Papua New Guinea Tax Filing Guide 2026

Overview — Tax Filing in PNG

The Internal Revenue Commission (IRC) operates an online tax administration system for tax filings, payments, and compliance management. Taxpayers register on the IRC portal, obtain a Taxpayer Identification Number (TIN), and file returns electronically. The system covers income tax (personal and corporate), GST, PAYE, and withholding taxes. The IRC has been modernising its systems to improve taxpayer services, including the introduction of the Integrated Tax System (ITS) for online filing and payment.

Taxpayer Identification Number (TIN)

A TIN is mandatory for all taxpayers in PNG — individuals, companies, partnerships, and other entities. The TIN is a unique identifier. To obtain a TIN, register on the IRC portal with valid identification (passport or national ID card for individuals, incorporation certificate for companies). A TIN is required for many transactions including opening a bank account, registering a business, importing/exporting goods, and obtaining a business permit.

Filing Deadlines

Different taxpayers have different filing deadlines in PNG:

• Individuals (self-employed) — annual return by 31 October following the tax year
• Companies — annual return by 31 October following the tax year
• PAYE (employers) — monthly or fortnightly return per IRC schedule
• GST — monthly or quarterly return by the 21st of the following month/quarter
• Withholding tax — periodic return per IRC schedule
• Employees (PAYE-only) — annual return by 31 October (simplified filing)

Late filing attracts a penalty plus interest on any unpaid tax. The penalty amount depends on the taxpayer type and the period of delay.

Self-Assessment & Quarterly Instalments

Self-employed individuals and companies must estimate their annual tax liability and pay in quarterly instalments:

• First instalment — due 31 March (25% of estimated tax)
• Second instalment — due 30 June (25% of estimated tax)
• Third instalment — due 30 September (25% of estimated tax)
• Fourth instalment — due 31 December (25% of estimated tax)

If the actual tax computed in the annual return exceeds the total instalments paid, the balance is due at the time of filing. If instalments exceed the actual tax, a refund may be claimed.

Penalties & Enforcement

IRC has broad enforcement powers. Key penalties include:

• Late filing — penalty per month overdue
• Late payment — interest on unpaid tax
• Failure to maintain records — penalty
• Tax evasion — 100% penalty on evaded tax plus possible criminal prosecution
• Failure to register for tax — penalty plus back taxes

IRC may issue garnishee notices to banks and debtors to collect unpaid taxes, seize and sell assets, or initiate legal proceedings.

FAQs

Can I file my tax return manually or is it mandatory to file online?

All tax returns in PNG should be filed electronically through the IRC online portal. Manual filing may be accepted in special circumstances with IRC approval.

What records do I need to keep?

Taxpayers must keep records for at least 5 years from the end of the tax year. Records include income statements, receipts, invoices, bank statements, contracts, and asset registers.

How long does it take to get a Tax Clearance Certificate?

If all returns are filed and taxes paid, a Tax Clearance Certificate can be obtained from IRC within a few business days.

Disclaimer

This guide provides general information about tax filing in Papua New Guinea for the 2026 tax year. Tax laws, deadlines, and procedures may change. Always consult with a qualified PNG tax advisor or the Internal Revenue Commission for advice specific to your situation. InvestmentKit does not provide tax advice.