Pay as you go · cheapest
The cheapest pay as you go SIM
The lowest-priced monthly bundle on each pay as you go network, ranked by what you pay over two years. No contract, no credit check.
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What counts as pay as you go here?
Rolling 30-day bundles you can stop any month, on networks with no credit check.
Is a bundle better than topping up?
Almost always — paying per minute or per MB costs far more than a small monthly bundle.
Do these networks raise prices?
giffgaff, SMARTY, Lebara, Lycamobile and VOXI have no annual rise; Asda Mobile asks you to check at sign-up.
No price rise- Runs on Vodafone
- 30-day rolling plan
- No credit check
- EU roaming on every plan
£5 a month
Get this dealLebara review →Live price, checked several times a day.
Cheapest pay as you go SIM: every network ranked
| # | Network | Data | Contract | Monthly | Credit check | 24 months, rises included | |
|---|---|---|---|---|---|---|---|
| 1 | Lebara | 5GB | 30 days | £5 | None | £120 | Get deal |
| 2 |  Asda Mobile | 3GB | 30 days | £5 | None | £120 | Get deal |
| 3 |  giffgaff | 2GB | 30 days | £6 | None | £144 | Get deal |
| 4 |  SMARTY | 18GB | 30 days | £6 | None | £144 | Get deal |
| 5 |  Lycamobile | 30GB | 30 days | £10 | None on PAYG | £240 | Get deal |
| 6 |  VOXI | 80GB | 30 days | £10 | None | £240 | Get deal |
Cheapest plan per network matching this page, checked 28 October 2026. “24 months” adds each network’s April rise for a plan starting this month; on 30-day plans you can leave before a rise.
How to keep pay as you go cheap
- Always buy a bundle — out-of-bundle rates are where pay as you go gets expensive.
- Turn on auto-renew so you don’t drop onto standard rates when a bundle ends.
- Use Wi-Fi Calling at home; every network here supports it except Asda Mobile.
- Check inactivity rules — a number unused for months can be disconnected.
All matching bundles, live
FAQ
Common questions
What is the cheapest pay as you go SIM?
The first row of the table — today’s lowest 24-month cost for a bundle with at least 1GB.
Does pay as you go credit expire?
Credit usually stays, but networks can disconnect a number that isn’t used for several months.
Can I keep my number?
Yes — text PAC to 65075 and give the code to your new network.