17 providers offer 191 broadband deals in Merthyr Tydfil, from £20.00 a month and up to 7,000 Mbps. Typical measured speed is 73 Mbps down and 21 Mbps up, 28% below the UK download average.
Best value broadband deal in Merthyr Tydfil
The best value in Merthyr Tydfil on full first-year cost is Plusnet's Full Fibre 145: £292 across year one, about £24 a month. A £155 reward card is bundled in. 145 Mbps covers streaming, video calls and working from home.
Best value in Merthyr Tydfil
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in Merthyr Tydfil
The fastest deal available in Merthyr Tydfil is You 8000 from YouFibre at 7,000 Mbps.
Fastest in Merthyr Tydfil
£99/mo
No rises, no surprises.
£1188 total over 12 months
Cheapest broadband deal in Merthyr Tydfil
The cheapest deal in Merthyr Tydfil is 300Mb Full Fibre (24 Months) from 4th Utility at £20.00 a month for 300 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £20.00 is an intro price that rises to £40.00 a month after the intro window, making the real first-year cost £240. Onestream is essentially level at £20.63 a month.
Cheapest in Merthyr Tydfil
300Mb Full Fibre (24 Months)
300 Mbps upload · Full Fibre
Best for 4–5 person households, heavy use
£20/mo
for 12 months, then £40/mo
Avg £30/mo over contract · £720 total over 24 months
Runner-up on price
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Compare broadband deals in Merthyr Tydfil
£21/mo
rises to £24 in April 2027 (+£3)
Avg £23.25/mo over contract · £558 total over 24 months
Full Fibre 1.6GB Premium
115 Mbps upload · Full Fibre
Best for power users & big households
£33.99/mo
rises to £37.99 in March 2027 (+£4)
Avg £37.32/mo over contract · £896 total over 24 months
Sky Full Fibre Gigafast
100 Mbps upload · Full Fibre
Best for power users & big households
£31/mo
No rises, no surprises.
£749 total over 24 months
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Broadband providers in Merthyr Tydfil
17 providers serve Merthyr Tydfil, with YouFibre the fastest at 7,000 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical Merthyr Tydfil download speed at 73 Mbps.
Upgrade nudge
Room to upgrade in Merthyr Tydfil
Only 8% of the 15,000 connections here are on 300Mbps or faster, even though 73% can get gigabit.
The faster line is already there. For most of these homes it is the contract holding them back, not the infrastructure.
Is your broadband good enough?
The typical Merthyr Tydfil line runs 73 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 73% of Merthyr Tydfil, and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Merthyr Tydfil?
The wholesale networks carrying Merthyr Tydfil broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
These are the alternatives to Openreach in Merthyr Tydfil: smaller infrastructure firms that have laid their own fibre. The pricing pressure they create is good news on a Saturday morning bill review.
- CityFibre: Sky, The One Broadband, Vodafone
- 4th Utility: 4th Utility, Rise Fibre
Sitting alongside, Openreach cover Merthyr Tydfil as well (Openreach is everywhere in the UK by default).
Merthyr Tydfil sits in the catchment of 17 providers.
What broadband coverage does Merthyr Tydfil have?
Superfast broadband reaches 98% of Merthyr Tydfil premises but gigabit only 73%, so around 25% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Merthyr Tydfil?
Outdoor 5G reaches 99% of Merthyr Tydfil homes. Here is how mobile holds up if the line drops.
5G & 4G home broadband
Outdoor 5G covers 99% of Merthyr Tydfil, enough for a 5G home-broadband hub to stand in for a fixed line.
Broadband speeds by Merthyr Tydfil neighbourhood
| Neighbourhood | Median | vs area | Upload | Superfast | Gigabit | 5G |
|---|---|---|---|---|---|---|
| Town CF47 | 75 | +2 | 25 | 99% | 82% | 99% |
| Plymouth CF48 | 74 | +1 | 22 | 96% | 75% | 99% |
| Treharris CF46 | 64 | -9 | 14 | 96% | 46% | 99% |
Measured Ofcom data per Merthyr Tydfil neighbourhood, ranked fastest first. Median and upload are in Mbps; vs area is the median difference from the Merthyr Tydfil average; superfast, gigabit and 5G are the % of premises covered. Swipe the table sideways for more columns.
Browse broadband in Merthyr Tydfil towns
Nearby areas
Frequently asked questions
Ready to switch
See what's actually live in Merthyr Tydfil.
Enter your address and we'll show every deal you can genuinely order on your line, ranked by what you'll pay across the whole contract, not by who pays us.
* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for Merthyr Tydfilcome from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.