Free tool
True cost calculator
Put in any two deals — two contracts, or a contract against buying the phone outright with a SIM plan — and see the whole bill for each over the same period, including the fixed annual price rises contracts now have to state in pounds and pence, and any cashback you'll actually claim.
How it works
Total = upfront + every monthly payment over the period (each year's payments including that year's rise) − cashback. The true monthly cost is that total divided by the number of months. It is the same calculation we use to rank every deal on the site — see why the headline price misleads.
Only count cashback you are sure you will claim. Redemption cashback usually needs several claims on time — here's what to watch for.