How much is gas at Costco?
In June 2026, Costco regular gas averages about $3.93 per gallon nationally, typically running 15 to 30 cents below the national average. Prices change daily and vary widely by state, so your local warehouse may be higher or lower.
Cost breakdown
| Option | Price | Notes |
|---|---|---|
| Regular (national avg) | ~$3.93 / gal | June 2026 average across U.S. Costco warehouses; updated daily. |
| Premium | ~$4.55 / gal | About $0.62 above regular at most locations. |
| Diesel | ~$5.20 / gal | Available at many but not all Costco fuel stations. |
| Savings vs. local | 15–30¢ / gal less | Costco typically prices below nearby stations and the national average. |
| Regional spread | ~$1.00–$5.04 / gal | California warehouses near the top, lowest-cost regions far below. |
What Costco gas costs right now
As of June 2026, Costco's regular gasoline averages about $3.93 per gallon nationally, with premium around $4.55 and diesel near $5.20. Those are averages — Costco fuel typically runs 15 to 30 cents per gallon below the broader national average, which is a big part of why its stations stay busy and often have lines during peak hours.
Prices have been moving. Nationally, regular pump prices eased roughly 63 cents over the prior month, down from about $4.56, after a spike tied to overseas supply disruptions. That kind of swing is normal, which is why any single quoted figure is only a snapshot of where prices sit on a given day.
Why the price changes daily
Costco gas prices, like all gas prices, reset frequently and vary station to station. They track the wholesale cost of crude oil and refined fuel, which moves with global supply and demand, geopolitical events, seasonal blend changes, and refinery conditions. When crude jumps or a region's supply tightens, pump prices follow within days.
Location matters enormously. State taxes and regional fuel rules create huge gaps — California warehouses sit near the top of the range while some regions are dramatically cheaper, a spread that can exceed several dollars per gallon. The most reliable way to know your price is to check your specific warehouse, since the national average can be well off from what you will actually pay.
How Costco keeps gas cheap and who can buy it
Costco sells gas cheaply by running high-volume stations with thin margins, treating fuel as a way to drive membership value and store traffic rather than a primary profit center. Tight operations, member-only access, and bulk purchasing let it consistently undercut nearby stations.
In nearly all locations, Costco fuel is restricted to members, so you generally need an active membership to fill up. Members often pay with a cash-back credit card to stack additional savings on top of the already-low pump price. If you are not a member, the discount may not offset the membership fee unless you also shop the warehouse regularly.
Frequently asked questions
- Do you need a membership to buy Costco gas?
- Yes, at almost all locations Costco gas stations are limited to active Costco members, and the pump typically requires a membership card to activate.
- How much cheaper is Costco gas?
- Costco regular gas usually runs about 15 to 30 cents per gallon below the national average, though the exact gap varies by region and day.
- Why does Costco gas vary so much by state?
- State fuel taxes, regional blend requirements, and local supply costs cause large differences, with California among the highest and other regions far lower.
Researched and edited by Calvin Lauderdale, Lead Researcher & Editor. Figures on this page were verified against the sources above as of June 23, 2026.