Call IRAS corporate tax support from abroad
For overseas callers with Singapore corporate income tax, ECI, Form C-S or Form C questions.
+65 6356 8622
$0.15/min on Basic.
Source checked October 9, 2026: IRAS, Corporate income tax contact.
Airlophone is not affiliated with this institution.
When to call
Monday to Friday, 8am to 5pm Singapore time. Closed on public holidays. Christmas, New Year and Chinese New Year eves have shorter hours, ending at 1pm.
Check this office in your time zoneHow to place the call
- 01 / Press Call now and sign in.
- 02 / Add credit if needed. Your number stays selected after payment.
- 03 / Review the rate for +65 6356 8622, allow microphone access and press Call.
- 04 / Keep the call tab open. Use the keypad for menu choices. You join the institution's ordinary queue.
Use Wi-Fi or mobile data. Airlophone does not require a local SIM, but your internet provider may charge for data.
Before you call
IRAS publishes this overseas number for corporate income tax. For personal income tax, GST, tax recovery or S45 filing and payment, check the separate contact paths on the official page.
Have the company UEN, tax year and relevant notice ready. IRAS may verify your authority to discuss the company.
Never give a password, PIN or one-time code to an unexpected caller. Check the number against the official website or your card before calling.
Use myTax Portal for available company-tax transactions and secure correspondence. See official support options.
Questions about calling IRAS corporate tax support
What number should I use to call IRAS corporate tax support from abroad?
Use +65 6356 8622 for overseas callers with Singapore corporate income tax, ECI, Form C-S or Form C questions. IRAS publishes this overseas number for corporate income tax. For personal income tax, GST, tax recovery or S45 filing and payment, check the separate contact paths on the official page.
How much does a browser call to IRAS corporate tax support cost from abroad?
$0.15/min on Basic. The quote uses Airlophone's default US caller ID. Your location does not set the rate. A different caller ID or Professional calling can change it; check the final quote in the keypad.
When can I call IRAS corporate tax support from abroad?
Monday to Friday, 8am to 5pm Singapore time. Closed on public holidays. Christmas, New Year and Chinese New Year eves have shorter hours, ending at 1pm. Confirm current availability with the official source before calling.
Do I need a local SIM or an international dialing prefix?
For a browser call, enter +65 6356 8622 including the plus sign. Do not add 00 or 011 before it. Airlophone uses your internet connection and microphone; the recipient answers on their ordinary phone.
Does this number bypass the phone menu or waiting queue?
No. You reach the institution's ordinary phone service, including its menu, identity checks and queue. Keep the call tab open and use the keypad when the menu asks for digits.
Can I get help without making a phone call?
Use myTax Portal for available company-tax transactions and secure correspondence.