Corporate Tax in Mauritius — Rates, Deadlines, and How to File

If you run a company in Mauritius, corporate tax is one of your largest annual obligations. The good news is that the system is straightforward — once you understand the rates, deadlines, and what you can deduct.

The 15% Corporate Tax Rate

Mauritius applies a flat 15% corporate tax rate on the net taxable income of all companies, whether locally incorporated or foreign companies operating through a permanent establishment (source: MRA).

This rate applies after allowable deductions have been subtracted from your gross income. There are no graduated brackets for corporate tax — it is 15% on the bottom line.

Allowable Deductions

To calculate your net taxable income, you can deduct ordinary and necessary business expenses from your revenue. For full details, see the MRA. Common deductions include:

Operating expenses — rent, utilities, salaries, and day-to-day business costs.
Depreciation — capital allowances on qualifying assets such as equipment, vehicles, and furniture.
Interest expense — interest on borrowings used for business purposes.
Professional fees — accounting, legal, and consulting fees related to the business.
Bad debts — amounts written off as irrecoverable that were previously included as income.
Donations — donations to approved charitable organisations are deductible up to a limit.

Expenses must be wholly and exclusively incurred in the production of income. Personal expenses, fines, and penalties are not deductible.

Filing Deadlines

The corporate tax filing cycle follows these key dates:

Year-end:Your company's financial year-end determines the basis period for the tax return.
Tax return (Form C): must be filed within 6 months of the year-end. For companies with a 31 December year-end, the deadline is 30 June of the following year (source: MRA).
Provisional tax: companies with a tax liability exceeding Rs 100,000 must pay provisional tax in two instalments (60% by 31 December, 40% by 30 June).
Final payment: any balance of tax must be paid with the filing of the return.

How to File

Corporate tax returns are filed electronically through the MRA e-Services portal. You will need:

Your company's BRN and TAN (Tax Account Number).
Audited financial statements for the relevant year.
Supporting schedules for deductions claimed.
Details of any capital allowances claimed.

Many companies engage their accountant to prepare and file the return. If you are filing yourself, the MRA portal guides you through each section — but accuracy is essential. Errors can trigger an audit.

Penalties for Late Filing

The MRA imposes a 20% surcharge on the tax due for returns filed after the deadline. Interest also accrues on any unpaid tax from the original due date. In serious cases of non-compliance, the MRA may prosecute — which can result in additional fines or imprisonment.

The Role of Invoicing in Tax Compliance

Accurate invoicing is the foundation of your corporate tax compliance. Every invoice you issue or receive is a data point for your revenue and expense records. Invoices with missing fields or errors can lead to disallowed deductions and MRA queries. Learn about MRA invoice requirements to make sure your records are audit-proof.

Try Fanal free to generate compliant invoices that keep your financial records accurate and ready for tax time.