Reading time: 10 minutes | Updated: 29th August 2025
Are you looking for a simple way to save money on your family's mobile phone bills? You are in luck because now many UK networks offer fantastic discounts and perks for families who share a contract, making it easier than ever before to get more for your money. Whether you are interested in sharing data allowances to avoid paying for what you do not use or want to take advantage of multi-plan savings, there is a deal out there for you.
At SIM-Only Finder, we have put together this guide to help you understand the options and highlight the best family SIM-only deals currently available. Family SIM-only plans are a great way to cut the cost of your mobile phone bills, especially if you are the primary bill payer for your family.
What To Consider When Choosing a SIM Plan
Choosing the right family SIM deal means considering your household's unique needs. Currently, networks like Three, EE, O2, Vodafone, Smarty, and Tesco Mobile offer various options. Some provide a straight discount for multiple plans, while others, like Sky Mobile with its 'Piggybank,' focus on the flexibility of sharing unused data.
Before you commit, ask yourself: are you prioritising a simple discount or shared data? How many people do you need on the plan? Do not forget to check network coverage and any other essential features like roaming and the quality of the customer service.
EE Multi-Line Discount
EE is a leading choice for families thanks to its flexible Multi-Line Discount. This popular feature offers a significant monthly saving on every additional SIM-only or airtime plan you add to your account, alongside a 10% discount on plans with a device.
What we like about EE is its 'data gifting' service. This allows the primary account holder to transfer data between family members. If one person runs low while another has plenty to spare, you can move data in 500MB increments, ensuring no allowance goes to waste.
For peace of mind, the plan includes valuable controls to help you manage usage, such as setting data caps and restricting international roaming. This is especially useful for accounts with children, helping to prevent any unexpected bills.
As an EE customer, you could unlock further perks, including discounts on EE Broadband and bonus mobile data, making it an even more rewarding option for a connected home. While EE plans may not always be the cheapest, combining these features makes it a fantastic long-term solution.
Three Connect Together
After a period without a dedicated family offering, Three has launched a good option with its 'Connect Together' service. This plan rewards households for consolidating their mobile and broadband services, providing up to a 20% discount on each additional plan you add to your account, for up to six extra plans.
The discount is not limited to just phones. It applies to various services, including SIM-only deals, traditional Pay Monthly plans, and tablet, laptop, and mobile broadband plans. You can also get up to 10% off home broadband, making it a great way to manage all your connectivity needs in one place.
A key feature for simplifying your finances is the single, combined monthly bill, which brings all your household's plans together, eliminating multiple payments and making budgeting easier. It is important to note that if you are on a Pay Monthly phone contract, the generous 20% discount applies to your airtime allowances only, not the handset's cost.
For SIM-only and broadband plans, a 12 or 24-month contract is required to be eligible for the savings. This makes Connect Together a simple and effective way to save money while keeping your family connected.
Vodafone Additional Plans
Vodafone offers a straightforward Additional Plans discount, which simplifies family mobile savings. After taking out an initial full-price plan on a contract of 12 months or more, you can add up to nine additional lines to your account, each benefiting from a 15% discount. This applies across a wide range of products, including SIM Only, Pay Monthly phones, tablets, and mobile broadband, making it a flexible option for a busy household with multiple devices.
It is important to remember that for Pay Monthly plans with a handset, the 15% discount applies to the airtime portion of the bill only, not the physical device itself. While the discount cannot be used with other promotional offers, it still presents an excellent opportunity for long-term cost savings.
Vodafone offers the 'Vodafone Together' scheme for families seeking even more value. By combining your mobile plan with Vodafone home broadband, you can unlock a 30% discount on additional mobile lines and other benefits like exclusive 'VeryMe Rewards.' This makes Vodafone a strong choice for those looking to bundle all their connectivity needs with a single, reliable provider.
O2 Multisave
O2's Multisave plan is an attractive option for families of all sizes. It allows you to add up to a whopping 20 connections to a single account. The main benefit is a 20% discount on the airtime portion of every eligible additional plan, which can lead to substantial savings across the household.
The beauty of Multisave is its flexibility. Each family member can have a different type of plan, from a high-data SIM-only deal to a tablet or a Pay Monthly handset contract, all while benefiting from the discount. The airtime reduction is a key detail, as it applies to your monthly allowances rather than the cost of a device itself.
It is worth noting that the discount applies to additional lines, so your first connection won’t receive the saving, and it cannot be combined with other offers. However, for a large family looking for a single, easy-to-manage solution, O2 Multisave offers a fantastic combination of savings and convenience, plus all members get access to the network’s exclusive O2 Priority rewards.
Tesco Mobile Family Perks
Tesco Mobile's Family Perks is an excellent alternative choice for families looking for more flexibility in their data usage rather than having a straightforward financial discount. Once you have two or more eligible Pay Monthly plans on a single account, everyone on your plan can choose a free monthly perk tailored to their needs, with up to four additional subscriptions permitted.
The perks themselves are where the real value lies. Each family member can select from options including bonus data (up to 1GB), money off the bill (up to £2), extra Clubcard points, or a discount on Tesco Mobile Protect insurance. This is perfect for households with varying priorities, and you can even change your perk each month to suit your changing needs.
Unlike many other family deals, the lead account holder is also eligible for a perk, ensuring everyone benefits directly. With the added advantage of earning Clubcard points on every bill and a guarantee of no mid-contract price rises, Tesco Mobile provides a unique, rewarding, and highly flexible solution for keeping your family connected and saving money.
Smarty Group Plan
Smarty offers a different kind of family deal with its flexible Group plan. While the discount is a straightforward 10% off each additional SIM, the real value comes from Smarty's already low-cost, no-contract plans. You can add up to eight people to a single account, and each member can choose their own plan with differing allowances.
This freedom to choose your individual allowance is a significant benefit, as it means you are not locked into a long-term contract and can change or cancel your plan with just one month's notice if it no longer meets your needs. For the group owner, who is usually responsible for paying the phone bill, managing everyone's usage, payments, and add-ons is streamlined through a single dashboard, simplifying household mobile bills.
A unique feature of Smarty is its money-back plans, which give you a discount for any data you do not use, on top of the Group plan savings. This is an ideal way to ensure you never pay for data that goes to waste. Combining this with no credit checks and the inherent low prices, Smarty is a fantastic, no-fuss option for families prioritising simplicity and affordability.
Sky Mobile Piggybank
Sky Mobile has taken a unique approach to family plans with its 'Piggybank' feature. Instead of offering a flat discount, it focuses on maximising the value of your data. While you don't share your monthly allowances, any unused data from up to seven family SIMs is automatically rolled into a communal 'Piggybank' at the end of each month, where it can be stored for up to three years.
Anyone on the account can then use this pooled data whenever they need a top-up, acting as a flexible safety net that prevents data from going to waste. This is particularly good for households with varying data needs, ensuring everyone gets what they require without costly add-ons.
Beyond sharing, your saved data can also be redeemed for rewards, such as discounts on new phones and accessories. Coupled with benefits like data-free streaming of Sky apps and the ability to change your plan each month, Sky Mobile is a fantastic choice for families who want to get the most out of their mobile spend.
Honest Mobile Family SIMs
Honest Mobile offers family plans which reward loyalty with a unique tiered discount system. While some networks offer a fixed discount, Honest Mobile's Family SIMs start with a solid 20% off on a 30-day rolling contract. This discount increases each month until it reaches a maximum of 30%. For those who prefer immediate savings, opting for a 12-month contract grants an instant 30% discount.
This scheme is a great way to save a significant amount over time. You can add up to 10 SIMs to a single account, all managed with one simple bill. While Honest Mobile is a SIM-only provider and doesn't offer devices, its plans are flexible, and each family member can have different allowances to suit their needs.
Beyond the savings, Honest Mobile's appeal extends to its ethical stance as a carbon-negative company. When you pair it with no credit checks on its flexible, no-contract plans, it is ideal for environmentally conscious families who value long-term value, simplicity, and a clear conscience.
1pMobile Unlimited Boost
1pMobile takes a fair and reasonable approach to family plans with its Unlimited Boost deal, designed to provide exceptional value for heavy data users. While the lead SIM is a £25 a month unlimited data plan, any additional SIMs you add to the group cost just £12.50 each.
The most unique aspect of this offer is that the total monthly cost is divided equally among all members. This means the initial SIM is not stuck with the full price; everyone benefits from the shared savings. For example, a family of four would pay a total of £62.50, which is then split evenly, costing each person just £15.62 for unlimited data, minutes, and texts.
Operating on the reliable EE network, 1pMobile offers strong coverage and fast speeds. The plan is also a no-contract, 30-day rolling deal, meaning you can change or cancel without penalty. This simple, transparent, and highly cost-effective model makes it a fantastic choice for families looking for a fair way to get unlimited data.
Conclusion
The best family SIM deal for you goes further than choosing a network with the biggest discount. To find the best fit for your household, consider these key factors. First, weigh up a plan that offers a direct discount versus one that provides data sharing. While discounts are generally attractive, a data-sharing plan—like Sky Mobile's Piggybank—can be invaluable if family members have inconsistent data usage, ensuring no one runs out while others have data to spare.
Next, look at the contract length and flexibility. Some networks lock you into a 12 or 24-month commitment, but others, like Smarty, offer rolling 30-day plans, giving you the freedom to change or leave anytime. It is also wise to check how easy it is to add or remove people as your family grows and their needs change.
Finally, remember to look at the bigger picture. A family discount on an expensive base plan might not be the best option for overall cost savings. Always check the network's local coverage, speeds, and roaming policies. Extra perks like Wi-Fi Calling and data rollover can also add significant long-term value, making a seemingly simple choice a far more strategic one.
