Dubai Silicon Oasis companies file audited financial statements within four months of their financial year end, signed by a firm the authority recognises. Both halves of that sentence fail people. The deadline moves with your year end rather than the calendar, and the register is checked at submission, not at engagement.
DSO approved auditors sit under DIEZ, and that is the first check
Dubai Silicon Oasis Authority now operates within DIEZ, the Dubai Integrated Economic Zones Authority, alongside DAFZA and Dubai CommerCity. Practically, that means auditor recognition is administered at the DIEZ level rather than by a standalone DSO list of the kind DMCC or JAFZA maintain.
It also means a firm's status can differ from what an older marketing page claims. Plenty of pages on the internet still describe a DSO-only approved auditor list. Confirm current registration with the authority before you sign, not after the report is drafted, and get it in writing.
The four-month deadline, counted from your year end
The requirement is four months from the end of the financial year, not a fixed date in the calendar. A December year end is the common case and produces the 30 April date most people have heard. If your year end is anything else, that date is wrong for you.
| Financial year end | Audited statements due | Start the audit by |
|---|---|---|
| 31 December | 30 April | Late January |
| 31 March | 31 July | Late April |
| 30 June | 31 October | Late July |
| 30 September | 31 January | Late October |
The third column is ours, not the authority's. Ten to twelve weeks is what a clean audit takes when the books are ready, and books are rarely ready. Companies that start in the final month are the ones that file late, because the first week is always spent reconciling something nobody looked at during the year.
What the authority is actually checking
Submission is an administrative gate, not a review of your business. Three things decide it: the report exists, it covers the right period, and it is signed by a firm that is registered. Nothing about the quality of your trading year enters into it.
That is worth understanding because it tells you where the risk sits. A loss-making year does not fail. A profitable year signed by an unregistered firm does.
What your auditor will ask for
Have these ready before the engagement letter is signed and the timeline halves:
- Trade licence and incorporation documents — the licence, Memorandum and Articles, and any amendments made during the year.
- Trial balance and general ledger for the full period, in a format that exports.
- Bank statements for every account, for the whole year, including accounts that were closed mid-year.
- Sales and purchase invoices, with contracts for anything material.
- VAT returns and supporting workings — mismatches between VAT filings and the ledger are the single most common cause of delay.
- Payroll records and the WPS file, plus end-of-service provisioning.
- Fixed asset register with additions, disposals and depreciation.
If your bookkeeping is behind, deal with that before you engage an auditor rather than during. Our note on audit cost in Dubai explains why a messy trial balance moves the fee more than the size of the company does, and the audit fee calculator gives you a range before anyone quotes.
What happens when you miss it
Late filing is treated administratively: penalties, and a renewal that will not complete until the report is accepted. The renewal is the part that hurts, because visa processing sits behind it and, in some cases, so does a bank account review.
The compounding problem is that an audit signed by the wrong firm is not salvageable. A registered firm has to do its own work and sign its own report, so you pay twice and lose the weeks in between. If you are already past the date, what to do after a missed free zone audit deadline sets out the order to work in.
How to verify a firm before you sign
- Ask for the registration, not the trade licence. A licence permits a company to trade in audit services. Registration is what lets it sign your accounts.
- Ask which partner signs, by name. Registration attaches to the individual as well as the firm.
- Confirm with the authority in the current year. Registers are amended and firms come off them.
- Ask whether they have filed at DSO before. Familiarity with an authority's format is the difference between one submission and three.
The same discipline applies in every zone. Our overview of audit firms in the UAE maps each jurisdiction to the list that governs it.
Not sure when your DSO audit is due?
Send the trade licence. We will confirm your year end, the filing date it produces, and what to have ready.
Common questions
Yes. DSO companies are required to prepare audited financial statements and file them with the authority, and the filing is checked against licence renewal. It is not optional for dormant or loss-making companies either.
Four months after the end of your financial year. For a 31 December year end that is 30 April. If your year end is 31 March, 30 June or 30 September, your date is 31 July, 31 October or 31 January respectively.
No. The firm has to be registered with the authority. DSO now sits within DIEZ, so recognition is administered at that level rather than through a standalone DSO list, and status should be confirmed with the authority in the current year before you engage anyone.
Not automatically. Each authority administers its own recognition and there is no reciprocity between them. If you hold licences in more than one zone, check the same firm against each before consolidating the work.
A dormant company still files. The audit is shorter and cheaper because there is little to test, but the report still has to exist and still has to be signed by a registered firm.
Administrative penalties, and a licence renewal that will not complete until the report is accepted. Prolonged non-compliance escalates towards suspension. In practice the renewal delay costs more than the penalty, because visas and banking sit behind it.