UK Tax Compliance for Irish Foundations: A Non-Resident Guide (2026)

One of the biggest concerns for Irish founders when launching a UK company is navigating a dual-tax environment. While both Ireland and the UK have straightforward tax systems, understanding the interaction between them is key to your long-term success.

Here is the essential tax and compliance roadmap for 2026.

1. Corporation Tax (19-25%)

The UK’s Corporation Tax is competitive. For small companies with profits under £50,000, the rate remains at 19%. For profits above this, a tapered system applies up to a maximum of 25%.

• Action: You must register for Corporation Tax with HMRC within 3 months of doing business.

2. VAT Thresholds (£90,000)

In 2026, the VAT registration threshold in the UK is £90,000. If your "taxable turnover" (not profit) exceeds this in a rolling 12-month period, registration is mandatory.

• Voluntary Registration: Many Irish founders choose to register for VAT early to claim back expenses and appear larger in the eyes of UK partners.

3. The Double Taxation Agreement (DTA)

Ireland and the UK have a robust Double Taxation Agreement. This ensures you don’t pay tax on the same income twice.

• Dividends: When you pay yourself a dividend from your UK LTD to your Irish personal account, you typically pay the tax in Ireland, but the UK corporate profit has already been taxed at the company level.

4. Annual Filings (Companies House & HMRC)

Regardless of your location in Ireland, your UK company has two main annual obligations:

1. Confirmation Statement: A snapshot of your company's data (directors, shareholders).
2. Annual Accounts: Financial statements submitted to both Companies House and HMRC.

5. The "ACSP" Compliance Mandate

In 2026, identity verification is no longer optional. Every director and "Person with Significant Control" (PSC) must be verified through an ACSP to remain compliant. Failure to do so can lead to daily fines and strike-off action.

Don't let tax confuse you. Our Professional Accounting team specializes in UK-Ireland business setups. Get a free consultation today.