Heating oil prices in Washington State commonly run about $4.25-$6.00 per gallon delivered, with a planning average near $5.10. A typical 150- to 200-gallon order may cost $765-$1,200 before any tank service, and the final price depends on location, order size, seasonal demand, and delivery terms.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Delivered heating oil | $4.25/gal | $5.10/gal | $6.00/gal | Residential bulk delivery estimate |
| 150-gallon delivery | $638 | $765 | $900 | Oil only; fees may be extra |
| 200-gallon delivery | $850 | $1,020 | $1,200 | Oil only; standard access assumed |
| Tank cleaning | $200 | $350 | $600 | Depends on tank condition and access |
Delivered heating oil prices across Washington State
For household budgeting, a useful statewide estimate is $4.25-$6.00 per gallon, or roughly $850-$1,200 for 200 gallons. Smaller fills can have a higher effective per-gallon price if a supplier charges a minimum-delivery fee. Quotes may also differ according to whether the price is fixed when ordered, indexed to the delivery date, or part of a service plan.
Use $5.10 per gallon as a comparison benchmark, not a guaranteed statewide rate. Suppliers can change posted prices frequently, so a written quote should specify the gallons, delivery charge, payment terms, and any minimum order. Assumptions: residential No. 2 heating oil, ordinary truck access, standard delivery, and no tank repair.
What a 200-gallon heating oil quote includes
Most routine orders are primarily fuel, but delivery terms and account fees can change the invoice. The ranges below are planning estimates; some suppliers include delivery in the per-gallon price rather than listing it separately. Ask whether taxes, account charges, or emergency service are included before comparing offers.
| Quote item | Low | Average | High | Typical basis |
|---|---|---|---|---|
| Heating oil | $4.25/gal | $5.10/gal | $6.00/gal | 200 gallons: $850-$1,200 |
| Standard delivery | $0 | $25 | $75 | May be included or waived |
| Small-order or minimum fee | $0 | $35 | $100 | Often applies below supplier minimum |
| Tank inspection | $0 | $100 | $200 | Separate service visit |
| Emergency delivery | $50 | $125 | $250 | Added to fuel in some service areas |
Compare the delivered total, not just the advertised price per gallon. A low fuel rate can be offset by a small-load fee, while a higher posted rate may include routine delivery. If a quote includes a service plan, request its annual fee and included labor separately.
How gallons, driveway access, and tank condition change the quote
Order size is one of the clearest price drivers. At $5.10 per gallon, 100 gallons is about $510 and 250 gallons is about $1,275 before extra charges. Some companies set a minimum of 100-150 gallons or charge more for smaller drops. Tank capacity alone does not determine the order: available space and the customer’s requested fill level matter.
Delivery access also affects cost. A long hose run, locked gate, steep or narrow driveway, or a tank located in a difficult-to-reach basement may require special arrangements or a service fee. A leaking, corroded, or inaccessible tank can prevent delivery until repaired. Confirm truck access and tank condition before scheduling to avoid a failed delivery or separate repair visit.
Labor for oil-system service is commonly billed around $100-$175 per hour, with diagnostic or dispatch charges often around $100-$200. A one-hour burner adjustment therefore might add $100-$175 in labor, apart from parts or a separate call-out fee.
Ways to lower a Washington heating oil bill
Compare at least three delivered quotes for the same quantity and delivery window. Ask each supplier to list the per-gallon price, minimum order, delivery fee, payment surcharge, and any automatic-delivery charge. A quote based on a 200-gallon drop is not directly comparable with one based on 100 gallons.
Ordering before the tank reaches a critical level can reduce the chance of paying for emergency service. If storage capacity and household cash flow allow, compare a larger delivery with repeated small fills, but do not exceed the tank’s safe fill limit. Keep the fill pipe, driveway, and access route clear so the truck can complete the drop without extra labor.
Fuel-saving maintenance can reduce consumption, though it does not change the supplier’s per-gallon price. An annual burner tune-up often costs $150-$300, depending on service scope. Replacing filters and correcting airflow issues may improve operation; a technician should assess the system before costly upgrades are assumed necessary.
Why Seattle, Puget Sound, and eastern Washington quotes differ
Prices vary by supplier coverage, route density, and competition. A practical comparison allowance is about 3%-10% above a local base quote for remote or low-density delivery areas; dense service routes may sometimes be 2%-5% below a less competitive nearby market. These are budgeting adjustments, not fixed regional tariffs, and individual suppliers may price differently.
Western Washington customers should not assume proximity to a port guarantees cheaper residential delivery. Retail pricing includes distribution, truck routing, and supplier operating costs. In eastern and rural areas, fewer nearby delivery routes can affect minimum quantities, scheduling, or trip fees. Request a quote using the delivery ZIP code and tank location rather than relying on a statewide average.
When seasonal buying and service fees affect the total
Heating demand typically rises during cold weather, while severe weather can delay routes or tighten delivery availability. Prices also move with wholesale fuel markets, so a seasonal pattern does not guarantee that summer purchasing will be cheaper. A fixed-price or capped-price plan may reduce exposure to price changes, but enrollment fees, payment rules, and cancellation terms can change its value.
Tank cleaning commonly costs $200-$600, while replacement of a residential oil tank can run about $1,500-$4,000 installed, depending on capacity, location, and required piping work. Those are not ordinary delivery costs and should appear as separate line items. If a supplier recommends cleaning or replacement, ask for the condition found, the scope of work, and whether a repair alternative is available.
Three delivery examples for comparing real quotes
These examples use the $5.10-per-gallon planning average and illustrate how order size and service needs change the bill. Actual supplier rates and fees may fall outside these examples, especially in remote areas or during urgent cold-weather calls.
- Small top-off: 100 gallons at $5.45 per gallon equals $545; a $35 minimum-order fee brings the estimated total to $580.
- Routine delivery: 200 gallons at $5.10 per gallon equals $1,020; with a $25 delivery charge, the estimated total is $1,045.
- Fuel plus tune-up: 250 gallons at $4.85 per gallon equals $1,212.50; a $225 burner service brings the estimate to $1,437.50.
For a fair comparison, match gallons, delivery timing, and included services before selecting the lowest total. Ask whether the displayed price is locked at order placement or can change before the truck arrives.