French Guiana is considered expensive with a Cost of Living Index of 85.1 (NYC = 100). Groceries are particularly high (Index: 113.0), while restaurant prices are moderate (Index: 70.5).

The property price to income ratio is 7.3 years, indicating an affordable housing market. Rental costs are significantly lower (Rent Index: 25.1), though supply is limited and prices are elevated along the coast.

The Purchasing Power Index is 83.0, suggesting moderate buying power relative to NYC. While GNI per capita is among the highest in South America, it is significantly lower than the EU and French averages.

French Guiana follows a progressive income tax system (0-45%) with a 40% allowance up to €4,050 for residents. The standard VAT rate is 8.5%, with reduced rates for certain goods, and an additional 'octroi de mer' tax on imported goods (averaging 10-15%). Property taxes (taxe foncière) apply, and social contributions are substantial.

As an overseas department of France and part of the EU, French Guiana benefits from a stable legal framework and access to EU markets. Tax incentives, including corporate income tax exemptions for new businesses and reduced rates for SMEs, are available. However, the economy is small, public-sector dominated, and faces high unemployment (17% in 2024).

French Guiana is covered by the comprehensive French social security system, offering health insurance, pensions, unemployment benefits, and family allowances. Healthcare facilities are good in urban areas, with public insurance covering 70-80% of costs. However, access to medical care is limited in remote interior regions.

Deposits are protected up to €100,000 (approximately USD 117,000) per depositor under the EU Deposit Guarantee Scheme, as French Guiana is an overseas department of France. The banking sector benefits from the stability and oversight of the European Central Bank.