Who We Help · Gas Stations · Bookkeeping
Gas station bookkeeping: pumps, tanks, and the till reconciled daily
A gas station is three businesses sharing one till: fuel earning a few cents per litre, a c-store with real margins and mixed HST, and a lottery counter where most of the cash is not yours. Station books only work when all three reconcile every day — pumps to POS, POS to bank, tanks to litres. That daily discipline is what we build for station operators across Ontario.
By the AnalytIQ Accounting team · Last reviewed: August 12, 2026
The day sheet has to tie three ways
Each operating day becomes one structured entry built from the shift close, and it must agree in three directions before the day is done. Pump totalizers tie to POS fuel sales by grade. The POS tender summary ties to the bank — cash deposited intact, card batches landing net of processor fees. And litres sold tie to tank inventory through dip readings or the automatic tank gauge. When one leg disagrees, you find out that week, while the shift report and camera footage still exist.
We run this on QuickBooks Online with supplier paperwork flowing through Dext, so fuel delivery invoices, c-store vendors, and canopy utilities arrive coded rather than piling up behind the counter.
Fuel margin is a cents-per-litre number, by grade
Fuel is enormous volume on a sliver of margin, so percentages flatter it and monthly dollar totals bury it — the figure that runs the business is margin in cents per litre, tracked by grade and by day. Federal excise and Ontario gasoline tax already sit inside your delivered cost, and HST rides on every litre sold, so real margin is thinner than the pump sign implies. We post fuel revenue and delivered cost so cents per litre falls straight out of the ledger instead of out of a spreadsheet someone rebuilds quarterly.
The supply contract changes the posting model entirely. Under a buy-sell agreement the fuel is your inventory and every litre sold is your revenue. Under a commission or consignment arrangement the brand owns the fuel until it leaves the nozzle, and only the per-litre fee is yours — yet litres still have to reconcile, because tank shortfalls get charged back to you either way.
Shrink shows up in litres before it shows up in dollars
Fuel shrink is found by comparing three litre counts: what the terminal billed as delivered, what the pumps recorded as sold, and what the tanks say remains. A persistent gap has a specific cause — short deliveries, meter drift that a calibration visit will cure, water getting into a tank, or plain drive-offs — and each cause has a different fix. Posting one monthly inventory adjustment without splitting those causes just gives the loss a tidier name.
Inside the store, shrink is a counting discipline. Tobacco is high-value and pocket-sized, so it gets cycle-counted far more often than the chip aisle, and category-level margins are what make theft, short-ships, and pricing errors visible early.
The c-store and the lottery are separate ledgers
Store revenue is not one line. Each stream posts differently, and because the POS tax flags feed the GST34 return directly, they have to be right at the item level.
| Revenue stream | What posts as yours | What we watch |
|---|---|---|
| Fuel — buy-sell sites | Every litre at pump price, with delivered cost relieved from inventory | Cents per litre by grade, daily |
| Fuel — commission sites | Only the per-litre fee from the brand — the fuel never touches your balance sheet | Litre reconciliation still runs; shortfalls come out of your fee |
| Taxable store goods — snacks, drinks, tobacco | Full retail with HST collected | Category margins and frequent tobacco counts |
| Basic groceries — milk, bread | Full retail, zero-rated | Item tax flags in the POS — they drive the HST return |
| Lottery and scratch tickets | Commission only — ticket money is held for OLG until the weekly sweep | Trust cash kept whole; prizes paid out documented |
| Car wash, ATM, propane | Each on its own account | Ancillary margin kept out of the fuel number |
The lottery line is the one that most often distorts station books. Ticket sales are OLG's money from the moment they ring through, sitting in your account only until the weekly settlement sweep; your income is the retailer commission. Book gross ticket sales as revenue and both your top line and your HST position are wrong — and the sweep looks like a mystery withdrawal instead of a settlement.
Cards, cash, and the cross-border layer
Card fees on fuel volume are one of the largest controllable costs on the site, so we keep processor charges on their own line and watch them as a share of card sales rather than letting them hide inside net deposits. Cash gets the boring treatment that protects you: deposits made whole, till variances logged daily so a pattern stands out from noise, and paid-outs backed by receipts.
Many operators run more than one site, each in its own corporation, which means intercompany balances and management fees need clean monthly tie-outs — and some pay US fuel or equipment suppliers in USD. Those threads, including US-citizen owner-operators filing on both sides, are covered in our cross-border tax guide for gas stations. What a full monthly close includes is on our bookkeeping services page.
Common questions.
Why do my bank deposits never match my fuel sales?
Because the deposit is a net of card batches after processor fees, cash that skipped a day, and the OLG lottery sweep. Daily reconciliation posts gross sales and explains every difference, so the bank feed becomes a check instead of the source.
Do I record lottery ticket sales as revenue?
No. Ticket money belongs to OLG and waits in your bank account for the weekly sweep — only your retailer commission is income. Booking gross ticket sales overstates revenue and muddies your HST return.
How do you find fuel shrink?
By reconciling litres three ways — delivered per terminal invoices, sold per pump totalizers, remaining per tank readings. Persistent gaps then get attributed: short deliveries, meter drift, water, or drive-offs each show a different signature.
Related reading
Books that balance to the pump.
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