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Every company wants to know which costs reduce its taxable profit. The answer to the question of tax deductible expenses in a Mauritius company is not a list of items but a test: the cost must belong to the business, be a real cost of the period, and be supported by evidence. This guide walks through that test, then sorts common costs into those usually allowed, those limited, and those refused.
It is general information, not advice. Whether a given payment is deductible often turns on the facts, so a specific case should be reviewed by a qualified adviser.
How the MRA looks at a deduction
Corporate tax is charged on taxable income, not on accounting profit. The standard rate for companies is 15% of chargeable income under the First Schedule, Part IV of the Income Tax Act, for income years starting on or after 1 July 2010. The gap between your accounting profit and your taxable income is made of adjustments, and expenses are the largest part of it.
In practice, the Mauritius Revenue Authority (MRA) tends to ask four questions about each cost:
- Is it a business cost? Was it incurred to earn the company's income, rather than for a shareholder, a director or a family member personally?
- Is it revenue or capital? Day-to-day running costs reduce profit in the year. Spending that buys a lasting asset is treated differently. Relief for equipment and vehicles follows its own rules, covered in capital allowances.
- Does it belong to this period? The cost must relate to the income year in question and be properly recorded in the books.
- Can you prove it? An invoice, a contract, a payroll record or a board decision should back the entry. Weak records are the most common reason a deduction fails on review.
Expenses usually accepted
These categories are generally allowed when they are genuinely incurred for the business and documented:
- Staff costs: salaries, wages and the employer's statutory contributions, supported by payroll records. See payroll in Mauritius for the filing side.
- Premises and operating costs: rent for business premises, utilities, cleaning, repairs and maintenance of the kind that keeps an existing asset working.
- Professional fees for running the business: accounting, audit, legal fees tied to trading and regular compliance work.
- Marketing and sales costs: advertising, a website, trade event participation.
- Insurance on business risks and assets.
- Bank charges and interest on borrowing used for the business.
- Trade-related travel: tickets and accommodation for a business purpose, with a clear itinerary and purpose.
The common thread is a visible link to income. A cost that is ordinary for your sector and sits comfortably next to your turnover rarely causes difficulty.
Expenses that are restricted
Some costs are not refused outright but are accepted only in part, or only when conditions are met. Treat these as adjustment items to check each year:
- Mixed-use costs. A vehicle, a phone or a home office used partly for business and partly privately is deductible only for the business share. Keep a simple log or a reasoned allocation.
- Entertainment and gifts. Client hospitality is a frequent query. The usual approach is to keep the cost proportionate, document who attended and why, and expect scrutiny.
- Related-party payments. Fees, interest or management charges paid to a shareholder or an affiliate should be at a level an independent party would accept, and supported by a written agreement.
- Director pay and benefits. Remuneration must be a genuine reward for work done and properly processed. Our guide on paying a director properly explains the mechanics.
- Payments subject to withholding. Certain payments abroad carry withholding obligations; failing to apply them can put the deduction at risk. See withholding tax.
- Provisions and estimates. A general provision for something that may or may not happen is treated with more caution than a cost that has already arisen.
Expenses usually refused
The following are commonly disallowed in the tax computation, even if they appear in the accounts:
- Private or personal expenses of shareholders, directors or their families paid through the company.
- Capital expenditure charged to the profit and loss account, such as the purchase of a building or machinery, which belongs in the asset register instead.
- Fines and penalties for breaking the law. Late filing charges and surcharges fall in this group; the consequences are set out in penalties for non-compliance.
- Income tax itself, and levies that are really a charge on profit rather than a business cost.
- Dividends and distributions to shareholders. They come out of profit after tax; they are not an expense.
- Costs with no evidence, such as round-sum payments with no invoice or contract.
- Loans written off to a connected person without a commercial reason. The rules on loans to directors are worth reading before the money moves.
A quick comparison
| Cost | Typical treatment | What the MRA will look for |
|---|---|---|
| Employee salaries | Allowed | Payroll records and returns |
| Office rent | Allowed | Lease and payment proof |
| Client dinner | Limited | Purpose, attendees, proportion |
| Company car used privately | Business share only | Usage log or reasoned split |
| Fine for late filing | Refused | Not a business cost |
| Machinery purchase | Not an expense | Handled as a capital item |
| Director's holiday | Refused | Personal in nature |
| Interest paid to a shareholder | Conditional | Agreement, commercial terms |
Use this as a starting point only. The facts of each payment decide the outcome.
From accounts to tax computation
Your annual financial statements are the starting point. The tax computation then adds back the items the Income Tax Act does not allow, and deducts or adds the adjustments it requires. The result is your chargeable income, which feeds the return.
- Close the accounts
Finalise the books for the financial year.
- Add back refused items
Private costs, fines, capital items booked as expenses.
- Adjust restricted items
Apply the business share of mixed-use costs.
- Apply reliefs and losses
Include capital allowances and any losses brought forward.
- File the return
Submit the computation with the return through the MRA portal.
Losses and timing
When expenses exceed income, the company has a tax loss. A company's tax losses can be carried forward over the following five income years, with a restriction if there is a change of more than 50% in the shareholding. Some losses, including those arising from capital allowances, deep ocean water projects and research and development, can be carried forward without a time limit. The page on carrying forward a tax loss covers the detail.
A return is due from every company, whether or not it is taxable. It must be filed with the Director-General no later than six months after the end of the month in which the financial year closes, and filing and payment are made electronically. Section 116(2) sets the deadline at two working days before the end of December for a June year end, and section 116(2C) sets it at two working days before the end of June for a December year end. The online filing walkthrough shows how the process works.
Things that change the picture
Two situations deserve a separate note.
Alternative Minimum Tax. Under section 44A of the Income Tax Act, if a company's normal tax is below 10% of its adjusted book profit, the tax due is set at 10% of that profit. It applies from the income year starting on 1 July 2026 and targets licensed hotels, insurers, financial intermediaries, property companies and telecommunications companies. It does not apply to global business entities, which include holders of a Global Business Licence and Authorised Companies, nor to exempt bodies listed in Part I of the Second Schedule. For affected sectors, heavy deductions may not reduce tax below that floor.
Banks and the FSC. The Fair Share Contribution (FSC) for banks is a separate levy, and no tax credit under the Income Tax Act can reduce it. For large companies more broadly, see the fair share contribution guide.
For most small companies, neither applies, and the general rules above are the ones that matter.
Making deductions hold up on review
Disputes rarely come from a bad rule; they come from missing paper. A few habits help:
- Record the business reason on the invoice or in the accounting entry at the time.
- Keep contracts for recurring services, especially with related parties.
- Split mixed-use costs in the books, not at year end.
- Approve unusual payments by a board decision or a written resolution. Our pages on board resolutions and record keeping explain how.
- Review the file before an MRA query arrives; see preparing for an MRA tax review.
Year-end deduction checklist
- Every expense has an invoice, contract or payroll record
- Capital items are separated from running costs
- Private costs have been removed from the company's books
- Mixed-use costs are split between business and personal use
- Related-party charges are backed by a written agreement
- Fines, penalties and surcharges are added back in the computation
- Payments abroad have been checked for withholding obligations
- Any tax loss brought forward has been included in the computation
FAQ
What makes an expense tax deductible in Mauritius?
In broad terms, the cost must be incurred for the company's business, relate to the period, and be supported by evidence. Private costs and capital spending are treated differently. The precise outcome depends on the facts and the Income Tax Act, so doubtful items should go to an adviser.
Are allowable expenses for the MRA the same as accounting expenses?
No. Accounting rules decide what is recorded in the profit and loss account, while the Income Tax Act decides what reduces taxable income. The tax computation adjusts for the difference, which is why some entries are added back.
Which non deductible expenses in Mauritius appear most often?
Personal spending paid through the company, fines and penalties, capital items booked as expenses, and costs without documents. Distributions to shareholders are also not an expense.
Can a company deduct the cost of a car used by a director?
Only the business share, and only if it can be shown. A car used for both work and private journeys needs a reasoned split, such as a log. Any private element may also need to be treated as a benefit to the director.
Does a loss-making company still file a return?
Yes. Every company must file, whether or not it is taxable. A loss may be carried forward over the following five income years, subject to the shareholding restriction mentioned above. A dormant business has its own routine, described in keeping a dormant company compliant.
Are dividends a deductible expense?
No. They are a distribution of profit and do not reduce taxable income. Dividends paid by a resident Mauritian company are exempt from income tax in the hands of the recipient, with no withholding provided on them, under the Second Schedule, Part II, Sub-part B, item 1. See paying a dividend for the process.
Do global business companies deduct expenses the same way?
The general principles are the same, but global business entities are treated differently in some respects, such as the Alternative Minimum Tax, from which they are excluded. The requirement to be managed and controlled from Mauritius, and the question of what costs relate to that activity, should be reviewed with a provider.
Where can I get help applying this to my company?
A corporate service provider or tax adviser can review your accounts and computation. You can also send a request through the contact form.