Costco Propane Refill: $13-15 for a 20lb Tank in 2026
Costco Propane: What You Need to Know
$2.80-$3.00/gallon (2026). The cheapest retail propane option in the US. Regional variation is minimal - Costco prices propane as a member benefit.
$13-15. At 3.76 gallons filled (80% of 4.7 gal capacity), $2.90 average per gallon = $10.92. The $13-15 range reflects variation by region and member pricing quirks.
Not every Costco warehouse carries propane. Most fuel station locations do, but some suburban and urban warehouses don't. Always call ahead before making a trip specifically for propane.
An active Costco membership is required. Gold Star ($65/year) is sufficient. Business memberships ($65/year) also work. No same-day membership purchase at the fuel station.
Costco fuel station hours are shorter than warehouse hours - typically open slightly later and close earlier. Check your local warehouse hours before going.
Use costco.com/warehouse-locations to find your nearest Costco, then call the fuel station department to confirm propane availability.
Membership Break-Even Math
Costco Gold Star membership: $65/year. Average savings vs Tractor Supply ($18.50 avg for 20lb): $4.50/fill. Break-even: 15 fills.
| Refills/year | Saved vs TSC | Net vs $65 membership |
|---|---|---|
| 10 | $45 | -$20 |
| 15 | $67.5 | +$2.5 |
| 20 | $90 | +$25 |
| 25 | $112.5 | +$47.5 |