Why It Matters
A credit score is a numerical rating — usually 300–850 — that tells lenders how likely you are to repay debt. Higher scores get better mortgage rates. Conventional loans want 620 minimum; 740+ gets you the best pricing. FHA loans go down to 580 with 3.5% down. A 50-point drop can cost you 0.25–0.5% on your rate — that's thousands over 30 years. Payment history and credit utilization are the biggest factors. Clean those up before you apply.
At a Glance
- What it is: A number (300–850) that summarizes creditworthiness based on payment history, debt levels, and other factors
- Why it matters: Lenders use it to approve or deny loans and set your interest rate — a lower score costs you money
- How to use it: Check your score 3–6 months before applying; fix errors, pay down credit utilization, avoid new credit
- Common threshold: 740+ = best rates; 620–679 = fair (higher rate); below 620 = limited options, FHA may still work at 580+
How It Works
The big three bureaus — Experian, Equifax, TransUnion — collect your borrowing history. FICO (and VantageScore) crunch that into a single number. Payment history is ~35% of the score. One 30-day late can ding you 50–100 points. Credit utilization — how much of your available credit you're using — is ~30%. Keep it under 30%; under 10% is better. Length of history, new credit, and credit mix round out the rest.
Lender tiers. Conventional mortgage lenders tier pricing by score. 760+ gets the best rate. 740–759 is close. 700–739 pays a bit more. 620–699 pays more still — maybe 0.25–0.5% higher. Below 620 and you're in FHA territory or denial. FHA loans allow 580 with 3.5% down; 500–579 needs 10% down. VA and USDA have their own floors. The point: your score directly determines your rate. A 0.5% difference on a $300,000 loan is ~$90/month — $32,000 over 30 years.
DTI interaction. Lenders also look at your DTI ratio — debt-to-income. A 780 score with 55% DTI can still get denied. Score gets you in the door; DTI determines how much you can borrow. Clean up both before you shop.
Real-World Example
Memphis duplex, 2024.
You're buying a $185,000 duplex with 5% down. Your score: 720. Rate: 6.75%. Monthly P&I: $1,127. Your buddy has a 660. Same loan, same lender. His rate: 7.25%. Monthly P&I: $1,189. That's $62/month more — $744/year. Over 30 years: $22,320 in extra interest. Same property, same down payment. The only difference: 60 points on a credit score.
If you'd paid down your cards 3 months earlier and bumped to 740, you might've gotten 6.5%. That's another $40/month. Small moves in score = big moves in cost. Check your score before you shop. Fix what you can. Then apply.
Pros & Cons
- One number summarizes your creditworthiness — lenders use it everywhere
- Improve it over time: pay on time, lower credit utilization, don't close old accounts
- Higher score = better mortgage rates = lower monthly payment and total interest
- Free access: AnnualCreditReport.com, many banks and cards offer free FICO or VantageScore
- FHA and VA offer paths for scores in the 580–620 range
- One late payment can drop you 50–100 points — recovery takes months
- Errors on your report hurt you; disputing takes time
- Score isn't everything — DTI ratio, employment, reserves matter too
- Different lenders use different score versions — FICO 2, 4, 5 for mortgages; your card might show FICO 8
- Building history takes time — thin files (few accounts) limit how high you can go
Watch Out
- Applying with errors: Pull your report 3–6 months before applying. Dispute inaccuracies — wrong accounts, paid-off debt still showing balance, identity mix-ups. Fixing errors can lift your score 20–50 points.
- High utilization: Credit utilization over 30% hurts. Pay down cards 2–3 months before applying. Don't close accounts — that reduces available credit and can raise utilization. Pay down, keep open.
- New credit before applying: Opening new cards or loans right before a mortgage application can ding your score (new credit = ~10% of FICO). Avoid new accounts 6 months before you apply.
- Rate-shopping window: Multiple mortgage inquiries within 14–45 days (depending on model) count as one. Shop lenders in a tight window so you don't get penalized for rate-shopping.
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The Takeaway
Your credit score is the number that opens — or closes — the door to mortgage approval and sets your interest rate. 740+ gets the best terms. 620 is the conventional floor. FHA goes lower. A 50-point difference can cost you thousands over the life of the loan. Check your score early. Fix errors. Lower credit utilization. Then apply.