Cashback calculator
Estimate a rewards card’s annual cashback across spending categories, after caps and the annual fee.
Assumes even spending month to month, which is what makes a monthly cap bite. Cashback earned on a balance you carry is worth far less than the interest charged on it.
How this is worked out
Cashback = Σ min(category spend × rate, cap) − annual feeWhat this assumes
A calculator is only as good as what it leaves out. These are the assumptions built into the result above.
- Spending is even month to month. Uneven spending changes what a monthly cap pays out.
- Caps apply per cap period, which is how issuers usually set them.
- A welcome bonus counts towards year one only, and only if your spending meets the requirement.
- Cashback earned on a balance you carry is worth less than the interest you pay on it.
Educational information only. This page explains how something works in the United Kingdom. It is not financial advice and does not take account of your circumstances. Rates, fees and eligibility change without notice — check the provider’s own terms before you act.
For free, impartial guidance, see MoneyHelper. To complain about a firm, contact the Financial Ombudsman Service.
Guides that go with this tool
How Credit Card Interest Works in the UK
The interest-free period, how the daily rate is applied, what Section 75 gives you, and what the minimum payment is actually designed to do.