You are required to file your GST returns and pay any tax due by the due dates. You must file a 'Nil' GST return even if there is no business activity during the accounting period.

Due date for filing and payment

Both GST returns and payment are due one month after the end of the accounting period covered by the return. If you are on GIRO plan for GST payment, GIRO deductions are on the 15th day of the month after the payment due date. You may refer to your acknowledgement page for payment details after you have filed.

Without GIRO plan

GST Accounting Period Filing and Payment Due Date
Jan - Mar 30 Apr
Apr - Jun 31 Jul
Jul - Sept 31 Oct
Oct - Dec 31 Jan


With GIRO plan for GST payment

GST Accounting Period Filing Due Date GIRO Deduction Date
Jan - Mar 30 Apr 15 May
Apr - Jun 31 Jul 15 Aug
Jul - Sept 31 Oct 15 Nov
Oct - Dec 31 Jan 15 Feb


Due dates for Special Accounting Periods

If you are under special GST accounting periods, the deadline to submit your returns is 30 days from the last date of the Special Accounting Period.

Example: Special Accounting Periods

If the GST return is for the special accounting period from 5 Apr 2021 to 5 Jul 2021, the due date to submit your return is 5 Aug 2021.

Penalties for late filing and late payment

Penalties will be imposed if you are late in filing your GST return and making payment.

Requesting for extensions

All GST-registered businesses need to put in place systems to track their transactions, and plan their resources to submit their GST returns on time.

As one month after the end of your accounting period is a reasonable deadline, no extensions will be granted.

Exceptions will only be made for newly registered businesses and for circumstances that fall within the list of acceptable reasons below.

To allow us sufficient time to process your request, please submit this form early. Your form will be processed within 3 working days from the date it is received. We will notify you of the outcome via the email address provided in the form. For approved applications, you can also view the extended due date for filing of your GST return under myTax Portal > Overview > Tax Filing Status > GST.

Acceptable reasons for extension

No. Acceptable Reasons Documents Required Maximum extension granted
1 Newly GST-registered businesses (1st GST return) Nil 1 month
2 Breakdown of computer system e.g. IT servicing report 2 weeks
3 Purchase of new accounting software and/or IT system Tax invoice  2 weeks
4 Key accounting personnel on long medical leave (more than 1 week) or hospitalization leave Medical/ hospitalisation certificates 2 weeks
5 Re-structuring of company e.g. Notice of restructuring, media release 2 weeks
6Software issues or errors encountered when submitting GST returns via seamless filing software through APINil2 weeks

Unacceptable reasons for extension

No extension will be granted for the following reasons

No.Reasons Which Are Not Acceptable


Staff on maternity leave


Director or key accounts personnel is overseas


Staff has resigned without proper handover


Closing of accounts at year-end


New accounts personnel does not know how to handle GST matters


No computer


Not enough manpower to handle GST matters

Receiving GST refunds

From 3 Jan 2022, IRAS will no longer issue cheques for GST refunds. Refunds will be made via GIRO or PayNow. If you have signed up for both GST GIRO refund and PayNow, refunds will be credited to the GIRO bank account. To ensure that you receive your GST refunds, please sign up for GIRO or PayNow with your business/ organisation's bank account. For more information, please refer to the FAQs on Mandate Electronic Refund for GST (PDF, 256KB). 

Any GST refund will be made to you within a period equivalent to your prescribed accounting period, from the date the Comptroller receives your GST return.

Example: GST refunds

If you are under a quarterly GST accounting cycle, the refund will be made to you within three months from the date the Comptroller receives your GST return.

This does not apply under certain circumstances such as when you have outstanding GST returns which are not submitted, or when your GST return is being reviewed by our auditor.