Quick answer: When a foreign employee ceases employment in Singapore, the employer must file Form IR21 with IRAS at least 1 month before the cessation date — not after. The employer must withhold all monies owed to the employee until IRAS issues tax clearance. Late filing carries penalties up to S$1,000 per form; non-filing up to S$5,000.
When a foreign employee leaves your company, tax clearance is not something you do after they leave — it starts before their last day. The IR21 filing deadline is at least one month before the cessation date, and you must withhold all monies owed to the employee until IRAS clears the tax. Missing the deadline or failing to withhold makes the employer liable for the employee's unpaid tax. This guide covers the full process, withholding rules, penalties, and how to file correctly. All figures are verified against IRAS as of June 2026. For the broader IRAS filing picture, see our IRAS AIS software guide.
What is IR21 tax clearance?
Form IR21 is the tax clearance form employers must file with IRAS when a foreign employee ceases employment in Singapore. Tax clearance ensures the employee has paid all taxes owed before they leave the country or transfer to an overseas posting.
The process requires the employer to:
- File IR21 with IRAS at least 1 month before the cessation date
- Withhold all monies owed to the employee from the date of cessation notification
- Wait for IRAS to issue a Tax Clearance Certificate or a Directive to Withhold
- Release withheld monies to the employee once tax is cleared (or pay outstanding tax to IRAS from the withheld amount)
When must IR21 be filed?
At least 1 month before the employee's cessation date. Not after they leave — before.
The cessation date is the last day of employment in Singapore. For employees leaving Singapore, file at least 1 month before the expected date of departure. For employees transferring to an overseas branch, file at least 1 month before the transfer date.
This is the most common compliance failure: employers treat IR21 as a post-departure filing, when in fact it is a pre-departure filing. Filing late triggers penalties and makes the employer liable for any tax the employee owes.
Who needs tax clearance?
Mandatory tax clearance:
- All foreign employees (EP, S Pass, Work Permit holders) ceasing employment in Singapore
- Singapore Citizens and PRs who are leaving Singapore after ceasing employment (only if they have tax clearance conditions on their work pass)
No tax clearance needed:
- Singapore Citizens and PRs who remain in Singapore
- Foreign employees who have worked in Singapore for 60 days or fewer (short-term employment exemption)
- Foreign employees transferred to another Singapore company under the same group, subject to conditions
The 60-day exemption does not apply to directors, public entertainers, or professionals (consultants, trainers, etc.). When in doubt, file — the penalty for unnecessary filing is zero; the penalty for not filing when required is significant.
The IR21 tax clearance process
Step 1: Receive notice of cessation
The employee resigns, is transferred, or is otherwise ceasing employment. Record the cessation date immediately.
Step 2: File IR21 at least 1 month before cessation
Submit Form IR21 electronically via IRAS myTax Portal, or through your payroll software if it generates IR21 files. The form requires:
- Employee's personal details (name, NRIC/FIN, passport number)
- Employment details (start date, cessation date, employer reference)
- Year-to-date income (gross salary, bonuses, allowances, benefits-in-kind)
- Tax withheld to date (if any)
Step 3: Withhold all monies owed
From the date you receive notice of cessation (or the last working day, whichever is earlier), withhold ALL monies owed to the employee:
- Unpaid salary
- Bonus and AWS
- Leave encashment
- Notice pay
- Any other payments due
Do not release these funds until IRAS issues a clearance.
Step 4: Wait for IRAS response
IRAS processes the IR21 and issues one of two outcomes:
- Tax Clearance Certificate: Tax is cleared. Release all withheld monies to the employee.
- Directive to Withhold: Tax is outstanding. Pay the outstanding amount to IRAS from the withheld monies, then release the balance to the employee.
If IRAS does not respond within 30 days, you may release the withheld monies.
Step 5: Release or remit
- If cleared: release all withheld funds to the employee
- If tax outstanding: remit the tax amount to IRAS, release the remainder to the employee
- Retain the Tax Clearance Certificate for your records
Withholding monies: what to withhold and when to release
Withholding is the most critical part of tax clearance — and the area where employers most often fail.
What to withhold: ALL monies owed to the employee from the date of cessation notification. This includes salary, bonus, leave encashment, AWS, notice pay, and any other payments.
When to start withholding: From the date the employer receives notice of cessation, OR the employee's last working day, whichever is earlier.
When to release:
- After IRAS issues a Tax Clearance Certificate (tax cleared) — release everything
- After IRAS issues a Directive to Withhold (tax outstanding) — pay IRAS the tax amount, release the balance
- If IRAS does not respond within 30 days — release everything
Failure to withhold: The employer becomes personally liable for the employee's outstanding tax. This is not a fine — it is the actual tax amount owed, which can be substantial.
IR21 filing deadline and processing time
| Action | Deadline |
|---|---|
| File IR21 | At least 1 month before cessation date |
| IRAS processing | Typically 7–21 days (longer during peak: Jan–Mar) |
| Withhold monies | From cessation notification date |
| Release withheld monies | After Tax Clearance Certificate, or after 30 days if no response |
Source: IRAS, verified June 2026
File early. During tax filing season (January to March), IRAS processing times increase. An IR21 filed in February may take 3+ weeks to clear, leaving the employee unable to receive their final pay until March.
Penalties for non-compliance
| Offence | Penalty |
|---|---|
| Late filing of IR21 | Up to S$1,000 per late form |
| Non-filing of IR21 | Up to S$5,000 |
| Failure to withhold monies | Employer liable for the employee's full tax amount |
| Releasing monies before clearance | Employer liable for the employee's full tax amount |
Source: IRAS, verified June 2026
The most severe penalty is not the fine — it is liability for the employee's tax. If an employer fails to withhold and the employee leaves Singapore without paying tax, the employer must pay the tax out of pocket.
Non-resident director withholding tax
Non-resident directors face a separate but related tax obligation. Director's fees paid to a non-resident director are subject to 24% withholding tax (as of YA2024, increased from 22% which applied YA2017–YA2023).
The employer must withhold 24% of the director's fees and remit to IRAS by the 15th of the second month from the date of payment. This is separate from IR21 tax clearance, but the withheld amount affects the tax clearance calculation when a non-resident director ceases their appointment.
How payroll software handles IR21
IR21 filing requires accurate year-to-date income data, correct cessation date tracking, and timely filing — all of which are error-prone when done manually. Payroll software helps by:
- Generating IR21 files in the correct IRAS format from the employee's YTD payroll data
- Tracking the cessation date and flagging the 1-month filing deadline
- Calculating total YTD earnings including salary, bonus, allowances, and benefits-in-kind
- Tracking withholding status so the employer knows when to release funds
AIMM Payroll generates IR21 files in the correct IRAS format from pay run data, including YTD earnings from previous employers if imported. AIMM's direct API submission to IRAS (AIS Category A) is in progress — until then, upload the generated file via the IRAS portal. AIMM's flat per-company pricing starts at S$0 (free for up to 3 employees). Start free.
Frequently asked questions
When must I file IR21?
At least 1 month before the employee's cessation date — not after they leave. If the employee is leaving Singapore, file at least 1 month before their expected departure date. Late filing carries a penalty of up to S$1,000 per form.
What must I withhold when an employee leaves?
All monies owed to the employee: unpaid salary, bonus, AWS, leave encashment, notice pay, and any other payments due. Start withholding from the date you receive notice of cessation or the last working day, whichever is earlier. Release the funds only after IRAS issues a Tax Clearance Certificate or after 30 days if IRAS does not respond.
Who needs tax clearance?
All foreign employees (EP, S Pass, Work Permit) ceasing employment in Singapore. Singapore Citizens and PRs who remain in Singapore do not need tax clearance. Foreign employees who worked 60 days or fewer are exempt (but this does not apply to directors or professionals).
What happens if I forget to file IR21?
Non-filing carries a penalty of up to S$5,000. More critically, if you fail to withhold the employee's monies and they leave Singapore without paying tax, you (the employer) become liable for their full tax amount. File early and withhold promptly.
How long does IRAS take to process IR21?
Typically 7–21 days. During peak tax season (January to March), processing can take 3+ weeks. If IRAS does not respond within 30 days, you may release the withheld monies to the employee.
What is the non-resident director withholding tax rate?
24% as of YA2024 (increased from 22% which applied YA2017–YA2023). The employer must withhold 24% of director's fees paid to a non-resident director and remit to IRAS by the 15th of the second month from the date of payment. This is separate from IR21 but affects the tax clearance calculation.
Does AIMM Payroll handle IR21 filing?
AIMM generates IR21 files in the correct IRAS format from your pay run data, including YTD earnings. AIMM's direct API submission to IRAS is in progress, so you upload the generated file via the IRAS portal until then. Start free.
Summary
IR21 tax clearance is a pre-departure filing, not a post-departure one. File at least 1 month before the cessation date, withhold all monies owed to the employee, and release only after IRAS clears the tax. The most expensive mistake is failing to withhold — that makes the employer liable for the employee's entire tax bill. Non-resident director fees carry a 24% withholding tax (YA2024). Use payroll software that generates IR21 files with accurate YTD data and tracks the filing deadline. See our IRAS AIS software guide and IR8A filing guide for the broader tax filing picture.
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