Depending on your personal financial circumstances, co-signing a mortgage for someone else can make it more challenging to qualify for your own mortgage or reduce the loan amount you can afford.
If you co-sign on a mortgage for another person before you buy your own home then the total monthly housing expense including the mortgage payment, property tax and homeowners insurance for that property is included in your debt-to-income ratio when you apply for your own mortgage. This requirement applies even if the other borrower occupies the property and pays all or part the monthly housing expenses, including the mortgage payment.
Because of this guideline, if you co-sign a loan for someone else, you need to earn sufficient income to afford the mortgages on two properties when your apply for your own loan. For example, if the total monthly housing expense for the mortgage you co-sign is $2,500, then this figure is added to your monthly debt expense for your own loan application.
If you have $500 in other debt expenses for credit cards and car, personal and student loans, then the total monthly debt figure the lender includes in your debt-to-income ratio is $3,000 ($2,500 (expenses for co-sign house) + $500 (personal debt expenses) = $3,000).
If you make a lot of money then including the additional housing expense may be less of an issue as you still may be able to afford the mortgage amount you want. But if you are on the border in terms of qualifying for your own loan, then the extra debt expense could disqualify you or prevent you from getting the mortgage you need.
Use ourHOW MUCH HOME CAN I AFFORD CALCULATORto determine what price home you can afford based on your monthly gross income and debt payments
If you are not a co-signer on the other mortgage then the lender only includes your $500 in personal debt payments to determine the mortgage you qualify for. In short, the lower your monthly debt expense, the higher the mortgage amount you qualify for and vice versa
This is why co-signing a loan for someone else usually reduces what size loan you can afford on your own, depending on how much money you make, and why we usually recommend that you buy your own home first before you co-sign a mortgage for a relative or friend.
One question people frequently ask is why do lenders include the full monthly payment for the mortgage I co-sign instead of only half of the payment? After all, there may be other borrowers who help pay the mortgage. This is because if the other co-borrower experienced financial hardship you are solely responsible for paying the mortgage and the lender’s qualification analysis reflects this worst case scenario.
Another common question is what happens if the other co-signer pays half the mortgage payment or pays me rent? Lenders typically only allow you to include rental income if you can provide tax returns that show you have received the income for at least two years, although some programs only require a one year rental history, depending on certain circumstances.
If you cannot document a track record of rental payments directly to you, then lenders are unlikely to give you credit for this income. For example, if you split the monthly mortgage payment with another borrower, but the payments are made directly to the lender, you receive minimal benefit when you apply for your own mortgage.
We always recommend that you contact multiple lenders to confirm their qualification guidelines, especially as they pertain to co-signers. Comparing multiple lenders is also the best way to save money on your mortgage.
You can also use our Mortgage Pre-Approval form to get pre-approved for your loan. Getting pre-approved enables you to understand what size mortgage you qualify for and review key issues in advance such as the impact of being a co-signer on another loan. Our Pre-Approval form is easy-to-use, no obligation and requires minimal information.
In closing, co-signing a mortgage can be very beneficial in helping someone else buy a home but be sure to understand the consequences and potential negatives, especially if you want to apply for for your own mortgage in the future.
Mortgage Co-Signer Guidelines: https://www.fanniemae.com/content/guide/selling/b2/2/04.html