News · 12 November 2026
O2 Household Saver: what the extra-SIM discount really costs
From 12 November 2026, O2 has swapped its Multisave discount for Household Saver: cheaper prices on extra Pay Monthly plans added to an account that already has an eligible O2 plan. The headline is a 3GB SIM for £9 a month, but O2's own shop says it rises to £11.50 in April 2027 and £14 in April 2028. Taken out this month, that's £11.71 a month over the 24-month contract.
Quick answer: O2 Household Saver started on 12 November 2026 and replaces Multisave for new groups. The 3GB Mini SIM is £9 a month, rising to £11.50 in April 2027 and £14 in April 2028 — £11.71 a month over 24 months if you start in November 2026. Existing Multisave customers keep 20% until they upgrade, and can change their group until 17 December 2026.
By The SimSift team · Published · Figures checked 12 November 2026
What changed
O2 launched Household Saver on 12 November 2026. Add a SIM Only plan, phone or tablet to an account with an eligible Pay Monthly plan (or buy several plans at once) and you get a lower price on each extra one (O2 Household Saver).
Multisave closed to new groups the same day. Existing groups can add or remove numbers in My O2 until 17 December 2026. If you're already in one, you keep the 20% Multisave discount until you next upgrade. You cannot have Multisave and Household Saver on the same connection.
O2 says the saving is "up to £15" a month per extra plan, or up to £360 over 24 months on a SIM Only plan (up to £540 over 36 months on a handset plan, according to ISPreview's report of O2's announcement).
Who it affects
- O2 Pay Monthly customers thinking of adding a partner's or child's SIM. The extra user doesn't need to live at your address; the plan just goes on your account.
- Multisave customers. Nothing changes now, but you lose Multisave when you upgrade, and you can't change your group after 17 December.
- Not eligible as the main plan: 30-day SIM Only, watch plans, the Essential plan and plans already on Household Saver (O2).
- Can't stack: Family & Friends, Student and O2 Open discounts don't work with Household Saver (O2 Extras do).
What it costs (true monthly cost)
Prices below are the exclusive Household Saver figures from O2's SIM Only shop on 12 November 2026, with the Household Saver toggle turned on, for 24-month contracts. "True monthly cost" is everything you pay over those 24 months, including O2's stated April rises, divided by 24.
Method, for a start in November 2026: 5 months at the starting price (November to March), 12 months at the April 2027 price, then 7 months at the April 2028 price. For the 3GB Mini: 5 × £9 = £45, 12 × £11.50 = £138, 7 × £14 = £98. Total £281 ÷ 24 = £11.71. Start in December and it's £11.92, because you have one fewer month at £9 and one more at £14.
| Plan (24 months) | Starting price | From Apr 2027 bill | From Apr 2028 bill | True monthly cost (Nov 2026 start) |
|---|---|---|---|---|
| SIM Only Mini, 3GB | £9.00 | £11.50 | £14.00 | £11.71 |
| SIM Only Classic, 20GB | £10.00 | £12.50 | £15.00 | £12.71 |
| SIM Only Mini, unlimited | £16.00 | £18.50 | £21.00 | £18.71 |
| SIM Only Classic, unlimited | £17.00 | £19.50 | £22.00 | £19.71 |
| SIM Only Classic, 100GB | £14.00 | £16.50 | £19.00 | £16.71 |
| SIM Only Plus, 20GB | £11.99 | £14.49 | £16.99 | £14.70 |
| SIM Only Plus, 100GB | £15.99 | £18.49 | £20.99 | £18.70 |
| SIM Only Plus, unlimited | £18.99 | £21.49 | £23.99 | £21.70 |
| SIM Only Ultimate, 20GB | £16.99 | £19.49 | £21.99 | £19.70 |
| SIM Only Ultimate, 100GB | £20.99 | £23.49 | £25.99 | £23.70 |
| SIM Only Ultimate, unlimited | £23.99 | £26.49 | £28.99 | £26.70 |
These are all 11 24-month Household Saver SIM plans O2's shop showed with the toggle on, at 11:52 UK on 12 November 2026. Each airtime rise is £2.50 in April 2027 and another £2.50 in April 2028, which matches the figures O2 prints on each card and the general rule on O2's prices page (voice airtime plans rise by £2.50 each April; data-only and smartwatch plans rise by 75p). Unlimited plans are subject to O2's fair-use policy.
Phone and tablet Household Saver prices were not added to the table. They depend on the device as well as the airtime, and O2's public phone listing does not show a single airtime-only price for "30GB Classic" or "unlimited Classic" without choosing a handset. O2's announcement, as reported by ISPreview, listed handset Classic starting airtime of £15 (30GB) and £22 (unlimited), plus the device. We have not confirmed those two airtime prices or their April rises on O2's own shop, so they are not in the true-cost table. On the airtime part, O2 says the device payment stays frozen.
Things to watch:
- Cancel the main plan within 30 days and the extra SIMs move to full price on a 30-day rolling plan (Household Saver terms).
- £9 becomes £14 by year two. That's a 56% rise on the headline price within the contract.
- EU roaming up to 25GB is included on Household Saver plans, according to O2 and ISPreview.
What to do
- Already in Multisave? Sort out who's in your group before 17 December, and don't upgrade just for Household Saver without comparing: your 20% discount ends when you upgrade.
- Adding a cheap SIM for a child? Compare the 3GB Mini's true cost of £11.71 against SIMs with no mid-contract rises. A small-data SIM elsewhere can cost less with no main-plan tie-in.
- Adding a second unlimited plan? The Mini unlimited works out at £18.71 a month, and Classic unlimited at £19.71, if you start in November 2026. Compare that total with standalone unlimited deals that don't rise mid-contract.
- Switching is free: text PAC to 65075 to keep your number.
Questions people ask
What is O2 Household Saver?
It's a lower price on extra Pay Monthly plans added to an O2 account that already has an eligible Pay Monthly plan (or when you buy more than one plan at once). The extra plan does not have to be for someone who lives at your address. 30-day SIM Only, watch plans, the Essential plan and plans that already have Household Saver pricing cannot be the main qualifying plan.
What happens to O2 Multisave?
O2 closed Multisave to new groups on 12 November 2026. Existing groups can add or remove numbers in My O2 until 17 December 2026, and keep the 20% Multisave discount until they next upgrade. You cannot have Multisave and Household Saver on the same connection.
How do you work out the true monthly cost?
For a 24-month contract starting in November 2026: 5 months at the starting price (November to March), 12 months at the April 2027 price, then 7 months at the April 2028 price. Add those 24 payments and divide by 24. A later start costs more, because more of the contract sits on the later prices. Device payments on a phone plan are separate and do not rise.
Can I use other O2 discounts with Household Saver?
O2 says other airtime discounts cannot be used with Household Saver, apart from Extras. That includes Family & Friends, Student and O2 Open.
Compare on SimSift
Sources
- O2: Household Saver page, FAQs and small print (primary)
- O2: SIM Only deals, Household Saver prices and April rises (primary, checked 12 November 2026 at 11:52 UK)
- O2: annual price increase (primary, £2.50 each April on voice airtime)
- O2: Household Saver terms (eligibility and cancellation)
- ISPreview, 12 November 2026: O2 launches Household Saver, replaces Multisave
Figures checked 12 November 2026 against O2's own pages. O2 can change offers at any time. True monthly figures assume a November 2026 start. SimSift is operated by Helihex Network Ltd. This article has no affiliate links.
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