What credit score do I need for a mortgage?

There is no single number. Minimums differ by loan program and lender, and lenders may apply their own overlays above program minimums. Score also interacts with down payment, debt-to-income ratio and reserves. Ask lenders what they require for the specific program you want.

How long does it take to improve a credit score?

It varies. Utilization changes can be reflected once issuers report updated balances, often within a billing cycle or two. Payment history and account age improve slowly. Most negative items generally remain on a report for up to seven years, and certain bankruptcies up to ten.

Do mortgage lenders use the same score I see in my app?

Often not. Mortgage underwriting commonly uses specific score versions pulled from all three nationwide credit bureaus, which can differ from the free consumer-facing score you see elsewhere.

Will shopping for a mortgage hurt my score?

Credit scoring models generally treat multiple mortgage inquiries made within a short shopping window as a single event. Check the guidance for the scoring model your lender uses, and keep your rate shopping concentrated.

Should I pay off all my credit cards before applying?

Lowering revolving balances often helps utilization, which is a significant scoring factor. Closing accounts, however, can reduce total available credit and shorten average account age. Many borrowers pay balances down and leave the accounts open.

Can I dispute errors on my credit report?

Yes. Under the Fair Credit Reporting Act you can dispute inaccurate information with the credit bureau and the furnisher, and they generally must investigate. You can get free reports through AnnualCreditReport.com.

Does a higher score guarantee approval?

No. Credit score is one input. Underwriters also review income, employment, assets, debt-to-income ratio, the property and the loan program. No score guarantees approval or a specific rate.

How to Improve Your Credit Score for a Mortgage

The short answer

To strengthen your credit before a mortgage application, focus on what actually moves the needle and what you can influence in the time you have:

Pay every account on time. Payment history is the most heavily weighted factor in widely used scoring models.
Lower credit card utilization before statements close, since issuers usually report the statement balance.
Pull all three credit reports and dispute genuine errors through AnnualCreditReport.com.
Stop opening and closing accounts in the months before applying.
Fix debt-to-income at the same time — underwriters weigh it alongside score.

No specific score increase can be promised, and no score guarantees approval. Estimate where you stand with the Credit Utilization Calculator and the DTI Calculator.

Why credit score matters in mortgage underwriting

Lenders use credit history to estimate the likelihood of repayment. Score affects three things:

Eligibility — whether you meet the program's and lender's credit requirements.
Pricing — the rate and, for conventional loans, risk-based price adjustments.
Mortgage insurance cost — private mortgage insurance premiums on conventional loans are generally priced by score and loan-to-value.

Score is not evaluated alone. Underwriters review income stability, assets and reserves, debt-to-income ratio, the property appraisal and the specific loan program. A strong score with a weak DTI can still be declined, and the reverse is also true.

What goes into the score

Widely used scoring models weigh the same broad categories, though the exact weighting varies by model and version:

Factor	What it reflects	How quickly it can change
Payment history	Whether accounts were paid as agreed	Slowly; late marks persist for years
Amounts owed / utilization	Balances relative to limits	Quickly, once new balances are reported
Length of credit history	Age of oldest and average accounts	Very slowly
New credit	Recent inquiries and new accounts	Improves as inquiries age
Credit mix	Revolving and installment experience	Slowly; rarely worth forcing

Payment history

One 30-day late payment can matter more than several months of good behavior, and the impact is generally larger the more recent it is. Set autopay for at least the minimum on every account. If you have already missed a payment, bringing the account current stops further damage even though the historical mark remains.

Credit utilization

Utilization is the balance on revolving accounts divided by the limit, measured both per card and overall:

Utilization = reported balance / credit limit

Most issuers report the statement balance, not the balance after you pay. Paying before the statement closes is what changes the reported figure. Lower is generally better, and carrying a balance is not required to build credit.

Model your own numbers in the Credit Utilization Calculator.

Length of history and new credit

Opening a new card shortens your average account age and adds an inquiry. Closing an old card removes its limit from the utilization math and can eventually shorten history. In the six to twelve months before a mortgage, the safer posture is to keep existing accounts open and quiet.

Check your credit reports first

Before optimizing anything, look at the data lenders will see.

Request your reports from all three nationwide bureaus at AnnualCreditReport.com, the federally authorized source for free reports.
Check names, addresses, account statuses, balances, limits, late marks and any accounts you do not recognize.
Dispute anything inaccurate. Under the Fair Credit Reporting Act, you can dispute with the credit bureau and with the company that furnished the information, and they generally must investigate within the statutory timeframe.
Keep documentation of everything you send and receive.

Errors are worth hunting for because correcting one can change eligibility in a way no amount of budgeting can.

A realistic timeline

Suppose you plan to buy in about a year.

Timeframe	Focus
12 months out	Pull all three reports, dispute errors, set autopay, stop applying for new credit
6–9 months out	Pay revolving balances down steadily; avoid large new purchases on cards
3–6 months out	Keep utilization low every statement cycle; leave accounts open; build reserves
1–3 months out	Get preapproved, keep employment and deposits stable, avoid new tradelines
During underwriting	Change nothing — no new credit, no large unexplained deposits, no job changes if avoidable

Some changes show up fast; others do not. Utilization improvements often appear once the next statement is reported, while payment history and account age recover only with time.

Program differences worth knowing

Credit expectations differ by loan type, and lenders can apply stricter standards than the program itself — commonly called overlays.

Conventional loans are priced with risk-based adjustments, so score and down payment interact directly with the rate and with PMI cost.
FHA loans are insured by the Federal Housing Administration and generally allow more flexible credit profiles, with mortgage insurance required. See FHA loan requirements and FHA vs. conventional.
VA and USDA loans have their own eligibility rules, and lenders set their own credit standards within them.

Ask each lender for the minimum score for the exact program and the pricing at your score band, rather than assuming a general figure applies.

Mistakes that derail mortgage applications

Opening a store card or financing furniture before closing. New debt changes DTI and adds an inquiry.
Closing old cards to "clean up" credit, which can raise utilization.
Paying after the statement date and wondering why utilization did not improve.
Letting a small medical or subscription bill go to collections.
Co-signing for someone else during the process.
Making large, undocumented deposits, which underwriters must source.
Credit repair promises. The Federal Trade Commission warns that no one can legally remove accurate, timely negative information, and companies may not charge before delivering services.

Credit Utilization Calculator — overall and per-card ratios
Credit Score Improvement Calculator — projected effect of lower utilization and on-time months
DTI Calculator — front-end and back-end ratios
Mortgage Calculator — payment at different rates
Home Affordability Calculator — price range based on income and DTI

Sources and references

Consumer Financial Protection Bureau, Credit reports and scores
Consumer Financial Protection Bureau, How to dispute an error on your credit report
AnnualCreditReport.com — the federally authorized source for free credit reports
Fair Credit Reporting Act, 15 U.S.C. §1681
Federal Trade Commission, Credit repair scams

This article is general education for U.S. home buyers, not personalized financial advice. Scoring models, lender requirements and program rules vary and change over time.