Kirk Rice Blog

Tax Issues for UK subsidiaries Financed by their Overseas Parents.Written on July 22, 2025 by Richard Somerville

Richard Somerville | Tax Partner | Kirk Rice

Key Points

• Loan finance is commonly used by overseas parents to fund UK subsidiaries, as it offers flexibility and finance costs may be tax deductible.
• Loan finance costs are not always fully deductible, as UK transfer pricing rules may restrict deductions to terms that would apply between third parties.
• The Corporate Interest Restriction rules may limit deductible finance costs based on taxable profits, although a de minimis may apply.
• Anti-hybrid rules may deny deductions where costs are also relieved elsewhere or where the lender is not taxed on the corresponding income.
• Interest paid overseas may require withholding tax, although this may be reduced or eliminated under a Double Tax Treaty.

In this article, I consider the key tax issues for UK subsidiaries of international groups face and provide guidance on how to approach them. Also examined is how UK companies are financed by their overseas parents and the tax issues and impacts that result. A mixture of share capital and loan finance typically finances companies. In the case of parent companies incorporating a new subsidiary, loan finance is often preferable to share capital on the basis that (i) it is more flexible with the amount loaned easily being altered and (ii) loan finance costs can potentially be tax deductible for the company.

On first principles, loan finance costs should be allowable for corporation tax to the extent that they are reflected in the company’s income statement. However, various anti-avoidance rules can be applied to restrict (partially or fully) the costs that can be deducted. The key rules are as follows:

Under UK Transfer Pricing rules

Loan finance costs on debt with connected parties can only be deducted to the extent that they reflect terms which third parties would impose. The full force of UK Transfer Pricing rules only applies to “large” groups, and to benefit from the Small and Medium size enterprise exemption, the group must have less than 250 full-time equivalent employees and either (i) turnover of less than €50 million or (ii) gross assets of less than €43 million. However, it should be noted that similar rules can be applied regardless of size where the UK company transacts with a company in a jurisdiction with a lower corporate tax rate than the UK. Where such rules apply, it is advisable to carry out a Transfer Pricing study to determine the appropriate level of finance costs which can be deducted for tax purposes.

Under the Corporate Interest Restriction rules

All loan finance (including unconnected debt) can be subject to a restriction where the total amounts being claimed are deemed excessive in comparison to their profit level. The calculations are complex; however, broadly speaking, the rules seek to limit finance cost deductions to 30% of the UK taxable profits before interest, taxes, capital allowances and some other tax reliefs. The rules are subject to a de minimis of £2 million; therefore, if the total loan finance costs in the UK are below this level, then the rules shouldn’t apply.

Complex “Anti-hybrid” rules

Complex “Anti-hybrid” rules are also in place, which can deny a UK company a corporation tax deduction on their finance costs where either (i) the cost has already been treated as allowable in another jurisdiction or (ii) the associated credit is not taxable on the lender in its jurisdiction of tax residence. Loan finance arrangements with overseas lenders should therefore be reviewed carefully in light of these rules.

In addition to the above, the UK tax legislation imposes a requirement to withhold income tax equal to 20% of the interest paid when such payments are made overseas. However, this amount can be reduced or eliminated when a Double Tax Treaty is in force between the two affected jurisdictions. Where tax is withheld, this must be reported and paid to HMRC quarterly on form CT61.

Kirk Rice can offer expert tax advice to UK subsidiaries financed by overseas parents

In summary, advancing loan finance to a UK subsidiary can provide a generous tax deduction in the company. However, the UK has developed over time a raft of detailed anti-avoidance legislation which can seek to restrict this benefit significantly. The onus falls on the taxpayer to review their own financing arrangements and self-assess their tax filing position. Therefore, UK companies should take appropriate tax advice early on such matters.

If you would like to discuss tax issues for UK subsidiaries financed by overseas parents please email info@kirkrice.co.uk or call (0)208 789 8588.

Please note: This article is correct as at the publication date. The answers are given for general guidance only and specific advice should be taken before acting on any of the suggestions made. The information is based on current tax legislation which may change in future. Information is based on our current understanding of taxation legislation and regulations. Any levels and bases of relief from taxation are subject to change. The Financial Conduct Authority does not regulate tax planning.