Guides & Insights
Data-driven credit card guides, comparisons, and rewards strategies.
How OptimalCardSetup Finds Your Mathematically Optimal Card Setup
A deep dive into the CP-SAT solver, integer programming, and how we prove — not guess — the best credit card combination for your spending.
Chase Sapphire Preferred vs Reserve: Which One Should You Get?
A data-driven comparison of the CSP ($95/yr) and CSR ($550/yr). We break down the math to show exactly when each card is worth it.
How to Maximize Credit Card Rewards: The Complete Strategy
Stop leaving money on the table. A systematic approach to earning the most from your credit card rewards, backed by math.
Capital One Savor vs Amex Blue Cash Everyday: Best No-Fee Cash Back Card
Two of the best $0 annual fee cash back cards compared. Which earns more — the Savor's 3% dining/grocery/streaming combo or the BCE's 3% gas/grocery/online combo? We do the math.
Amex Gold vs Citi Strata Premier vs Chase Sapphire Preferred: Best Mid-Tier Rewards Card
Three of the best mid-tier rewards cards compared head-to-head. We break down earn rates, transfer partners, and the math behind each card.
Credit Card Points for Beginners: What They Are, How They Work, and How to Use Them
New to credit card rewards? This guide covers everything — point currencies, transfer partners, redemption strategies, and how to avoid common mistakes.
When Is an Annual Fee Card Worth It? The Break-Even Math
Annual fee cards can earn hundreds more per year — or be a waste of money. Here's exactly how to calculate whether a fee card pays for itself.
Cash Back vs Travel Rewards: Which Strategy Wins?
Compare the two main credit card reward strategies — simple cash back vs transferable travel points. We break down the math, personality fit, and when each approach wins.
The Best $0 Annual Fee Card Combinations
You don't need to pay annual fees to earn strong rewards. These 2-3 card setups cost nothing to hold and can earn $1,400-$1,800/year on typical spending.
Understanding Spending Caps and Tiered Earn Rates
Many bonus rates have spending limits that reset quarterly or annually. Learn how caps, tiers, and choose-your-category cards work — and how to optimize around them.
The 2026 Annual Fee Wave: Sapphire Reserve, Amex Platinum, and What It Means for Your Setup
Premium card fees jumped sharply — CSR to $795, Amex Platinum to $895. Here's the new break-even math and how to decide whether to keep, downgrade, or switch.
Flat 2% Cards vs Category Cards: When Simple Wins
A flat 2% card beats complex category setups more often than enthusiasts admit — but loses badly in specific spending patterns. Here's where the line is.
Discover Cards Are Moving to Capital One on July 27 — What Actually Changes
Discover it Cash Back and Discover it Chrome cardholders are being migrated to Capital One systems starting July 27, 2026. Here's what Capital One says will change, what won't, and how to check your setup still works.
Amex Platinum Tightens Centurion Lounge Access Starting July 8
American Express is cutting Centurion Lounge access for connecting passengers to a 5-hour pre-departure window and closing the same-flight guest loophole. Here's what changes and what doesn't.
Amex Gold vs Amex Platinum: Which Amex Card Actually Pays for Itself?
Amex Gold ($325) vs Amex Platinum ($895): we compare earn rates and run the numbers on which credits are realistically usable versus which just look good on paper.
Bilt Obsidian vs Amex Gold: Rent Rewards vs Food Rewards
Bilt Obsidian ($95) and Amex Gold ($325) solve completely different problems — one earns on rent, the other on dining and groceries. Here's how the math actually works.
The Average 2-Card Wallet Leaves About $190/Year on the Table
We ran the live solver across four real spending profiles at a 2-card limit vs. a 5-card setup. The average gap: about $191/year, or roughly 23% more in net rewards.
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