Tax audits in St. Barths: time limits, penalties and remedies

In St. Barths, the tax authorities can audit and reassess until the end of the third year following the year of the taxable event. Paying late costs interest of 0.75% per month, compounded, plus penalties of 10% to 80% depending on how serious the failure is. In return, taxpayers have specific safeguards and avenues of appeal.

Who audits taxes in St. Barths?

Audits are conducted by the tax administration of the Collectivité, the island’s local government, or by the French State’s administration acting under an agreement: the Guadeloupe regional public finance directorate and its St. Barths office. A request for information must be answered within thirty days. Notaries, bailiffs and court clerks make their registers available.

For French taxes, French procedural rules apply. The local taxes concerned are covered in our overview of taxes and duties in St. Barths.

Tax reassessment in St. Barths: a three-year window

The period is counted in calendar years, starting from the year of the taxable event: a sale completed in 2026, whether in January or in December, can be reassessed until December 31, 2029.

The main time limits to know:

Step	Time limit
Answering a request for information	30 days
Voluntarily correcting an omission	2 months
Reassessment by the tax authorities	End of the 3rd following year
Advance consultation left unanswered	6 months
Request for penalty relief left unanswered	2 months (refusal)

Tax audits: taxpayer safeguards

• Burden of proof. It is for the tax authorities to prove that a value has been understated.
• Right to an adviser. The proposed reassessment must state that the taxpayer may be assisted by an adviser.
• Conciliation commission. It steps in when there is a disagreement over the prices or valuations used as the base for registration duties. Chaired by a judge of the Basse-Terre court of appeal, it brings together the director of tax services for Guadeloupe, elected officials, a notary and taxpayer representatives.
• Advance consultation. For registration duties and land registration, a written request to the executive council before the deed is signed, with all the facts, protects against recharacterization if it goes unanswered for six months.

The authorities may indeed restore a deed to its true nature and disregard clauses that conceal its real scope in order to reduce the duties owed.

What late interest and penalties apply in St. Barths?

Situation	Charge
Any delay	Interest of 0.75% per month, compounded
Late payment	10% penalty
Deliberate non-compliance	40% penalty
Fraudulent conduct	80% penalty
Concealment of price	50% penalty
Unpaid business contribution, vehicle taxes, port or airport taxes	80% penalty
Electricity tax not billed, obstruction of an audit	80% penalty

Interest runs from the first day of the month after the tax fell due to the last day of the month of payment. It is not owed if the shortfall does not exceed 5% of the tax base, or where the deed contains an express statement setting out the reasons for the treatment adopted. The penalty for concealing part of a price is owed jointly and severally by all parties. Tax fraud also carries criminal penalties, by reference to French criminal law.

Example: an unpaid CFAE and an overdue €10,000 duty

The amounts below are assumptions, chosen for illustration only.

Camille runs a services company with two employees. She lets the March 31 deadline pass without paying the flat annual business contribution.

Step	Amount
Fixed portion	€350
Two employees at €100 each	€200
Contribution due	€550
80% penalty	€440
Total, before late interest	€990

The calculation: €350 + €200 = €550, then €550 × 80% = €440. One missed deadline takes the amount owed from €550 to €990, plus late-payment interest.

Hugo failed to pay a €10,000 duty when it fell due. The penalty depends on how the tax authorities characterize the failure.

Situation	Rate	Penalty
Late payment	10%	€1,000
Deliberate non-compliance	40%	€4,000
Fraudulent conduct	80%	€8,000

Late-payment interest comes on top: 0.75% of €10,000, or €75 for the first month, with interest then compounding until payment. If Hugo comes forward voluntarily within two months, the 40% penalty is avoided.

Voluntary correction, claims, penalty relief: the remedies

• Voluntary correction. Made within two months, it avoids the 40% penalty.
• Claims. They follow, by cross-reference, the rules of the French Tax Procedure Code. Payment is suspended as of right, provided security is given.
• Discretionary relief. It never covers the tax itself, only penalties. It is granted by a reasoned decision of the executive council, provided the principal has already been paid. The request is made in writing to the President of the Collectivité and does not suspend payment. Two months of silence amounts to a refusal, which can be challenged in court.

A request for penalty relief is made by ordinary letter, identifying the taxpayer and the tax concerned. It is assessed case by case, based on the taxpayer’s situation (an unforeseeable loss of income, exceptional circumstances, abnormally high expenses) and on their usual record of filing and paying on time.

If the tax remains unpaid, a collection notice is issued, followed by a formal demand by registered mail. Enforcement can begin at twenty days, with collection costs of 1% to 5%. The Collectivité’s tools include third-party garnishment and a statutory mortgage. Cash payments are capped at €3,000.

Do St. Barths banks share account information?

The Collectivité exchanges information with French tax administrations and with countries that have a treaty with France. It also applies the Common Reporting Standard, the automatic exchange of financial account information:

• banks and insurers on the island identify the tax residence of every account holder, through a self-certification at account opening;
• for passive non-financial entities, they also identify the individuals who control them;
• they file an annual report with the French tax administration before July 31.

The information is then exchanged with European Union member states and partner jurisdictions, with the exception of France, which is treated as the same country.

Tax audits: common mistakes

• Letting the thirty-day deadline pass without answering a request for information.
• Failing to register a transfer of shares, even between family members: a minimum duty of €125, late interest and a penalty.
• Paying the flat annual business contribution after March 31: the penalty is 80%.
• Asking for relief on the tax itself, or asking before the principal has been paid.
• Assuming an account opened on the island falls outside automatic exchange of information.

Tax audits in St. Barths: the bottom line

Tax audits in St. Barths follow clear rules. The tax authorities can reassess until the end of the third year following the year of the taxable event: a sale completed in 2026 can be reassessed until December 31, 2029. Any delay costs interest of 0.75% per month, compounded, and penalties range from 10% for late payment to 40% for deliberate non-compliance and 80% for fraudulent conduct. A voluntary correction made within two months avoids the 40% penalty. Discretionary relief never covers the tax itself, only penalties, and only once the principal has been paid. These rules apply to everyday taxes, such as the tourist tax, as much as to buying property. A reassessment or a voluntary correction is best handled with an adviser.

A note for U.S. readers: this article covers French and St. Barths rules only. U.S. citizens and green card holders remain subject to U.S. tax on their worldwide income wherever they live.