A warm January can erase 10 percent of your winter gallons while your trucks, drivers, insurance, and tank inventory cost exactly the same as they did in December. If you price and budget like a normal retailer — cost plus a percentage markup — that warm January reads as a mystery. If you run your books by the gallon, it reads as arithmetic you saw coming.
Fuel delivery is one of the few businesses where the product, the revenue, the delivery cost, and even the weather forecast all reduce to the same unit. This guide shows how to keep books that match the way your business actually works: margin per gallon, delivery cost per stop, customer prepayments as liabilities, and cash planning around a summer trough that arrives every single year.
Think in Cents per Gallon, Not Percentage Markup
A percentage markup lies to fuel dealers because your wholesale cost swings with crude and natural gas liquids markets while your operating cost per gallon barely moves. A 40 percent markup on $1.50 wholesale and a 40 percent markup on $2.50 wholesale produce wildly different gross profit dollars, yet your driver wages, truck payments, insurance, and office overhead did not change at all.
The industry prices everything per gallon instead. The major retail propane marketers report gross margin per gallon and EBITDA per gallon as their headline metrics, and trade analysis routinely compares customer segments the same way: a residential heating customer might generate 60 cents of gross margin on 800 annual gallons, while an agricultural customer generates 25 cents on 1,200 gallons — before very different delivery costs are subtracted. Neither number means anything as a percentage. Both mean everything as cents per gallon.
Put this into your books with a simple discipline:
- Track wholesale cost per gallon delivered into your bulk plant or trucks, load by load. That is your true cost of goods sold, and it changes constantly.
- Set retail prices as wholesale plus a per-gallon margin target per segment — residential heating, commercial, agricultural, and cylinder or forklift accounts each earn their own margin, because each costs a different amount to serve.
- Review realized margin per gallon monthly, by segment. When wholesale spikes and you hesitate to pass it through, this report shows the leak in dollars, immediately.
A dealer who knows every segment earns its per-gallon target can survive a wholesale spike. A dealer watching only blended percentage margin finds out in April.
Will-Call vs. Automatic: The Delivery-Cost Math That Decides Accounts
Every gallon you sell carries a delivery cost, and that cost is set mostly by how full the truck is and how many stops the driver makes per hour — not by the fuel itself. An industry benchmarking survey of propane retailers found residential heating deliveries averaging about 171 gallons per stop at just over two stops per hour. Do the arithmetic on your own operation: driver wages, truck payment, fuel, maintenance, and insurance, divided by gallons delivered. That quotient — your delivery cost per gallon — is the number that decides which customers are profitable.
This is why automatic delivery (often called keep-full) beats will-call on the books even when the ticket price is identical:
- Automatic customers get route-dense, high-gallon stops. Your software forecasts each tank from degree-days and usage history, so the truck tops off full tanks on an efficient route instead of crisscrossing town for partial fills.
- Will-call customers call at the worst moment. They order when the gauge reads low, often during a cold snap when your routes are already full, and every out-of-route trip burns driver hours for a small drop. Many dealers charge a special-trip fee for emergency will-call deliveries — and you should, because the fee reflects a real incremental cost.
- Runouts are pure loss. A customer who runs dry costs you an emergency trip, a leak check, and sometimes a relight visit, plus the goodwill damage. Automatic scheduling nearly eliminates them.
None of this means refusing will-call business. It means costing it honestly: assign a higher per-gallon margin target or explicit fees to will-call accounts, track gallons per stop separately for each group, and watch the mix. A route book drifting toward will-call is a margin leak wearing a customer-service costume.
Company-Owned Tanks Are Fixed Assets, Not Freebies
Most residential propane customers lease or rent the tank from you, often with the rental fee waived above a minimum annual volume. On your books, every tank sitting in a customer's yard is a fixed asset you own, maintain, and insure — and a switching cost that keeps the account. Track tanks as assets with installation dates and maintenance history, record rental income separately from fuel margin, and make sure your liability coverage reflects equipment scattered across hundreds of properties. When a customer leaves, retrieving the tank has a real cost; your customer-acquisition math should assume you will sometimes pay it.
Prebuy, Caps, and Budget Plans Are Liabilities First
Summer is when fuel dealers collect money for winter. Prebuy programs let customers lock a fixed price by prepaying for gallons in late summer; price-cap programs charge a fee or premium for a guaranteed ceiling with downside protection; budget or level-payment plans spread estimated annual cost across equal monthly payments, often June through March. Customers love the predictability. Your balance sheet must treat every one of these programs as what it is: a liability until the fuel is delivered.
The accounting is straightforward but easy to get wrong under cash pressure:
- Prebuy cash is deferred revenue, not sales. When a customer prepays for 800 gallons, credit a customer-deposits or deferred-revenue liability account. Recognize revenue (and the matching wholesale cost) only as each delivery ticket posts against the balance. Booking prebuy cash as revenue in August flatters your summer P&L and starves your winter one — the exact opposite of reality.
- Cap fees and program premiums are separate revenue. The fee a customer pays for a price cap compensates you for the hedge or supply contract you bought to back it. Record it separately from fuel sales so you can see whether your cap program actually covers its hedging cost.
- Budget-plan credit balances belong to customers. A level-payment customer who overpays relative to deliveries through February holds a credit you owe in fuel or refunds at true-up. Reconcile every budget account at season end, and true up promptly — stale credits become billing disputes and churn.
- Never spend prebuy cash as if it were profit. Prebuy collections arriving in August and September feel like income, but you still owe every gallon, and you will likely owe it at winter wholesale prices. Dealers who fund summer operations out of prebuy cash without a repayment plan discover in February that they sold fuel below replacement cost and already spent the difference.
The mirror image matters too: if you hedge prebuy gallons with fixed-price supply contracts or call options, your hedge position and your customer obligation move together. Review them side by side monthly — unhedged fixed-price gallons in a rising market are the fastest way a solid dealer goes broke.
Degree-Days Run Your Forecast
Heating demand is weather, and weather has a unit: the heating degree-day. One heating degree-day accrues for each degree the day's average temperature falls below 65°F, and your gallons track cumulative degree-days more closely than they track anything else — including your marketing. The U.S. Energy Information Administration builds its entire winter fuels outlook around heating degree-day projections, and notes that roughly two-thirds of annual propane consumption lands in the winter months of October through March. About 5 percent of American households heat primarily with propane, concentrated in the Northeast and Midwest, where a cold snap moves enormous volume in days.
Build your planning around the same unit:
- Normalize sales to degree-days. Gallons divided by heating degree-days for the period tells you whether a soft month was weather or performance. A dealer who beat last year's gallons in a winter 10 percent warmer than forecast had a great year; a dealer who matched last year's gallons in a winter 10 percent colder lost share.
- Forecast deliveries from degree-day history, not last year's calendar. Your keep-full system already does this per tank; apply the same logic to staffing, truck readiness, and working-capital needs for the season.
- Budget a warm-winter scenario every year. Model what happens if degree-days come in 10 percent below normal: which costs are truly fixed, where the line of credit lands, and which capital purchases wait. EIA publishes warmer- and colder-than-forecast scenarios for exactly this reason. A warm winter should squeeze your year, never threaten your survival.
Surviving the Summer Cash Trough
Fuel delivery collects most of its revenue in roughly half the year and pays most of its fixed costs all year. Summer is when the mismatch bites: gallons collapse, budget-plan payments taper off, and payroll, truck payments, insurance, tank maintenance, and prebuy-season marketing all continue. Industry cash-flow guidance puts it bluntly — know your burn rate in the slow months, because summer is when propane revenues are lowest and the outflow pace decides how much you need coming in.
Three disciplines carry dealers through:
- Size an operating line of credit to price times receivables, not to last year's peak. When wholesale prices double, the dollars tied up in delivered-but-unpaid winter gallons roughly double too — dealers have carried three times the debt at $3 oil that they carried at $1 oil. Negotiate the line before heating season, when your financials look strongest, and draw it for working capital rather than stretching payables to your own suppliers.
- Let budget plans smooth your inflows, then protect the smoothing. Ten or twelve equal payments turn a five-month revenue season into a year-round cash stream — but only if enrollment is high and true-ups are disciplined. Market budget plans aggressively every spring; they are a financing tool disguised as a customer convenience.
- Schedule major spending for the cash-rich months. Truck replacements, bulk-plant work, and software upgrades belong in late winter and spring, funded by heating-season collections — not in September, funded by prebuy deposits you owe back as fuel.
Watch the calendar asymmetry too: extended corporate and partnership returns, quarterly estimated taxes, and insurance renewals all have fixed dates that ignore your seasonality. A 13-week cash forecast that starts from degree-day-normalized revenue, not trailing average revenue, is the single most useful financial habit a fuel dealer can build.
The Mistakes That Sink Fuel Dealers
Most dealer failures are bookkeeping failures wearing operational disguises. Check yourself against the short list:
- Pricing on percentage markup instead of per-gallon margin targets by segment, so wholesale spikes silently erase profit.
- Booking prebuy cash as revenue instead of deferred revenue, then spending winter's fuel money in September.
- Treating all gallons as equal instead of costing delivery per stop — a 60-gallon will-call drop and a 400-gallon automatic fill are different businesses sharing one truck.
- Skipping the warm-winter budget and discovering in March that fixed costs ate a season with no reserve behind them.
- Forgetting fuel-tax boundaries. Heating fuels generally sit outside motor-fuel excise regimes, but the moment you sell propane as motor fuel (autogas), dyed versus clear diesel distinctions, off-road use, and state excise rules apply. Keep heating and motor-fuel gallons in separate accounts from the first ticket — reconstructing the split at filing time is how penalties happen.
- Ignoring shrink and ticket discipline. Fuel that leaves the bulk plant but never appears on a delivery ticket is either a meter problem or a theft problem, and both compound silently. Reconcile bulk-plant withdrawals to billed delivery tickets every month; investigate variances above a small tolerance immediately.
Keep Your Fuel Business Financials Organized Year-Round
Whether you are reconciling prebuy liabilities in September or sizing a credit line for January, clear financial records turn seasonal chaos into a manageable cycle. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.
