A complete guide to guarantors vs cosigners (2026)

If you’re searching for a new apartment, you’re likely comparing different housing options and rental requirements. In some cases, you might even consider asking a family member or friend to help you qualify for a lease. This is where many renters start wondering about guarantors vs. cosigners.

At first glance, renting an apartment seems simpler than buying a home.

After all, when you rent, you generally only need to find a place you like, apply for the lease, and start paying rent. Buying a home, on the other hand, involves a much longer process including inspections, financing, mortgage applications, and negotiations.

So renting is always simpler, right?

In most cases, yes—but there are a few exceptions.

If you are renting in a competitive housing market, moving to a new country, or don’t yet meet certain financial requirements, a landlord may ask you to provide a guarantor or a cosigner before approving your lease.

Of course, you can avoid these complications completely if you opt for a flexible furnished rental apartment from Blueground. Our apartments never require our guests to use a guarantor or cosigner!

In this guide, we’ll explain:

• The difference between a guarantor and a cosigner

• When landlords require them

• Who can serve as one

• How they affect your lease agreement

What is a guarantor?

A guarantor is someone who agrees to take financial responsibility for your lease if you fail to meet your obligations as a tenant.

In simple terms, a guarantor promises the landlord that rent will still be paid if the tenant cannot pay.

Guarantors are often:

• Parents

• Close family members

• Employers

• Trusted friends

In some markets, specialized companies even offer professional guarantor services for renters who cannot provide a personal guarantor.

It’s important to understand that a guarantor is not considered a tenant.

This means the guarantor:

• Does not live in the apartment

• Has no right to occupy the property

• Is only responsible for covering unpaid rent or damages if the tenant defaults

Depending on the lease agreement, a guarantor may also be responsible for property damage or unpaid fees after the tenant moves out.

What is a cosigner?

A cosigner is someone who signs the lease alongside the primary tenant and shares legal responsibility for the rental agreement.

Unlike a guarantor, a cosigner is typically considered a co-tenant on the lease, even if they do not live in the apartment full time.

A cosigner can be:

• A partner

• A roommate

• A parent or family member

• Another financially qualified individual

By signing the lease, a cosigner agrees to be equally responsible for the financial obligations of the lease, including:

• Rent payments

• Security deposits

• Fees or damages outlined in the lease

Because they are legally tied to the lease, cosigners may also have rights related to the rental agreement, depending on local housing laws and the specific lease terms.

What’s the difference between a guarantor vs a cosigner?

The main difference between a guarantor and a cosigner is how they participate in the lease agreement.

Here are the key distinctions:

In most cases:

• A guarantor is a financial safety net for the landlord.

• A cosigner is a secondary leaseholder who shares responsibility for the agreement.

Why might you need a guarantor or cosigner?

Landlords and property managers use guarantors or cosigners to reduce financial risk when approving tenants.

If a renter does not fully meet the landlord’s screening criteria, a guarantor or cosigner provides an extra layer of security.

Here are some common situations where this might happen.

1. You’re a student

Students often have limited income or credit history, which can make it difficult to qualify for an apartment independently.

In many student housing situations:

• Parents act as guarantors

• Multiple roommates sign as cosigners

This assures landlords that the rent will be paid even if the student has limited financial resources.

2. Your income is below the required threshold

Many landlords require tenants to earn 2.5 to 3 times the monthly rent.

If your income falls below that requirement, a guarantor or cosigner may help strengthen your application.

In some cases, landlords may also accept:

• Several months of rent paid upfront

• A larger security deposit (where legally permitted)

3. You have a low credit score

In countries like the United States, landlords often check a tenant’s credit score as part of the screening process.

A lower credit score can signal financial risk to landlords—even if your income is high.

Adding a guarantor or cosigner with stronger credit may help offset that concern.

4. You have no credit history

Many renters—especially recent graduates, young professionals, or international renters—have little or no credit history.

Without a financial track record, landlords may feel uncertain about approving the lease.

In these cases, a guarantor or cosigner can demonstrate that someone with established financial stability is backing the lease.

5. You have no rental history

If you’ve never rented before, you may not have references from previous landlords.

Because rental history helps landlords assess reliability, first-time renters often rely on a cosigner or guarantor to strengthen their application.

Do landlords prefer guarantors or cosigners?

Landlords generally prefer whichever option provides the strongest financial protection.

Both arrangements help reduce the landlord’s risk, but they function slightly differently.

With a cosigner, the landlord can pursue payment from either party immediately if rent is not paid.

With a guarantor, the landlord typically first seeks payment from the tenant and then from the guarantor if the tenant defaults.

In competitive rental markets, having a qualified guarantor or cosigner can significantly improve your chances of getting approved for an apartment.

Tips before asking someone to be your guarantor or cosigner

Before asking someone to take on this responsibility, it’s important to consider the potential impact.

A guarantor or cosigner is taking on real financial risk, which could affect their credit or finances if payments are missed.

Before signing anything:

• Make sure they understand the full financial obligation

• Review the lease terms together

• Discuss expectations for rent payments and responsibilities

• Understand how long the guarantee will last

Even strong relationships can become strained if financial issues arise, so transparency is essential.

Final thoughts

Understanding the difference between a guarantor and a cosigner can make the apartment search much easier.

Both options are designed to help renters qualify for housing when they don’t fully meet a landlord’s requirements on their own.

If you prepare ahead of time and have the right documentation ready—including a potential guarantor or cosigner—you’ll be better positioned to secure the apartment you want, especially in competitive housing markets.

The most important thing is to be open and upfront with landlords about your situation so there are no surprises during the application process.

Bottom line, there are a variety of circumstances where a landlord will benefit by requiring a cosigner or guarantor, so if you prepare in advance you will be well on the way to securing the apartment of your dreams. Of course, opting for a furnished rental lets you skip finding a guarantor!