Tenant Screening

Can landlords require co-signers for rental approval?

Arizona rental guidance and tenant-landlord operational information.
Published March 3, 2026 State-specific rental guidance Update This Question
Reviewed by Tenants & Landlords Editorial Team

This rental guidance was reviewed by the Tenants & Landlords Intelligence Team, specializing in lease agreements, notices, rent disputes, deposits, evictions, and tenant-landlord operational procedures.

Asked 92 days ago · Arizona

Can Landlords Require Co-Signers for Rental Approval in Arizona?

In Arizona, landlords have broad discretion when it comes to tenant screening and establishing criteria for approving rental applications. One common question among Arizona landlords is whether they can require a co-signer (also known as a guarantor) as part of the rental approval process. The answer is generally yes—landlords in Arizona may require co-signers under certain conditions, provided they comply with state and federal laws.

This article outlines the key considerations for Arizona landlords regarding co-signers, including legal background, best practices, and how to properly incorporate co-signers into your tenant screening process.


Understanding Co-Signers in Arizona Rental Agreements

A co-signer or guarantor is a third party who agrees to be legally responsible for the obligations of the lease if the primary tenant fails to meet them. This can include paying rent, covering damages, and fulfilling any other lease terms.

Why Require a Co-Signer?

Landlords often request a co-signer to:

  • Mitigate risk when a prospective tenant has poor or insufficient credit history
  • Qualify tenants with low income or unstable employment
  • Provide additional security when renting to students, young adults, or individuals new to the area
In Arizona, requiring a co-signer is a legitimate part of tenant screening as long as it is applied consistently and does not violate discrimination laws.

Arizona Landlord Rights and Tenant Screening Laws

Screening Criteria and Consistency

Arizona landlord-tenant law does not specifically restrict landlords from requiring co-signers. However, Arizona Revised Statutes (ARS) § 33-1324 requires landlords to treat applicants fairly:

  • Screening criteria must be non-discriminatory.
  • All applicants must be subject to the same screening standards for co-signers or other requirements.

Compliance with Anti-Discrimination Laws

The Americans with Disabilities Act (ADA), the Fair Housing Act (FHA), and Arizona’s own civil rights laws prohibit discrimination based on race, color, religion, national origin, sex, familial status, disability, and other protected classes.

  • You cannot require a co-signer only from applicants belonging to protected classes.
  • Co-signer requirements should be applied based on objective financial criteria, such as income-to-rent ratio or creditworthiness.

Implementing Co-Signer Requirements in Arizona

Establish Clear and Objective Criteria

Before requiring co-signers, develop written screening criteria that specify when a co-signer will be necessary. These criteria might include:

  • Minimum credit score threshold
  • Required gross monthly income relative to rent (typically 2.5 to 3 times the rent)
  • Employment history verification
  • Rental history concerns (e.g., poor references, prior evictions)

Sample Conditions for Requiring a Co-Signer

  • Applicant’s income is less than two and a half times the monthly rent.
  • Applicant’s credit score falls below a predetermined level.
  • Applicant lacks rental or credit history.

Drafting the Co-Signer Agreement

  • The co-signer must sign a co-signer agreement or guaranty, which explicitly states their obligations.
  • The agreement should reference the terms of the main lease and specify that the co-signer assumes full responsibility if the tenant defaults.

Verifying Co-Signer Qualifications

Most landlords apply screening procedures equally to co-signers as they do to tenants:

  • Check co-signer’s credit report.
  • Verify co-signer’s income and employment.
  • Confirm co-signer’s willingness to fulfill lease obligations.

Additional Considerations for Arizona Landlords

Security Deposit vs. Co-Signer Requirement

In Arizona, a security deposit is typically collected in addition to any co-signer agreements. Co-signers do not replace the need for a security deposit but serve as an additional layer of financial protection.

Notices and Disclosure

  • Fully disclose the co-signer requirement on rental applications or any leasing materials.
  • Provide applicants with written explanations of approval criteria upon request to maintain transparency.

Using Co-Signers for Roommates and Multiple Applicants

Landlords can also require co-signers when multiple tenants apply jointly or when one or more applicants do not meet screening standards individually.


Summary

Arizona landlords may require co-signers as part of the tenant screening process to safeguard their rental investments. To implement co-signer requirements effectively and legally, landlords should:

  • Apply co-signer requirements consistently and based on objective financial screening criteria.
  • Comply with all applicable anti-discrimination laws.
  • Use comprehensive co-signer agreements that clearly outline obligations.
  • Verify co-signers’ financial standing as thoroughly as primary tenants.
By ensuring clear policies and fair application, landlords in Arizona can use co-signers as a valuable tool to reduce risks associated with renting to tenants with limited or marginal financial qualifications.

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