Phase 11 · Travel & Rewards
Credit Card Rewards Calculator
Multipliers look great on the marketing page. Push your real monthly spend through them, net out the annual fee, and see whether the points actually beat a boring flat cash-back card.
How do you calculate credit card rewards?
Multiply each spending category by the multiplier your card pays on it, add them up, then convert with points × cents-per-point ÷ 100. Subtract the annual fee for net value. Compare that against a flat cash-back card earning your total annual spend × its rate. Cash back is exactly 1.0 cent per point; flexible bank points are commonly worth about 1.5–2.0 cents.
- $500/month dining plus $300/month travel at 3× earns (800 × 12) × 3 = 28,800 points a year — $432 at 1.5¢.
- The default scenario here — $2,750/month across all five categories — earns 61,200 points, worth $918 at 1.5¢, or $823 after a $95 fee, versus $660 from a flat 2% card.
- Effective return on spend = net value ÷ annual spend. A flat 2% cash-back card returns exactly 2.00% with no fee to clear.
- Break-even point value = (flat cash back + annual fee) ÷ points × 100 — the cents-per-point your card has to hit just to draw level.
Under the hood
The math, fully exposed
Spend is annualised, each bucket earns at its own multiplier, and points are converted at the value you set. Nothing is hidden:
Worked example at the defaults: $800 a month of dining and travel is $9,600 a year at 3× = 28,800 points; $750 of groceries and gas is $9,000 at 2× = 18,000 points; $1,200 of everything else is $14,400 at 1× = 14,400 points. That is 61,200 points on $33,000 of spend — a blended 1.85 points per dollar. At 1.5¢ they are worth $918, or $823 after a $95 fee, against $660 from a flat 2% card. Break-even point value: ($660 + $95) ÷ 61,200 × 100 = 1.23¢.
- The multiplier is only half the number: your real return on a category is multiplier × cents-per-point. 3× at 1.0¢ is a 3% return; 3× at 1.5¢ is 4.5%. Card marketing quotes the half that looks bigger.
- Base spend decides most outcomes: if the bulk of your money lands in the 1× bucket, a flat 2% card usually wins — the bonus categories never get enough volume to matter.
- The fee is a fixed hurdle, the reward is a rate: low spenders rarely clear an annual fee, high spenders clear it easily. The break-even spend is fee ÷ (earn rate × point value).
- Point value is an assumption, not a fact: cash back is exactly 1.0¢. Flexible bank points are commonly worth ~1.5–2.0¢ used well, but only if you actually redeem that way. Value them at what you really get, not what a valuation chart promises.
- Educational model: this ignores sign-up bonuses, statement credits, category caps, quarterly rotations and the exact merchant codes issuers use to classify spend. It measures ongoing earn, which is the part that repeats every year.
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