Tonga Investment Income Guide: Dividends 0%, Interest 15%, Royalties 10-15% 2026
Tonga applies withholding taxes on investment income: dividends at 0%, interest on bank deposits at 15% for non-residents, and royalties at 10-15%. Tonga's Double Taxation Treaties with Australia and New Zealand may reduce these rates. Here is how investment income is taxed in 2026.
The taxation of investment income in Tonga is relatively simple. Dividends paid to both residents and non-residents are not subject to withholding tax. Interest on bank accounts is subject to 15% WHT for non-residents, while residents may be subject to PIT on interest income. Royalties paid to non-residents are subject to 10-15% WHT. The TRC administers withholding tax obligations. Cross-border tax guide →
Real-world example: A Tongan company pays TOP 100,000 in dividends to a foreign shareholder. WHT at 0% = TOP 0, net payment = TOP 100,000. Interest of TOP 50,000 paid to a non-resident bank depositor: WHT 15% = TOP 7,500. Royalties of TOP 30,000 paid to a New Zealand company for software licensing: WHT 10% = TOP 3,000 (may be reduced under Tonga-NZ DTT). Corporate tax overview →
Withholding Tax Rates on Investment Income
- Dividends — residents: 0% WHT — dividends paid to Tongan residents are exempt
- Dividends — non-residents: 0% WHT — no withholding tax on outbound dividends
- Interest — residents: Subject to PIT at progressive rates (10-20%)
- Interest — non-residents: 15% WHT on bank interest — may be reduced under DTT
- Royalties — residents: Subject to PIT at progressive rates (10-20%)
- Royalties — non-residents: 10-15% WHT depending on type — may be reduced under DTT
The 0% dividend WHT is very competitive internationally and makes Tonga an attractive jurisdiction for holding companies.
Double Taxation Treaty Network
Tonga's DTT network is limited but provides benefits with key partners:
- Australia: Reduced rates on interest and royalties
- New Zealand: Reduced rates on interest and royalties
Treaty benefits require the recipient to be the beneficial owner and provide a Certificate of Tax Residency from the treaty jurisdiction.
Taxation of Other Investment Income
- Bank interest: Interest on savings accounts earned by residents is subject to PIT at progressive rates. Non-residents face 15% WHT
- Capital gains: Treated as ordinary income, taxed at PIT rates (10-20%) for individuals
Compliance and Reporting
Tongan companies paying dividends, interest, or royalties to non-residents must withhold the appropriate tax and remit it to the TRC within the prescribed timeframe. The payer must also file withholding tax returns. Recipients seeking treaty relief must provide a Certificate of Tax Residency from their home country tax authority.
Are dividends from Tongan companies really tax-free?
Yes. Dividends paid by Tongan companies to both residents and non-residents are not subject to withholding tax. This makes Tonga an excellent jurisdiction for dividend distribution.
What is the procedure for claiming treaty relief?
The non-resident recipient must submit a Treaty Relief Application to the Tongan payer, along with a Certificate of Tax Residency from their home country. The payer then applies the reduced rate at source. If tax has been over-withheld, the non-resident can file a refund claim with the TRC.