Co-signing for a mortgage: What you need to know

PublishedJan 17, 2023|Last EditedJun 24, 2026|Time to read min

      Quick insights

      • Co-signing a mortgage means you’re legally responsible for someone else’s loan, even though you won’t own the property.
      • If the primary borrower misses mortgage payments, you’re responsible for making the payment, which can impact your credit score and debt-to-income ratio (DTI).
      • To qualify as a co-signer, you typically need an excellent credit score, sufficient monthly income and proof of your relationship to the borrower.

      Co-signing a mortgage loan can seem like a normal part of homebuying. For example, a parent may eagerly co-sign a child’s mortgage, wanting to help them buy their first home. However, if the child falls behind on payments, the parent becomes financially responsible. This is just one scenario that demonstrates why it’s important for both parties to know what’s involved in co-signing a mortgage.

      What is a co-signer on a mortgage?

      A mortgage co-signer is a person who agrees to take responsibility for repaying a mortgage loan alongside the primary borrower. Because the co-signer’s credit history and income are considered in the application process, this may help the borrower qualify for the loan or secure better terms. If the primary borrower defaults, the co-signer is legally obligated to cover the payments.

      Why would someone need a co-signer on a mortgage loan?

      There are several reasons why someone might need a co-signer on a mortgage loan:

      • High debt-to-income ratio: A high debt-to-income ratio (DTI) can make it difficult to qualify for a mortgage. A co-signer can improve the overall financial picture.
      • Limited income: If the primary borrower’s income is too low to meet lender requirements, a co-signer with a stable income can strengthen the application.
      • Lack of down payment: Some lenders may require a larger down payment. A co-signer can provide additional financial security, making the loan more attractive to loan providers.
      • Family or relationship support: Sometimes, a family member or close friend co-signs to help a loved one achieve homeownership, providing both financial backing and emotional support.

      In each of these scenario, a co-signer can improve the chances of mortgage preapproval. However, it’s important for both parties to fully understand the responsibilities involved.

      Mortgage co-signer vs. co-borrower

      A mortgage co-signer agrees to take responsibility for a mortgage if the primary borrower defaults. The co-signer doesn’t have ownership rights to the property or a say in its management, though. Their general roles are to help with qualification and provide a financial safety net. Missed payments can affect the co-signer’s credit score.

      In contrast, a co-borrower shares both the responsibility for the loan and ownership of the property. This means they’re equally liable for mortgage payments, benefit from ownership, and their income is considered in the application. While both can see credit impacts from missed mortgage payments, only a co-borrower has an ownership stake in the home.

      A co-signer can also be a co-borrower on a mortgage, but they don’t have to be. The roles and responsibilities between co-signer and co-borrower differ and may be worth exploring on your homebuying journey.

      Mortgage co-signer responsibilities and rights

      Here are some responsibilities that come with co-signing a mortgage loan:

      • Financial documentation: Your credit history and financial information are subject to review when co-signing a mortgage application.
      • Loan repayment: If the primary borrower defaults on payments, you are responsible for repaying the loan.
      • Credit impact: Your credit score will be affected by the mortgage. Missed payments can negatively impact it.
      • Communication: Open communication regarding the mortgage may help avoid misunderstandings and greater issues that affect repayment.

      Co-signer requirements for a mortgage

      There are specific requirements that must be met before you can co-sign a mortgage, such as credit score, DTI, income and citizenship. By meeting the criteria, co-signers can effectively support primary borrowers in achieving their homeownership goals while protecting their own financial interests.

      General requirements

      • Credit score: Usually, the minimum credit score to qualify for a mortgage is around 620, though some lenders may allow lower scores for certain loan types.
      • Debt-to-income ratio: Loan providers typically prefer a DTI below 43%. This ratio considers both the co-signer’s and primary borrower’s debts relative to their income.
      • Income: Co-signers must demonstrate a stable income, which may be evaluated through pay stubs, tax returns or bank statements.
      • Citizenship: Most lenders require co-signers to be U.S. citizens or permanent residents.
      • Credit history: A strong credit history generally helps with loan qualification. Lenders typically look for a track record of timely payments and responsible credit use.

      Specific loan type requirements

      • Conventional loans: Co-signers can be family members or friends, and their income can help meet the loan’s income and credit requirements.
      • FHA loans: Co-signers may qualify with lower credit scores. However, they still need to provide proof of income and meet any DTI limits.
      • VA loans: While the VA doesn’t require a co-signer, if one is used, they must meet credit score and income standards. Co-signers are often required to be veterans or active-duty servicemembers.

      Benefits of co-signing a mortgage

      Co-signing a mortgage can be a major financial decision, but it also comes with several potential advantages for both parties.

      • Improved loan approval chances: A co-signer with a strong credit history can help the primary borrower qualify for a mortgage that they might not secure on their own.
      • Better interest rates: Co-signers can enhance the overall creditworthiness of the loan application, potentially leading to lower interest rates.
      • Increased loan amount: With a co-signer’s income considered, borrowers may qualify for a larger loan amount, allowing them to purchase a more suitable home.
      • Building credit: Co-signers can help the primary borrower build or improve their credit score by ensuring timely mortgage payments. Consistent payments can positively affect credit.
      • Support for family or friends: Co-signing can be a way to help support loved ones, helping them achieve homeownership, and maybe even financial independence in the long run.
      • Shared responsibility: While the chief borrower is primarily responsible for the loan, having a co-signer can alleviate some pressure. They can provide support in case of financial difficulties.

      Risks of co-signing on a mortgage

      Co-signing a mortgage can seem like a helpful gesture to someone you care about but isn’t without risks, including:

      • Financial responsibility: The co-signer is legally responsible for the loan. If the borrower defaults, the co-signer must make the payments, which could strain their finances.
      • Credit score: Any missed payments or defaults will negatively affect the co-signer’s credit score, making it harder for them to secure their own loans in the future.
      • Relationship strain: Financial obligations can lead to tension or conflict between the co-signer and the borrower, especially if payment issues arise.
      • Limited control: The co-signer typically has no say in how the mortgage is managed or decisions made regarding the property, despite being financially liable.
      • Tax implications: Co-signers may face tax implications related to the mortgage, as they are responsible for any interest payments that could potentially impact their tax situation. It may be helpful to seek advice from a tax professional.

      Can a co-signer be removed from a mortgage?

      Yes, a co-signer can be removed from a mortgage, potentially through any of the following methods:

      • Refinancing: The borrower can refinance the loan in their name only, paying off the original mortgage.
      • Loan modification: Some lenders may allow a modification that removes the co-signer, provided the borrower can demonstrate financial stability.
      • Selling the property: Selling the home pays off the mortgage and eliminates the co-signer’s liability.

      Consult with a lender to understand their specific policies and requirements for removing a co-signer.

      Alternatives to co-signing a mortgage

      Many borrowers with a lower income can take advantage of affordable homebuyer programs. These may require a certain amount down on the property, a class on homebuying or mortgage insurance. Often, more resources exist for first-time homebuyers.

      Government programs, such as Federal Housing Administration (FHA) and Veterans Affairs (VA) loans, may help some borrowers buy a home. Some of these allow borrowers to accept gift funds that can increase or be used for their down payment. Some states also have housing assistance programs which may help individuals and families qualify for a loan on a primary residence.

      FAQs about co-signing for a mortgage

      If you’re considering co-signing a mortgage, here are some frequently asked questions that can help clarify your role:

      Can I co-sign a mortgage if I already have one?

      Yes, you can co-sign a mortgage even if you already have one, as long as you meet the lender’s requirements.

      Does co-signing a mortgage affect my credit?

      Yes, co-signing affects your credit score since you’re legally responsible for repaying the loan.

      Can someone with bad credit co-sign a mortgage?

      Lenders have different credit requirements, so it may be challenging, depending on the situation.

      Is it a good idea to co-sign a mortgage?

      It could be beneficial, but it comes with risks. Weigh the financial implications carefully.

      Can I remove myself as a co-signer?

      Yes, but it usually requires loan modification, refinancing the mortgage or selling the property.

      Take the first step and get preapproved.

      Have questions? Connect with a home lending expert today!

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