You shop three lenders with identical credit, income, and property details, yet you receive three different rate quotes. The difference rarely stems from the base pricing grid—most lenders pull from the same investor rate sheets—but from the overlays each institution adds on top.
How mandatory adjustments work uniformly
Every conforming loan carries loan-level price adjustments that apply the same way across lenders. A 15% down payment on a single-family home with a 720 credit score triggers the same LLPA hit whether you close with Lender A or Lender Z. These mandatory adjustments—expressed in percentage points or basis points—flow from the agencies and layer onto the base note rate. They are not negotiable and do not vary by lender.
Where lender overlays create divergence
Overlays are risk filters each lender imposes beyond the minimum investor requirement. Common overlays include credit-score floors above the program minimum, reserve requirements exceeding guideline standards, property-type restrictions, and lock-period premiums. One lender may accept a 620 score on a conventional loan while another sets a 640 floor. A third might accept 620 but charge an additional adjustment for any score below 680. None of these overlays appear on the mandatory LLPA grid; each is discretionary.
A single borrower, three quotes
Consider a borrower with a 680 credit score purchasing a single-family home at 90% LTV. The mandatory LLPA for that profile is 2.25%. Lender A applies no additional overlay and quotes 6.50%. Lender B imposes a 0.50% overlay for scores below 700 and quotes 6.75%. Lender C sets a minimum 700 score for that LTV and declines the loan entirely. The borrower sees three outcomes from the same facts. These figures are illustrative; rates and products are subject to change and this is not a commitment to lend.
Other overlays compound the effect. A lender may require six months of reserves instead of two, or restrict cash-out refinances on condominiums, or add premium for a 60-day lock when competitors charge only for 45-day or longer. Each adjustment moves the final price without touching the base rate sheet.
The Alliance take
Understanding overlay structure explains why rate shopping produces a range rather than a single number. Asking "What's your rate?" without a full profile review yields an incomplete answer. The broader lesson: compare not only the rate but the qualifying rules behind it. A lender quoting lower may also carry tighter overlays that disqualify your scenario on a technicality another lender would approve.
Alliance works within the overlay frameworks our investor partners set, and we make those requirements clear during application review. We cannot guarantee any rate or approval without a complete file, but we can walk you through how overlays affect your specific profile. Start an application to see where your scenario lands across the programs we broker.