Which credit card should I use for gas?

Gas-category rewards versus general purchase rewards

Some cards offer an elevated earn rate at gas stations, while others earn the same rate on every purchase. A card with a gas bonus can earn more per dollar at the pump, but if you also buy snacks, a car wash, or other items inside the store, those purchases may or may not be classified as gas depending on the merchant's coding. A general-purpose card with a strong base rate can sometimes outperform a gas-specific card once those mixed purchases are considered.

Merchant-specific fuel bonuses

Certain cards offer bonuses tied to specific fuel brands or merchant families rather than to a broad gas-station category. These bonuses can take the form of a higher earn rate, a per-litre discount, or points awarded per unit of fuel. Because these bonuses are tied to specific merchants, a card that is strong at one gas station may not be strong at another. Knowing which merchants a card bonuses can matter as much as the headline rate.

Comparing percentage rewards with per-unit fuel rewards

Gas rewards come in different forms: a percentage of the purchase amount, points per dollar spent, or a per-litre rate. A 2% cashback rate and a 3 cents-per-litre discount are not directly comparable without converting both into an estimated value for your purchase. The per-litre value depends on the fuel price and the number of litres, while the percentage depends on the total spend. Converting each reward into an estimated dollar value for the same purchase is what lets you compare them fairly.

Spending caps and restrictions

Some gas bonus rates apply only up to a monthly or annual spending cap, after which the rate drops. Other cards may exclude certain gas-station types or require the purchase to be classified as an automated fuel dispensing transaction. If you fuel up frequently or buy other items at the station, a cap or restriction can change which card earns the most over time.

Gas-station merchant classification

Not every gas-related purchase is classified the same way. A traditional gas station, a warehouse-club fuel kiosk, a grocery-store fuel program, and a convenience store that also sells fuel can carry different merchant category codes. A card's gas bonus may apply to some of these and not others, so the same fill-up can earn different rewards depending on where you buy.

How MAXtap helps with gas purchases

Add the cards you already carry to your MAXtap wallet, search for the gas station or select the gas category, and MAXtap compares the applicable catalogue rules — including category rates, merchant-specific bonuses, caps, and estimated reward value — to estimate which of your cards may provide the most value for that purchase.

Frequently asked questions