UK to Northern Ireland Postage: Same as Domestic—Here's Why

Sending mail from Great Britain (England, Scotland, Wales) to Northern Ireland costs exactly the same as sending it within England. No international rates, no customs forms, no extra fees.

Why It's Domestic Postage

• Northern Ireland is part of the United Kingdom (full name: United Kingdom of Great Britain and Northern Ireland).
• Royal Mail operates a single, unified postal network across the entire UK.
• Postcodes in Northern Ireland use the BT prefix (Belfast), but follow the same format and pricing as all UK postcodes.

Current Royal Mail Prices (2024)

Prices effective April 2024; check royalmail.com for latest.

What About the Republic of Ireland?

Different country. Mail to the Republic of Ireland (Dublin, Cork, Galway, etc.) is international—requires customs declaration (CN22/CN23), higher rates, and longer delivery (3–5 working days).

Post-Brexit Note

Northern Ireland remains in the UK customs territory for postal purposes. The Windsor Framework governs goods movement, but letters and standard parcels are unaffected—no customs forms for UK↔NI mail.

Quick Checklist

• ✅ Use standard UK stamps
• ✅ Address format: Name, Street, Town, County (optional), BTxx xx postcode
• ✅ No customs form needed
• ✅ Same delivery targets (1st Class: next working day)

Bottom line: Posting to Belfast, Derry, or Enniskillen is exactly like posting to Birmingham, Bristol, or Brighton.