Double Tax Treaty Networks

What a treaty network is

A country’s double tax treaty network is the set of bilateral agreements it has signed with other states. Each treaty allocates taxing rights, prevents the same income being taxed twice, and reduces withholding tax on cross-border dividends, interest and royalties.

Why size matters

The more treaties a country has, the more easily capital, profits and royalties can flow across its borders without double taxation. A broad network is a core attraction for holding companies, financing structures and internationally active investors.

Among the jurisdictions tracked on taxesmap.app, treaty counts vary widely:

• Spain — 95 treaties
• Hungary — 83 treaties
• Portugal — 78 treaties
• New Zealand — 41 treaties

Low-tax and no-income-tax jurisdictions such as the UAE, Cayman Islands and Bahamas show few or no treaties in this dataset — their appeal rests on low domestic rates rather than treaty relief.

How treaties work in practice

When income crosses a border, the source country may withhold tax. A treaty typically caps that withholding rate and lets the recipient claim relief at home through a credit or exemption. The result is that a dividend, interest payment or royalty moving between two treaty partners faces lower friction than the same payment to a non-treaty country.

For cross-border investors and treasury teams, mapping the treaty network — and the specific withholding caps within each agreement — is essential to calculating the effective rate on international payments, not just the statutory one.

Data basis: Government tax authority data via taxesmap.app, as of 2026