How Co-Signed Debt Impacts Your Mortgage

🧾 Why This Matters

You agreed to help someone out—co-signing a car, backing a business loan, being the financial MVP. 🏆

But when it’s time to buy a home, that “favor” can suddenly show up like an uninvited guest in your mortgage file. Lenders don’t just look at what you pay—they look at what you’re responsible for. And that can shift your entire approval strategy.

📊 How Co-Signed & Personally Guaranteed Debts Affect DTI

Debt-to-income ratio (DTI) is one of the biggest drivers of loan approval. It’s the comparison between your monthly income and your monthly obligations.

Here’s the catch:

• If your name is on the debt, it typically counts against you—even if you’re not the one making the payments.

• This includes:

  • Co-signed auto loans

  • Student loans for kids or family

  • Business loans with a personal guarantee

  • Credit cards tied to a business but reported on your personal credit

From an underwriting perspective, the thinking is simple:
👉 If the primary payer stops paying, you’re legally on the hook.

So that payment gets factored into your DTI unless you can prove otherwise.

🧠 When Can You Remove These Debts from DTI?

Good news—there are ways to exclude these payments. But you’ve got to meet some pretty specific guidelines.

For Co-Signed Debts:
Most loan programs (FHA, Conventional, VA) allow removal if:

• The other party has made at least 12 months of consecutive payments

• Payments were made from their account (not yours)

• There are no late payments during that time

For Business Debts (Personally Guaranteed):
This one gets a little trickier:

• If the business pays the debt, you may be able to exclude it

• BUT… underwriters will review business tax returns

• If the debt shows up as a liability tied to business income, they may still count it

• If business income is declining or inconsistent, expect more scrutiny

👉 Translation: just because the business pays it doesn’t automatically mean it disappears.

🗂️ How to Make This Easy for Underwriting (and Avoid Headaches)

Underwriters love one thing: clean, clear documentation. Make their job easy, and your loan glides through.

Here’s how to set yourself up for success:

• Provide 12 months of bank statements from the account making the payments

• Highlight the payments so they’re easy to track (don’t make them play Where’s Waldo 🕵️‍♂️)

• Match payment amounts to the liability on the credit report

• Include a letter of explanation outlining:

  • Who the primary payer is

  • Your relationship to them

  • Confirmation you are not making the payments

• For business debts:

  • Provide business bank statements

  • Be ready with tax returns showing how the debt is handled

  • Work with your lender early to structure it correctly

⚠️ Common Pitfalls to Avoid

This is where deals can wobble if we’re not careful:

• Assuming “I don’t pay it” = it won’t count

• Missing even one late payment in that 12-month history

• Transferring money between accounts (can make it look like you paid it)

• Waiting until you’re under contract to sort it out

A little planning here can be the difference between “clear to close” and “we need to talk…” 😬

🐼 The Mama Bear Takeaway

Helping others is admirable—but when it comes to buying a home, we’ve got to protect your approval first.

The earlier we identify these debts, the more options we have to structure things the right way and keep your buying power strong.

💬 Want to Know If This Will Hurt Your Approval?

I’ll break down your situation, show you exactly how it’s impacting your buying power, and map out a game plan to fix it.

Fill out the information below and input DTI in the message and we can work on a game plan for success!