I was sitting in the Costco gas line, four cars deep, waiting for pump number three, contemplating my life choices. Everyone always says Costco gas is an amazing deal—but according to who? It got me thinking: Is this actually worth it? How much am I really saving, and does it justify getting a Costco membership just for the gas?

Instead of just wondering, I took it as a personal challenge. I pulled the data for 12 cities across the US, including my local warehouse right here in New York. After crunching the numbers, I found the exact break-even point for the new $65 Costco membership in both gallons and miles. I was pretty surprised by what I found. Let’s get to it.

🔑 KEY POINTS

• We checked gas prices across the country to determine whether the membership is worth it if you only buy gas.
• In states like California, Colorado, Florida, Hawaii, Nebraska, New York, and Texas, the savings make it a no-brainer.
• In states like Illinois, Washington, and Georgia, you are highly unlikely to break even—even if you fill up exclusively at Costco.

📊 The Methodology (How I Found the Numbers)

I selected a sample of 12 Costco gas stations across the country, making sure every major geographic area was represented (Northeast, Southeast, Midwest, Central US, Southwest, and West Coast). I grabbed the costs of both regular and premium gas at those locations on February 24, 2026, and compared them directly to the state average using AAA data.

From there, I calculated the exact difference between the state average and the Costco price to determine how many gallons of gas you’d need to buy to cover the Gold Star membership fee ($65 as of 2026). I also used a conservative 25 miles per gallon to determine exactly how many miles you need to drive to break even.

⛽ The Data: Costco vs. The Street Price

Across our test cities, Costco was an average of $0.28 per gallon cheaper than the state average. Hawaii actually had the biggest savings at $0.61 per gallon (with Colorado right behind it at $0.53). On the flip side, in Chicago, you’re only saving a single penny! Here’s how the rest stacked up:

🚗 The Break-Even Point: How Many Miles Does It Take?

We all love the food choices, but what if you only got your gas at Costco? How long until you break even on a standard $65 Gold Star Membership?

Here is the math: $65 ÷ [Your Average Savings] = Total Gallons Needed. We then multiplied those gallons by an average of 25 miles per gallon to determine how many miles you need to drive to break even.

According to the most recent data from the U.S. Department of Transportation, the average American drives approximately 11,408 miles a year.

This means that in states like California, Colorado, Florida, Hawaii, Nebraska, New York, and Texas, the membership easily pays for itself if you frequently fill up your tank at Costco. But if you live in states like Illinois, Washington, or Georgia? You are highly unlikely to ever break even on gas alone.

⚖️ The Hidden Variables (When It’s NOT Worth It)

While the math looks great in some states, there are a few real-world variables to consider before you join:

• The Time Tax: If you have to wait 20 minutes in line to save $1.60 on a 10-gallon tank, you are valuing your time at just $4.80 an hour. Is that worth the hassle to you?
• The Detour: If Costco is 10 miles out of your way, the gas you burn just driving there will eat up your savings.
• Premium Gas: On average, the savings on Premium (93 octane) are even higher than regular ($0.33 vs. $0.28), making the break-even point quicker for luxury car drivers. However, in some states, such as Illinois and Washington, Costco’s premium was actually higher than the state average!

🛒 Why is Gas So Cheap at Costco?

Costco gas is cheap for the exact same reason they sell rotisserie chickens as a loss leader: to drive foot traffic. They want members to head to the warehouse to fill up their tanks, and then wander inside to fill up their shopping carts since they are already in the parking lot.

The company also runs on razor-thin margins. That, coupled with their massive bulk purchasing power, allows them to keep prices below the state average. According to Barron’s, Costco is one of the nation’s largest gasoline sellers, pumping “about 17 million gallons a day, or roughly 5% of the U.S. market.”

🏆 Final Verdict

Yes! If Costco is on your normal commute and you live in a state with a decent price gap, the gas alone easily pays for the $65 card. Anything you buy inside the warehouse is just a bonus.

But now that the gas has paid for your membership, it’s time to make sure you aren’t overpaying inside. Don’t let your hard-earned fuel savings go to waste on overpriced groceries. [Sign up for our newsletter and download the free ‘Essential 25’ Price List] to get the exact target prices for the 25 items you should actually be buying on every Costco run.

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