Buyer's Guide · Gas Stations
10 ways sellers inflate a gas station's P&L
Sellers rarely lie outright; they shape the P&L. The most common moves: padding inside sales, inflating add-backs, hinting at unverifiable cash, burying deferred maintenance, and blaming low profit on a renovation that may not have happened. Here are 10 of them, and exactly how to catch each.
A clean-looking P&L is a sales document, not a fact. The number that matters (what you'll actually take home) only holds up if it survives a cross-check against the tax returns, the bank statements, and the supplier records. These are the ten places that cross-check most often breaks.
1.Padding inside sales with personal purchases
The trick: Personal and family purchases get rung up as sales, quietly inflating inside-sales revenue.
How to catch it: Inside-sales gross margin should sit around 25 to 35%. If revenue climbed but the margin looks off, reconcile sales against the supplier's purchase invoices. You can't sell more than you bought.
2.Inflating add-backs to pump up SDE
The trick: Routine or personal costs get reclassified as one-time “add-backs,” inflating the discretionary earnings the price is based on.
How to catch it: Every add-back must be genuinely non-recurring or truly personal, and documented. A large, vague owner add-back with no paper trail is the single most common SDE-inflation move.
3.Hinting at unverifiable cash
The trick: “We do a lot more in cash than the books show.” The wink is meant to make you pay for income that was never reported.
How to catch it: Never pay for unreported income. If it's not on the federal tax return, it doesn't exist for valuation. And unreported cash sales can be a liability you inherit, not a bonus.
4.Burying deferred maintenance
The trick: Repairs get deferred or kept off the books so the P&L looks lean and profitable.
How to catch it: Maintenance typically runs 0.5 to 2% of revenue. Suspiciously low means deferred costs heading straight to you. Ask for the full repair-and-maintenance history.
5.Fuel volume that doesn't match deliveries
The trick: Claimed gallons sold quietly exceed what the fuel supplier actually delivered.
How to catch it: Reconcile claimed volume against the supplier's delivery records. The two must line up: you can't sell fuel you never received.
6.Suspiciously round revenue
The trick: Monthly revenue lands on the same tidy number: exactly $50,000, month after month.
How to catch it: Real businesses are lumpy; weather, holidays, and fuel prices move the numbers. Identical round figures every month point to fabrication, not bookkeeping.
7.Hiding the brand or franchise fees
The trick: The seller plays up the brand's benefits while leaving its fees and obligations off the P&L.
How to catch it: Branded-dealer fees are per-gallon and small (~$1,500 to $5,000/yr). Confirm they're on the P&L or folded into “Miscellaneous.” And ask about required image refreshes ($30,000 to $60,000 every 8 to 12 years).
8.Blaming low profit on a “renovation”
The trick: “Profit's down this year because we just renovated.” It explains away weak numbers with a story.
How to catch it: Verify the CapEx actually happened: invoices, permits, contractor records. A renovation with no paper trail is a narrative, not an expense.
9.Running on free family labor
The trick: Labor looks tiny because the owner's family works unpaid, making the business look more profitable than it is.
How to catch it: Labor (excluding the owner) usually runs 4 to 8% of revenue. If it's far below that, normalize it to real market wages, because you'll have to actually pay staff.
10.Mixing in income that won't transfer
The trick: Lottery, ATM, a side hustle, or a sweetheart supplier deal gets baked into the numbers, but none of it survives the sale.
How to catch it: Separate transferable from non-transferable income. Lottery commission (5 to 7% of lottery sales) and ATM income ($200 to $500/month) should be real and continuing under your ownership.
Let BizScore catch them for you
Upload the seller's P&L, tax returns, and bank statements. BizScore reconciles all three, recomputes SDE, and flags the inflated add-backs and mismatches above, each one backed by the exact document it came from.
Frequently asked
- What's the most common way a P&L gets inflated?
- Padded add-backs and unverifiable cash. Both pump SDE (the earnings the price is based on) without changing the verifiable books, which is exactly why they're so common.
- How do I actually verify a seller's P&L?
- Reconcile it against the federal tax returns and the bank statements. All three should agree within a few percent. The gaps are the story.
- Should I ever pay for “unreported cash income”?
- No. If it's not on the tax return, it doesn't exist for valuation. And unreported cash can be a legal liability you inherit along with the business.
- Can software catch this?
- The math-heavy parts, yes. BizScore reconciles the three documents, recomputes SDE, and flags inflated add-backs and mismatches, each backed by the document it came from.
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About this guide
BizScore is built by first-time business buyers — people who watched someone close to them lose their life savings on a deal that looked clean on a spreadsheet and fell apart in the documents the seller never volunteered. That experience is why these guides exist, and why every BizScore report cites the exact document behind each finding.
Where the numbers come from: the benchmark ranges in our guides — SDE multiples, expense ratios, typical timelines — are widely-used industry rules of thumb, cross-checked against the analytical benchmarks BizScore applies inside its reports. Dollar figures such as a ~$15,000 quality-of-earnings review or a $5,000 deal attorney are representative of what buyers typically pay, not quotes; actual costs and multiples vary by deal. We review these figures periodically — last updated June 2026.
BizScore is an information service — think of it as a Carfax for a small business — not a CPA, an attorney, or financial advice. Use it to decide where to spend your professional dollars, and bring in a qualified professional before you sign anything.
This guide is general education, not a formal business appraisal or financial, legal, or tax advice. Every deal is different. Verify against the actual documents and talk to a qualified professional before you sign anything.