How Much Does It Cost to Fill a 275-Gallon Oil Tank?
From the Alcus family · Alcus Fuel Oil & Sons, Amityville · Updated October 31, 2026
The cost to fill a 275-gallon oil tank depends on how many gallons it actually takes and today's price for that delivery size. Here's how to work it out, with today's numbers for Amityville (11701) when our daily price is posted.
How many gallons a 275 takes
- Full, a 275 holds about 225–250 usable gallons (tanks are never filled to the brim).
- At 1/4 on the gauge there are about 55–65 gallons left, so a fill usually takes 165–190 gallons.
- More detail: oil tank sizes and how to read your tank gauge.
Today's cost for common fills (Amityville 11701)
| Gallons delivered | When | Cash (COD) | Card |
|---|---|---|---|
| 100 gal | Tank a bit under 1/2 | $520.90 | $540.90 |
| 150 gal | Tank a bit over 1/4 | $773.85 | $803.85 |
| 175 gal | Tank at about 1/4 | $902.83 | $937.83 |
| 190 gal | Tank just under 1/4 | $980.21 | $1,018.21 |
| 225 gal | Tank close to empty (≈ full fill) | $1,149.53 | $1,194.53 |
Before sales tax. Uses today's price for each delivery size (October 30, 2026). Other ZIPs can differ slightly; see today's prices for every size.
Working it out yourself
- Read the gauge and pick the gallons from the list above (or choose "fill my tank").
- Find the price per gallon for that size on our price page. Paying the driver cash saves 20¢ a gallon.
- Multiply, then add sales tax for your county: Suffolk 2.5%, Nassau 0%.
Ways to keep the bill manageable
- Order at 1/4 instead of waiting: a 150+ gallon delivery is in a lower per-gallon tier than a small one.
- Pay cash to the driver, or pay by card online or by phone. Drivers don't take cards, and we don't accept checks.
- Tight month? Our minimum is 25 gallons: small deliveries. HEAP can help too: HEAP 2026–27.
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Questions
How much does it cost to fill a 275-gallon oil tank?
A 275 never takes 275 gallons: a fill at 1/4 is usually about 165–190 gallons, and a fill from near-empty about 225–250. Multiply those gallons by today's price for that delivery size. This page shows today's cost for common fills when our daily price is posted; otherwise call 631-264-8800.
Is the price per gallon the same for every fill?
No. Bigger deliveries cost less per gallon (price tiers by delivery size), and paying the driver cash saves 20¢ a gallon off the card price.
Is sales tax included?
No. Amounts here are before tax. Suffolk County adds 2.5% on home heating oil; Nassau County adds 0%. See heating oil sales tax.
If I ask for a fill, what do I pay?
You pay only for the gallons actually delivered, at the price for that delivery size.