The best time to buy propane in Colorado
How to think about timing a propane purchase in Colorado without chasing guarantees: tank level, pre-buy, and winter delivery risk.
There is no reliable date that is always cheapest. What you can control is not running low in the middle of winter, comparing quotes before you need fuel, and deciding whether a pre-buy contract fits your tolerance for risk.
Why people look at summer
Heating demand is lower in warm months, and many suppliers offer early-fill or pre-buy programs then. Whether the price is actually lower in a given year depends on the market and the supplier, so treat summer as a good time to shop, not a promise of a discount.
What tank level has to do with it
A homeowner at 40 percent in October has options. A homeowner at 12 percent in January does not. Running low can mean urgent-delivery terms, a scheduling squeeze, or both.
- Check your gauge at the start of the heating season.
- Ask your supplier what percentage they treat as a reorder point.
- Remember tanks are generally filled to a safe maximum, not to 100 percent.
Buying a full tank versus a partial one
A larger drop can lower the delivery cost per gallon if the supplier charges a fixed trip cost or minimum, but it ties up more cash at once. Ask for quotes on both.
Hypothetical: partial versus full fill
A supplier charges a hypothetical flat $60 delivery fee.
| 100 gallons at $3.00 + $60 fee | $360 ($3.60 per gallon all-in) |
|---|---|
| 300 gallons at $3.00 + $60 fee | $960 ($3.20 per gallon all-in) |
| Difference in all-in cost per gallon | $0.40 |
All dollar figures in this worked example are hypothetical round numbers chosen to show the arithmetic. They are not EIA data, not a quote, and not a prediction.
Checklist
- Read your tank gauge in early fall.
- Collect at least two written or recorded quotes before you need fuel.
- Ask whether pre-buy locks price, caps it, or only reserves a supplier.
- Confirm what happens if you do not use all pre-bought gallons.
- Keep your supplier's emergency number somewhere visible.
Official sources
- EIA Heating Oil and Propane Update. Survey schedule and methodology for the October-March residential price survey.
- EIA Energy Explained: propane prices. Background on what moves propane prices.
- EIA Colorado residential propane series (W_EPLLPA_PRS_SCO_DPG). The official weekly Colorado series with observation dates.
Related guides
Frequently asked questions
- Is summer always cheaper?
- No. It often has less demand pressure, but the market can move either direction.
- Should I wait for a price drop?
- Waiting is a bet. If it leaves you low in winter, the downside can outweigh the possible savings.
- Does this site recommend a supplier?
- Location pages label an editorial pick as Picked by Colorado Propane Prices. Picks are not tested rankings, so compare coverage and get other quotes too.
Content reviewed October 5, 2026. Dates of data observations are separate and shown at the source.
Location picks reflect Colorado Propane Prices’ editorial judgment, not independent testing. Confirm every supplier’s coverage and delivered price directly. General information only; not a quote, not professional advice, and no price is guaranteed.