"3% cash back" means you earn 3p for every pound spent on eligible purchases. For instance, if you spend £100 on a qualifying purchase, you’ll receive £3 in cash back rewards.

This rate is often offered on premium credit cards for specific spending categories such as dining, travel, or groceries. Over time, these rewards can add up, providing a valuable way to save on everyday expenses.

How 3% cash back is calculated

To find 3% of any amount, multiply it by 0.03. So 3% of £100 is £3.00, and 3% of £1,000 is £30.00. As a cash back rate, that's 3 pence back for every £1 you spend.

3% of common amounts

Amount 3% of it
£20 £0.60
£50 £1.50
£100 £3.00
£200 £6.00
£500 £15.00
£1,000 £30.00
£2,000 £60.00

How 3% compares over a year

A percentage point sounds small and isn't. Here's what 3% returns against the other common rates, at spend levels people actually reach.

Spend per year 3% 1% 1.5% 2%
£5,000 £150 £50 £75 £100
£10,000 £300 £100 £150 £200
£25,000 £750 £250 £375 £500
£50,000 £1,500 £500 £750 £1,000

At £50,000 a year, the difference between 3% and 1% is £1,000. Worth weighing against annual fees, category caps and whether the higher rate applies to everything you buy — a flat 3% on all spending often beats a higher rate on one category.

How This 3% Cash Back Calculator Works

This calculator helps you estimate your earnings at a 3% cash back rate based on your spend amount.

How 3% cash back is calculated

  • Cash back rate: You earn 3% back on every dollar/pound spent.

How to use this calculator

  1. Enter your purchase amount or total spend.
  2. The calculator instantly shows your cash back earnings.
The calculator shows:
  • Cash back earned: spend × 3%

How it's calculated

  • Cash back = spend × 0.03
Examples: A £33 purchase would earn you £1.00 in cash back. A £1,000 purchase would earn you £30.00 in cash back.

This calculator provides estimates. Actual earnings may vary based on eligible purchase categories and program terms.

Full breakdown: For data sources and deeper math, see our Full Rewards Methodology.

Frequently asked questions

What is 3% cash back?

3% cash back means you will receive 3p (£0.03) back for every £1 spent.

Robert Flowers III
Written by Robert Flowers III · Founder, Developer, and Programmer

Robert Flowers III is the founder and developer of The Point Calculator, a multi-region credit-card rewards calculator he launched in 2017 after earning a bachelor’s degree in mathematics with a minor in computer science. A seasoned traveler who began collecting points and miles in 2015, Robert has visited more than 15 countries—often flying and staying at top hotels using rewards—and holds elite status with several programs. He designs and codes every calculator himself, continually researching program updates so readers can accurately estimate rewards, compare cards, and maximize the value of their points and miles.

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