Smarter cards. Stronger strategy.
Card Stack Optimizer helps people with good credit build the right mix of credit cards to maximize rewards on everyday spending, with clear math on every bonus, benefit, and fee.
Free rewards calculator · Google Sheet or interactive PDF · No spam
Every card needs a job.
Most people collect cards one offer at a time. We work the other way: start with where your money actually goes, then give every card a clear role.
Map your spending
List what you really spend each month on groceries, dining, gas, travel, and everything else. Real numbers, not the ones in the ads.
Match categories to cards
Find the card that pays the most in each of your big categories, plus one solid catch-all for the rest. Usually two to four cards, not ten.
Do the math on fees
Every annual fee has to beat a simple no-fee option. If the rewards and benefits you'll actually use don't cover it, the card doesn't make the stack.
Three pillars. No noise.
Pillar 01
Card comparisons
Side-by-side breakdowns of popular cards: earn rates, caps, credits, and the fine print that changes the answer.
Pillar 02
Rewards explained
Points, miles, and cash back in plain English. What a point is really worth, and when a "bonus" is actually a good deal.
Pillar 03
Build your stack
Card combinations for real spending profiles, like families, commuters, and frequent travelers, with the full math shown every time.
Is the fee worth it? Do the math.
Here's the kind of breakdown we show on every card. A $95 card that pays 3% on groceries and dining sounds better than a flat 2% card. For this household's spending, it isn't.
A sign-up bonus can tip year one the other way. That's why we show year one and every year after separately.
| Category | Spend / yr | Card A 3% · $95 fee | Card B 2% flat |
|---|---|---|---|
| Groceries | $6,000 | $180 | $120 |
| Dining | $2,400 | $72 | $48 |
| Everything else (1% / 2%) | $9,600 | $96 | $192 |
| Annual fee | −$95 | $0 | |
| Net rewards | $18,000 | $253 | $360 |
Hypothetical cards and spending, for illustration only. Not a real offer.
Every number traced to a source.
We build breakdowns from primary sources and issuer terms, and we date every comparison so you know when to double-check it.
- Issuer terms Official rates, fees, and reward rules from each card's published pricing and terms. CFPB agreement database
- CFPB Consumer Financial Protection Bureau guidance on card fees, interest, and your rights. consumerfinance.gov
- Federal Reserve Consumer credit data and card interest-rate trends (G.19 release). federalreserve.gov
- IRS How rewards and bonuses are treated for taxes (Publication 525). irs.gov
Math shown, never hidden
Every recommendation comes with the spreadsheet logic behind it.
Fees must earn their keep
A card stays in the stack only if it beats the no-fee option for you.
Commissions don't set rankings
We cover cards whether or not they pay us. Editorial policy.
CSO Annual Rewards Calculator
Enter what you spend in each category. See which card types earn the most there and what your stack is worth per year after fees.
- Fill in your spending by category: groceries, dining, gas, travel, and more
- See the best-fit reward cards for each category
- Get your annual rewards after fees, so every card has to justify its spot
- Pick the format you like: Google Sheet or interactive PDF
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The Credit Card Stack Optimizer System
A complete, step-by-step course for building and running your card stack. It's in the works, and calculator subscribers hear about it first.
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