Co-Signer vs Guarantor: What Is the Difference and Which Do You Need?
The short answer
Co-signers sign the lease with you; guarantors are backup payers. Learn the legal differences, what landlords require from each, and alternatives like institutional guarantors.
If your income, credit, or rental history does not meet a landlord's requirements, they may ask you to provide a co-signer or guarantor. These two terms are sometimes used interchangeably — but they are legally distinct. Understanding the difference can save you from surprises.
What Is a Co-Signer?
A co-signer is a person who signs the lease alongside you. They are a legal party to the rental agreement and share full responsibility for:
- Paying rent if you cannot
- Covering damages beyond the security deposit
- Any lease violations that result in financial liability
Co-signers are typically listed on the lease, occupy the same legal position as a tenant, and can sometimes live in the unit (though not always).
What Is a Guarantor?
A guarantor is a third party who agrees to pay the landlord only if the tenant defaults — after the landlord has exhausted remedies against the tenant. Key distinctions:
- A guarantor is typically NOT on the lease as a tenant
- A guarantor's liability is secondary (they pay after the tenant defaults, not simultaneously)
- Guarantors are more common in commercial leases and sometimes residential leases in major cities (especially NYC)
Co-Signer vs Guarantor: Key Differences
| Factor | Co-Signer | Guarantor |
|---|---|---|
| Signs the lease? | Yes | Often no (signs a guaranty agreement) |
| Liability timing | Immediately joint liability | Secondary (after tenant defaults) |
| Lives in unit? | Sometimes | Almost never |
| Credit check needed? | Usually yes | Usually yes |
| Income requirement | Combined income usually 3x rent | Often 80-100x monthly rent in annual income (NYC standard) |
What Do Landlords Require from Co-Signers and Guarantors?
Co-signers and guarantors are typically required to have:
- Good credit (usually 680+ credit score)
- Strong income — many landlords require the co-signer/guarantor to earn at least 80x the monthly rent annually
- US-based income and assets (foreign guarantors are rarely accepted by US landlords)
- Willingness to submit to a background and credit check
In NYC, some landlords require institutional guarantors (like Insurent or TheGuarantors) if no personal guarantor is available.
Who Can Be a Co-Signer or Guarantor?
Common choices:
- Parents or other family members with strong income and credit
- A close friend or colleague (though this strains personal relationships if problems arise)
- An employer (rare, but sometimes offered for job relocations)
The person must be willing to be legally and financially responsible for your rent. This is a significant ask — approach it thoughtfully.
Institutional Guarantor Services
If you cannot find a personal co-signer, institutional guarantor services can help:
- Insurent: Charges 70–90% of one month's rent. Accepted at many NYC buildings.
- TheGuarantors: Coverage for landlords in NYC, Boston, Chicago, and more.
- Leap (formerly Rhino): Also offers deposit replacement alongside guaranty.
These services charge you a fee (essentially an insurance premium) in exchange for guaranteeing your rent to the landlord.
Avoid Needing a Co-Signer: Get Pre-Verified
The best way to avoid the co-signer requirement is to qualify on your own credentials. A Settl Verified Passport with bank-verified income shows landlords your full financial picture. Many landlords who would otherwise require a co-signer will waive the requirement for a verified, high-scoring applicant.
Get your Settl verification today.
Settl Editorial
Settl Editorial
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