Solomon Islands Tax Filing Guide: IRD Portal, Deadlines 2026
Solomon Islands' tax filing system is managed through the Inland Revenue Division (IRD). Individual and corporate tax returns are due by March 31 following the tax year. VAT returns are filed monthly or quarterly depending on turnover. Here is how tax filing works in 2026.
The Inland Revenue Division (IRD) operates the tax filing system in Solomon Islands. All tax returns, payments, and correspondence are handled through the IRD. Taxpayers must register for a Tax Identification Number (TIN). The system supports filing for personal income tax, corporate income tax, VAT, withholding tax, and NPF contributions. Filing is progressively moving to electronic systems. Personal tax overview →
Real-world example: A freelance consultant earning SBD 200,000 in 2025 must file their annual personal tax return by March 31, 2026. They complete the IRD tax return form, declare income and deductions, and pay any balance due via bank transfer or at the IRD office. An employee with only salary income (tax fully withheld) generally does not need to file. A company with SBD 5,000,000 turnover files CIT by March 31 and monthly VAT returns by the 20th. Residency and tax obligations →
Filing Deadlines 2026
- Individual income tax: March 31 following the tax year (e.g., 2025 return due by March 31, 2026)
- Corporate income tax: March 31 following the tax year
- VAT (monthly): By the 20th of the following month
- VAT (quarterly): By the 20th after the quarter ends
- Withholding tax: By the 15th of the following month
- NPF contributions: Monthly with payroll remittance
Taxpayers should note that if a deadline falls on a weekend or public holiday, it typically shifts to the next business day. The IRD publishes annual tax calendars at the beginning of each year.
IRD Filing System
The IRD is progressively implementing electronic filing systems. Key features include:
- Registration: Taxpayer registration and VAT registration through the IRD
- Filing: Tax return forms can be submitted in person, by mail, or through the online portal where available
- Payment: Tax payments via bank transfer, bank deposit, or at IRD offices
- Certificates: Request tax clearance certificates and certificates of residency from the IRD
The IRD is working to expand electronic services. For now, many taxpayers still file paper returns. Technical support is available through the IRD office in Honiara.
Penalties for Late Filing and Payment
- Late filing: Fines ranging from SBD 200 to SBD 5,000 depending on the type of return and delay period
- Late payment: Interest at a statutory rate on the unpaid tax amount
- Non-filing: Penalties for failure to file without reasonable cause
- Incorrect filing: Penalties for understatement of tax liability
Voluntary disclosure before an IRD audit may result in reduced penalties. The IRD may offer installment payment arrangements for taxpayers unable to pay in full.
Record Keeping Requirements
Taxpayers must maintain records for a minimum of 5 years from the end of the tax year. Required records include: accounting books and records, invoices and receipts, bank statements, contracts, payroll records, and tax returns. Records may be requested during tax audits. Failure to maintain adequate records can result in penalties and may lead to the IRD using estimated assessment methods.
Do I need a tax agent or accountant to file?
Individuals with simple tax affairs (employment income only) can file themselves. Businesses, self-employed individuals, and taxpayers with complex affairs are strongly advised to use a licensed tax accountant. Companies with turnover above certain thresholds may need audited financial statements.
What happens if I cannot pay my tax bill on time?
If you cannot pay by the deadline, you should file the return on time to avoid late filing penalties. Then contact the IRD to arrange an installment payment plan. Interest will continue to accrue on the unpaid amount.