Flat-Rate or Category Cards for Everything Else Spend
Find the break-even between one simple flat-rate card and juggling bonus categories, using your own spending rather than a rule of thumb.
There are two ways to earn rewards on everyday spending. You can use one simple card that pays the same rate on everything, or several cards with bonus categories, matching each purchase to the best one. Category cards can earn more. The question is whether the difference is worth the effort for you.
The cards and numbers in this guide are illustrative.
The flat-rate baseline
A flat-rate card pays one rate on every purchase, often around 1.5% or 2%. It has three big advantages:
- No thinking at the checkout.
- No caps to track.
- No missed bonuses because a purchase coded unexpectedly.
Treat the flat-rate card as your baseline. Any other card has to beat it by enough to justify using it.
The extra value from categories
Here’s a household spending $30,000 a year on cards, with $8,000 on groceries, $3,000 on dining, $2,000 on gas and $17,000 on everything else.
- Flat-rate only (2%): $600 a year.
- Category setup: Card A at 3% on groceries (no cap in this example), Card B at 3% on dining and gas, and the 2% card for everything else. That’s $240 + $150 + $340 = $730 a year.
The category setup earns $130 more, about $11 a month. At $15,000 of yearly spending in the same proportions, the gap shrinks to about $65.
The cost of complexity
Category setups have costs that don’t show in the arithmetic:
- Mistakes. Using the wrong card, or missing that a store codes differently.
- Caps. Spending past a cap without switching cards.
- Time. Tracking, reading terms and checking statements.
- More accounts. More due dates to manage, and more risk of a missed payment, which would cost more than a year of extra rewards.
Be honest about how much attention you’ll really give it.
Where the break-even falls
A simple test: work out the extra yearly rewards from a category setup, then ask whether you’d do the tracking for that amount. Many people find:
- Under about $50 a year extra: stick with one flat-rate card.
- About $50 to $150: a two-card setup (one category card for your biggest category, plus a flat-rate card) catches most of the value.
- Over $150: a fuller category setup may be worth it, if you’ll actually follow it.
These thresholds are a starting point, not a rule. Use your own numbers.
Mixing both
The most common good answer is a mix: one or two category cards for the categories where you spend the most, and a flat-rate card for everything else. See how many cards your spending needs.
Common questions
Is a 2% card good enough? For many households, yes. It earns most of what a complex setup would, with none of the effort.
How much more can category cards earn? It depends on how concentrated your spending is. Big spending in one or two bonus categories makes the gap larger.
What counts as “everything else” spending? Anything that isn’t in one of your cards’ bonus categories: clothes, home goods, services, medical bills and so on.
Can I use cash back and points cards together? Yes. Just compare them at a conservative cash value per point.
This guide is general education, not individual financial advice. Pay your cards in full each month.