Using UK Stamps to Mail to Ireland: Yes, But With Caveats

Yes, UK stamps (Royal Mail) work for mail to the Republic of Ireland—but the pricing and logic are specific.

Why It Works

Universal Postal Union (UPU) treaties obligate member states (UK and Ireland both members) to accept each other's postage. Common Travel Area history and Royal Mail's "International Standard" tariff treat Ireland as a distinct Europe zone—not "domestic," not "rest of world."

Current Rates (2024)

• Letter (≤100g): £2.20 (International Standard)
• Large Letter (≤100g): £3.20
• Parcels: Weight/dimension based, £10+

Forever stamps (1st/2nd class) cover domestic UK only. You need additional postage or international stamps for Ireland.

Practical Tips

• Use "AIR MAIL" / "PAR AVION" label or write it.
• Include return address (UK).
• Eircode (Irish postcode) speeds delivery.
• For valuable/trackable: International Tracked & Signed (£7.85+).

Northern Ireland (UK): domestic rates apply. Republic of Ireland: international rates. Same island, two postal administrations.