Here is a breakdown of the 2026 personal income tax brackets for Tonga, shown in TOP.
| Taxable income | Rate |
|---|---|
| Over T$0 | 0% |
How brackets work
A progressive bracket system only taxes the portion of income that falls inside each band at that band's rate — not your entire income at the top rate you reach. For example, if the first T$0 of income is taxed at a lower rate, only income above that threshold is taxed at the next rate up.
Worked example: T$100,000 income
- All income falls in the 0% band.
- Total estimated tax: T$0 (0.0% effective rate)
This is the estimated tax before any deductions or credits are applied — see the deductions guide for what could lower this further. Run your own numbers with the calculator above to see exactly how much of your income falls into each bracket.
Always verify current-year brackets with Tonga's tax authority before filing.