Best 12 month broadband deals: November 2025
Dan Howdle • November 20th, 2025
Our top 12 month broadband deals
These are our hand-picked selections for the best 12 month broadband contracts available right now. These deals are perfect if you value flexibility. Be aware that some may have slightly higher monthly costs or setup fees compared to longer-term plans, but the freedom can be worth it.
1. Onestream Fibre 40
£18 per month • £4.95 upfront cost
Onestream Fibre 40 is part-fibre (FTTC) broadband using the Openreach network. It provides average download speeds of 38Mbps and average upload speeds of 9Mbps. The plan includes unlimited data and is available on a 12-month contract.
Fibre 40
Over 20,000 5-star reviews on Trustpilot
35Mb
Average speed
No phone line
12
Month contract
£4.95 upfront cost
£18.00 Per month
Effective monthly cost is calculated by adding up all the monthly costs, price rises and any discounts and dividing it by the contract length.
Add an unlimited Three 5G SIM card. Free for 6 months, then £15pm – Save £90.
2. Three 4G Unlimited Home Broadband
£21 per month • Zero upfront cost
Enjoy flexible 4G home broadband on a 12-month contract from Three. Get unlimited data and instant Wi-Fi. No landline, no engineer—just plug and play.
4G Unlimited Home Broadband
150Mbps average download speeds30-day money back guaranteeNext day delivery
4G
Average speed
No phone line
12
Month contract
Zero upfront cost
£21.00 Per month
Effective monthly cost is calculated by adding up all the monthly costs, price rises and any discounts and dividing it by the contract length.
Easily compare the best deals, providers and speeds where you live. It's free and takes less than a minute to check your postcode.
3. Onestream Supreme Full Fibre 80
£21 per month • £14.95 upfront cost
Supercharge your home with Onestream Supreme Fibre 80. This reliable full-fibre (FTTP) package delivers average speeds of 74Mbps, perfect for 4K streaming, online gaming, and busy households. Enjoy totally unlimited data with no usage caps.
Supreme Full Fibre 80
Over 20,000 5-star reviews on Trustpilot
74Mb
Average speed
No phone line
12
Month contract
£14.95 upfront cost
£21.00 Per month
Effective monthly cost is calculated by adding up all the monthly costs, price rises and any discounts and dividing it by the contract length.
Add an unlimited Three 5G SIM card. Free for 6 months, then £15pm – Save £90.
4. Rebel 115 Broadband
£35 per month • £50.00 upfront cost
Rebel's 115 Broadband isn't all that much faster than its entry-level Fibre Broadband package. The two packages co-exist because the 74Mbps package is Standard Fibre, and you won't be offered it if you can get Full Fibre. You'll be offered this package instead, and the two cost the same.
115 Broadband
Fixed price guaranteeFirst bill payable upfront
115Mb
Average speed
No phone line
12
Month contract
£50 upfront cost
£35.00 Per month
Effective monthly cost is calculated by adding up all the monthly costs, price rises and any discounts and dividing it by the contract length.
Don't forget, you can compare all broadband deals available where you live using our comprehensive broadband comparison.
Our expert advisors have access to special offers and can create a personalised package just for you. Give us a call!
Call 0330 221 9424Pros and cons of 12 month contracts
A 12 month deal isn't for everyone. Here's a quick overview of the main advantages and disadvantages to consider before you sign up.
- Flexibility – The main benefit. You're not tied into a long-term commitment, making it perfect if you plan to move house in the next year or two.
- Good for renters and students – Ideal for 12 month tenancy agreements, letting you align your broadband contract with your housing.
- Often more expensive – Providers reward loyalty, so the monthly price for a 12 month deal may be a few pounds higher than an 18 or 24-month equivalent.
- Potential setup fees – To offset the shorter contract, some providers will charge an upfront activation or setup fee that is often waived on longer deals.
- Fewer choices – Not all providers offer 12 month contracts, especially on their very fastest full fibre plans, so your range of options might be smaller.
Which providers offer 12 month broadband?
While the market is dominated by longer contracts, several providers are known for offering 12 month options. These often include:
- Onestream
- Rebel
- Various smaller independent full fibre providers (e.g., BeFibre, Hyperoptic)
Big names like Sky, Virgin Media, and BT tend to default to 18 or 24-month contracts, but it's always worth checking as they sometimes introduce 12 month plans as special offers.
