Key Takeaways
- Business profits tax applies in Nauru to both resident and non-resident companies that conduct business there, including foreign-owned firms operating through a permanent establishment.
- Companies fall into different categories taxed at 20% or 25%, with the tax base built from taxable income subject to defined thresholds and available deductions and loss relief.
- Filing duties include a defined tax year, quarterly instalments, annual returns, and set payment deadlines, with penalties applying where obligations are not met.
- Sector-specific charges cover mining and international transportation, while the outlook reflects incentives and the OECD Pillar Two global minimum tax.
Corporate Tax in Nauru: Business Profits Tax Under the Business Tax Act 2016
Nauru does not levy a conventional corporate income tax. In its place, a Business Tax applies to entities operating within the country, with Business Profits Tax (BPT) serving as the main charge on company income under the Business Tax Act 2016. The framework took effect on 1 July 2016 and is administered by the Nauru Revenue Office, which publishes the governing rules and rates at naurufinance.info.
This regime reaches any person conducting business in the country, whether locally resident or operating through a presence from abroad. The article that follows explains how BPT is structured, what rates and thresholds apply, how taxable income is computed, and the filing and payment duties a foreign-owned company should expect.
It is written for non-resident investors, owners, and their advisers weighing whether to set up or maintain a business presence here.
Legal Basis: The Business Tax Act 2016 and the Business Tax (Rates of Tax) Regulations
The principal statute is the Business Tax Act 2016 (Act No. 31 of 2016), which has applied since 1 July 2016. It was amended later that year by the Business Tax (Amendment) No. 2 Act 2016 (Act No. 49 of 2016).
Three distinct charges sit under this Act: Small Business Tax, Business Profits Tax, and Non-Resident Tax. BPT is the levy that most resembles a corporate tax and is the focus here.
Subsidiary rules fill in the detail. The Business Tax Regulations 2016, made by Cabinet under section 46 of the Act, commenced alongside the primary legislation, and a further amending set of Regulations took effect on 1 July 2018.
Administration draws on a separate framework, the Revenue Administration Act 2014, under which the Secretary of Finance may issue public rulings to keep interpretation consistent. The published rate schedules are issued separately and maintained by the revenue authority rather than fixed in the body of the Act.
Because the rate schedule is set out in subsidiary Regulations rather than the Act itself, confirm the figures against the current schedule before relying on them.
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Which Companies Are Liable: Resident and Non-Resident Companies Conducting Business in Nauru
BPT falls on the taxable income of any person who conducts business in the country, and the rate that applies turns on entity type, residency status, and turnover. The definition of "person" is broad, covering individuals, partnerships, trusts, companies, and other bodies of persons, as well as the Government, a local authority, a foreign government, or an international organisation.
Both resident companies and self-employed individuals carrying on business must register with the Nauru Revenue Office. Registration is the entry point to the system, regardless of where ownership sits.
For a non-resident, liability hinges on whether business is carried on through a permanent establishment, defined as a place of business through which a non-resident's business is conducted. Building sites and connected project activities run by an associate are aggregated when testing whether the ninety-day threshold for a permanent establishment is crossed.
An agent acting on behalf of a principal can itself constitute a permanent establishment of that principal. Company residency is settled under the Act and is treated in a separate, dedicated article.
Business Profits Tax Rates and Company Categories (20% and 25%)
The rate that applies to a company is fixed by first placing the business in the correct company category. The Act sets out four such categories, and the applicable rate is read from the published schedule.
The headline company rate is 25%, recorded as Nauru's corporate income tax rate by both the Tax Foundation and Bloomberg Tax. The higher company rate engages once annual turnover reaches AUD $15 million for resident companies.
Different rates apply to other entity forms. Individuals are charged BPT at 20%, and partnerships and trusts are likewise taxed at 20%.
| Taxpayer | Rate |
|---|---|
| Companies (top rate) | 25% |
| Individuals | 20% |
| Partnerships and trusts | 20% |
The full breakdown of all four company categories, including the exact turnover bands that separate the 20% and 25% tiers, sits in the Business Tax (Rates of Tax) Regulations. Retrieve the current schedule from the revenue authority before fixing your expected liability, as the category structure carries more detail than a single headline figure conveys.
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The Tax Base: Computing a Company's Taxable Income and the $250,000 / $15 Million Thresholds
BPT is charged on taxable income, a net figure of income less allowable deductions, rather than on gross receipts. Only Small Business Tax works on a gross basis.
Two thresholds shape the result. The company rate scale begins to bite at AUD $15 million in turnover for resident companies, while resident individuals enjoy a tax-free threshold of AUD $250,000, with BPT applying to income above that level.
Currency translation is mechanical but worth planning for. All amounts are expressed in Australian dollars, and any figure in another currency must be converted at the Reserve Bank of Australia exchange rate applying on the date the amount is taken into account.
Special separation rules apply to insurers. A company carrying on life insurance alongside other business, including general insurance, must compute the taxable income from its life insurance business apart from the rest.
The detailed computation formula, with deductions defined under section 19 of the Act, follows a standard gross-income-less-deductions logic. Verify the specific deduction provisions in the consolidated text before finalising a return.
Allowable Deductions and Loss Relief for Companies
Total deductions for a tax year are the sum of the items the Act permits. A loss on disposal of a business asset is recognised as the amount by which the asset's net book value exceeds the disposal proceeds.
One timing rule deserves attention from any business making cross-border payments. A deduction for a payment that is subject to withholding tax is denied until the tax year in which that withholding tax has actually been paid to the Secretary, so cash-flow and remittance discipline directly affect deductibility.
General insurers receive a defined concession: a deduction is allowed for the reserve for unexpired risks at year-end, provided the reserve is calculated under International Financial Reporting Standards. Mining-related expenditure is governed by rules the Regulations may prescribe.
Record-keeping underpins all of this. A person with a net loss must keep accounts, documents, and records sufficient to evidence the loss, and entities must retain accurate financial records for at least five years.
- The loss carry-forward or carry-back period is not stated in the sources reviewed; confirm the available relief period in the Act text or the revenue authority's Q&A guide before relying on prior-year losses.
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The Tax Year, Filing Obligations, and Quarterly Instalments
The standard tax year for BPT runs for twelve months ending on 30 June. A company may, with the Secretary's approval, align its tax year with its financial accounting period where its annual balance date differs, such as 31 March.
Although BPT is assessed annually, payment is staged across the year. Instalments fall due quarterly, each quarter being a period of three months.
The instalment dates noted in the revenue authority's guidance are 31 December, 31 March, and 30 June, with the first-quarter date implied as 30 September within the 30 June cycle. A company liable for BPT must lodge an annual return, generally within 90 days after the fiscal year-end.
Payment Deadlines, Annual Returns, and Penalties for Non-Compliance
For a 30 June year-end, the annual BPT return is generally due within 90 days, that is by 28 or 29 September. Registered businesses and self-employed individuals also meet monthly remittance duties, paying to the revenue authority on the 15th of each month.
Withholding obligations carry their own calendar. A person required to withhold Non-Resident Tax must pay the withheld amount to the Secretary within 15 days after the end of the month in which the income was paid.
Failure to withhold, or withholding without remitting, makes the payer personally liable for the amount. Penalties apply where a remittance is missed or late, and penalty administration is governed by the Revenue Administration Act 2014.
Shipping has a bespoke timetable. For international transportation business tax on a ship, the return may be filed and the tax paid within 30 days after the ship departs, provided the non-resident owner or charterer has made satisfactory payment arrangements.
A person who fails to withhold tax, or who withholds but does not pay it across, becomes personally liable for the sum; build remittance deadlines into your payment controls.
Treatment of Foreign-Owned Companies and Permanent Establishments
For a non-resident, the permanent establishment test under section 7 of the Act decides whether business profits are taxable. A permanent establishment is a place of business through which a non-resident carries on business, and where an agent acts for a principal, the agent can amount to a permanent establishment of that principal.
The ninety-day threshold for building sites and project work is applied on an aggregated basis, pulling in connected activities carried on by an associate. Structuring a short project to stay below the line therefore requires care, since associated work counts toward the same clock.
Beyond BPT, two charges affect cross-border arrangements. Non-Resident Tax is imposed at 20% on a non-resident deriving Nauru-source interest, royalties, or insurance premiums, while a non-resident individual conducting business solely in the country with gross revenue at or below AUD $250,000 is taxed under Small Business Tax at 2.5% on gross revenue rather than BPT.
Treaty relief is not available. The country has concluded no double tax treaties, though it has signed the OECD Multilateral Convention on Mutual Administrative Assistance in Tax Matters, which supports information exchange between authorities.
Sector-Specific Charges Within Corporate Tax Scope: Mining Operations and International Transportation Business Tax
Certain industries face charges that sit alongside, or interact with, the general business tax rules. Phosphate mining is subject to royalties and special levies, and the Government has historically drawn on phosphate revenue and trust investment income rather than broad business taxation. The Regulations may set rules for the deduction of mining-related expenditure.
International Transportation Business Tax targets non-resident owners and charterers of ships. The Secretary may permit the return to be filed and tax paid within 30 days of the ship's departure where satisfactory payment arrangements exist.
Aircraft are handled through a clearance lock. The Civil Aviation Authority of Nauru must not grant departure clearance until any outstanding international transportation business tax has been paid or secured.
A separate charge, the Telecommunications Service Tax under the Telecommunications Service Tax Act 2009, applies to service providers at 10% on gross sales of telecommunication services. The precise rate and base for International Transportation Business Tax are set in Schedule 1 of the Act and should be confirmed there before assessing exposure.
Incentives and the Outlook for Business Profits Tax (Including the OECD Pillar Two Global Minimum Tax)
The Business Tax regime was introduced to broaden a revenue base that had leaned on phosphate royalties, fishing licence fees, and foreign aid. Formal investment incentive legislation or company tax holidays were not identified in the sources reviewed.
The principal structural concession is the tax-free threshold available to resident individuals, partnerships, and trusts composed only of Nauruan residents. This is a relief for resident taxpayers rather than a targeted incentive for inbound investment.
International developments may still matter for large groups. The OECD's Pillar Two framework sets a global minimum effective tax rate of 15% for multinational enterprises with consolidated revenue above EUR 750 million.
No public evidence indicates that domestic Pillar Two rules (a qualified domestic minimum top-up tax or income inclusion rule) have been enacted locally. Under the GloBE common approach, a jurisdiction is not obliged to adopt the rules, but a parent entity's home country may still apply a top-up where group profits booked in the country are taxed below 15%.
On their face, the 20% to 25% BPT rates sit above the 15% floor. Low-income positions, such as those benefiting from the AUD $250,000 threshold, could nonetheless produce an effective rate below 15%, which is a review point for any in-scope multinational group.
Conclusion
Foreign ownership does not shield a company from Nauru's business profits tax, and the permanent establishment rules mean that even a light operational footprint on the island can be enough to trigger full filing and payment obligations. For a non-resident owner weighing incorporation or continued activity there, the practical question is not whether tax applies but whether the applicable rate, the quarterly instalment rhythm, and the sector-specific charges fit the projected returns from Nauruan operations. Before committing to a structure, confirm with a qualified adviser how your company category is classified under the rate schedule, because that single determination sets the ceiling on your after-tax position.
How Expanship Can Help Your Business in Nauru
Expanship supports foreign-owned entities with Business Profits Tax registration, return preparation, and instalment management, and extends that support to the full set of tasks involved in running a compliant company in the country. We work from the non-resident owner's perspective, coordinating local requirements so you can direct the business from abroad.
- Company formation and structuring for foreign owners
- Registered agent and local office services
- Tax registration and BPT return filing
- Ongoing compliance and deadline management
- Accounting and bookkeeping aligned to local record-keeping rules
- Banking introductions
To discuss your situation and the next steps, contact Expanship Nauru.
Frequently Asked Questions
There is no conventional corporate income tax. Companies are instead taxed through Business Profits Tax under the Business Tax Act 2016, which applies to the taxable income of a person conducting business in the country.
The top company rate is 25%, reached once annual turnover hits AUD $15 million for resident companies. Individuals, partnerships, and trusts are taxed at 20%, and companies are placed within one of four categories under the published rate schedule.
For the standard tax year ending 30 June, the BPT return is generally due within 90 days of year-end, which falls around 28 or 29 September. A company may instead align its tax year with its accounting period, such as 31 March, with the Secretary's approval.
A non-resident is taxable on business profits where it operates through a permanent establishment, including through a dependent agent. Separately, Non-Resident Tax of 20% applies to Nauru-source interest, royalties, and insurance premiums, and there are no double tax treaties to reduce these charges.
A net loss must be supported by accounts and records sufficient to evidence the amount, and entities must keep financial records for at least five years. The specific carry-forward or carry-back period is not set out in the sources reviewed and should be confirmed in the Act text or the revenue authority's guidance.
No domestic Pillar Two legislation has been identified. A multinational group with consolidated revenue above EUR 750 million could still face a top-up tax in a parent jurisdiction if its effective rate in the country falls below 15%, which is worth reviewing where the AUD $250,000 threshold lowers the effective rate.
Legal Disclaimer
The information provided in this article is for general informational purposes only and does not constitute legal, tax, or professional advice. While we strive to ensure the accuracy and timeliness of the content, laws and regulations are subject to change, and the application of laws can vary widely based on specific facts and circumstances.
Readers should not act upon this information without seeking professional counsel tailored to their individual situation. Expanship and its authors disclaim any liability for actions taken or not taken based on the content of this article.
For specific advice regarding your business setup, compliance requirements, or any legal matters, please consult with qualified legal and tax professionals in the relevant jurisdiction.
