Will my UK business mobile work in Republic of Ireland?

Yes. Republic of Ireland is on the 83-destination inclusive roaming list. Your UK allowance works normally in Ireland — minutes, texts and data at UK rates.

Are calls to Northern Ireland the same as calls to Republic of Ireland?

No. Northern Ireland is part of the UK, so calls there come out of your UK minutes allowance like calling anywhere else in the UK. Republic of Ireland is international — inclusive on CTN but drawn from a separate international bundle.

Which UK network has the best coverage in Ireland?

UK networks roam in Ireland via Irish partner networks — Vodafone UK partners with Vodafone Ireland, Three UK with Three Ireland, EE with either. Urban Irish coverage (Dublin, Cork, Galway) is good across all UK networks. Rural Irish coverage (Connemara, West Cork, Donegal) can be patchy on any UK network.

Business Mobile for Irish-Connected UK Businesses (2026): Calls + Roaming to Ireland Included

Name: Compare The Networks
Address: Unit 3, Battlefield Enterprise Park, Shrewsbury, SY1 3FE, GB
Telephone: +441743598025
Price range: Free comparison service
Rating: 4.3

Last updated: April 2026

UK-Ireland business ties are enormous — construction, hospitality, agriculture, distribution, professional services, tech. If you run a UK business with family, staff, suppliers or customers in the Republic of Ireland, your mobile contract should treat calls to Ireland and roaming in Ireland as normal business activity, not international extras.

CTN business tariffs include both as standard. Calls from UK to Irish numbers come out of the international bundle (200, 500 or unlimited minutes depending on tariff); roaming in Ireland uses your UK allowance at UK rates.

Why this matters for UK-Irish businesses

Ireland is one of the UK's closest trading partners and one of the largest sources of UK-based immigrant business owners. Typical scenarios we see:

Construction firms with Irish site managers and trades — Dublin and Cork-born tradespeople running UK businesses, calling home regularly
Hospitality chains with Irish-owned pubs and restaurants — Irish-themed and Irish-owned venues from London to Glasgow, maintaining supplier and cultural ties with Ireland
UK retailers with Republic of Ireland suppliers — food and drink particularly (cheese, spirits, meat), with weekly supplier contact
Haulage firms on the Rosslare / Dublin / Belfast corridors — daily UK-Ireland movements
Tech businesses with Dublin offices — Ireland as an EU gateway post-Brexit, many UK tech firms have Dublin satellites
Agricultural businesses — especially cross-border in Northern Ireland and the border counties
Medical professionals — many UK-based doctors, nurses and consultants trained in or with ongoing connections to Ireland

For each of these, international minutes for Ireland calls and inclusive roaming when travelling there turn the mobile bill into a predictable line item instead of a variable cost.

What's included

Calls from UK to Republic of Ireland — landlines and mobiles, included in your international bundle. Irish landlines mostly start +353 1 (Dublin), +353 21 (Cork), +353 91 (Galway). Irish mobiles mostly start +353 8.
Roaming in Ireland — full UK allowance (data, calls, texts) at UK rates when physically in Ireland. No roaming uplift.
Roaming in Northern Ireland — Northern Ireland is UK domestic, so standard UK allowance applies automatically
Calls between UK and Northern Ireland — UK domestic, always free on standard UK plans

One subtlety: Northern Ireland uses UK mobile networks (EE NI, Vodafone NI, O2 NI, Three NI). Republic of Ireland uses separate Irish networks (Vodafone Ireland, Three Ireland, Eir). Inclusive roaming means your UK SIM connects to these Irish networks at UK rates when you cross the border.

Specific scenarios

A UK-Ireland haulier

Drivers running ferries out of Holyhead, Fishguard, Pembroke, Cairnryan or Liverpool into Dublin, Rosslare or Belfast. Phone works the whole route — Wales/Scotland (UK domestic), ferry (may drop signal), Irish roads (inclusive roaming), Dublin deliveries (roaming), back to UK.

An Irish-owned restaurant group in the UK

Three London-based pubs, Irish-owned. Weekly calls to Cork for suppliers, personal calls to Galway for family, roaming when directors visit Ireland. All on standard CTN business tariff.

A UK construction firm with Irish PMs

PMs originally from Dublin, site visits quarterly to family, calls home to parents regularly. SIM works identically in Shrewsbury, Dublin and London.

A cross-border agricultural business

Cattle farmer near the NI-Republic border. Dealings with marts in both jurisdictions, phone switches between UK and Irish networks depending on where they're stood. No roaming uplift thanks to inclusive Ireland.

A UK tech firm with a Dublin office

Founder and 2-3 staff commute monthly. Calls from London HQ to Dublin colleagues = inclusive international. Travelling to Dublin = inclusive roaming. One tariff covers both directions.

What about Northern Ireland?

Worth being explicit: Northern Ireland is part of the UK. Any UK business mobile tariff treats Northern Ireland as domestic:

Calls from GB to NI — UK minutes, always free
Roaming in NI on a UK SIM — not roaming; it's domestic UK coverage
Calls from NI to Republic of Ireland — on CTN, come out of the international minutes bundle (same as calling Ireland from GB)
Roaming in Republic of Ireland on a Northern Irish SIM — uses inclusive roaming, identical to GB SIMs

If your UK business is based in Northern Ireland with regular Republic of Ireland contact, CTN's tariff structure works identically.

The "flexible working" angle

Since Brexit and COVID, a lot of UK-based Irish professionals relocated to Ireland part-time. Kids go to school there, they work from Ireland some weeks. Technically "the right answer" for someone living 50% in Ireland is an Irish SIM — but in practice, many keep their UK SIM and rely on inclusive roaming.

This works well within fair-use (up to ~60 days of EU-primary use per year). Beyond that, networks are within their rights to query usage. CTN's tariff is designed for regular business use including extended trips, not permanent relocation.

Pricing

For a typical UK business with Irish ties:

Solo / sole trader — 25GB tariff, 200 international minutes — ~£22-26/month
5-person SMB — mix of 25GB and 50GB tariffs — ~£24-28/user
15-person firm, heavy Ireland caller — 50GB / 500 international for most, 100GB unlimited for senior staff — ~£26-32/user

All on 36-month terms with fixed annual increases (£2.50 + VAT per user per month each April — in line with OFCOM's 2025 rules).

FAQs

Are calls to Republic of Ireland the same as calls to Northern Ireland on CTN?

No. Northern Ireland is UK domestic — calls there come out of your standard UK minutes allowance, same as calling London. Republic of Ireland is international — calls come out of your international minutes bundle (200, 500 or unlimited depending on tariff). Both are inclusive on CTN, but from different pools.

Will my CTN SIM work when I visit Ireland?

Yes. Republic of Ireland is on the 83-destination inclusive roaming list. You use your UK allowance in Ireland at UK rates — minutes, texts, data all included as if you were in the UK.

Can I move a Republic of Ireland mobile number to a CTN UK SIM?

Porting Irish numbers to UK carriers is technically possible but complex (cross-border regulatory steps, involving both Irish and UK regulators). In practice, most customers port their existing UK number to CTN and let us set them up with a fresh SIM. If you're starting fresh in the UK with no existing UK number, we can issue a new number at no cost.

What about fair-use limits for extended stays?

Inclusive roaming is designed for travel, not permanent residency. Fair-use guidelines allow approximately 60 days per year of EU-primary use. Spend more than that consistently connected to Irish networks and providers may query the usage. If you genuinely split your time 50:50 between UK and Ireland, a different arrangement (local Irish SIM for your Ireland time) may be more appropriate — happy to discuss.

Which UK network is best for coverage in Ireland?

Networks handle roaming through partners in Ireland — Vodafone UK partners with Vodafone Ireland, Three UK with Three Ireland, EE with whichever Irish network gives best coverage. Coverage in Ireland is broadly similar across all UK networks' partners. Rural Irish coverage (Connemara, West Cork, Donegal) can be patchy on any network; urban coverage (Dublin, Cork, Galway, Limerick, Waterford) is good across the board.

Does CTN do Northern Ireland contracts?

Yes. Northern Ireland is UK domestic for business mobile purposes. All CTN tariffs are available to NI-registered businesses on identical terms.

Getting a quote

Call 01743 598025 or request a quote. Tell us about your Ireland usage — regular calls, occasional travel, both — and we'll scope a tariff mix that covers it without surprises.