When you lock a mortgage rate, you're not simply choosing from a menu. Behind the scenes, Fannie Mae and Freddie Mac use a matrix of loan-level price adjustments—LLPAs—that add or subtract basis points from base pricing based on your credit score, loan-to-value ratio, property type, occupancy, and loan purpose. A single deal can carry three or four adjustments that stack together, sometimes in surprising ways.
How the LLPA grid works
Fannie and Freddie publish tables that cross-reference credit-score bands (620–639, 640–659, 660–679, 680–699, 700–719, 720–739, 740–759, 760+) with LTV buckets (60.01–70%, 70.01–75%, 75.01–80%, 80.01–85%, 85.01–90%, 90.01–95%, 95.01–97%). Each cell shows a percentage of the loan amount—expressed in basis points—that the lender pays (or receives) when selling the loan on the secondary market. A 0.500% adjustment on a $400,000 loan equals $2,000 in cost, which flows through to you as a higher rate or higher fees.
Additional overlays apply for cash-out refinances, investment properties, two-to-four-unit buildings, manufactured homes, high-balance loans, and certain condominium project types. These adjustments are cumulative. A borrower with a 720 score, 85% LTV, and a single-family primary residence might face a 1.125% hit, while the same score at 90% LTV could see 1.750%. These figures are illustrative; rates and products are subject to change and this is not a commitment to lend.
Why a higher credit score doesn't always win
LLPAs are non-linear. A 740-score borrower putting 15% down (85% LTV) can face a steeper adjustment than a 780-score borrower at 10% down (90% LTV), because the grid penalizes certain LTV ranges more heavily than marginal score differences reward. Drop below 25% equity and adjustments accelerate; cross into high-balance territory and another layer stacks on top. This is why side-by-side rate quotes from two lenders can show identical note rates yet wildly different closing costs—one lender may be absorbing part of the LLPA as a lender credit, while the other passes it straight through.
Why closing costs vary between identical rates
Rate and price are a seesaw. If you want a lower rate, the lender buys down the price by paying discount points; if you want lower closing costs, the lender offers a lender credit in exchange for a higher rate. LLPAs shift the fulcrum. Two borrowers with different LLPA profiles can lock the same rate, but one will need more points to get there. Always compare the top section of the Loan Estimate—loan amount, rate, monthly payment, and cash to close—across multiple lenders, not just the advertised rate.
The Alliance take
LLPAs are baked into conforming-loan pricing; you can't avoid them, but you can optimize around them. Sometimes an extra five percent down moves you into a cheaper LTV band and saves more than the cash deployed. Other times paying down rate with points is cheaper than the LLPA cliff you'd hit by stretching LTV. Run the numbers with your loan officer, ask for itemized pricing breakdowns, and compare at least two Loan Estimates before you lock. Start an application to see where your scenario lands on the grid.