Lender Buy Rate vs Par Rate Yield Spread Calculator

Calculate the yield spread premium (YSP) dollar amount generated when a mortgage broker quotes above the lender's buy rate. See who pays it, the rate impact on the borrower, and how it compares to origination points.

The rate at which the loan prices at 100 cents on the dollar (no credit/no points)
Rate quoted to borrower (above par = YSP / lender credit)
Percentage of loan amount paid by lender to broker (from rate sheet)
YSP / Lender Credit Dollar Amount
Rate Above Par
Loan Amount
YSP % of Loan
Monthly Payment Difference
30-Year Extra Interest Cost
Who Pays YSP
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What Is the Yield Spread Premium (YSP)?

The yield spread premium (YSP) is compensation paid by a wholesale mortgage lender to a mortgage broker when the broker delivers a loan at an interest rate above the "par rate" — the rate at which the loan prices at exactly 100 cents on the dollar in the secondary mortgage market. For every 0.125% a broker adds above par, the lender pays roughly 0.25-0.50% of the loan amount as YSP. On a $400,000 loan with 1% YSP, the lender pays $4,000 to the broker at closing. The borrower pays this cost indirectly through a higher interest rate over the life of the loan — often tens of thousands of dollars more in total interest than at the par rate. Source: CFPB, 12 CFR §1026.36; cfpb.gov. Last updated: May 2026.

YSP vs Lender Credits vs Discount Points

StructureRate vs ParClosing CostsMonthly PaymentBest For
Discount Points (below par)LowerHigher (borrower pays)LowerLong-term holders
Par Rate (zero points/credits)At parStandardStandardNeutral position
Lender Credits / YSP (above par)HigherLower (lender pays some)HigherShort-term holders, cash-constrained buyers

How to Use YSP Knowledge as a Borrower

Since the Dodd-Frank Act reforms (2010), mortgage brokers must disclose their total compensation — including any lender-paid component — on the Loan Estimate (LE) and Closing Disclosure (CD) under CFPB Regulation Z. As a borrower, you should request Loan Estimates from at least 3 lenders and compare: (1) the interest rate, (2) the APR (which includes origination fees amortized over the loan term), and (3) the origination charges in Section A of the LE. A higher lender credit means a higher rate. There is no inherently bad choice — the right answer depends on how long you plan to keep the loan. If you plan to sell or refinance within 5 years, lender credits can lower upfront costs efficiently. If you plan to keep the loan for 10+ years, paying points (buying down below par) saves more total interest. Source: CFPB "Know Before You Owe" mortgage initiative, cfpb.gov.