Costco Propane Refill: $13-$14 for a 20lb Tank in 2026
Costco Propane: What You Need to Know
$2.77-$3.02/gallon, pegged to the EIA national residential average of $2.674 plus a small warehouse-club markup. The cheapest retail propane option in the US. Regional variation is minimal at Costco - they price propane as a member benefit.
$13-$14. At ~4.7 gallons for a full fill (the 20 lb rating already reflects the 80% volumetric safety limit) at $2.90 mid-point per gallon. The displayed range reflects regional variation around the EIA-pegged baseline.
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 |