Cash Back Calculator

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Cash Back Reward

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Purchase amount

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Cash back rate

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Reward before limit

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Net cost after rewards

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Note: This calculator is for illustrative purposes only and does not constitute financial advice. Reward caps and category bonuses vary by card issuer.

Calculators

Figure out your credit card cash back reward from the purchase amount and reward percentage, factor in a per-purchase or annual cap if your card has one, and see the net cost once the reward is applied.

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Want to know how much cash back a purchase actually earns you? Enter the amount, your card's reward rate, and any cap that applies, and you'll see the reward, the net cost, and the math behind it.

How to use this cash back calculator

  1. Choose a currency symbol for display (no exchange-rate conversion).
  2. Enter your purchase amount and the cash back rate offered by your card or program.
  3. Optional: set a cash back limit if your card caps rewards per purchase or per period.
  4. Click Calculate: your reward, net cost after rewards, and calculation steps update on the right.

What is cash back?

Cash back works on a simple premise: spend a dollar or a pound, and a percentage of it comes back to you, usually as a statement credit, a direct deposit, or a gift card. Reward rates typically land between 1% and 5%, with higher promotional rates showing up during limited-time offers. It’s been a staple of credit card rewards since Discover introduced it back in 1986, and today plenty of issuers run flat-rate or category-based programs of their own.

How cash back is calculated

The math couldn’t be simpler: multiply the purchase price by the cash back percentage. Run it through our Cash Back Calculator and a $100 purchase at 2% comes back as $2 in rewards.

Apply your card’s reward rate to eligible spend

Worked examples

  • $15 at 1% comes to $0.15 cash back (the calculator’s default values)
  • $100 at 2% earns $2.00 cash back, putting your net cost around $98
  • $500 at 5% with a $20 cap calculates out to $25, but the reward gets capped at $20

How cash back programs work

  1. Make a purchase: use your cash back credit card, or shop through a cash back portal.
  2. Earn rewards: a percentage of what you spent gets credited to your rewards balance.
  3. Redeem: claim a statement credit, bank deposit, gift card, or whatever else your issuer offers.

Maximizing your cash back

  • Choose the right card: a higher rate in the categories where you actually spend, groceries, gas, dining, usually beats a flat 1% across the board.
  • Use special offers: activate issuer promotions to grab bonus cash back on targeted merchants.
  • Stack rewards: combine card cash back with store loyalty programs, coupons, or shopping portals whenever that’s allowed.
  • Know your caps: plenty of cards limit earnings per quarter or per purchase, so enter your limit into the calculator to see the real payout.
  • Pay in full: interest charges can wipe out the value of any reward, so clearing your statement balance each month keeps the full benefit intact. The Credit Card Payment Calculator can help model a payoff timeline.

Examples and use cases

Real-world use cases

  • Grocery rewards card: a household estimates roughly $40 back each month on $2,000 of monthly spend at 2%, before deciding between a flat-rate card and a category-based one.
  • Promotional cap: a shopper checks whether a 5% electronics promo runs into the $25 quarterly cap on a $600 laptop purchase.
  • Portal stacking: an online buyer weighs 3% portal cash back plus 1% card rewards against a single 4% store card offer.

Need percentage discounts instead? The Percent Off Calculator covers that, the Sales Tax Calculator handles tax, and the Commission Calculator works out commission earnings.

Common questions

Quick answers before you start calculating.

It hands back a percentage of eligible spending, typically as a statement credit, deposit, or gift card. The Cash Back Calculator just multiplies your purchase amount by your card's reward rate.