The Cook Islands, a self-governing territory in free association with New Zealand, taxes resident companies on worldwide income at 20% and non-resident domestic companies only on Cook Islands-source business profits at 28%. International Companies (offshore entities not conducting local business) lost their blanket statutory tax exemption under a 2019 amendment, phased in for existing companies from January 1, 2022, though offshore entities earning no Cook Islands-source income remain effectively untaxed in practice.
The tax year is the calendar year (January 1 to December 31). Individuals and companies must file annual tax returns by April 30 of the following year; offshore entities such as International Business Companies are not required to file returns if they conduct no business within the Cook Islands.
20% standard rate for resident domestic companies (worldwide income); 28% for non-resident domestic companies, taxed only on Cook Islands-source business profits. International Companies (offshore entities not conducting local business) lost their statutory tax exemption under a 2019 amendment, phased in for existing companies from January 1, 2022.
Progressive: exempt up to NZD 10,000 (full-year residents only, apportioned for partial-year residents), 25% from NZD 10,001 to 30,000, and 30% above NZD 30,000. Non-residents face a different bracket structure starting at 20% with no exemption.
15% standard rate. Applies to goods and services supplied in the Cook Islands and to imported goods and certain imported services; registration threshold is NZD 40,000 for non-resident digital service providers.
Individual residency is generally triggered by physical presence exceeding 183 days in a calendar year (OECD-reported test). A company is deemed Cook Islands tax resident if incorporated there, or if its directors, acting as directors, exercise control of the company within the Cook Islands - even if some of that decision-making also occurs elsewhere. Resident companies are taxed on worldwide income; non-residents only on Cook Islands-source income.
A company is deemed Cook Islands tax resident, and taxed on worldwide income at 20%, if it is incorporated in the Cook Islands, has three or more directors resident in the Cook Islands at any point in the income year, or has its place of effective management or director control exercised within the Cook Islands. A company that is not tax resident is instead taxed at 28% only on income arising from a Cook Islands source, which functions as the jurisdiction's practical permanent establishment threshold for non-resident business activity.
The Cook Islands has no domestic CFC regime of its own.
No dedicated statutory thin capitalization ratio was identified in available sources for the Cook Islands. This is flagged as a genuine gap after a real search effort, not a confirmed absence of any interest-deductibility limit.
The Cook Islands classifies entities by their domestic legal form rather than offering an elective check-the-box system, and no CFC or ATAD2-style anti-hybrid mismatch regime has been identified; the jurisdiction has no statutory CFC rules at all, which facilitates the use of Cook Islands International Companies and LLCs as pass-through or disregarded entities under a foreign owner's own home-country classification election, a choice made under the foreign owner's law rather than the Cook Islands'.
No domestic FBAR-equivalent regime requires Cook Islands residents to separately disclose foreign financial accounts. The Cook Islands participates in the Common Reporting Standard for automatic exchange of financial account information, notwithstanding its otherwise narrow treaty network. US persons remain independently subject to FinCEN Form 114 (FBAR) and potentially Form 8938 regardless of the Cook Islands' own rules.
No participation exemption regime exists for dividends or capital gains from a qualifying subsidiary. This reflects the Cook Islands' broader absence of a capital gains tax and its narrow domestic-income-focused tax base rather than a dedicated participation exemption mechanism.
No dedicated unilateral foreign tax credit provision is identified. Given the Cook Islands' very limited treaty network (see Treaty Network below - a narrow allocation-of-taxing-rights agreement with New Zealand, plus information-exchange-only TIEAs elsewhere), relief from double taxation for Cook Islands residents with foreign-source income is likely to depend primarily on that New Zealand agreement rather than a broader domestic FTC mechanism; confirm directly with Cook Islands Revenue Management.
The Cook Islands has no comprehensive double tax agreement network in the conventional sense. It has, however, concluded a narrow Agreement for the Allocation of Taxing Rights with New Zealand, covering only specific categories of individual income (retirees, government employees, and students), plus standalone Tax Information Exchange Agreements with Australia (2009), New Zealand (2009), the Netherlands, and Canada (2015). These TIEAs facilitate information exchange on request rather than providing the withholding-rate reductions of a full DTA.