The Short Answer
Ireland is not part of the UK immigration system. The two countries share the Common Travel Area, but they issue their own visas and decide their own entry, so a UK visa is not by itself permission to enter Ireland. There are two exceptions, and both are narrow. The Short Stay Visa Waiver Programme lets nationals of 22 listed countries travel on to Ireland after entering the UK on a UK short-stay visa. The British Irish Visa Scheme lets Indian and Chinese nationals use a single visa across both countries, but only if that visa is physically endorsed with the letters 'BIVS'. If neither applies to you, you need an Irish visa of your own, and you should apply for it before you book.
Four Situations, Four Different Answers
British citizens need nothing. Nationals of 22 countries with an eligible UK short-stay visa can use the Short Stay Visa Waiver Programme. Indian and Chinese nationals may hold a BIVS-endorsed visa that covers both countries. Everyone else applies for an Irish visa separately. Working out which of the four you are in is the whole question.
If You Are a British Citizen
The question does not arise. British nationals do not need a visa to visit, live, work or study in Ireland, under the Common Travel Area arrangement that predates both countries' EU membership and survived Brexit. You are not required to hold a passport to cross between the UK and Ireland, but airlines and ferry operators set their own identification rules and most ask for a passport, so travelling without one is a commercial problem rather than an immigration one. Bring it.
The Short Stay Visa Waiver Programme
This is the scheme most people are actually looking for. If you hold a passport from one of the eligible countries and you have entered the UK on an eligible UK short-stay visa, you can travel on to Ireland without applying for an Irish visa, using the time left on your UK permission. The eligible countries are Bosnia and Herzegovina, Kosovo, Montenegro, North Macedonia, Serbia, Türkiye and Ukraine; Bahrain, Kuwait, Oman, Qatar and Saudi Arabia; China, India, Indonesia, Kazakhstan, the Philippines, Thailand, Uzbekistan and Vietnam; and Colombia and Peru. Ukrainian citizens do not need this route, because Ireland lifted visa requirements for Ukrainian nationals in February 2022. Nationals of Hong Kong and Macau are already visa-free for Ireland.
A UK ETA Is Not a UK Visa
This is the single most common way the plan falls apart. The UK has replaced visas with Electronic Travel Authorisations for a growing number of nationalities, and an ETA cannot be used for the Short Stay Visa Waiver Programme. If you hold an ETA rather than a visa, you need a separate Irish visa. The point bites hardest for nationals of Saudi Arabia, Bahrain, Kuwait, Oman, Qatar and Peru: for those six, only a valid UK short-stay visa issued before the ETA was introduced on 1 February 2024, including a multi-entry visa, can still be used to travel to Ireland.
You Have to Land in the UK First
The waiver is built around a UK entry, not a UK document. You must have landed and been granted lawful entry to the UK on your current UK visa before you travel to Ireland. Each distinct period of leave to remain in the UK, up to a maximum of 180 days at a time, needs its own prior legal entry into the UK before an Irish trip counts under the programme, however long the visa itself runs. The one relaxation is for a trip you have already started: if you entered the UK on that permission, went home, and still have time remaining on it, you can then fly directly to Ireland within that remaining time.
How Long the Waiver Lets You Stay
Your visit to Ireland must finish before your UK permission ends. The maximum is 90 days, or whatever is left of your UK permission, whichever is shorter. Immigration Service Delivery gives the arithmetic plainly: if you were granted 180 days in the UK and have used 160 of them, you can be admitted to Ireland for 20 days, not 90. If you have used 30 of the 180, you can be admitted for 90 days, not 150, because 90 is the ceiling either way. The waiver is also not reciprocal. An Irish visa gives you no right to enter the UK, and that includes Northern Ireland.
The British Irish Visa Scheme
BIVS is a separate and narrower arrangement. It covers Chinese nationals living in China, including Hong Kong and Macau, and Indian nationals living in India, in both cases at the time they apply. It allows travel around the Common Travel Area, meaning Ireland and the UK but not the Isle of Man or the Channel Islands, on a single short-stay visa. The visa has to carry the 'BIVS' endorsement to work this way. A visa officer decides case by case whether to endorse an eligible visa, and there is no appeal against a decision not to. On the UK side the scheme covers Permitted Paid Engagement visas and all standard visitor categories with a maximum single visit of six months. On the Irish side it covers Visit (family or friend), Visit (tourist), Conference or Event, and Business visas.
With BIVS, Enter the Issuing Country First
A BIVS-endorsed visa is used in a fixed order. You must travel first to the country that issued it: an Irish visa means you land in Ireland before visiting the UK, and a British visa means you land in the UK before visiting Ireland. On a single-entry BIVS visa you can then move back and forth between the two countries as much as you like within that one journey, and leave from either. On a multiple-entry Irish BIVS visa, every fresh arrival into the Common Travel Area has to be into Ireland again. As with the waiver, the ceiling in Ireland is 90 days or the end of your UK permission, whichever comes sooner, and the visa does not guarantee entry.
UK Permissions That Do Not Let You Into Ireland
- A UK Electronic Travel Authorisation, which is not a visa for these purposes
- A UK visitor in transit visa
- A UK visa issued to visit for marriage or civil partnership
- A long-term UK student visa
- A UK visa to join a spouse or for family reunification
- A UK long-stay 'D' visa or a Biometric Residence Permit, which are residence permissions rather than short-stay visas
Long-Term UK Residents Pay No Irish Visa Fee
If you are a national of one of the eligible countries but hold a long-stay UK permission rather than a short-stay visa, the waiver does not cover you and you have to apply for an Irish visa. You do not, however, have to pay for it. Ireland waives the visa fee for nationals of eligible countries who are long-term legal residents of the UK. It is an application you cannot skip, but it is a free one, so budget the processing time rather than the money.
Crossing the Northern Ireland Land Border
There are no routine immigration checks on the land border between Northern Ireland and Ireland, which leads people to assume that entering Ireland that way needs no formality. Under BIVS it does. If you arrive in Ireland across the Northern Ireland border, you have to present yourself to an immigration officer within 30 days, or within seven days if you are there for business or employment. That means the Dundalk Immigration Office, a port of entry at Dublin Airport or Dublin Port, or a local Garda Síochána immigration office. The absence of a checkpoint is not the absence of a reporting duty.
Key Takeaway
A UK visa only gets you into Ireland through one of two named schemes. If your passport is on the 22-country Short Stay Visa Waiver list and you entered the UK on a short-stay visa, you can travel on for up to 90 days or the rest of your UK permission, whichever is shorter. If you are Indian or Chinese and your visa is endorsed 'BIVS', it covers both countries, entering the issuing country first. A UK ETA, a transit visa, a student visa or a residence permit gets you nowhere, and British citizens never needed a visa in the first place.
