Circle K is offering 40 cents off gas. Here’s when – and why.

A Circle K gas station at 52nd Street and McDowell Road in Phoenix posts its gas prices on May 16, 2025.© Cheryl Evans, The Arizona Republic/USA TODAY Network

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Convenience store chain Circle K has a back-to-school deal that’s good for your gas tank and wallet.

Circle K, which has more than 4,000 stores in 22 states, is giving members of its Inner Circle loyalty program 40 cents off per gallon on Thursday, Aug. 21. The Inner Circle Fuel Day deal is good that day from 6 a.m. to 11:59 p.m. local time.

To get the Inner Circle Fuel Day deal, customers must enter the phone number associated with their Inner Circle account at the gas pump or inside the store at checkout before their transaction. (Offer good at participating Circle K Fuel locations; one-time use only.)

Over the past 12 months, Circle K has had 40-cent price reduction Fuel Day promotions for Memorial Day, Thanksgiving and Labor Day.

“The back-to-school season is exciting, but it can also bring extra financial strain, which is why it’s the right time for us to bring back Fuel Day for our valued customers, new and existing,” said Louise Warner, Circle K’s executive vice president of operations for North America, in a news release. “We want to be a trusted member of the communities we serve, so we are pleased to make it a little easier for families with great savings all day at the pump as well as the everyday value of Inner Circle.”

How to join Circle K’s Inner Circle to get 40 cents off per gallon of gas

You can join the Inner Circle loyalty program to instantly get the Aug. 21 40-cent price discount on gas. You can go to the Circle K website or download the Circle K app to create an account.

Members also save 3 cents per gallon every day and when you have spent $500 on gasoline, food or beverages at Circle K, you get upgraded to being a Premium Member and save 5¢ per gallon.

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