Brunei Tax Filing Guide 2026

Overview — Tax Filing in Brunei

Brunei's tax administration is minimal because the tax base is limited. The Ministry of Finance and Economy (through its Revenue Division, soon to become the Inland Revenue Authority of Brunei Darussalam) administers corporate income tax. There is no personal income tax system, no VAT/GST system, no PAYE system, and no withholding tax system. The only regular tax filings required are from companies subject to CIT. Individuals have no tax registration, no filing obligations, and no interaction with the tax authority. This makes Brunei one of the simplest jurisdictions for tax compliance in the world.

Corporate Tax Filing

Companies subject to CIT must file an annual corporate tax return within 3 months of the end of their accounting period. The process involves:

• Filing Form C (Corporate Tax Return) with the tax authority
• Attaching audited financial statements (unless exempt)
• Attaching a tax computation showing adjustments between accounting profit and taxable income
• Paying any tax due at the time of filing (based on the assessment issued)

Extensions of time to file may be granted on application, typically for up to 6 months. The tax authority reviews the return and issues an assessment. There is no self-assessment regime — the taxpayer does not self-assess the tax. The assessment issued by the tax authority is the final tax liability unless appealed. Appeals must be lodged within 30 days of the assessment date.

No Individual Filing

Individuals in Brunei have no tax filing obligations whatsoever. The absence of personal income tax means there is no requirement to:

• Register for a tax identification number (TIN)
• File an annual personal tax return
• Declare employment income, rental income, investment income, or capital gains
• Report foreign income or assets
• Pay estimated quarterly taxes

This applies to all individuals regardless of their income level, source of income, or residency status. The only document that could be considered a tax-related filing for individuals is the TAP contribution report submitted by employers (not a tax filing, but a provident fund contribution report).

Penalties & Enforcement

For companies that fail to comply with tax filing obligations, the following penalties apply:

• Late filing — penalty of up to BND 300 per month of delay
• Late payment — 5% penalty on the tax assessed, plus interest
• Non-filing — the tax authority may issue a best judgment assessment, which may be higher than the actual tax liability
• False returns — penalties of up to 100% of the tax undercharged

The tax authority has powers to request documents, conduct audits, and recover unpaid tax through legal proceedings. However, enforcement actions are relatively rare given the small number of corporate taxpayers. Companies should maintain proper accounting records and file returns on time to avoid penalties.

Record-Keeping Requirements

Companies in Brunei must maintain proper accounting records for at least 7 years after the end of the financial year. Records must include:

• Books of account (general ledger, cash book, sales and purchase ledgers)
• Invoices, receipts, and vouchers
• Bank statements and cheque books
• Contracts and agreements
• Asset registers and depreciation schedules
• Statutory registers (directors, shareholders, charges)

Individuals have no record-keeping requirements for tax purposes. However, individuals with financial interests outside Brunei should maintain records for compliance with their home country's tax laws (e.g., FATCA, CRS reporting).

FAQs

Do I need to register for a TIN in Brunei?

Individuals do not need a Taxpayer Identification Number. Companies receive a tax reference number upon incorporation or registration with the tax authority.

How long does the corporate tax filing process take?

The filing itself is straightforward and can be completed within a few hours for a simple company. The tax authority typically processes the return and issues an assessment within 3–6 months.

What if I don't file a corporate tax return?

Failure to file can result in penalties and a best judgment assessment. The tax authority may also restrict the company's ability to obtain certificates and approvals.

Disclaimer

This guide provides general information about Bruneian tax filing for the 2026 tax year. Tax laws, deadlines, and procedures may change. Always consult with a qualified tax advisor or the Brunei Ministry of Finance and Economy for advice specific to your situation. InvestmentKit does not provide tax advice.