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SIM-only vs phone contract

Once your handset is paid off, staying on the same mobile contract usually means overpaying — you're still paying handset prices for just a SIM. Here's how to work out which option is actually cheaper for you.

Last updated: October 2026

The handset trap

  • Most phone contracts bundle the handset cost into the monthly price over 24 months. After that, the phone is yours — but the bill often stays the same.
  • Your provider must notify you when your minimum term ends. Treat that message as your cue to act, not to ignore.
  • Check your bill: if it hasn't dropped since your contract ended, you're almost certainly overpaying.

Do the maths

Compare the total cost, not the monthly figure in isolation:

  • Add up a SIM-only deal over 24 months, plus the outright price of the phone you want. Compare that with the 24-month total of a bundled contract for the same phone.
  • Factor in what you'd get for your current phone if you sold or traded it in.
  • Remember data needs honestly — paying for 100GB you never use is wasted money whatever the deal type.

When SIM-only wins

  • Your phone is paid off and you're happy keeping it — this is the classic SIM-only moment.
  • You want flexibility: 30-day rolling SIMs let you leave or change deal any month.
  • You use Wi-Fi most of the time and need only a modest data allowance.

When a contract still makes sense

  • You need a new handset and can't or don't want to pay upfront.
  • The bundled total genuinely beats SIM-only plus outright purchase — it happens, especially with promotions.
  • You value spreading the cost evenly, as long as you've checked the total isn't inflated.

Frequently asked questions

Can I keep my number when I switch?

Yes. Text PAC to 65075 for a switching code, give it to your new provider, and your number moves over — usually the next working day.

Are SIM-only deals really cheaper?

Almost always, once the handset is paid for. You're no longer repaying a phone, so the monthly price reflects just calls, texts and data.

What happens if I do nothing when my contract ends?

You roll onto a rolling contract at the same (or sometimes higher) price. Nothing bad happens, but you keep paying handset-level prices indefinitely.

Should I buy the phone outright?

If you can afford it, usually yes — you can then pick the cheapest SIM-only deal freely and switch whenever a better one appears.

Keep reading

Related: broadband contracts have the same end-of-term trap.

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