Maricopa County Treasurer’s Office

John M. Allen, Treasurer

Maricopa County Treasurer's Office

Bulk Payments

Maricopa County offers a FREE and simple solution to Mortgage Companies, Tax Servicing Companies, Developers and other multi-account payers – The Corporate Services System (CSS).

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Arizona Revised Statutes (42-18051/E) allows County Treasurers to require electronic transmission of tax payment support documentation from third party payers or entities with a high volume of accounts.

Why CSS?

Why CSS?

The CSS was designed for any entity making regular tax payments, annually or semi-annually, for 50 or more tax accounts or a total dollar amount due of $50,000 (real estate parcel, mobile home, business personal property, and/or centrally assessed) at the same time.

Typical clients include: tax services, mortgage companies, real estate developers and investors, banks (reo), utilities companies and railroads, retail store chains and restaurants, management companies, and individuals.

The CSS clients manage their accounts and payments through electronic request and payment files.

CSS is exclusively for current year tax processing.

What is required?

What is required?
  • Internet access.
  • Electronic Spreadsheet: MicroSoft Excel, Lotus 1-2-3, Apache OpenOffice Calc, or a Text file saved the comma delimited format (.CSV).
  • No special hardware is required.

What is the CSS process?

CSS Process
  • A request file is uploaded to the CSS.
  • Once all accounts are stored, a payment file is generated and available through the CSS for download.
  • The payment file, once reviewed and edited, if necessary, is uploaded to the CSS.
  • Payment is remitted with a corresponding remittance voucher, generated through the CSS.

How is Payment remitted?


Payment is submitted by check, ACH credit, or wired funds. (Currently credit card and ACH debit are not available options.)

How do I register?

How to register

Contact the Corporate Services representative at 602-372-1202.

What is the mailing address?

Mailing Address
  • Attention: Corporate Services
  • Maricopa County Treasurer's Office
  • 301 West Jefferson, Suite 100
  • Phoenix, Arizona 85003-2199

For more information about the CSS or how to apply for access, please contact the Corporate Services department at 602-372-1202.

Seniors needing additional property tax relief and Arizonans not required to file individual income taxes may be able to take advantage of state tax credits

Individual income tax filing season in the state provides potential benefits for Arizonans whose income level is below minimum threshold limits and not required to file an individual income tax return or are seniors who own a residence.

Both may still be eligible for state tax benefits by submitting two forms available through the Arizona Department of Revenue - Form 140ET Credit for Increased Excise Taxes or Form 140PTC Property Tax Refund Claim.

  • Form 140PTC is used by qualified individuals to claim a refundable income tax credit for taxes paid on property located in Arizona that is either owned by or rented by the taxpayer. Form 140PTC provides a tax credit of up to $502. To claim a property tax credit, you must file your claim or extension request by April 15, 2020. You cannot claim this credit on an amended return if you file it after the due date.
  • Form 140ET is used by individuals not required to file an Arizona individual income tax return but qualify to claim the refundable excise tax credit. The maximum credit available for the increased excise tax (Form 140ET) is $100 per household. An excise tax is a tax levied on certain goods by the state or federal government such as fuel, cigarettes, cellphones and alcoholic beverages.

Individuals not filing an income tax return and claiming both credits need only to complete Form 140PTC. However, individuals not submitting a tax return and not claiming the property tax credit must complete Form 140ET to claim the credit for increased excise taxes.

To determine eligibility for either Form 140PTC or Form 140ET, see form instructions at

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CP Expirations Legal Changes

There has been a change in CP Liens that is applicable to lienholders. Beginning September, 2019, SB1236 will include a provision that modifies the language in §A.R.S. 42-18127 Section A.

The original certificate of purchase, in addition to all subsequent taxes (sub taxes) will expire if an action to foreclose has not commenced within ten years after the last day of the month in which the original certificate was acquired.

Pursuant to this legislation, tax liens eligible for expiration will include the original certificate and all related sub taxes in the expiration process. Those liens with deadlines that are already in effect will not be affected however it will affect all future sub taxing liens so that the deadline will expire within a ten year period after the last day of the month that it was acquired and time limits cannot be extended to the original purchase.

You should consult your attorney for further advice.

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Beware of Alternate Tax Payment Websites!

Please be aware of other property tax payment websites which could mislead you to believe they are the Maricopa County Treasurer’s website. Although you can make payments through them, they are not our official agent and will charge you processing fees. We have no control over payments made through them.

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Parcel number 123-45-678 9, can be entered as 123 45 678

Parcel number 123-45-678a 9, can be entered as 123 45 678 a

For Mobile Home/Business Personal Property - Use the personal property roll number with a prefix of 9 as the parcel number.
Example: Roll number 60-00-001 8 can be entered as 960 00 001.

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