Financial research concept

Mortgage Gain-on-Sale Margin

measures mortgage gain-on-sale economics relative to net rate lock volume under the issuer's stated calculation.

By Lee BaileyPublished Sep 26, 2026

Research context

See what supports this page, how current it is, and where comparable or historical context is available.

Research date: Sep 26, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context: 17 connected conceptsPart of the reviewed Mortgage Origination & Servicing Economics; issuer definitions remain distinct where disclosed.
Company examples: 1 reviewed companyRelationships reflect supported examples, not a normalized cross-company KPI ranking.

Rocket Companies example
Formula and interpretation
What the ratio does not show
Part of the Mortgage Origination & Servicing Economics
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mortgage gain-on-sale margin measures mortgage gain-on-sale economics relative to net rate lock volume under the issuer's stated calculation.

Rocket Companies example

Rocket Companies reported a 2.83% gain-on-sale margin for 2025.

Formula and interpretation

Rocket calculates the measure as gain on sale of loans, net, divided by net rate lock volume. It connects loan-sale economics with the locked production base that generated those loans.

What the ratio does not show

A higher gain-on-sale margin does not automatically mean higher mortgage profitability. Origination expense, marketing, compensation, channel mix, hedging, servicing-retention choices, loan mix, and market conditions can move separately.

Primary source: Rocket Companies 2025 Form 10-K.

Part of the Mortgage Origination & Servicing Economics

Connect rate-lock conversion, channel production and market capture, gain-on-sale economics, servicing retention, servicing-platform scale, mortgage servicing rights valuation, delinquency, and client retention.

Browse the full operating model in Company Analysis →

Where this concept fits

Rate locks, closings, and gain-on-sale economicsCurrent relationship
Net rate lock volume is the fallout-adjusted locked pipeline, closed-loan volume is funded production, gain-on-sale margin connects loan-sale economics to the lock denominator, and servicing-retained mix determines how much production also creates continuing servicing exposure.
Closed Loan Origination VolumeGain-on-Sale MarginCurrent conceptNet Rate Lock Volume Servicing-Retained Production Mix
Channel mix and mortgage-market capture
Direct-to-consumer and Partner Network production split funded originations by acquisition channel, while purchase and refinance market shares show competitive capture within two mortgage markets that can have very different rate and housing-cycle sensitivity.
Closed Loan Origination Volume Direct-to-Consumer Origination Volume Partner Network Origination Volume Purchase Market Share Refinance Market Share
Servicing scale, MSR value, and portfolio durability
Total serviced UPB and loan count measure platform scale; owned-MSR UPB and subserviced UPB separate economic ownership from servicing workload; average loan amount links balance and account scale; MSR fair value and its multiple frame valuation; and delinquency plus client retention show portfolio servicing burden and relationship durability.
MSR Fair Value MSR Fair Value Multiple MSR Serviced UPB Net Client Retention Rate Servicing Average Loan Amount Servicing Delinquency Rate Subserviced UPB Total Loans Serviced Total Serviced UPB

See It in Company Research

These companies are examples of how the concept is reported or discussed in public filings. Definitions can differ by issuer; these links open company research rather than a normalized metric comparison.

RKTOpen operating-model research →17 of 17 reviewed concepts in Mortgage Origination & Servicing EconomicsRate locks, closings, and gain-on-sale economics4 of 4 bridge concepts supportedContinue through this bridge:Closed Loan Origination Volume Net Rate Lock Volume Servicing-Retained Production Mix

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