Your credit score is one of the most important numbers in the mortgage process. It affects whether you qualify for a loan, what interest rate you receive, and how much buying a home ultimately costs. Understanding where you stand and what each score range means for your options is essential before you start the home buying process.
Minimum Credit Score Requirements by Loan Type
Conventional Loans
- Minimum: 620 (required by most lenders)
- Good rates: 680-699
- Best rates: 760 and above
FHA Loans
- 3.5% down payment: 580 minimum
- 10% down payment: 500-579
- Note: Individual lenders often set higher minimums (lender overlays), commonly at 580-620
VA Loans
- No official VA minimum
- Most lenders require 580-620 in practice
USDA Loans
- No official USDA minimum
- Automated underwriting typically requires 640+
How Credit Score Affects Your Interest Rate
Your score does not just determine whether you qualify — it directly impacts how much you pay every month. Here is an approximation of how scores affect conventional loan rates (rates vary by market):
| Credit Score Range | Rate Premium vs. 760+ Tier | Monthly Impact on $300K Loan |
|---|---|---|
| 760+ | Best rate available | Baseline |
| 740-759 | ~+0.10% | ~$18/month more |
| 720-739 | ~+0.25% | ~$46/month more |
| 700-719 | ~+0.50% | ~$91/month more |
| 680-699 | ~+0.75% | ~$138/month more |
| 660-679 | ~+1.00% | ~$185/month more |
| 640-659 | ~+1.50% | ~$277/month more |
A difference of $277/month between 640 and 760 equals $3,324/year — and $99,720 over 30 years. That is the value of improving your credit score before buying.
What Determines Your Credit Score
FICO scores (the model used by most mortgage lenders) are calculated from five factors:
- Payment history (35%): On-time vs. late payments — the single biggest factor
- Amounts owed (30%): Credit utilization — how much of your available credit you are using
- Length of credit history (15%): How long your accounts have been open
- New credit (10%): Recent hard inquiries and new accounts
- Credit mix (10%): Variety of account types (credit cards, installment loans, etc.)
How to Check Your Credit Score
Get your free credit reports from all three bureaus at AnnualCreditReport.com. The reports themselves do not include your score, but many sources provide free FICO or VantageScore estimates:
- Many banks and credit cards include free score monitoring
- Credit Karma and Credit Sesame show VantageScore (slightly different from FICO)
- Experian’s website offers free FICO Score 8
- Some lenders pull your score during pre-qualification for free
Note: Mortgage lenders use specific FICO mortgage scores (FICO Score 2, 4, and 5) that may differ from the general FICO Score 8 you see in apps. The scores are similar but not identical.
How to Improve Your Credit Score Before Buying
Dispute Errors (Quick Impact)
Errors on credit reports are common. Incorrect late payments, wrong account balances, or accounts that are not yours can drag your score down significantly. Review all three bureau reports and dispute anything inaccurate through the bureau’s online dispute process. Resolution typically takes 30-45 days but can boost scores meaningfully.
Pay Down Credit Card Balances (High Impact)
Credit utilization (balances as a percentage of credit limits) heavily affects scores. Getting utilization below 30% across all cards, and ideally below 10%, can rapidly improve scores. Paying down a card with a $5,000 balance and $5,000 limit from 100% to 10% utilization alone can add 50-100 points in some cases.
Avoid Opening New Accounts (Protect Your Score)
Each hard inquiry when you apply for new credit temporarily lowers your score by a few points. More importantly, new accounts reduce your average account age. Do not open new credit cards, take out car loans, or apply for any financing in the months before applying for a mortgage.
Make All Payments on Time Going Forward
One missed payment can drop your score significantly. Set up autopay for minimum payments on all accounts to prevent accidental missed payments.
Become an Authorized User
If a family member has a credit card with a long history and low utilization, being added as an authorized user can inherit some of that positive history, potentially improving your score.
Keep Old Accounts Open
Closing old credit cards reduces your available credit (raising utilization) and reduces average account age. Keep old accounts open and use them occasionally to prevent closure for inactivity.
Realistic Credit Score Improvement Timelines
- Dispute errors: 30-45 days
- Pay down credit card balances: Score updates within 30-60 days of the creditor reporting the lower balance
- Rebuild after late payments: Recent late payments hurt most; older ones hurt less. Significant recovery takes 12-24 months.
- Rebuild after bankruptcy: Score improvement begins immediately after discharge but full recovery takes 2-4 years
When to Apply with a Lower Score vs. Wait
Sometimes the right move is buying now despite a moderate score. Sometimes waiting to improve the score saves more money than waiting costs in continued rent. The key calculation:
- Rate difference between your current score and target score
- Monthly savings from the better rate
- Time to realistically reach the higher score
- Rent you would pay during that waiting period
- Expected home price appreciation in your market
If home prices in your market are rising significantly, waiting to improve a score from 680 to 760 might cost more in appreciation than it saves in interest rate. Work through the math with specific numbers for your situation.
Bottom Line
The minimum credit score to buy a house depends on the loan type: 500 for FHA with 10% down, 580 for FHA with 3.5% down, 620 for most conventional loans. But the minimum is just the floor — your actual rate depends on your specific score, and the difference between 640 and 760 can be worth tens of thousands of dollars over the life of the loan. If your score is near a meaningful threshold, improving it before applying is almost always worth the time.