Auto dealer SG&A as a percent of gross profit divides selling, general, and administrative expense by total gross profit.
Dealers often emphasize this denominator because vehicle retailing produces enormous revenue with relatively thin front-end gross margins. AutoNation reported SG&A at 67.9% of total gross profit in 2025, down from 68.2%. Penske reported 72.1%, up from 70.6%.
Dealers manage overhead against gross profit
Using revenue as the denominator can make a dealership look structurally low-cost simply because vehicle sales carry large ticket values. Gross profit is closer to the pool available to cover compensation, advertising, occupancy, technology, and other operating expenses.
That makes the ratio a useful bridge from gross profit mix to operating income. A business with more high-margin fixed operations or F&I can support a different expense structure than one relying more heavily on vehicle front-end profit.
The denominator can fall faster than costs
A rising SG&A/gross-profit ratio does not necessarily mean SG&A dollars exploded. The ratio can deteriorate when new-vehicle gross profit per retail unit falls faster than management can reduce payroll, rent, advertising, or other semi-fixed costs.
Conversely, a falling ratio can reflect better expense control, stronger gross profit, or both. AutoNation explicitly linked its 2025 improvement to effective cost management as well as prior-year disruption from the CDK outage.
Adjusted versions require another check. If an issuer excludes costs from adjusted SG&A, compare the adjusted numerator only with the corresponding disclosed gross-profit framework rather than mixing bases.
Primary sources: AutoNation 2025 Form 10-K and Penske Automotive Group 2025 Form 10-K.
Part of the Automotive Dealership Economics
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- ANOpen operating-model research →10 of 10 reviewed concepts in Automotive Dealership EconomicsInventory pressure and operating leverage2 of 2 bridge concepts supportedContinue through this bridge:Inventory Days Supply
- PAGOpen operating-model research →8 of 10 reviewed concepts in Automotive Dealership Economics
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Compare dealer operating leverage
Compare overhead against dealership gross profit while separating expense control from changes in the gross-profit denominator.
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