Does 1 Month Notice Mean 30 Days in Hong Kong?

Short answer

No — not necessarily. Under the Hong Kong Employment Ordinance rule explained by the government’s 1823 service, one month is a calendar-month period, not automatically 30 days. The notice day is included, and the period normally ends at the end of the day before the corresponding date in the following month. Special month-end rules apply if there is no corresponding date or notice starts on a month’s last day. The calculator must therefore receive notice value 1 and unit months, never 30 days.

Calculate my 1-month notice

Independent planning worksheet. Not a government calculator or legal advice.

Official rule

For notice expressed in months, the notice day is included. One month ends at the end of the day before the corresponding date in the following month. If there is no corresponding date, or notice starts on the last day of a month, the official rule uses the applicable month-end treatment.

Key points

One month is a calendar-month unit, not a fixed 30-day substitute.
The day notice is given is included for a month-based notice period.
Month-end cases have specific handling when the next month lacks a corresponding date.

Worked example

Official one-month example

Notice given on 13 February runs through the end of 12 March.

This is the date example published by the Hong Kong Government’s 1823 service.

What changes the answer

• Whether the contract expresses notice in months, days, or weeks.
• Whether the next month has a corresponding date.
• Whether the notice date is the last day of a month.

What to confirm with HR

• Does the contract say one month or a fixed number of days?
• What date does HR record as the notice date?
• What employment end date has HR calculated under the calendar-month rule?

Calculator

Hong Kong one-month notice calculator

Opens the existing calculator with notice value 1 and unit months preserved.

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Official Source Cards

These sources informed the page cautions and calculator assumptions. Always open the official guidance before relying on a final pay decision.

Verifiedgovernment guide

How to calculate the notice period or payment in lieu of notice

Hong Kong Government 1823

Used for the official calendar-month counting explanation and worked examples linked to the Employment Ordinance.

Last checked: 2026-09-09
Used for: calendar-month notice, 13 February to 12 March example, payment in lieu formula

Open official source

Verifiedgovernment guide

Employment Ordinance FAQ: Termination of Contracts of Employment

Hong Kong Labour Department

Used for Hong Kong notice and payment in lieu context, including average wage cautions.

Last checked: 2026-09-09
Used for: payment in lieu of notice, notice period, terminal payment cautions

Open official source

Last reviewed: 2026-09-09

FAQ

Why can one month have more or fewer than 30 days?

Because a month-based notice period follows corresponding calendar dates and month-end rules rather than substituting a fixed day count.

What preset does the calculator receive?

The CTA passes Hong Kong, notice value 1, and notice unit months through the existing calculatorEntry model. It does not pass 30 days.

Hong Kong notice period calculator Hong Kong payment in lieu of notice

General estimates only. This calculator provides a general estimate based on public information and the details you enter. It is not legal advice and does not replace your employment contract, award, enterprise agreement, collective agreement, company policy, HR advice, or official government guidance. Rules can change and special circumstances may apply. Always verify your final pay with your employer, HR, a qualified advisor, or the relevant government authority.

Need the jurisdiction overview? Review the Hong Kong guide.