Fannie Mae and Freddie Mac use loan level price adjustments (LLPAs) to set mortgage pricing based on your credit score and down payment combination. Higher scores receive a better mortgage rate on this type of mortgage. Lower scores face surcharges that increase your rate. Borrowers with a score of 620 or higher may qualify for a conventional home loan, but the eligibility requirements vary by tier. Understanding these tiers helps you target the score that unlocks the most savings. Keep your credit utilization low and check all three credit bureaus for your overall credit profile before applying.

The combined impact of mortgage rate adjustments and PMI differences creates enormous cost variations. A borrower at the 620 level pays roughly $400 to $500 more per month than someone at 760 on the same $350,000 mortgage. Over 30 years that gap exceeds $150,000 in extra costs. To qualify for a mortgage at the best tier, you need strong overall credit. Investing time to improve your credit score before you apply for a mortgage pays for itself many times over. The minimum down payment also drops as your score rises.

Private mortgage insurance is required on conventional loans when you put down less than 20%. Your credit score is the primary factor determining your PMI rate. The difference between a high and low score can add hundreds of dollars to your monthly payment. Understanding what PMI is and how it works helps you plan your costs accurately.

The PMI difference between a 760 score and a 620 score is $311 per month on a $300,000 loan with 5% down. That equals $3,732 per year in additional insurance costs alone, not counting the higher interest rate. This dual penalty makes low scores extremely expensive for conventional borrowers.

The good news is that conventional PMI is removable. Once you reach 20% equity through payments, appreciation, or both, you can request PMI cancellation. At 22% equity based on the original purchase price, your servicer must automatically remove it. This contrasts sharply with FHA loans where mortgage insurance lasts the entire loan term.

Some borrowers choose lender paid PMI where the lender covers the insurance cost in exchange for a slightly higher interest rate. This eliminates the monthly PMI payment but results in a permanently higher rate. This option can make sense for borrowers who plan to sell or refinance within five to seven years.

Your down payment and credit score jointly determine your loan pricing. Fannie Mae and Freddie Mac use a matrix that combines both factors. A larger down payment partially offsets a lower credit score, while a high score reduces the importance of a large down payment.

For borrowers with lower credit scores, putting more money down significantly improves their loan terms. A 660 score with 20% down receives much better pricing than a 660 score with 3% down. The LLPA surcharge is cut roughly in half when you increase from 5% to 20% down at the same credit score.

Learn more about down payment strategies in our down payment guide. First time buyers should explore down payment assistance programs that can help bridge the gap.

The decision between conventional and FHA financing depends on your credit score, down payment, and how long you plan to keep the loan. Each option offers distinct advantages at different credit levels.

The breakeven point between conventional and FHA shifts based on credit score. Borrowers with scores above 700 almost always save money with conventional loans over time because of removable PMI. Borrowers between 620 and 679 should run the numbers for both options to see which costs less over their expected ownership period.

For a detailed side by side analysis, read our conventional loan vs FHA comparison. Also check out FHA minimum credit score requirements to understand that alternative fully.

Jumbo loans exceed the conforming loan limits set by Fannie Mae and Freddie Mac. In 2026, the conforming limit is $806,500 for most areas and up to $1,209,750 in high cost markets. Loans above these amounts carry higher credit score requirements because they cannot be sold to the government sponsored enterprises.

Jumbo lenders have more flexibility in setting their own criteria since these loans are not sold to Fannie Mae or Freddie Mac. Some portfolio lenders may approve borrowers with lower scores if other compensating factors are strong. However, most jumbo lenders maintain higher credit standards to manage their risk.

The interest rate difference between conforming and jumbo loans has narrowed significantly in recent years. In some cases, jumbo rates are actually lower than conforming rates for well qualified borrowers. This makes jumbo loans a competitive option for high value property purchases.

Starting with mortgage pre-approval gives you a clear picture of where you stand. Pre-approval from a conventional lender confirms your credit qualifies, estimates your rate and PMI, and shows sellers you are a serious buyer.

Working with a skilled real estate agent gives you access to their professional network of lenders. Experienced agents know which lenders offer the best conventional loan programs and can recommend the right match for your credit profile.