your account online

For more complete information regarding property tax owner, name change, address correction, valuation, and more, please contact the County Assessor at 575-835-0714 of visit the County Assessor's web page.

When are property tax bills mailed and when are taxes due?

Tax bills are mailed on November 1st of every year as required by state law. Taxes are due in two equal installments. The first half payment is due November 10th and must be paid by December 10th to avoid delinquent charges. Second half payments are due by April 10th of the following calendar year and must be made by May 10 or the first business day thereafter to avoid delinquent charges. You will only receive one bill and no additional notice for the 2nd half installment

You may also elect to make tax payments in pre-payment installments. Option 1 is for four 25% installments on July 10th, November 10th, January 10th and May 10th. Option 2 is for 10 monthly installments beginning June 1st and ending March 1st.

What is the last day to mail my taxes to avoid paying penalty and interest?

First-half payments or full payments must be postmarked by December 10th. Second half payments must be mailed by May 10th. If those deadlines fall on a Sunday, the date will be extended into the next business day.

Mortgage Company Payments

Your mortgage company usually pays your property taxes. It is your responsibility to forward the tax bill to your mortgage company for payment. By State law, the property owner is responsible to make sure that the mortgage company has paid the property taxes owed.

To determine if your mortgage company has made your payment, call us at 575-835-0714. You will need your tax bill number, owner name or parcel identification number. You may also check your account online.


If an overpayment should occur for  property taxes upon Treasurer’s discretion amount of overpayment may be applied as a credit to next year's tax bill otherwise a refund will be issued to taxpayer with a $25.00 processing fee applicable.

 Mortgage Companies  will be refunded any overpayment  with a processing fee of $25.00 applicable.

Penalty & Interest

If you did not receive your property tax bill and the taxes are now delinquent, you are responsible for penalty and interest charges. By State law, the property owner is responsible for paying the taxes on time whether or not you receive a tax bill. If you have not received your tax bill by November 15th, call us at 575-835-0714 for help.

Delinquent Taxes

If your taxes become delinquent, by State law (7-38-15 NMSA 1978), each June the County will mail a delinquency notice to the assessed property owner for any tax bill 30 or more days delinquent. The notice will inform the owner that if the taxes on real property, including penalty and interest charges, are not paid within two years from the date of delinquency, the property will be sold at state public auction. For owners of mobile homes and personal property, the notice will state that the property is subject to seizure and subsequent sale after six months from the date of delinquency.

What can I do if my delinquent taxes have been transferred to the New Mexico State Property Tax Division for collection?

Once taxes have been transferred to the Division for collection, all delinquent taxes, penalties, interest, and costs must be paid in full or your property may be offered for sale at public auction. If a property owner is unable to pay in full, the owner may prevent the sale of the property by entering into an Installment Agreement with the State Property Tax Division for payment on all outstanding liabilities.

I have been contacted by the New Mexico State Property Tax Division and informed that my property will be sold at public auction. I owe back taxes for prior years. May I just pay the oldest delinquent tax to prevent the sale of the property?

Real property owners who owe three or more years of prior taxes will have their property sold by the State unless delinquent taxes, interest and penalty charges for all years are paid in full by the date of the sale of the property (4-38-65-NMSA 1978).

How can I obtain a listing of properties that may be sold for delinquent taxes?

All tax sale lists must be published in a newspaper of general circulation for three weeks preceding the week of the sale. You may also pick up a calendar of currently scheduled sales and/or current sales lists in Santa Fe at: The Manuel Lujan Building, 1200 S. St. Francis Dr. Requests should be sent to:Property Tax Division, PO Box 25126, Santa Fe, NM 87504-5126 Phone (505) 827-0786 Fax (505) 827-0782

 Key Contacts

Rose Mary Rosas
575.835.1701 x2306

575.835.1701 x2305

 Important Links

NM Property Tax Div.