A tax audit follows a calendar — and that calendar protects the company

1. 1. In what forms can the administration audit your company?

Audits are not all alike, and the distinction is not academic: each form carries its own guarantees, its own time limits — and therefore its own response strategy.

An exceptional procedure sits alongside: tax flagrance (art. 20 quater of the procedure code) — immediate finding of a characterised offence such as total absence of accounting or fake invoices. Here the balance of power inverts: conservatory seizure possible, reassessment period extended by two years, loss of the legal payment deferment, registration in the national fraud register. Precisely because flagrance is reserved for extreme situations, the ordinary track above deserves detailed knowledge.

2. 2. What must the audit notice contain — and why does every mention matter?

No accounting verification may begin without a notice sent or delivered with acknowledgement of receipt, accompanied by the charter of rights and obligations of the audited taxpayer. Article 20 of the procedure code sets a minimum preparation delay of ten days between reception and the first intervention.

The notice must then state, on pain of nullity of the procedure:

• the names and ranks of the designated auditors;
• the date and time of the first intervention;
• the period audited and the duties, taxes and levies concerned;
• the documents to be examined;
• an express mention of your ability to be assisted by counsel of your choice.

This last mention is both the most neglected and the most useful: a procedure opened on a notice silent about counsel is a flawed procedure. In observed practice, companies that reread the notice on the day it arrives — not on the morning of the visit — use those ten days to gather documents, alert their accountant and calmly decide on counsel. Ten days too short? That is exactly why they exist.

3. 3. How long can the auditor stay on your premises?

The auditor's stay is not unlimited, and the bound depends on turnover:

Four safeguards complete the framework. The end of work is recorded in a report you are invited to countersign — refusing to sign blocks nothing, but insist your refusal be noted. A completed audit cannot be repeated over the same period for the same taxes: an audit is a single passage, not a recurring threat. Duration extends only by the delay granted to answer clarification requests — notably where indirect profit transfer is presumed, with a six-month extension available when information requests go to foreign tax administrations. Finally, since FA 2025, if no anomaly is found the administration must notify you of this absence of reassessment by registered letter — a written ending, not silence.

4. 4. What does a company actually risk during an audit?

An audit's cost combines reassessed duties, late-payment interest, then surcharges whose rate hardens with filing delays or with the qualification retained. The most common declarative scales in practice:

On substance, specific surcharges sanction under-declaration or omission, at a rate that hardens when the administration retains characterised fraudulent manoeuvres — and it is precisely at that boundary that the defence is argued. We do not publish these rates here: reading them requires the consolidated code edition, file in hand, and transposing them from another jurisdiction would be the very error our articles combat.

5. 5. Disagreeing with the reassessment: which appeals, in which order?

The reassessment notification must be sent by registered letter with acknowledgement of receipt, even where there are no reassessments or the accounts are rejected, and detailed enough for you to reconstruct the assessment bases. From there, the path follows an order that the 2025 Finance Act significantly shortened:

This shortcut to the judge reshapes negotiation strategy: a credible litigation prospect now weighs from the written-reply stage onward. In our engagements, files prepared as though they would reach the judge almost always settle before.

6. 6. What should be in order before the envelope arrives?

The entire edifice of guarantees above rests on one simple premise: the best time to prepare for an audit is the eve of its notification. The minimal checklist we apply in our engagements:

• Up-to-date fiscal ceilings — most reassessments are born of an outdated add-back schedule, not fraud: our article Deductible expenses: the real ceilings covers this in depth;
• A clean banking trail — the auditor systematically reconciles declared revenue against professional-account flows; every unexplained gap becomes a formal question;
• Complete, named invoicing — the customer schedule is itself an audited document today, with its own fines;
• Manager outflows through proper channels — current accounts, advances, benefits in kind are the first points questioned: our article Taking money out of your company details the regular channels;
• A filing system where every document is findable — ten days barely suffice when everything is organised, and never suffice when it must be rebuilt.

FAQ — Frequently asked questions

BENSAID Farouk

Financial & Economic Research Consultant — ProfitPilot NextGen Consulting

Certified sole trader and expert in financial studies, risk analysis and market research for SMEs, startups and investors in Algeria. View full profile