Calculate a Saint-Martin TGCA amount from a rate you have verified for the relevant activity and period. No current rate is silently assumed.
Tax = base × rate / 100. Inclusive amount = base × (1 + rate / 100). Reverse base = inclusive amount / (1 + rate / 100).
For an illustrative 4% rate on €100, the tax is €4 and the total €104. This example is arithmetic only and does not establish the applicable legal rate.
TGCA concerns the French Collectivity of Saint-Martin. It must not be confused with taxes in Dutch Sint Maarten or another Caribbean jurisdiction. Verify the category and current official rules before using a rate.
References support the identified formula, unit or jurisdiction. They do not imply endorsement of this site. Check the original document for current conditions and exceptions.
Editorial responsibility: Nicolas Belotti · Methods and testing · Report an error
English edition: 16 September 2026.