The Finance Algorithm

Cashback Calculator

Calculate your annual cashback earnings from credit card spending

Updated October 2026Built and checked by MaverickHow it's calculatedReport an error

Your numbers

Updates as you type
$
$3k
%
1%

Standard rate on all purchases (typical 0.5-1.5%)

$
$600
%
3%
$
$300
%
2%
$
$100
$
$0

0 = no cap. Many cashback cards limit monthly earnings.

The button asks our AI to explain these figures in words.

Cashback calculator

Net annual

$440

after $100 fee

Gross cashback

$540

1.50% effective rate

Worth it?

Yes

cashback covers fee

Cap lost

None

no cap

Where your cashback comes from

Cards that pay more in some categories, such as groceries or fuel, pay off most when those are where you spend.

$540annual cashback
Base spending46.7%
Groceries40.0%
Fuel13.3%

Gross cashback vs after-fee net

A high-fee premium card only wins if its bonus rates / earn rate justifies the extra cost.

$540Gross cashback$440After annual fee

Net cashback at different annual fees

At what annual fee does this card stop being worth it? The crossover point is where the bar touches zero.

$540$0$490$50$441$99$391$149$290$250$140$400
Pay in full every month. Cashback is genuinely free money only if you avoid interest. At 20%+ revolving rates, carrying any balance vaporises a year of cashback in a few months. Treat the card as a free 1-2% debit card, not a borrowing facility.

How it works

A cashback card gives you a slice of what you spend back as cash. Whether that beats a card with no annual fee depends on how much you spend, which is what this works out.

  1. 1Enter your total monthly spending
  2. 2Add the base cashback rate
  3. 3Break out spending in bonus categories
  4. 4Include the card's annual fee
  5. 5See your net annual cashback

The figures today

As of 7 November 2026, the lowest credit card purchase rate is 7.49%, from Unity Bank's Low Rate Visa Credit Card, while the typical best across 51 institutions is 12.49%.

Worked examples

Category Cashback Card

$3,000 a month of spending: $600 on groceries at 3%, $300 on fuel at 2% and the rest at 1%. $100 annual fee.

Total monthly spending
$3,000
Base cashback rate
1%
Monthly grocery spending
$600
Grocery cashback rate
3%
Monthly fuel spending
$300
Fuel cashback rate
2%
Card annual fee
$100
Monthly cashback cap
$0

Groceries earn $216 a year, fuel $72 and everything else $252: $540 in all, or $440 after the fee - an effective 1.5% back.

Questions people ask

Is cashback or points better?
Cashback is simpler and its value is fixed. Points can be worth more, but only if you put in the work to redeem them well. If you won't, cashback usually comes out ahead.
Do I pay tax on credit card cashback?
No - the ATO treats cashback as a rebate/discount on purchases, not as income. It's not taxable.
What's a good cashback rate?
Compare the effective rate the calculator shows - total cashback less the fee, as a share of your spending - with other cards, and with no-fee cards that pay no cashback.

The terms, in plain English

Cashback
A percentage of spending returned as cash - either as statement credit, check, or deposit.
Category Cap
Maximum spending that earns bonus rates in a category per quarter/year.
Rotating Categories
Bonus categories that change quarterly - must be activated each quarter.

Official sources