Published:
September 30, 2020
Last updated:
August 17, 2026
What To Do Before Co-Signing A Mortgage For Your Child

Key Takeaways

  • Co-signers must qualify with their own income, credit, assets, and debts.
  • A co-signed mortgage adds to your debt and can reduce future borrowing power.
  • Co-signing means you may have to make the mortgage payments if the primary borrower cannot.
  • Protect yourself with payment monitoring, estate planning, and a plan for future refinance costs.
In This Article

Parents often think about co-signing a mortgage when an adult child is close to qualifying for a home loan but needs help with income, credit, or overall approval strength. Co-signing can help, but it also means you are taking on real responsibility for the debt and putting your own credit and future borrowing power on the line.

Before you agree, it is important to look closely at your finances, the risks you would be accepting, and what would happen if your child could not make the payments. If you are considering helping your child buy a home in Washington, Oregon, Idaho, or Colorado, these are some of the most important things to review first.

1. Look At Your Own Qualifications

Remember that co-signers are going to go through the same vetting process as the primary borrower. This includes your income, credit history, assets, debts, and credit score, all of which will be scrutinized. It might be a while since you’ve had to go through the mortgage application and approval process.

Be sure to take a look at your own qualifications. In order for you to successfully be able to serve as a co-signer, your financial health will be scrutinized by the lender. As such, you will want to make sure that your income, assets, debts, and credit score are all in order first. If not, you may be out of luck. Otherwise, you may want to take some time to improve your own financial profile before considering being a co-signer for anyone.

2. Consider the Position You’ll Be in

Remember that any mortgage, including acting as a co-signer, will be an outstanding debt. As such, you will be adding more debt to your current pile. Even though your child is buying a home in WA, CO, ID, or OR, your name is on the mortgage. And as a result, this debt will be included in your overall debt.

While some debt is fine, too much can put a damper on your credit. If your debt is so high after co-signing that your debt-to-income ratio is significantly compromised, then you might want to reconsider being a co-signer. The added debt might make it hard for you to refinance in the future.

3. Think About Paying The Loan

The point of being a co-signer is that you are basically guaranteeing to make the mortgage payments if your child is no longer able or willing to make the payments themselves for whatever reason. The mortgage lender is agreeing to extend a mortgage to your child because you are promising to take over in case your child defaults.

While nobody wants to think about their child being unable to pay back the loan, there is always the chance that this may happen. Therefore, think about what would happen if you need to step in and make these payments. If you cannot handle the burden of having that additional co-payment, you may want to think twice about co-signing. Failing to make these payments will not only hurt your child’s credit score but yours as well.

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4. Protect Yourself

As a co-signer, it will be important to protect yourself before signing on the dotted line. First, be sure to do some estate planning with your child. You should encourage your child to take out a life insurance policy.

While no parent wants to think about burying their child, if something happens to him or her, the co-signers are going to be on the hook for the rest of the loan. Furthermore, be sure to monitor the loan payments as well. Sign up for email or text alerts to make sure payments are being made on time.

5. Plan Ahead

Many parents are going to reflexively act as a co-signer for their child; however, it is important to plan ahead. Be sure to think about all possibilities and make sure that both you and your child are ready to handle an added loan payment. Being proactive and thinking of all the possible outcomes of what may happen in the future is essential.

This will protect both you and your child. As an example, if your goal is to have your child refinance you off of the loan when they are able to qualify on their own, you need to be prepared to pay excise tax in many places around the country such as Washington State. This tax can run several thousand dollars depending on the size of the mortgage, so it’s something you want to prepare for ahead of time.

If you are interested in buying a new home or refinancing your current property in Washington, Oregon, Idaho, or Colorado, be sure to consult with your trusted home mortgage professional.

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Have Questions About Mortgages?

Sammamish Mortgage can help. We serve clients across Washington, Idaho, Colorado, Oregon, and California. Since 1992, we’ve been providing several mortgage programs and products with flexible qualification criteria to borrowers across the Pacific Northwest. If you are deciding whether co-signing is the right path for helping your child buy a home, visit our website to get an instant rate quote or to use our online mortgage calculator. Or, reach out to us if you want to review your options or are ready to get pre-approved for a mortgage.

FAQs

Should parents co-sign a mortgage for an adult child?

Parents may choose to co-sign when an adult child is close to qualifying but needs help with income, credit, or overall approval strength. Before agreeing, it is important to review your own finances, the risks you would be accepting, and whether you could handle the payments if your child could not.

What is the downside to co-signing a mortgage?

Co-signing puts your own credit and future borrowing power on the line. The mortgage also counts as debt tied to your name, which can affect your debt-to-income ratio and make it harder to refinance or qualify for other loans later.

Does co-signing a mortgage make me responsible if my child stops paying?

Yes. A co-signer is effectively guaranteeing the loan. If your child is unable or unwilling to make the mortgage payments, the lender can expect you to step in and pay.

Will lenders review my finances if I co-sign a mortgage?

Yes. Co-signers generally go through the same vetting process as the primary borrower. Lenders may review your income, credit history, assets, debts, and credit score before approving the loan.

Will co-signing a mortgage affect my debt-to-income ratio and ability to borrow later?

Yes. Because the mortgage is an outstanding debt connected to your name, it can raise your debt-to-income ratio. That may reduce your borrowing flexibility and could make it harder to refinance or take on new debt in the future.

How much can a co-signer help on a mortgage?

A co-signer can strengthen a loan application when the main borrower is close to qualifying but needs added support with income, credit, or overall approval strength. The exact impact depends on the lender’s review of the full application.

Can my dad or another parent co-sign on my mortgage?

Yes, a parent may be able to co-sign if the lender accepts the arrangement and the parent meets the lender’s qualification standards. The parent should understand that co-signing creates real responsibility for the debt.

Can I be removed from a mortgage I co-signed for my child later?

Possibly, but it usually requires planning ahead. A common goal is for the child to refinance into a new loan once they can qualify on their own. In some places, including Washington State, removing a co-signer through a later transfer or refinance may involve excise tax, so it is wise to prepare for that possibility in advance.

Are there tax implications of co-signing a mortgage for a child?

There can be costs to consider depending on how the loan is changed later. For example, if the plan is for your child to refinance you off the loan when they qualify independently, some areas such as Washington State may impose excise tax, which can add meaningful expense.

Are there alternatives to co-signing a mortgage for an adult child?

One practical alternative is to wait and improve the borrower’s financial profile before applying again. Another is to set a clear plan so the child can qualify on their own later rather than relying on a long-term co-signing arrangement. A trusted mortgage professional can help review available options in Washington, Oregon, Idaho, or Colorado.