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Why can new credit affect a mortgage?

New debt can change the credit score, monthly obligations, debt-to-income ratio, cash available for closing, and the accuracy of the approved application. Credit and liabilities may be verified again before closing.

Which actions deserve a conversation first?

Ask before applying for a vehicle loan or lease, furniture financing, a credit card, a personal loan, a buy-now-pay-later account, a co-signed obligation, or a credit-limit increase that requires an inquiry.

  • Opening or closing a credit account
  • Financing a vehicle, furniture, or appliances
  • Co-signing for another person
  • Moving large balances between accounts
  • Missing or delaying a payment
  • Changing employment or compensation

What if the purchase is necessary?

Explain the need, price, expected payment, timing, and how it will be paid. The mortgage team can recalculate the file and explain the risk before you commit.

What should happen after an accidental change?

Tell the mortgage team promptly. Provide accurate documents and allow the file to be reviewed. Hiding a new obligation can create a larger problem than addressing it early.

Frequently asked questions

Questions borrowers ask about credit events and qualification

Can I use a credit card during the mortgage process?

Ordinary use may still affect balances and minimum payments. Avoid unusual charges and ask before a material purchase.

Can I buy furniture before closing?

It is safer to wait. Financing or a large cash purchase can change debt or verified funds.

Does co-signing count as debt?

It can. Treatment depends on the obligation, payment history, program, and documentation.

Should I close unused cards?

Not without discussing it first. Closing an account can change available credit and the credit profile.

Primary references

Sources used for “What to Do Before Opening New Credit During a Mortgage”

  1. Get a preapproval letterConsumer Financial Protection Bureau · Accessed August 12, 2026
  2. Create a loan application packetConsumer Financial Protection Bureau · Accessed August 12, 2026

Source set last reviewed August 12, 2026. Property, program, and lender details should be rechecked for the current transaction.