Pay for what you use.
Not a penny more.
The best pay as you go SIM deals in the UK. No contracts, no credit checks, no direct debits. Top up when you need it and stop when you do not.
The only true top-up pay as you go SIM we compare is 1p Mobile, where calls, texts, and data all cost 1p per unit on the EE network, and your credit lasts up to a year. If you use your phone most months, a flexible 30-day plan usually beats topping up: Talkmobile's 15GB plan at £5.95 per month is the cheapest we track, and neither option ties you to a contract.
Best pay as you go SIM deals right now
1p Mobile Pay As You Go
Talkmobile 15GB
Talkmobile 80GB
VOXI 60GB
Chattr 50GB
Ecotalk 10GB
Chattr Freedom One (Unlimited)
Prices checked August 2026 and may change. Click through to see current offers and confirm availability.
PAYG vs SIM only: which is right for you?
Pay as you go is better if...
- You only use your phone occasionally
- You want zero monthly commitment
- You need a temporary or backup SIM
- You have no credit history or prefer no credit check
SIM only is better if...
- You use your phone regularly every month
- You want a fixed predictable monthly cost
- You need a large data allowance every month
- You want the cheapest price per GB
The honest truth is that most people who think they need PAYG would actually save money on a 30-day rolling SIM only plan. Talkmobile's 15GB plan at £5.95 per month has no contract, works out cheaper than topping up if you use more than a few hundred MB a month, and you can leave at the end of any month. That is effectively PAYG freedom with the value of a monthly plan.
Classic top-up PAYG is really only better if you genuinely use your phone very infrequently, and that is exactly where 1p Mobile shines: at 1p per minute, text, and MB, a £10 top-up can last a light user months, and credit stays valid for up to a year. If you are keeping an old number active, buying a first SIM for a child, or need a UK number temporarily, that is where it makes sense. For everyone else, a flexible 30-day plan is the smarter move. See our full SIM only comparison for more options.
Questions people ask
A pay as you go SIM lets you use calls, texts, and data without a monthly contract. You top up credit when you need it and only pay for what you use. No credit checks, no direct debits, no exit fees. Good for occasional users, backup SIMs, or anyone who wants zero commitment.
Pay as you go means you top up credit and spend it as you go with no regular payment. A SIM only plan charges a fixed amount each month for a set allowance. SIM only plans are cheaper per GB if you use your phone regularly. PAYG is better if you use your phone infrequently or want zero commitment.
Most PAYG SIMs deactivate if unused for around 180 days. Your credit may also expire depending on the network. If you are keeping a number active without using it much, make at least one call or text every few months to keep the SIM alive. Check the specific terms of your chosen network.
Yes. Ask your current provider for a PAC code and give it to your new network when you sign up. Your number transfers automatically, usually within one working day. You do not need to contact your old provider again once you have the code.
For true top-up pay as you go, 1p Mobile is the standout: 1p per minute, text, and MB on the EE network, with credit that lasts up to a year. If you use your phone most months, a flexible 30-day plan is usually better value, with Talkmobile from £5.95 and Chattr's unlimited at £15, both contract-free. The right choice depends on coverage at your location and how much you actually use your phone.
Related deals and guides
Not sure if PAYG is right for you?
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