VantageScore 4.0 and Mortgage Pricing: The Hidden LLPA Penalty
By Sam Alpert, President and Mortgage Loan Originator, NMLS #1961555
VantageScore 4.0 is now open to every GSE lender. It saves you a few hundred on the credit report and can cost you thousands on the rate. Here is the math.
As of September 2026, Fannie Mae and Freddie Mac accept VantageScore 4.0 from every approved lender, not just a handful with prior written approval. The headlines are calling it the end of the FICO monopoly. The part nobody is putting in the headline is that the GSEs price VantageScore 4.0 worse than they price FICO, and for a lot of borrowers that erases the savings several times over.
Here is what actually changed, and what it costs.
What changed with VantageScore 4.0 in September 2026
Fannie Mae's Lender Letter LL-2026-06, effective September 9, 2026, opened VantageScore 4.0 to all approved lenders underwriting through Desktop Underwriter 12.1. Lenders no longer need prior approval to use it.
Three practical conditions came with it:
• The lender has to request VantageScore 4.0 from all three repositories when ordering a new report.
• The same score model has to apply to every borrower on the loan, no mixing.
• Manually underwritten loans still require Classic FICO.
That last one matters more than it sounds. If your file needs manual underwriting, this whole conversation does not apply to you.
Does VantageScore 4.0 save you money on a mortgage?
On the credit report, yes, usually a couple hundred dollars. On the loan, often no. For many borrowers the pricing penalty on the back end costs several thousand dollars more than the report saves up front.
Credit report costs have climbed hard over the last few years, and that is a real friction point. But a one-time savings on a report does not change your debt-to-income ratio, does not change your monthly payment, and does not change what you qualify for. The rate does.
How VantageScore 4.0 and FICO actually score you differently
Classic FICO reads a snapshot. It looks at your credit utilization on the exact day the report is pulled. Carry an unusually high card balance that week and your score takes the hit. It also cannot score people who have not used traditional credit in the last six months at all.
VantageScore 4.0 reads a trend. It analyzes a rolling 24 months of balances and behavior instead of one day, and it factors in alternative data like rent and utility payment history. VantageScore says this makes roughly 33 million previously unscoreable consumers scoreable.
Because it rewards a good trajectory instead of punishing a bad pull day, VantageScore numbers often come back higher than FICO for the same borrower. That is exactly where the trap opens up.
The 20-point adjustment nobody is talking about
The GSEs have not seasoned VantageScore 4.0 against decades of actual mortgage default data the way they have with FICO. So rather than granting pricing parity, they built in an offset.
Price adjustments designed for FICO get applied to VantageScore 4.0 at 20 points higher.
What that means in practice:
Top-tier purchase pricing on FICO starts at 780.
The same tier on VantageScore 4.0 starts at 800.
So a borrower who pulls a 780 VantageScore, a number that reads as excellent credit anywhere else, gets priced as if they were a 760. That drops them a tier and triggers a bigger loan-level price adjustment.
What the penalty actually costs
Lenders do not absorb LLPA hits. They get passed to you, usually as a higher rate.
The actuarial firm Milliman ran the comparison and found that in roughly 40% of cases, borrowers get cheaper pricing on Classic FICO than on VantageScore 4.0. Two examples from the published grid analysis:
Scores 700 to 719 at 75 to 80% LTV: about 0.375 percentage points of additional LLPA.
Cash-out refinances, scores 680 to 699 at 70 to 75% LTV: up to 1.125 percentage points of additional LLPA.
To show what even a small version of that does, take a $400,000 loan over 30 years and assume the tier drop moves your rate by an eighth of a point:
| Monthly P&I | Lifetime interest | |
|---|---|---|
| 6.500% | $2,528.27 | $510,177.95 |
| 6.625% | $2,561.24 | $522,047.78 |
| Difference | $32.97 | $11,869.83 |
That is an eighth of a point. The 700 to 719 example above is three times that.
An illustration, not a quote. Your actual rate depends on your full profile, the loan program, the property, and the market that day.
Saving $250 on a credit report to spend eleven thousand on interest is not a win.
Should you ask your lender to use VantageScore 4.0?
Usually no, not right now, and you should not have to ask. A good lender runs the comparison for you.
Alternative data is a genuinely good idea. Scoring people on rent and utility history is a real step forward for thin-file buyers, and for borrowers who cannot get a Classic FICO score at all, VantageScore 4.0 is not a worse option, it is the only option. That group should absolutely use it.
For everyone else, the question is not which model is philosophically better. It is which one prices your specific file cheaper today. Until the backend grids align, that answer is Classic FICO more often than not.
What to ask your loan officer
If you are shopping right now, two questions:
Which credit score model are you running my file on?
Have you priced it both ways?
Any lender who cannot answer the second one is not looking out for your pricing.
Sam Alpert is President and Mortgage Loan Originator at Spring Home Company, an independent mortgage brokerage in Toms River, New Jersey, licensed in New Jersey, Pennsylvania and Texas. Company NMLS #2741914. Individual NMLS #1961555. Reach him at hello@springhome.co or 732-908-8040.
This article is for informational purposes only and is not a commitment to lend, a rate quote, or financial advice. Pricing examples are illustrations. Rates, terms, LLPAs and program guidelines change without notice and vary by borrower, property and lender.