Mortgage 101

What Actually Makes Up Your Credit Score

Your score isn't a random number. It's calculated from five categories, and each one tells your lender something different about the risk you carry. Know what you're being measured on before you apply.

35%
Payment History
30%
Credit Utilization
15%
Length of History
10%
Credit Mix
10%
New Credit

Your Score Is a Formula. Learn the Formula.

The most common credit scoring model used by mortgage lenders is FICO. It's a number between 300 and 850, and lenders use it to set your interest rate, determine which loan products you qualify for, and sometimes decide whether to approve you at all.

FICO doesn't calculate your score from one factor. It weighs five distinct categories of your credit behavior, each with a different level of influence on the final number. Two people can have the same score but very different profiles. A 720 built on perfect payment history looks different to a lender than a 720 built on a thin file with no missed payments but only one account.

Understanding what's actually being measured helps you manage your credit with intention, not just hope the number goes up on its own.

What FICO Actually Measures

Each category carries a different weight. The two biggest ones are also the two you have the most direct control over.

35%
Payment History
Whether you've paid your bills on time. Missed payments, collections, and bankruptcies live here. One 30-day late payment can drop a good score by 60 to 100 points, and it stays on your report for seven years.
30%
Credit Utilization
How much of your available revolving credit you're using. If your card limit is $10,000 and your balance is $3,500, your utilization is 35%. Most lenders want to see it under 30%. Under 10% is better. This is the fastest component to move.
15%
Length of Credit History
How long your accounts have been open. Older accounts help. Closing a card you've had for 10 years can hurt your score even if the balance is zero, because it shortens your average age of accounts.
10%
Credit Mix
The variety of account types on your file: credit cards, auto loans, student loans, mortgages. A mix of installment loans and revolving accounts looks better than credit cards alone.
10%
New Credit
How recently you've applied for new credit. Each hard inquiry can lower your score by a few points. Multiple applications in a short window signal risk. Avoid new credit in the 90 days before you apply for a mortgage.

A 40-Point Score Difference Can Cost You $15,000

Mortgage lenders don't set your rate based on a gut feeling. They use a pricing model called Loan Level Price Adjustments (LLPAs), which applies a rate surcharge based on your score and down payment combination.

On a $350,000 loan, moving from a 680 score to a 740 can lower your rate by 0.5% to 0.75%. That's roughly $100 to $145 less per month. Over five years, the difference is between $6,000 and $8,700 in additional interest paid by the borrower with the lower score.

The tiers that matter most for conventional loans are 620, 640, 660, 680, 700, 720, and 740. Once you're above 740, most lenders don't price you significantly better. The goal is getting into the best pricing tier, not optimizing infinitely above that threshold.

For FHA loans, the minimum is 580 for 3.5% down. For VA and USDA loans, there's no official floor, but most lenders set one around 620. Our guide on credit scores for conventional loans covers the LLPA tier differences in detail.

JSYK — Hard inquiries from mortgage lenders are treated differently than other credit applications. FICO groups multiple mortgage applications within a 45-day window and counts them as a single inquiry. You can rate shop without tanking your score.
FICO Score Range Mortgage Impact
760 and above Best pricing available
740 – 759 Near-best pricing
720 – 739 Competitive rates
700 – 719 Slightly elevated pricing
680 – 699 Rate adjustments apply
660 – 679 Meaningful surcharges
640 – 659 Higher rate, limited programs
620 – 639 Minimum for most conventional
580 – 619 FHA only (3.5% down)

Rate adjustments vary by loan type, down payment, and lender. These reflect conventional loan pricing tiers as a general reference.

Four Things That Actually Improve Your Score Before You Apply

Some of these take time. Others show results within one billing cycle. The five components tell you exactly which levers you have right now.

01
Pay Down Revolving Balances First
Credit utilization is 30% of your score and it's the fastest lever to pull. Paying a card from 60% utilization to under 10% can move your score 20 to 50 points within one to two billing cycles. Don't close the card after — that removes available credit and raises utilization on the remaining accounts.
02
Fix Anything Inaccurate on Your Report
Pull your free report from AnnualCreditReport.com and check all three bureaus: Equifax, Experian, and TransUnion. Errors are more common than most people expect. A collection from an account you never opened, a payment marked late when it wasn't, or a debt past the reporting limit. Dispute inaccuracies directly with the bureau in writing.
03
Keep Old Accounts Open
The length of your credit history is 15% of your score. Closing a card you've had for a decade lowers your average account age and removes available credit. If the card has no annual fee, leave it open. A small recurring charge keeps the account active without adding meaningful debt to your profile.
04
Don't Apply for Anything New Before Your Mortgage
New credit is 10% of your score, but the behavioral impact runs deeper than that. A new car loan, a new credit card, or any hard inquiry in the 90 days before your mortgage application signals that your financial picture is in motion. Lenders check your credit twice: at pre-approval and again before closing. New debt between those two pulls can change your approval outcome.

Not Sure Where Your Score Stands Right Now?

Before you do anything else, get the full picture on your credit file. We review your credit as part of the pre-approval process and can show you exactly which component is holding your score back, and what to do about it before you start shopping.

Credit and Mortgage Guides

These pages go deeper on the credit and approval topics that come up most often with Florida buyers.

Know Your Score. Know Your Options.

Run your numbers with us before you start shopping. You'll know exactly what you qualify for and what your rate looks like at your current score.

Jordan Vreeland, Licensed Mortgage Broker