The pumps moved the most fuel in the county. The margin was inside the store.

The subject was a fuel-dominant station with a small attached convenience store on a high-traffic commuter corridor, being acquired by an operator who planned to keep running it as a fuel-first site. The plan leaned on volume: the station pumped well over a hundred and fifty thousand gallons a month, among the highest in its county, and the sponsor treated that throughput as the engine of the deal. The all-in acquisition ran to roughly $2.4 million across the real estate, the fuel infrastructure, and modest working capital.

The deal was structured for SBA 7(a) financing — the flexible vehicle for a fuel-and-retail acquisition with a goodwill component and working-capital needs. Because the projections carried the credit, an independent feasibility study was expected to give the lender a defensible basis for the forecast, and a separate, lender-required environmental investigation would run in parallel on the underground storage tanks.

The sponsor's pro forma read gallons times margin: high volume, a healthy-looking per-gallon spread, a strong top line. The analytical question was whether the per-gallon number described what the station kept after the costs that fall on every gallon.

The intuitive way to underwrite a gas station is fuel volume. Establish the gallons, multiply by a per-gallon margin, and read off a revenue line — high volume reads as a strong, durable fuel franchise, and a hundred and fifty thousand gallons a month makes the site look like one of the best in its market. On that logic the coverage cleared and the fuel throughput was the asset's earning power.

It was also pricing the fuel at its gross spread rather than its net, and treating the highest-revenue line in the business as if it were the highest-profit line — which, in fuel retail, it rarely is.

Fuel is a high-revenue, razor-thin-margin product, and the profit in a modern fuel-and-retail site lives inside the store. The gross spread on a gallon is consumed by costs that fall on every gallon: credit-card interchange alone ran roughly eight cents a gallon in 2024, and after card fees, store operating expense, and amortization, the industry's net is on the order of fifteen cents a gallon (NACS State of the Industry). At that net, a hundred and fifty thousand gallons a month is only around twenty-two thousand dollars of monthly fuel contribution — a fraction of what the gross-spread reading implied, and not enough on its own to carry the acquisition.

There is a second, counterintuitive twist the gross reading misses: because the card fee is a percentage of the pump price, a fuel-price spike raises the cents-per-gallon fee and compresses net fuel margin. Underwriting on headline fuel revenue therefore rewards exactly the price environment that thins the operator's actual profit. The structural fact behind this is the inversion the whole industry now runs on: in 2025, fuel was about sixty-five percent of convenience-store sales dollars but under forty percent of gross-profit dollars, while foodservice produced nearly thirty-nine percent of in-store gross profit on under thirty percent of in-store sales (NACS). Fuel drives the traffic; the store — and especially foodservice — makes the money.

The relevant analysis, then, was not the gallon count. It was the net fuel contribution after the costs every gallon carries, the inside-sales and foodservice mix the site could actually generate, and the blended contribution of the two. Re-underwritten that way, the high-volume fuel franchise was thinner than it looked, and the deal's coverage depended on the inside store the sponsor had treated as an afterthought.

Net-of-everything fuel contribution. Fuel was modeled at its net margin after credit-card fees, store operating cost, and amortization — not its gross spread — so the contribution per gallon reflected what the operator actually kept.

Price-sensitivity of the card fee. The model tested fuel net margin across a range of pump prices, surfacing the compression a price spike creates through the percentage-based interchange fee, rather than assuming a fixed cents-per-gallon margin.

Inside-sales and foodservice build. Merchandise and foodservice were modeled at their own margins and contribution — foodservice carrying the disproportionate share of in-store gross profit — and sized against the store's footprint and the corridor's traffic composition, so the inside contribution was measured rather than assumed.

Blended-contribution coverage. Coverage was built on the blended contribution of fuel and inside sales, isolating how much of the debt service the store carried versus the pumps, and stress-testing the mix the location could realistically achieve.

Traffic composition. The commuter-heavy traffic stream was assessed for inside-sales conversion — commuter fuel-only stops convert to inside sales at different rates than destination or local traffic — so the inside forecast reflected the customers the site actually drew.

Environmental as a parallel, lender-required item. The analysis noted the separate, lender-required environmental investigation on the tanks as a gating condition and a sized risk in the capital plan — work the feasibility accounted for, not work the firm performed — without folding an unquantified liability into the operating projection.

The credit file replaced a gallons-times-gross-spread line with a net fuel contribution and a measured inside-sales build, and explained why the county's highest-volume pumps did not translate into the county's strongest cash flow. The analysis showed net fuel contribution carrying only part of the debt service and the inside store carrying the rest, with the blended mix clearing coverage. The SBA reviewer treated the margin inversion and the inside-sales mix — not the gallon count — as the basis for the projections, and the going-concern appraisal's allocation across real estate, equipment, and goodwill clarified how much of the value was collateralized. The independent study answered the program's expectation by underwriting the station on the margin it kept, which is where fuel-retail credits are most often misjudged.

The 7(a) financing closed underwritten on blended fuel-and-inside contribution rather than fuel volume, with the inside store's foodservice and merchandise margin recognized as the engine of coverage and the fuel throughput correctly valued as traffic that drives it. The inflection was not that the station was weak. It was that the number the pro forma multiplied — gross spread times gallons — described the station's revenue, not the margin it kept, and the bankable profit was inside the store.

• 01Fuel is a razor-thin-margin product. After credit-card fees, operating cost, and amortization, net fuel margin runs on the order of fifteen cents a gallon, so a large gallon count multiplied by a gross spread overstates what the operator keeps.
• 02A fuel-price spike compresses fuel margin. Because the card fee is a percentage of the pump price, headline fuel revenue can rise while net fuel profit falls — so underwriting on fuel revenue rewards the wrong condition.
• 03The profit is inside the store. Fuel is roughly two-thirds of sales but under forty percent of gross profit, while foodservice carries a disproportionate share of in-store gross profit; fuel drives the traffic, the store makes the money.
• 04Underwrite the blended contribution. Coverage depends on net fuel contribution plus the inside-sales and foodservice mix the site can actually generate, not on the gallon count alone.