Short answer: Start several months before applying if possible. Review all three credit reports, dispute inaccurate information, pay every bill on time, reduce revolving-card balances, and avoid opening or closing accounts without understanding the effect. No step guarantees a specific score increase or mortgage approval.
Your credit profile can affect both eligibility and the rate a lender offers. Mortgage lenders may use specialized scoring models and information from the three major credit bureaus, so a consumer score shown in an app may not match the score used for underwriting.
1. Review all three credit reports for errors
Check your reports from Equifax, Experian, and TransUnion. Look for accounts you do not recognize, incorrect late payments, wrong balances, duplicate collections, and outdated personal information. Dispute errors with the credit bureau reporting them and keep copies of your documents. Checking your own report does not create a hard inquiry.
2. Pay every account on time
Payment history is an important part of credit scoring. Set reminders or automatic minimum payments so a due date is not missed. If you are already behind, contact the creditor and ask what options are available. A new on-time streak helps build a better record over time, but accurate late payments do not disappear just because you request removal.
3. Reduce revolving balances
Credit-card balances relative to limits can influence scores. If practical, pay down revolving balances and avoid making large new purchases on credit while preparing for a mortgage. There is no universal utilization percentage that guarantees a particular score; lower reported balances can help, but results vary by file and scoring model.
4. Avoid unnecessary new credit
Do not apply for several cards, personal loans, or store financing shortly before a mortgage application. New accounts and hard inquiries can affect your profile, and a new monthly payment can change your debt-to-income ratio. Ask your loan officer before making major financial changes during underwriting.
5. Keep older accounts stable unless there is a good reason
Closing a long-standing card can change your available credit and account history. Do not close accounts simply to “clean up” your report without checking the potential impact. At the same time, never keep an account open if fees, fraud, or overspending create a bigger problem.
6. Understand the score your mortgage lender may use
The CFPB explains that mortgage lenders commonly review credit information from all three nationwide bureaus and may use a middle score in their pricing process. The exact models and rules can differ by loan type, lender, and current program requirements. Ask your lender which score model and bureau data apply to your application.
A simple 60–90 day preparation checklist
- Download and review all three credit reports.
- Dispute genuine reporting errors as early as possible.
- Bring every account current and automate due-date reminders.
- Pay down revolving balances where your budget allows.
- Pause unnecessary new credit applications and large financed purchases.
- Keep bank statements and records showing the source of funds for your down payment.
- Ask a mortgage professional to review your credit and debt profile before submitting multiple applications.
Read our related credit score needed to buy a house guide and mortgage pre-approval checklist.
If you want to review credit information from the three bureaus while preparing, SmartCredit offers a paid monitoring product. Review the current price, trial terms, cancellation policy, and product limitations directly before enrolling. Monitoring does not guarantee a higher mortgage score or loan approval.
Affiliate disclosure: SmartMortgageCalc may earn a commission if you sign up through this link, at no additional cost to you. This is an advertising relationship, not a lender endorsement.Frequently asked questions
How long does it take to improve a credit score before a mortgage?
It depends on what is affecting the report. Correcting an error or lowering reported card balances may be reflected after the relevant bureau updates, while building a consistent payment history takes longer. No timeline or point increase is guaranteed.
Should I pay off all my credit cards before applying?
Lower revolving balances can help, but do not use money needed for closing or emergency reserves without considering the full financial picture. Ask your lender how balances and cash reserves affect your application.
Does checking my own credit hurt my score?
A consumer checking their own credit report is generally a soft inquiry and does not lower the score.
Will SmartCredit show the exact mortgage score my lender uses?
Do not assume that. Mortgage lenders may use different scoring models and bureau data. Treat a consumer monitoring score as a monitoring tool, not a guarantee of the score used for underwriting.
Sources and further reading
- CFPB: Does my credit score affect my mortgage?
- CFPB: Get your money situation in order
- AnnualCreditReport.com: Official free credit reports
Financial education only—not a mortgage offer, underwriting decision, tax opinion, or legal advice. Rates, eligibility, fees, and program rules change and vary by lender and location. Verify all figures with a licensed mortgage professional and review your official Loan Estimate and Closing Disclosure. Affiliate disclosure.