5Gb Broadband Deals Ireland (October 2026)
Prices updated 11 October 2026
What is the cheapest 5 Gbps broadband deal?
The cheapest 5 Gbps plan we track is Fibre 5Gb from eir, at an estimated €499.88 over a first year and €47.82 a month averaged across its 24-month contract. 3 plans from 2 providers are sold at this speed. Across every speed, the cheapest plan on the market is eir Fibre 500Mb at €319.88.
Advertised pricing as of 11 October 2026. Availability varies by eircode — confirm with the provider before ordering.
Every 5 Gbps broadband plan compared
All 3 plans advertised at 5 Gbps download, ranked by estimated first-year cost with setup fees added and one-off credits deducted. To compare across speeds, use the full broadband comparison.
| Provider | Plan | Technology | Opening rate | Then | Term | First year | Avg/month |
|---|---|---|---|---|---|---|---|
| eir | Fibre 5Gb | Full fibre | €49.99/mo × 24 | €89.99/mo | 24 mo | €499.88 | €47.82/mo |
| Sky | Broadband Ultrafast Max 5Gbps (24-month offer) | Full fibre | €53/mo × 24 | €90/mo | 12 mo | €636 | €53/mo |
| Sky | Broadband Ultrafast Max 5Gbps (12-month offer) | Full fibre | €55/mo × 12 | €90/mo | 12 mo | €660 | €55/mo |
Cheapest 5 Gbps plan from each provider
If you already know which networks reach your address, this is the shorter read: one row per provider, showing its best plan at this speed and whether it raises the price mid-contract.
| Provider | Best plan | First year | Avg/month | Mid-contract rise |
|---|---|---|---|---|
| eir | Fibre 5Gb | €499.88 | €47.82/mo | +€4/mo a year |
| Sky | Broadband Ultrafast Max 5Gbps (12-month offer) | €660 | €55/mo | No annual rise |
5Gb Broadband in Ireland
Five-gigabit broadband is the fastest residential tier sold in Ireland and the least widely available. It runs only over full fibre, only where the network has been built for it, and the first question for any address is not price but whether it can be delivered at all — every provider selling it has an availability checker, and it is worth using before reading any further.
For almost every household this is more capacity than there is any way to use. The honest test is whether you can currently saturate a gigabit connection, and the overwhelming majority of homes cannot: a household would need several simultaneous multi-gigabit transfers to notice the difference, and consumer devices are not generally built to receive them. The realistic buyers are people moving very large media files as a job, or households where a gigabit demonstrably runs out.
The equipment problem is sharper here than at 2 Gbps. A single ethernet port on ordinary consumer hardware carries one gigabit, so a 5 Gbps service can only be consumed through multi-gigabit networking equipment, and Wi-Fi will not reach these speeds in a normal house regardless of the standard on the box. Anyone buying this tier should budget for the switch and network cards as part of the cost.
Prices at this tier are premium but not always dramatically so, because it is used as a flagship. The comparison below shows what each plan actually costs across the first year and across its full minimum term, including setup fees, one-off credits and any contractual annual price rise, which is the only fair way to line up a short cheap contract against a long one.
5Gb Broadband questions
What is the cheapest 5 Gbps broadband deal in Ireland?
The cheapest 5 Gbps plan in our data is Fibre 5Gb from eir, at an estimated €499.88 over a first year — €49.99 a month for 24 months, then €89.99. That figure adds any setup fee and deducts any one-off new-customer credit. Availability is decided by your address, so check the provider's eircode checker before ordering.
Which providers sell 5 Gbps broadband in Ireland?
2 providers in our data sell at this speed: eir, Sky. That is who advertises it nationally, not who can deliver it to you — fixed broadband is sold address by address, and the networks that reach any given house are a matter of where the fibre or cable was built.
Do I actually need 5 Gbps broadband?
Five-gigabit full-fibre plans — the fastest residential tier sold in Ireland, available on a small fraction of addresses. As a rule the number of people using the connection at once matters far more than what any one of them is doing: a single 4K stream needs around 25 Mbps, and a video call rather less. If your connection only feels slow at particular times of day, that is contention between devices, and more headroom helps. If it is slow all the time on one device, the problem is more likely Wi-Fi or the router than the line.
Why is the first-year cost different from the monthly price?
Because almost every plan at this speed is sold on an introductory rate that expires. The first-year column adds twelve months of whatever you actually pay — opening rate while it lasts, standard rate afterwards — plus any setup fee, less any one-off new-customer credit. 1 plan here carries such a credit. The average-monthly column also applies the contractual annual price rise that 1 of these plans carry, from the first anniversary onwards.