8 Mistakes I Made Buying My First Few Gas Stations (And How to Avoid Every One of Them)

November 2004. I had $370,000 saved — almost everything I had from selling my houses in the Boston area. I put nearly half of it into my first gas station.

I thought I knew what I was buying. Good location. Decent sales. Fair price. The seller seemed honest.

I was wrong about most of it.

Twenty-one years and 20+ stations later, I can tell you this clearly: the gas station the seller shows you and the gas station you actually buy are often two different things. The difference hides in the books, underground in the tanks, inside the fuel contract, and in a few places most first-time buyers never think to look.

This post is for you if you have $50,000, $100,000, $250,000 or more saved and you're looking at gas stations right now. By the end, you'll know exactly what to verify before you buy, what to ask the seller, and where first-time buyers most commonly get trapped.

I'm not a broker. I'm not summarizing articles. I'm an owner-operator who made these mistakes, paid for them, and spent two decades learning to catch them before they close.

Here's the mindset shift to carry through this entire post: a buyer asks "how much does it make?" An owner-operator asks "can I prove it?" Every mistake below lives in that gap.

Mistake 1: I Trusted the Seller's Numbers Too Quickly

This mistake cost me the most — not in one moment, but slowly, after closing, when reality didn't match what I'd been shown.

The seller had a P&L. It looked clean. Inside sales, fuel gallons, net profit — the numbers made sense on paper. I was excited. I wanted to believe it. And that desire to believe is exactly what gets first-time buyers in trouble.

Here's what I didn't check:

• I didn't compare the P&L to three years of tax returns
• I didn't pull sales tax filings
• I didn't look at POS transaction reports
• I didn't cross-check cigarette sales against cigarette invoices
• I didn't compare fuel gallons against jobber delivery statements
• I didn't match lottery commissions to reported sales
• I didn't look at bank deposits

I looked at one document and thought I understood the business. I didn't.

A gas station has too many moving parts: fuel, inside sales, lottery, ATM, cigarettes, beer, food, car wash, credit card fees, payroll, vendor rebates, shrink, rent, utilities, repairs. If one number is off — even slightly — the whole deal can look better than it actually is.

And I'll be direct with you: some sellers manipulate data. Not all of them. But enough that you cannot afford to assume good faith. Some underreport income for taxes, then show inflated cash sales to buyers. Some clean the store for 30 days before showings. Some have POS numbers that don't match their tax books.

Here's the problem nobody tells you: if you buy a business running on manipulated numbers and then run it clean — real payroll, real tax filings, real inventory accounting — the profit can drop significantly. The seller's old habits become your problem the moment you sign.

What I do now: I compare tax returns, sales tax filings, POS reports, bank deposits, fuel invoices, vendor invoices, inventory movement, credit card settlement reports, payroll records, and lottery commission reports — and I look for patterns across at least 12 months. Three years is better.

One good month is easy to fake. A consistent pattern across three years is much harder to manufacture — if you know where to look.

The cheapest time to find a problem is before closing. After closing, it's your problem.

Mistake 2: I Did Not Respect Environmental Risk

When you buy a gas station, you're not just buying a building. You're buying underground history.

Underground storage tanks. Fuel lines. Decades of deliveries, spills, and soil exposure. If those tanks have been leaking — even slowly, even for years before you arrived — you may be buying the cleanup.

The EPA reports average UST cleanup costs of $130,000 to over $300,000 per site. Serious groundwater contamination cases can go well past $1 million. And in Texas, if you own the property, you can own the liability.

When I was new, I treated the Phase 1 Environmental Site Assessment like paperwork — something the lender required, something to get through. Today I treat it like the most important document in the deal. If the Phase 1 comes back with recognized environmental concerns and the lender requires a Phase 2 — soil testing, groundwater testing, drilling, lab reports — your deal can slow down or die entirely.

The mistake I see constantly: buyers look at an old station and think, it's been open 30 years, it must be fine. That's backwards. An older station is the one you check more carefully — older tanks, older lines, missing records, past incidents never fully resolved.

Before you buy, ask the seller for:

• Tank registration
• Leak detection records
• Spill bucket test records
• Line pressure test records
• Cathodic protection records
• Environmental insurance information
• Any prior environmental reports
• Any notices from TCEQ or your state environmental agency

If the seller can't produce those documents, that is an answer.

And if the environmental report isn't clean, get experts — not reassurance from the broker. Sometimes the best deal is the one you walk away from.

Mistake 3: I Didn't Read the Fuel Supply Contract Like It Mattered

Most first-time buyers look at the brand on the canopy — Shell, Chevron, Exxon, Valero — and feel a sense of comfort. Big brand, must be solid.

The brand is not the contract. The contract is the contract. And the contract controls your margins for the next decade.

Fuel supply agreements run 10, 15, sometimes 20 years. When you buy a station today, you may be inheriting pricing terms, volume commitments, and restrictions the previous owner negotiated years ago — under different market conditions, at different rack prices, with different rebate structures.

If your competitor across the street gets better rack pricing and you're locked into a bad supply agreement, you can be busy every day and still lose. Fuel is already the lowest-margin product in your store. A bad supply contract makes it worse.

Before closing, you need answers to these questions:

• How is the price calculated — rack plus freight plus tax plus dealer markup?
• Are there rebates, and who receives them?
• Are there minimum gallon requirements — and what happens if you miss them?
• Are there image upgrade requirements you're now responsible for?
• Can the contract be assigned to a future buyer when you sell?
• Can it be terminated, and at what cost?

The fuel contract doesn't just affect today's margins — it affects your exit. If the contract can't be assigned, your pool of future buyers shrinks significantly. That changes the value of the business today.

Read it. Have an attorney read it. Understand every term before you sign anything.

Mistake 4: I Didn't Understand Who Actually Controlled the Station

This is the mistake that confuses first-time buyers most, because it sounds simple until you're in the middle of it.

In some gas station deals there are three separate masters — and you're not dealing with one. You're dealing with all of them:

1. The real estate owner — controls the land and building
2. The fuel brand or jobber — controls the fuel supply and may own the pumps, canopy, and signage
3. The business seller — controls the operating entity: inventory, employees, goodwill, POS

When a buyer says "I'm buying a gas station," the first question should be: what exactly are you buying? The real estate? The business only? A leasehold interest? The equipment? The fuel contract rights? All of them? Some of them?

If you're buying business-only and the lease has three years left with no renewal option, you may not have bought a business. You've bought a short-term job with an expiration date built in. The landlord can refuse to renew. The landlord can raise rent dramatically. The landlord can sell the property. And if the lease isn't assignable, you can't easily sell the business when you're ready to exit.

Before buying, I need to know:

• What is the lease term, and what are the renewal options?
• What are the rent escalations?
• Who is responsible for the tanks, pumps, and canopy?
• Is the lease assignable?
• Is a personal guarantee required?
• What happens to the fuel contract if ownership changes?

The lease is the oxygen of the business. Everything else depends on it.

Mistake 5: I Underestimated Credit Card Fees

This one surprises almost every first-time buyer I talk to — because it's invisible until you're operating.

A customer pulls in and fills up. $40 of fuel on a rewards credit card. The interchange fee runs somewhere around 2% or more — that's 80 cents to a dollar in fees on a single fill-up. If your net fuel margin on that transaction is 50 cents to $1 after all costs, the credit card fee just took most — or all — of your profit.

The customer filled up, bought nothing inside, paid with plastic, and left. You had traffic. You had volume. You made close to nothing.

NACS reported that credit card swipe fees are now the second-largest expense for convenience store operators, behind only labor. In 2024, U.S. retailers paid over $187 billion in card fees. The average c-store swipe fee runs around 2.35% of the transaction. On a high-fuel-volume station, that adds up to tens of thousands of dollars a month.

This is why fuel volume alone is a misleading metric. The question isn't how many gallons you sell. The question is what's left after card fees, supply costs, and operating expenses.

What I look at now before buying:

• What is the cash-to-credit ratio?
• What processor is being used, and at what rate?
• Is the site EMV compliant?
• Are there chargebacks?
• Are PCI compliance fees being paid separately?
• Most importantly: what percentage of fuel customers also buy inside?

The inside transaction is where the real economics live. A station doing 200,000 gallons a month with nobody coming inside is a very different business than one doing 120,000 gallons with strong inside attachment. The second one is usually more profitable.

Mistake 6: I Didn't Verify Inventory Properly

Inventory sounds boring. It's also where I've seen buyers lose $20,000 to $30,000 on the day they close.

The seller says there's $80,000 of inventory. You close. You take possession. Then you start actually counting and realize maybe $55,000 of it is real, sellable, current inventory. The rest is expired product, slow-moving items that haven't sold in months, damaged goods counted at retail when they should be counted at cost, and vendor credits included in the number that don't exist as product on the shelf.

Watch this one too: inventory is often counted at retail, but you pay the seller at purchase price — and the margin assumptions in that conversion can swing the number by thousands of dollars.

That $25,000 gap is a day-one loss. Before you've served a single customer.

But inventory does something else just as important — it's a cross-check on every other number in the deal:

• If the seller claims strong cigarette sales, cigarette invoices should support it
• If beer sales are supposedly high, distributor delivery records should confirm it
• If inside sales are strong, inventory movement should reflect the volume

When the POS says one thing and the inventory and invoices say something different, there's a reason. Your job before closing is to find that reason.

I always compare POS data, vendor invoices, inventory movement, gross margin by category, tax records, and bank deposits together. No single number tells the truth. Numbers have to agree with each other. When they don't — stop.

Mistake 7: I Underestimated What Real Staffing Costs

A P&L shows payroll as a line item. What it doesn't show you is whether that payroll is real.

Many sellers — especially owner-operators — work 50 or 70 hours a week behind the counter and don't pay themselves a real salary. The business shows strong profit. But that profit is built on unpaid owner labor.

The moment you buy that station and hire someone to do what the seller was doing — a manager, an extra cashier, a shift lead — the economics change dramatically. Maybe the station showed $180,000 net. After replacing the seller's labor with real payroll, it's $100,000. That's a completely different valuation.

Before buying, I ask:

• Who opens the store every day? Who closes it?
• Who orders inventory? Who manages vendors? Who handles cash?
• How many hours does the owner actually work each week?
• What would it cost to replace that person at market rate?

Beyond owner labor, staffing is operational risk. NACS reports c-store employee turnover exceeds 100% annually — some stations lose their entire staff within 12 months. If you inherit a poorly trained team with high turnover, the cost of recruiting, onboarding, and managing that cycle comes out of your pocket immediately after closing.

Mistake 8: I Didn't Study What Was Coming to the Market

A gas station is a location business. But location isn't just what exists today — it's what's coming tomorrow.

I bought a station once because the traffic counts were strong, the corner was good, and the neighborhood was growing. What I didn't look carefully enough at was what else was growing — including a competitor already permitted and in development two miles away.

That competitor opened 14 months after I bought. Traffic shifted. Volume dropped. It took two years to stabilize.

The seller knew. I didn't ask.

Here's what operators check that buyers miss:

• City council meeting agendas
• Planning and zoning applications
• Building permits filed nearby
• DOT road project schedules
• Traffic count trend lines over multiple years
• New subdivision filings in the county
• Competitor expansion announcements
• Land sales on surrounding parcels

A Buc-ee's opening a mile away changes your market. A QuikTrip, RaceTrac, or major grocery fuel center entering your trade area changes your market. A median cut removing direct access to your site changes your market permanently.

Sometimes sellers know exactly what's coming. That's precisely why they're selling.

A buyer asks: how does this station perform today? An owner-operator asks: what can hurt this station in the next three to five years? That question has to be answered before you write the check — not after.

What Changed Between My First Station and Today

When I bought my first station, I was focused on the dream. I wanted to own something real, stop depending on a paycheck, build something that was mine. That ambition was right. But ambition without due diligence is just expensive hope. Taking a risk without calculations is dangerous.

Today when someone brings me a deal, I don't get excited first. I get curious. First I ask for the numbers and the asking price. If it sounds attractive, I ask for the tax returns, the POS reports, the fuel gallons matched against the jobber statements. Then the lease, the fuel contract, the environmental reports, the payroll. Then I check what's being built nearby.

Only after that do we negotiate price. Because price means nothing if the business isn't real. A cheap bad deal is still expensive — you just pay in time instead of money.

The right gas station can change your financial life. The wrong one can trap you for years.

Verify everything. Buy the truth — not the story.

DISCLAIMER: Everything here reflects my personal experience as a gas station operator. Not investment, legal, or financial advice. Your outcome depends on your capital, the deal you buy, and your execution. Consult qualified professionals before purchasing any business.