Heating oil prices in Suffolk County shift constantly. Here's what's actually driving the cost — and how to time your order so you're not paying more than you need to.
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For the nearly 243,000 Suffolk County households that heat with oil, the price per gallon isn’t just a number — it’s a real line item in the family budget. And unlike your electric bill, it doesn’t arrive in predictable monthly increments. It shows up all at once, when the tank needs filling, and the price that day depends on factors most companies never bother to explain.
That lack of transparency is exactly what frustrates most Long Island homeowners. This page is here to change that. We’ll walk you through what actually drives heating oil costs, when prices tend to be lowest, and what to look for so you’re never left wondering whether you got a fair deal.
As of early 2025, the average residential heating oil price in New York State hovered around $4.04 per gallon, according to NYSERDA’s weekly Long Island price data. In Suffolk County specifically, what homeowners pay can range anywhere from $3.00 to $4.50 per gallon depending on the time of year, the type of supplier, and whether there are fees buried in the fine print.
The price you see — or don’t see — before you order is often the first sign of whether a supplier is worth your business. If you have to call during business hours just to get a quote, that’s a signal worth paying attention to.
Heating oil is a refined petroleum product, which means its price is tied directly to crude oil markets. According to EIA data, crude oil accounts for roughly 48% of what you pay per gallon. Refinery processing costs make up about 15%. The remaining 37% comes down to distribution and marketing — which is the slice that actually varies between suppliers, and the one you have the most influence over as a buyer.
Global events move the crude oil portion in ways no local company can control. OPEC production decisions, geopolitical conflicts, and broad economic shifts all feed into the base price. When Russia invaded Ukraine in 2022, heating oil in parts of the Northeast briefly exceeded $6.00 per gallon. By contrast, heating oil futures fell below $2.00 per gallon in May 2025, driven by slower global economic growth. That’s a massive swing — and it illustrates why locking into a fixed-price contract isn’t always the protection it seems to be.
What you can control is the distribution side. That 37% is where supplier choice, ordering timing, and contract structure actually make a difference. A COD supplier buying directly from a terminal — without a broker in the middle — can pass meaningful savings to you on every gallon. The difference between a COD price and a full-service contract price in Suffolk County typically runs $0.50 to $0.90 per gallon. On a typical winter’s usage of 1,000 gallons, that’s $500 to $900 in savings, year after year.
One more thing worth knowing: Suffolk County is part of the downstate New York region that legally requires B5 biodiesel — a blend containing 5% biodiesel — for all residential heating oil deliveries. This is a New York State mandate, not a marketing choice. B5 burns cleaner, produces fewer emissions, and is what most modern oil burners are calibrated for. We deliver B5-compliant fuel on every order, and we’re always happy to confirm that before you commit.
The single most effective thing a Suffolk County homeowner can do to lower their annual heating oil cost is order during the off-season. May through August consistently offers the lowest per-gallon prices of the year. Demand drops sharply once the heating season ends, refineries have ample supply, and suppliers are competing harder for fewer orders.
The difference between a summer fill and a January fill can easily exceed $0.50 per gallon. On a 275-gallon tank fill, that’s over $137 in savings from timing alone — not from switching suppliers or negotiating anything. Just ordering at the right time of year.
The flip side is equally important: waiting until you’re nearly empty in the middle of winter is one of the most expensive things you can do. When a nor’easter hits or temperatures drop suddenly across Long Island, demand spikes faster than local supply chains can respond. Prices can jump $0.20 to $0.50 per gallon within days. Homeowners who run completely out of oil also face emergency delivery fees on top of an already elevated per-gallon price. The practical rule of thumb is to reorder when your gauge hits the quarter-tank mark — that keeps you in standard delivery territory and gives you flexibility on timing.
NYSERDA publishes weekly Long Island heating oil prices as a free public resource. Bookmarking that page gives you an independent benchmark to check before you order, so you’re not relying solely on what any one supplier tells you. If a supplier’s price is significantly above the NYSERDA regional average, that gap is worth questioning.
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Long Island has one of the most competitive residential heating oil markets in the country. With 337,306 homes on Long Island heating with oil — about 34% of all households — and over 117 million gallons delivered in Suffolk County alone during a single winter season, the market is large enough to support dozens of suppliers and comparison platforms dedicated entirely to this region.
That competition is good for you as a buyer, but only if you know how to use it. Price comparison sites like codfuel.com and cheapestoil.com track live prices by zip code across Suffolk County. They’re useful starting points, though some operate on referral commissions that can influence which suppliers they feature most prominently.
The per-gallon price is the headline number, but it’s not always the whole story. Some suppliers add environmental surcharges, delivery fees, or fuel adjustment line items that inflate the final bill well above what the advertised price suggested. Others charge a credit card surcharge — typically $0.10 to $0.20 per gallon more — for the convenience of not paying cash. On a 150-gallon delivery, that’s an extra $15 to $30 just for using your card.
These add-ons aren’t always disclosed upfront, which is why the total cost of a delivery matters more than the per-gallon sticker price. Before you order from any supplier, it’s worth asking directly: what is the final price per gallon, are there any fees added at delivery, and is the price the same for cash and credit card?
Minimum delivery requirements are another thing to check. Some companies require a 100- or 150-gallon minimum, which can force you to take on more oil than you want at a given price point. If you’re trying to time the market or manage a tighter budget, that kind of constraint works against you.
We charge the same price regardless of how you pay — cash or credit card, same per-gallon rate. There are no hidden delivery fees and no minimum order surprises. The price you see on our website before you place your order is the price you pay.
Full-service contracts — where a company automatically delivers oil on a schedule and bills you monthly — appeal to homeowners who don’t want to think about their tank level. That convenience is real. But it comes at a cost that most contract customers don’t fully account for until they start comparing receipts with a neighbor on COD.
Automatic delivery schedules are built around degree-day calculations, not market timing. That means your supplier may be filling your tank in January — when prices are at their seasonal peak — because the algorithm says it’s time, not because it’s a good moment to buy. You don’t get a say in the timing, and you often don’t see the price until after the delivery is made.
COD ordering flips that dynamic. You decide when to order, you see the price before you commit, and you pay for exactly what you receive. The trade-off is that you need to keep an eye on your gauge, but with 24/7 online ordering available — no phone call required, no account needed, no business hours to work around — that’s a much smaller burden than it used to be. You can place an order from your phone at midnight on a Sunday in the middle of February, and it goes through just like any other order.
For a household burning 1,000 gallons a winter across Suffolk County, the savings from COD ordering add up fast. And unlike a contract, there’s nothing to cancel if you want to switch. You order when you need oil, you pay when it arrives, and the relationship is that simple.
Heating oil costs on Long Island are shaped by forces no one fully controls — crude markets, weather, global supply chains. But a meaningful portion of what you pay is determined by choices you do control: who you buy from, when you order, and whether you’re paying hidden fees that quietly inflate every bill.
The short version: buy in the off-season when you can, watch the NYSERDA Long Island weekly price as your benchmark, choose a supplier who shows you the price before you commit, and make sure the fuel being delivered is B5-compliant per New York State requirements.
We’ve been delivering heating oil to Suffolk County homes for over 50 years — from Montauk and Amagansett out east to Amityville and Bay Shore in the west. If you want to see today’s price, place an order, or just have a question answered, we’re available 24 hours a day, every day of the year.
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