How to Notify Commencement of Business in Hong Kong (2026)

Most founders who incorporate a Hong Kong company assume that receiving their Business Registration Certificate means their registration is complete. It isn't. There's a second, mandatory step that most incorporation services don't mention: filing Form IRBR200, the Notification of Commencement of Business. You have exactly one month from the date you actually start operating to file it with the Inland Revenue Department (IRD).

This article is written for founders who have already incorporated a Hong Kong company — or are in the process — and are now setting up their first real operations. It covers what 'commencement of business' means under Hong Kong law, how to complete and submit Form IRBR200, what happens if you miss the deadline, and two scenarios most guides skip: what to do if your company is dormant and not yet trading, and how your commencement date connects to when you'll need to file your first Profits Tax Return.

Commencement of business is the date on which a Hong Kong company actually begins carrying out its trade, profession, or business, as defined under the Business Registration Ordinance (Cap. 310). It is not the date of incorporation, and it is not the date your Business Registration Certificate was issued.

Under the Ordinance, every company registered in Hong Kong must notify the IRD of its commencement of business within one month of that date, by filing Form IRBR200 — the Notification of Commencement of Business by Corporation.

No — and conflating the two is a common compliance gap for newly incorporated Hong Kong companies.

When you register a company through the one-stop company and business registration service, the Companies Registry and the IRD process your application simultaneously. Your Business Registration Certificate (BRC) is issued automatically as part of that joint process.

What the one-stop process does not cover is notification that your company has actually started operating . That is a separate filing — Form IRBR200 — which you submit yourself once operations begin.

The IRD needs both. Neither filing replaces the other.

⚠️ Important: Missing the one-month notification window after commencement — even if your BRC is in hand — can result in penalties from the IRD.

There is no exhaustive statutory definition of when a company 'commences business' — the IRD applies a practical test based on whether the company is actively conducting its trade, profession, or business. 

In practice, the following are generally taken as indicators that business has commenced:

• Issuing your first invoice to a client
• Signing your first commercial contract
• Hiring your first employee or engaging contractors for operational work
• Renting or leasing office, warehouse, or retail space
• Launching a commercial website or accepting online orders
• Receiving your first payment from a customer

The trigger is operational activity, not administrative setup. Opening a bank account to receive your incorporation refund or to hold capital does not constitute commencement. Signing a lease for future use, registering domain names, or applying for licences before trading begins are typically preparatory steps, not commencement.

📌 Holding companies are a grey area. If your Hong Kong holding company receives dividends, rental income, or interest, the IRD generally treats that as business activity — you need to file IRBR200. If it isn't generating any income yet, consult a qualified Hong Kong accountant before you decide.

The one-month clock starts from your commencement date — the actual date your company first carried on its business activities. Not your incorporation date. Not the date your BRC was issued. The date you started operating.

Here's what that looks like in practice:

If you incorporate and immediately begin operating, your commencement date may be the same as your incorporation date — your one-month window starts immediately.

💡 Tip: Keep a record of when specific activities started — your first signed contract, your first invoice, the date you officially opened for business. If the IRD ever queries your commencement date, dated records (emails, invoices, agreements) are far more defensible than a rough estimate.

Filing Form IRBR200 is straightforward, but the submission method has a constraint most founders don't expect — there is no online option.

Here's how to complete and submit it correctly.

Step 1: Download Form IRBR200

Download Form IRBR200 as a fillable PDF from the IRD's public forms page at ird.gov.hk. The form is available in both English and Chinese.

Step 2: Fill in Your Company Details

The form requires the following information:

• Company Name: As it appears exactly on your Business Registration Certificate
• Business Registration Number (BRN): Your 8-digit BRN, found on your BRC
• Registered Office Address: The address on record with the Companies Registry
• Business Address: Where you actually conduct operations — may differ from your registered address
• Nature of Business: A brief description of what your company does (e.g., 'import and export of consumer goods', 'software development services')
• Date of Commencement of Business: The actual date your first business activity took place
• Names and ID numbers of directors: Hong Kong ID or passport number for each director
• Contact information: A reachable email address and phone number
• Bank account details: The name of the bank and your account number

Step 3: Sign and Date the Form

The form must be signed by a director, company secretary, or authorised representative. Electronic signatures are not accepted — a wet-ink signature is required.

Step 4: Submit to the Business Registration Office

Send the completed, signed form to the Business Registration Office by post or deliver it in person:

Business Registration Office Inland Revenue Department Revenue Tower, 5 Gloucester Road, Wan Chai, Hong Kong

No filing fee is payable for the IRBR200 notification.

📌 Note: Keep a copy of the submitted form and your postage receipt — if the IRD has no record of receipt, these are your proof of submission.

A dormant company is one that has been incorporated but has not yet commenced any business activities. If your company is genuinely dormant — no invoicing, no staff, no operational contracts — the IRBR200 filing obligation has not been triggered. The obligation is tied to commencement, not incorporation.

💡 When the clock starts for a dormant company: The filing obligation begins the moment you first invoice, sign a commercial contract, or hire staff — whichever comes first. One trigger to watch: if the IRD issues you a Profits Tax Return (BIR51) before you've filed IRBR200, treat it as a prompt to file immediately.

Dormancy does not mean zero compliance. A dormant company is still required to renew its Business Registration Certificate annually and maintain its statutory records. The IRBR200 notification simply isn't due until operations begin.

The date you report on Form IRBR200 is the date the IRD uses as the starting point for your profits tax assessment. Your first Profits Tax Return (Form BIR51) will typically be issued approximately 18 months after that date, covering your first accounting period from commencement.

Three things can go wrong if the date is off:

• If your commencement date is earlier than you realise — because you started invoicing before formally notifying the IRD — your first accounting period is longer than planned, potentially covering revenue you hadn't prepared for.
• If your commencement date is later than your incorporation date — common for companies that took time to land their first client — the profits tax assessment is delayed accordingly. This is fine, but only if the date you report reflects reality.
• If you report an incorrect date, even unintentionally, you create a mismatch between your accounting records and your tax assessment period. Correcting it later is unnecessary overhead.

Get the commencement date right. It is not a formality — it anchors your tax calendar.

Failing to file Form IRBR200 within one month of commencement is a criminal offence under the Business Registration Ordinance (Cap. 310) — not an administrative oversight. 

📌 Penalty: Fine of up to HKD 5,000 and up to one year's imprisonment

In practice, the IRD rarely pursues criminal proceedings against founders who file late. But rare is not never — and the risk is not worth taking.

If you have already missed the deadline, file immediately. A late filing with no prior enforcement action is a far better position than continued non-compliance.

⚠️ Note: Penalty provisions under the Business Registration Ordinance (Cap. 310) are subject to legislative change. Verify current requirements directly with the Inland Revenue Department or a qualified Hong Kong solicitor before relying on this information.

The commencement of business notification is one of several deadlines your company secretary manages after incorporation — alongside your Business Registration Certificate renewal, annual return, and IRD correspondence. Miss one and you're looking at penalties.

Statrys includes company secretary services in the incorporation package, so these filings are tracked and handled for you from the start. The package covers:

✔️ Preparation and filing of all incorporation documents 

✔️ A Hong Kong-registered address with mail scanning 

✔️ Ongoing company secretary services to keep you compliant after incorporation 

✔️ Online access to your company documents

The entire process is handled online. You choose your company name, complete the sign-up form, and the Statrys team takes care of the filings

You can also get support with opening a multi-currency business account and access pay-per-use accounting services on the same platform.