Do United Kingdom passport holders need a visa to visit IE?

British citizens do NOT need a visa, ETIAS, or any prior authorisation to visit Ireland. Travel is governed by the Common Travel Area (CTA), which lets British and Irish citizens move, live, work and study freely between the two countries with no time limit. Ireland is not in the Schengen Area, so the Schengen 90/180 rule and ETIAS do not apply. Carry a valid passport, as airlines and ferries generally require it as ID. A United Kingdom ordinary-passport holder enjoys visa-free, permission-free entry to Ireland under the Common Travel Area (CTA), a bilateral arrangement that predates EU membership and survives Brexit. Under Irish law, British citizens are exempt from immigration control and may enter, reside, work, study and access services without a visa, residence permit or employment permit, with no fixed limit on length of stay for a tourist or short visit. Ireland is a member of the EU but NOT of the Schengen Area; therefore the Schengen 90/180-day short-stay rule does not apply, and Ireland will not operate the EU's ETIAS travel authorisation. British citizens are explicitly exempt from ETIAS when entering Ireland because of the CTA and Ireland's non-Schengen status. There is no formal passport check guaranteed between the islands, but there is no land or sea border control waiver in practice for carriers: airlines and ferry operators routinely require a valid passport (or in some cases an accepted national ID) as proof of identity and citizenship, and an immigration officer may ask a traveller to prove British or Irish citizenship. The UK and Ireland reaffirmed the CTA in a May 2019 Memorandum of Understanding, committing to maintain it in all circumstances. Bottom line: no visa, no ETIAS, no fee, no application — just carry a passport.