Tax Audits and Appeals in Iran: From the Assessment Notice to a Final Ruling

An assessment notice is not the end of the matter; it is the start of a timed process that is usually manageable if you know the deadlines and unmanageable if you do not. This is written for managers and accountants who have just received a notice, or who want the file ready before an audit begins.

How an audit starts

After the corporate return is filed, files are selected for examination on risk indicators. The auditor typically opens with a written request for the books and supporting documents, then compares your figures against the administration's databases: quarterly transaction reports, electronic invoices, customs data, banking information and payroll filings.

The outcome is written up in an audit report, and the assessment notice is issued on that basis. Electronic service through the portal is legally valid — not having opened the message is not an excuse for missing the deadline.

The appeal path

The advice I repeat to every client: do not skip past the Article 238 stage. With complete, indexed documents, much of the disagreement is settled there and the file never reaches a board.

What a defence file needs

A brief full of legal argument and empty of documents does not work. A workable file contains:

1. The assessment notice and audit report, with each disputed item numbered.
2. The return, trial balance, general ledger and statutory books for that year.
3. Underlying evidence for each disputed item: contracts, invoices, delivery notes, goods receipts, bank records.
4. Financial statements and, where they exist, the audit report.
5. A reconciliation of filed quarterly reports and issued invoices to the books.
6. A one-page table: office's claim / our answer / document reference.

That one-page table is the most effective device I have seen in board hearings. Members have limited time; the faster they can trace a claim to a document, the better the outcome.

Recurring disputes

Disallowed expenses. An expense is accepted when it relates to earning income, is reasonable in amount, is supported by documents and belongs to the period. Rejections almost always trace to one of those four conditions being undocumented rather than to the expense being denied outright.

Concealed income. The office normally reaches this conclusion by comparing declared sales with electronic invoices, quarterly reports and bank transactions. An effective answer shows, with documents, the non-revenue nature of specific credits — a blanket denial achieves nothing.

Rejected books. Address the specific defect cited. General assertions about the accuracy of the accounts do not cure a formal defect.

Hearing conduct

Penalties and enforcement

Late payment penalties accrue monthly, and many penalties can be reduced for taxpayers with a clean record; penalties for concealment and fictitious expenses cannot. The routes and conditions are set out in tax penalties and waiver options.

Once the tax is final, a demand and then an enforcement notice are served, followed by a short payment window before collection measures such as account or asset seizure begin. A complaint about the enforcement itself follows the separate Article 216 route and is distinct from disputing the tax.

Prevention

The best defence is a file built during the year: monthly reconciliation of sales to issued invoices, orderly contract archiving, written explanations for unusual items, and a bank record behind every material event. That discipline costs a fraction of defending a file after the notice arrives — the same logic that applies when preparing the corporate tax return.

Key takeaways

• Thirty days to object, counted from service including electronic service.
• Article 238 is the cheapest place to settle a dispute.
• Arguments without indexed documents carry no weight at a board.
• Separating assessment differences from concealment protects waiver options.
• Complaints about enforcement have their own route and deadline.