Credit score requirements for mortgage approval depend heavily on the loan type. But the minimum score to qualify and the score you need to get the best rate are two very different numbers. On a $400,000 mortgage, the difference between a 640 and a 760 credit score can mean $200+ more per month — $72,000+ in additional cost over the life of the loan.

Minimum Credit Scores by Loan Type

How Lenders Actually Pull Your Score

This is where most consumers get confused. You check your credit score on a free app and see 715. Your lender pulls your score and sees 688. Why?

Mortgage lenders use specific FICO score versions: FICO Score 2 (from Experian), FICO Score 4 (from TransUnion), and FICO Score 5 (from Equifax). These are older FICO models that differ from the FICO Score 8 that most free credit monitoring apps use — and they often produce different numbers because they weight certain factors differently (particularly medical debt, authorized user accounts, and paid-off collections).

When you apply for a mortgage, your lender pulls all three bureau scores. They then use the middle score — not the highest, not the lowest, not the average. If your scores are 712 (Experian), 696 (TransUnion), and 724 (Equifax), your qualifying score is 712. If you're applying with a co-borrower, the lender typically uses the lower of the two middle scores.

Rate Impact by Score Tier — $400,000 Loan Example

The following estimates reflect typical mid-2026 rate differences between FICO tiers on a 30-year conventional loan. Actual rates vary by lender, loan structure, and market conditions, but the tier differentials are consistent:

Moving from the 640–679 tier to 760+ by improving your credit score before applying saves approximately $269/month and $96,752 in total interest on a $400,000 loan. That's the financial value of spending 6–12 months working on your credit before purchasing.

How to Improve Your Score in 3, 6, and 12 Months

In the Next 3 Months

• Pay down credit card balances aggressively. Credit utilization (balance ÷ limit) is the fastest-moving factor in your score. Paying a $6,000 balance down to $600 on a card with a $10,000 limit (from 60% to 6% utilization) can boost your score 30–80 points within 1–2 billing cycles.
• Dispute and resolve errors. Incorrect late payments, wrong account ownership, or outdated collection accounts can be challenged. If you win the dispute, the improvement appears in the next reporting cycle.
• Make all payments on time. Payment history is 35% of your FICO score. One on-time payment doesn't dramatically move the needle, but zero late payments is essential for maintaining or improving a score.
• Don't close old accounts. Closing a credit card reduces your total available credit (raising utilization) and can shorten your credit history. Keep unused cards open.

In the Next 6 Months

• Continue the utilization strategy across all cards — aim for under 10% on each card and under 10% aggregate.
• Ask for credit limit increases on existing cards (without hard inquiries if possible). A higher limit lowers your utilization ratio even if your balance stays the same.
• Become an authorized user on a family member's or spouse's old, well-managed card. Their credit history for that card appears on your report, potentially adding years of positive payment history and boosting your score.
• Resolve any collection accounts. Negotiate pay-for-delete agreements (getting the collection removed in exchange for payment) or confirm that paid collections are properly reported as paid.

In the Next 12 Months

• Maintain all good behaviors consistently. Credit scoring models value the duration of good behavior, not just the presence of it.
• Add a secured credit card or credit-builder loan if you have a thin credit file (fewer than 3–4 accounts). This builds your credit mix (worth 10% of your FICO score) and adds positive payment history.
• Allow derogatory marks to age. A 30-day late payment from 2 years ago hurts significantly less than one from 3 months ago. Time heals most credit wounds without any action required.

What NOT to Do Before Applying

These actions can trigger a new credit pull by your lender at any point during underwriting, potentially changing your qualifying score — and possibly your rate or approval status — after you've already locked a rate.

Common Credit Score Myths

• Myth: Checking your own credit hurts your score. False. Checking your own score is a "soft pull" and has zero effect on your FICO score. Only hard inquiries from credit applications affect your score.
• Myth: You need to carry a balance to build credit. False. Paying your balance in full each month and maintaining low utilization is optimal. You build credit history by using the card and paying it off — carrying a balance costs interest with no credit benefit.
• Myth: Higher income improves your credit score. False. Income is not a factor in FICO scoring. Your score reflects credit behavior — payment history, amounts owed, length of history, credit mix, and new credit inquiries.
• Myth: Closing old accounts helps your score. False. Closing accounts reduces your available credit (raising utilization) and may shorten your credit history. It almost always hurts your score.
• Myth: You have one credit score. False. You have dozens of credit scores across different models and different versions. Mortgage lenders use specific FICO models (2, 4, 5) that differ from what apps and banks typically show you.

Once you know your credit tier and the approximate rate you qualify for, use our mortgage calculator to see exactly what your monthly payment would be — and how much you'd save by improving your score before applying.