The UK Double Taxation Treaty Passport Scheme (DTTP): A simpler route to reduced withholding tax

Are you lending funds from outside the UK to a UK resident company? You may want to consider DTTP.

If an overseas lender receives interest from a UK borrower, the UK may require income tax to be withheld at 20%. For international groups, private lenders, funds and treasury companies, this can significantly affect cash flow and financing costs if not managed properly. The UK’s Double Taxation Treaty Passport Scheme (DTTP) was introduced to help simplify the process of reducing the withholding tax rates in line with the applicable tax treaties.

However, it is often misunderstood, and careful compliance remains essential.

What is the DTTP?

DTTP is an HMRC administrative scheme that simplifies access to treaty relief for eligible overseas lenders making multiple loans into the UK. Typically:

• the overseas lender applies to HMRC for a DTTP passport;
• HMRC issues a DTTP passport number if the lender qualifies;
• the passport can then be used for multiple UK loan arrangements during its validity period;
• the UK borrower notifies HMRC of each qualifying loan; and
• HMRC issues a direction authorising interest to be paid at the applicable treaty rate.

The actual reduction in withholding tax still depends on the relevant tax treaty and whether the lender qualifies for treaty benefits.

DTTP does not automatically eliminate withholding tax

Importantly, the passport itself does not automatically eliminate UK withholding tax. Until HMRC issues its direction for the loan, the borrower will generally need to continue withholding tax on interest payments at the domestic rate. This timing issue is commercially significant. If interest payments are made before HMRC approval is received, the borrower may need to deduct tax even where treaty relief should ultimately apply. For this reason, many cross-border finance agreements include:

• withholding tax gross-up clauses
• lender notification obligations
• indemnities for treaty failure
• cooperation provisions relating to DTTP filings

Well drafted documentation is often just as important as the tax analysis itself.

 Who can use DTTP?

DTTP is primarily available to overseas corporate lenders that:

• are resident in a country with a UK double tax treaty;
• qualify for treaty benefits; and
• are the beneficial owner of the interest.

The beneficial ownership requirement is particularly important in international treasury and group financing structures.

Structures lacking genuine commercial substance may not qualify for treaty relief.

 Why beneficial ownership matters

Treaty relief is only available where the overseas lender is the beneficial owner of the interest.

While it is common for multinational groups to centralise financing through treasury companies, those entities must have genuine commercial substance, real decision-making authority, economic ownership of the interest income and a commercial purpose beyond securing tax benefits.

Arrangements that simply pass interest through to another entity may not qualify for treaty relief, making beneficial ownership one of the key considerations in cross-border financing.

Why use the DTTP scheme?

Since the repeal of the UK’s implementation of the EU Interest and Royalties Directive in 2021, treaty relief has become increasingly important for cross-border financing. As a result, many cross-border interest flows that previously relied on EU exemptions now depend primarily on treaty-based relief mechanisms such as DTTP.

For international groups lending into the UK, withholding tax management is therefore now a much more significant part of financing structuring. For businesses making regular loans into the UK, DTTP can reduce administration by avoiding separate treaty clearance applications for every transaction. DTTP is often preferable where:

• lenders expect to make multiple UK loans
• treasury operations are centralised
• repeat financing arrangements are anticipated
• groups want a more streamlined administrative process

A single passport can usually support multiple transactions over its validity period.

Before DTTP existed, overseas lenders typically relied on standalone treaty-clearance applications for each loan. That process still exists and may still be appropriate in some situations where:

• confidentiality is important
• lending arrangements are highly bespoke
• lenders prefer not to participate in the passport regime

Choosing the right approach depends on the lender’s wider financing strategy and operational priorities.

Don’t overlook compliance

DTTP is not a one-off exercise. Businesses should monitor:

• changes to loan terms;
• transfers or novations;
• changes in lender identity, residence or treaty eligibility; and
• passport validity.

Failure to notify relevant changes can result in withholding tax becoming payable, together with interest and potential penalties.

 Practical steps for using DTTP

A typical DTTP process will usually involve:

1. Confirming the lender’s treaty eligibility and beneficial ownership position
2. Applying to HMRC for DTTP passport status
3. Including appropriate DTTP clauses in finance documents
4. Providing passport details to the UK borrower for each loan
5. Filing the required borrower notifications with HMRC
6. Waiting for HMRC’s direction before making gross or reduced-rate payments
7. Monitoring ongoing compliance and changes throughout the loan term

Early planning is important because delays in HMRC processing can affect payment timing and withholding obligations.

 Final thoughts

The DTTP Scheme is a valuable administrative tool for international lending into the UK.For groups making repeated cross-border loans, it can significantly simplify treaty-clearance procedures and reduce administrative friction.

However, DTTP does not replace the underlying withholding tax rules. Treaty entitlement, beneficial ownership and ongoing compliance remain central to the analysis. Businesses using cross-border financing structures should ensure that:

• treaty eligibility is robust
• loan documentation is carefully drafted
• operational compliance procedures are maintained
• treasury structures have genuine commercial substance

With proper planning, DTTP can be an effective part of an international financing strategy, but it works best when combined with disciplined tax governance and well-structured financing arrangements.

For more information, or to speak with one of our International Tax experts, call today on 01905 777600 or email hello@ormerodrutter.co.uk.

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The information in this post is accurate as of its publication date and may become outdated over time. This content is provided for general informational purposes only and should not be considered technical advice. If you have any questions or need guidance specific to your situation, please get in touch with our team.