Tenant Screening

Can landlords require co-signers for rental approval?

Illinois rental guidance and tenant-landlord operational information.
Published February 22, 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 101 days ago · Illinois

Tenant Screening in Illinois: Can Landlords Require Co-Signers for Rental Approval?

When managing rental properties in Illinois, landlords often seek ways to minimize risk and secure reliable tenants. One common screening tool is the utilization of co-signers, also known as guarantors. This guide outlines the legal considerations and best practices for landlords in Illinois regarding the requirement of co-signers during tenant screening.

Understanding Co-Signers in the Illinois Rental Context

A co-signer is a person who agrees to be legally responsible for the lease obligations if the primary tenant fails to meet them. This means the co-signer promises to pay rent, cover damages, or fulfill any other lease conditions should the tenant default.

Requiring a co-signer is often an effective means to:

  • Mitigate risks linked to tenants with insufficient income or low credit scores
  • Provide added assurance for landlords when renting to younger tenants or students
  • Enhance lease security when the tenant has a short or unstable rental history

Can Illinois Landlords Require Co-Signers?

Yes, in Illinois, landlords are permitted to require a co-signer as a condition of rental approval. This practice is consistent with standard tenancy application processes as long as it is applied uniformly and complies with fair housing laws.

Key Points for Illinois Landlords:

  • Legal Right to Require a Co-Signer: Illinois landlords may require applicants who do not meet the landlord’s income, credit, or rental history criteria to provide a co-signer.
  • Written Documentation: The role and responsibilities of the co-signer should be clearly outlined in a written guaranty or lease agreement addendum.
  • Fair Housing Compliance: Co-signer requirements must be applied consistently and must not discriminate against protected classes under the Illinois Human Rights Act or the federal Fair Housing Act.
  • No Automatic Waiver of Other Screening Criteria: Even with a co-signer, landlords may continue to enforce credit checks, income verification, and rental history assessments.

Best Practices for Requiring Co-Signers in Illinois

To ensure smooth tenant screening and avoid legal complications, Illinois landlords should consider the following best practices:

1. Define Clear Criteria for When Co-Signers Are Required

  • Establish objective benchmarks (e.g., minimum income level or credit score) that trigger the co-signer requirement.
  • Communicate these criteria openly in rental listings, applications, or screening policies to maintain transparency.
2. Get the Co-Signer’s Legal Commitment in Writing
  • Use a guarantor agreement that specifies the co-signer’s responsibilities, including rent payment and damages coverage.
  • Ensure the co-signer understands that they will be held legally accountable under Illinois law if the tenant defaults.
  • The guarantor agreement should be signed before lease execution and kept with the tenant’s file.
3. Screen Co-Signers Thoroughly
  • Just as with tenants, conduct background checks on the co-signer. Verify their income, employment, credit history, and rental references.
  • Avoid accepting co-signers who present unacceptable risk, as this undermines the purpose of having a guarantor.
4. Treat All Applicants Equally
  • Apply the requirement consistently regardless of race, gender, national origin, disability status, or other protected classes.
  • Be cautious when co-signers are required only for certain groups, as this could raise discrimination claims.
5. Protect Tenant Rights on Security Deposits and Fees
  • Collect security deposits and fees in accordance with Illinois law.
  • Understand that having a co-signer does not alter the tenant’s rights to prompt return of deposits or dispute resolution.

Legal Framework Affecting Co-Signer Use in Illinois

Illinois Human Rights Act

  • This act prohibits discrimination based on protected classes and applies to leasing decisions, including the use of co-signers.
  • Landlords must ensure co-signer requirements do not disproportionately affect any protected group.
Residential Lease Agreement Act
  • While this act governs lease terms and conditions, it supports the use of guarantor agreements as part of lease contracts.
  • Properly drafted guarantor agreements are enforceable, allowing landlords to pursue co-signers for unpaid rent or damages.

Common Scenarios Where Co-Signers Are Useful

  • Students or New Entrants to the Workforce: Applicants with limited credit or rental history often require a parent or guardian as a co-signer.
  • Self-Employed or Freelance Tenants: Irregular income might necessitate a co-signer to guarantee timely rent payments.
  • Applicants with Prior Credit Issues: A co-signer with strong credit may offset tenant risks stemming from past financial difficulties.

How to Handle Co-Signers in Lease Enforcement

If a tenant defaults, Illinois landlords may:

  • Pursue eviction proceedings against the tenant.
  • Seek payment or damages from the co-signer under the guarantor agreement.
  • Collect unpaid rent or fees from both parties as allowed by the lease and guarantor agreement terms.

Conclusion

Illinois landlords have the right to require co-signers during tenant screening as part of prudent property management. By employing co-signers, landlords can enhance lease security, reduce financial risk, and support tenants who may otherwise face barriers to rental approval. To effectively incorporate co-signers, landlords should establish clear policies, ensure fair and consistent application, and use legally enforceable documents tailored to Illinois laws.

Adhering to these practices will help landlords balance risk management with fair housing compliance and maintain positive landlord-tenant relationships throughout Illinois.

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