Arizona Sales Tax Exemption for Nonprofits: Certificates and Letters

Arizona offers no blanket sales tax exemption for nonprofits. The state’s Transaction Privilege Tax statutes exempt only specific categories of nonprofit organizations, and even those organizations have to document their eligibility the right way. Holding a federal 501(c)(3) determination letter is a starting point, not the finish line. Depending on which category your nonprofit fits, you may need to apply for an exemption letter from the Arizona Department of Revenue, give vendors a particular exemption certificate, or both.

The Arizona Department of Revenue states plainly that it “does not provide an overall exemption from transaction privilege tax for nonprofit organizations.”¹ If your organization doesn’t match one of the categories in A.R.S. § 42-5061, the exemption doesn’t apply, no matter how charitable the work.

Which Nonprofits Qualify as Exempt Buyers

A.R.S. § 42-5061 lists the organizations whose purchases of tangible personal property are exempt from TPT under the retail classification:

Qualifying hospitals, including licensed hospitals operated exclusively for charitable purposes where no earnings benefit private individuals, licensed nursing care or residential care institutions not operated for profit, and government-operated hospitals or care institutions.²
Qualifying health care organizations: nonprofits recognized under IRC § 501(c) that spend at least 80 percent of all money received each year on health and medical-related educational and charitable services, verified by annual independent audits.²
Qualifying community health centers as defined in A.R.S. § 42-5001.
501(c)(3) organizations that regularly serve meals to the needy at no cost on a continuing basis.³
501(c)(3) organizations providing residential apartment housing for low-income persons over 62 in a facility that qualifies for a federal housing subsidy.³
501(c)(3) organizations that use purchased property exclusively in programs for training, job placement, rehabilitation, or testing for persons with mental or physical disabilities.³
Qualifying health sciences educational institutions as defined in A.R.S. § 42-5001.
Qualifying health care organizations dedicated to educational, therapeutic, and rehabilitative training for blind or visually impaired children and children with multiple disabilities from birth to age 21.³

These exemptions apply when the nonprofit is the buyer, and purchased items must be used for the organization’s qualifying purpose. A qualifying health care organization that buys furniture for its clinic can claim the exemption. The same organization buying supplies for a staff party cannot. Regulators look for a clear connection between the purchase and the exempt mission.

A.R.S. § 42-5159 extends parallel rules to use tax, which covers items bought from out-of-state vendors for use in Arizona.⁴ The same categories and documentation apply.

Do You Need an Exemption Letter From ADOR

Not every qualifying nonprofit follows the same process. Some categories must apply to ADOR for a formal exemption letter before they can use their exempt status. Others can claim the exemption without one.

An ADOR exemption letter is required for:

Qualifying hospitals
Qualifying health care organizations
Qualifying community health centers
Organizations running rehabilitation programs for persons with mental or physical disabilities

An exemption letter is not required for:

501(c)(3) organizations regularly serving free meals to the needy
501(c)(3) organizations providing federally subsidized senior housing for low-income persons over 62
501(c)(3) organizations solely providing graduate and postgraduate health sciences education

If your organization needs an exemption letter and doesn’t have one, vendors have no basis to waive TPT on your purchases, even if the organization clearly qualifies in principle. Healthcare organizations with an exemption letter must present it along with Form 5000HC when making purchases.⁵

One recent change makes this easier: exemption letters issued with a date of January 2024 or later no longer expire. They remain valid until the organization no longer qualifies. ADOR still expects each organization to run a self-review at the start of every year to confirm it still meets the statutory requirements. If the organization loses its nonprofit status or otherwise falls out of compliance, it must notify ADOR and every vendor it has given the letter to, and stop using the exemption immediately.⁵

Which Exemption Certificate to Give the Vendor

Arizona uses different exemption certificate forms depending on the organization and the purchase. An incomplete or wrong-form certificate won’t be accepted in good faith by vendors, so the choice matters.

Form 5000, Transaction Privilege Tax Exemption Certificate, is the general-purpose form used by most qualifying nonprofits for routine purchases. It documents the basis for the exemption and must be completed and given to the vendor at the time of sale.⁶
Form 5000HC, the Healthcare Exemption Certificate, is used by qualifying hospitals, health care organizations, and community health centers. It must be accompanied by a copy of the organization’s ADOR exemption letter.⁷
Form 5000A, the Arizona Resale Certificate, is used when a nonprofit buys tangible personal property for resale rather than for its own use. Certain nonprofits, including 501(c)(3) charities, organizations associated with major league baseball teams, rodeo sponsors, and organizations producing cultural or civic festivals, can purchase for resale using this form by attaching their IRS determination letter.⁸

Each certificate requires the organization’s full legal name, its Federal Employer Identification Number, and the specific statutory reason for the exemption. Only one exemption category can be claimed per certificate.⁹ Use the most current version from the ADOR website.

Give the completed certificate to the vendor at or before the point of sale. The vendor keeps it on file to document why TPT was not collected. For ongoing vendor relationships, a single certificate can cover a specified period rather than every individual purchase. When a vendor accepts a certificate in good faith, the burden of proving the exemption was valid shifts to the nonprofit. If ADOR later questions the transaction and the nonprofit cannot show the exemption was legitimate, the nonprofit owes the full amount of tax, plus penalty and interest, that the vendor would have owed.¹⁰

When Your Nonprofit Is the Seller

The rules flip when your nonprofit is the one making a sale. Under A.R.S. § 42-5061, 501(c)(3) organizations acting as retailers have a general exemption from state TPT, so a qualifying nonprofit generally does not need to collect state TPT on goods it sells.¹ No ADOR exemption letter is required for the seller-side exemption.

Two limits apply. Organizations under IRC § 501(c)(7), (8), or (9), such as social clubs, fraternal organizations, and voluntary employee beneficiary associations, face a 15-percent threshold: if more than 15 percent of gross revenue from the activity comes from nonmembers, the entire revenue from that activity becomes taxable at the city level. Unrelated business income is also taxable at the city level regardless of nonprofit status.¹

City Privilege Taxes Are Separate

Arizona’s cities and towns levy their own privilege taxes under the Model City Tax Code, and local exemptions do not automatically mirror the state-level exemptions. Each of the 91 cities and towns participating in ADOR’s tax system can choose which exemptions to adopt, which ADOR itself describes as creating a “wide divergence in local transaction privilege taxes.”¹¹

On the selling side, cities generally exempt nonprofits conducting taxable business activities under MCTC § 270, with the social club and unrelated business income exceptions noted above.¹ On the buying side, a purchase that is exempt from state TPT may still be subject to a city privilege tax. Check ADOR’s City/Town Profiles for every location where your organization buys or sells. Assuming a state exemption carries into every municipality is one of the most common mistakes nonprofits make in Arizona.

What a Wrong Claim Costs

Under A.R.S. § 42-5009, if the nonprofit cannot establish the accuracy and completeness of the information on an exemption certificate, it becomes liable for an amount equal to the TPT, penalty, and interest the vendor would have been required to pay.¹⁰ The liability runs from the date the organization stopped qualifying, not the date ADOR identifies the problem.

The same rule applies to organizations that once had an exemption letter but no longer qualify. ADOR’s guidance is direct: if you lose qualifying status and keep using the letter, you owe the tax, penalty, and interest from the date you stopped qualifying, whether you notified ADOR or not.⁵ That is why the annual self-review matters.

Keep the Records

ADOR audits normally cover the most recent four-year period. If tax returns have not been filed, the audit window can extend beyond four years.¹² During an audit, ADOR can request copies of every exemption certificate your organization provided to vendors. If you can’t produce them, the burden falls on you to prove entitlement through other evidence, which is a much harder standard.¹⁰

Keep exemption certificates, exemption letters, IRS determination letters, and records of qualifying expenditures organized and retained for at least four years. Health care organizations should keep records specifically supporting the 80-percent spending threshold. If any change in legal status, mission, or qualifying category occurs, issue updated certificates to every vendor on file.

1
Arizona Department of Revenue. Nonprofit and Qualifying Healthcare
2
Arizona Legislature. Arizona Code 42-5001 – Definitions
3
Arizona Legislature. Arizona Code 42-5061 – Retail Classification Definitions
4
Arizona Legislature. Arizona Code 42-5159 – Exemptions
5
Arizona Department of Revenue. Exemption Letter Required
6
Arizona Department of Revenue. Arizona Form 5000 – Transaction Privilege Tax Exemption Certificate
7
Arizona Department of Revenue. Arizona Form 5000HC – Transaction Privilege Tax Healthcare Exemption Certificate
8
Arizona Department of Revenue. Arizona Form 5000A – Arizona Resale Certificate
9
Arizona Department of Revenue. TPT Exemption Certificate – General
10
Arizona Legislature. Arizona Code 42-5009
11
Arizona Department of Revenue. Model City Tax Code
12
Arizona Department of Revenue. TPT Audit