If you fill up regularly, mark your calendar: OnePay is offering $1 cashback per gallon of gas purchased every Wednesday, running through 9/15/26. The offer caps at 50 gallons and allows two redemptions per day, which works out to up to $50 back on a single Wednesday if you’re maximizing it.
What the deal actually is
OnePay is a fintech app, not a credit card, so this isn’t a rewards-card offer in the traditional sense — it’s a cashback promotion tied to using OnePay for gas purchases on Wednesdays. The math is straightforward: $1 back for every gallon, up to 50 gallons, with the ability to redeem twice in a single day. For most drivers filling a single tank, that’s well short of the 50-gallon ceiling, but households running multiple vehicles or a family with more than one driver could realistically use both redemptions.
Who this is best for
This is most useful for Southern families who drive long distances regularly — think commuters logging highway miles between suburbs and city centers, or families road-tripping during peak summer travel season. If gas is already a meaningful chunk of your monthly budget, stacking a $1-per-gallon Wednesday cashback on top of your regular fill-ups adds up fast, especially across a household with two cars.
It’s less compelling if you drive infrequently or already have a gas rewards credit card that gives you strong ongoing cashback on every fuel purchase, every day of the week — not just Wednesdays.
How it compares
The appeal here is the per-gallon structure rather than a percentage-back structure, so it’s easy to calculate exactly what you’re getting before you fill up. The tradeoff is timing: because it’s Wednesday-only, it doesn’t help if your tank runs low on a Friday before a weekend trip, and you’ll want to plan fill-ups around the offer day if you’re trying to get the most value out of it.
For everyday, every-day-of-the-week fuel savings, a rotating-category or flat-rate gas rewards credit card is worth having as a complement — you can use that the rest of the week and lean on OnePay specifically on Wednesdays.
Caveats
A few things to know before you count on this: the offer is capped at 50 gallons and two redemptions per day, so it won’t stretch across a whole week’s worth of driving. It’s also only confirmed through 9/15/26, so treat it as a summer-and-early-fall perk rather than a permanent feature. And since OnePay is an app-based cashback program rather than a credit card, you’ll need to have the app set up and be using it at the pump to actually capture the savings.
Bottom line
If you’re a regular Wednesday driver — commuting, running errands, or road-tripping this summer — this is worth setting up before your next fill-up. Southern families juggling long commutes and summer travel miles stand to get the most out of it, especially if you can time a fill-up (or two) for Wednesday specifically.