What is withholding tax on cross-border income?

When a company pays dividends, interest or royalties to a resident of another country, the source country may withhold tax at the point of payment. A bilateral tax treaty often reduces that statutory rate so the income is not taxed heavily in both countries.

What is the difference between portfolio and direct dividend rates?

Portfolio dividends go to small shareholders and usually carry a 10-15% treaty rate. Direct (parent-subsidiary) dividends go to a company holding a large stake — often 10%, 50% or 80% depending on the treaty — and qualify for a lower rate, frequently 5% or 0%.

Why might the lowest rate not apply to me?

The reduced rate normally requires you to be the beneficial owner, a tax resident of the treaty country, and to pass a limitation-on-benefits clause that blocks treaty shopping. Some rates also need a minimum holding period. Failing any test reverts you to the statutory rate.

Are these rates current and legally binding?

They reflect the common treaty-reduced rates at the time of writing, but treaties are amended by protocols and domestic law changes. Always confirm against the live treaty text and seek professional advice before relying on a specific rate.

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UK/US Tax Treaty Reference

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Reducing double taxation on cross-border income

When dividends, interest or royalties cross a border, the source country usually levies a withholding tax. Bilateral tax treaties — built on the OECD Model Convention — cut those rates so the same income is not taxed in full twice. This reference summarises the headline withholding rates for the UK, US and major OECD partners, with the conditions that gate the lowest rates.

How it works

Each treaty sets separate reduced rates for three income types, and dividends are usually split by the size of the recipient’s holding:

Dividends (portfolio)  → small shareholder, typically 10-15%
Dividends (direct)     → parent-subsidiary holding, often 5% or 0%
Interest               → frequently 0% under modern treaties
Royalties              → often 0%, sometimes 5-10% by category

To claim a reduced rate you generally must be the beneficial owner of the income, a tax resident of the treaty partner, and pass a limitation-on-benefits clause designed to stop treaty shopping. The lowest direct-dividend rates also require a minimum ownership percentage, and sometimes a minimum holding period.

Tips and notes

A 0% direct-dividend rate usually needs a large holding — the UK/US treaty requires roughly 80% for 12 months, while the UK/France treaty needs only 10%.
Many modern treaties zero-rate interest and royalties entirely, but watch for category splits (for example, US/Canada zero-rates software royalties but taxes others at 10%).
The treaty rate is a ceiling on the source country’s tax, not a credit — relief for any remaining tax usually comes through your home country’s foreign tax credit.
Protocols amend treaties over time; always verify against the in-force text.