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GST Filing Process: Steps & Deadlines in IRAS Singapore

Updated on: Feb 24th, 2025

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27 min read

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GST-registered businesses in Singapore must comply with the regulations set by IRAS, ensuring they assess, file periodic returns, and make accurate tax payments. Companies must adhere to these rules to avoid penalties and maintain smooth business operations.

Moreover, filing GST returns involves reporting input and output tax, declaring taxable supplies, and making the necessary payments within deadlines. It ensures transparency and accountability in a regulated tax environment. 

To make it easier for businesses, this guide provides a comprehensive breakdown of the GST e-filing process, GST returns, deadlines, extensions, and all other filing-related compliances for businesses to stay on top of the regulatory requirements. 

What is a GST Return?

A GST return is a document that GST-registered businesses in Singapore must file with the IRAS to report their transactions and tax details for a prescribed period. It summarises key information such as turnover, purchase-related details, or expenses relating to the GST collected and paid by the business. 

  • Summary of Transactions: A GST return will contain the value of all transactions subject to GST, including standard-rated supplies, output tax (GST collected), and input tax (GST paid on purchases).
  • Quarterly Filing: The businesses are supposed to file the GST returns quarterly, within a month after the reporting period ends.
  • Compliance with Tax Rules: Filing GST returns on time helps businesses avoid penalties and additional scrutiny from tax authorities.
  • Current GST Rate: The current GST rate in Singapore is 9% (effective as of 2024) and is levied on most goods and services.

Who is Required to File GST Returns in Singapore?

GST returns must be filed by businesses that are GST-registered, whether the registration is compulsory or voluntary. 

  • Compulsory Registrants: Businesses whose annual taxable turnover exceeds $1 million.
  • Voluntary Registrants: Businesses which have registered for GST voluntarily, even though their turnover is below the threshold.
  • Resident and Non-Resident Taxable Persons: Whether you’re a resident or non-resident taxable person, you will have to file timely and accurate GST returns. 

GST Filing Process in Singapore

Here is a brief overview of the GST filing process for all the returns in Singapore. 

Step 1: Authorise Users for GST Filing

  • Ensure that the right person is authorised for first-time filers or in case of a change in the person filing the return.
  • Any person who files the return must be authorised under Corppass for GST (Filing and Applications).
  • Third parties filing for your business, such as a tax agent, also need authorisation.

Step 2: File Your GST Return via myTax Portal

  • Log in to the "Business Tax Matters" on myTax Portal using your SingPass.
  • SingPass has replaced CorpPass since April 2021.
  • The GST filing process is divided into two stages: preparation by the preparer and submission by the approver. 

Step 3: Save Acknowledgement and Make Payment

  • Once submitted, you will see an acknowledgment page summarizing your filing.
  • If you have GST to pay, make payment by the due date using GIRO, online banking, or other prescribed ways. 
  • If you are requesting a refund, you will usually get it within 30 days unless your return is being reviewed.

Required Details for Various GST Returns in Singapore

Before filing your GST returns in Singapore, it's essential to understand the specific details required for each return type. Here’s a breakdown of the key information you need

GST F5 Return

This is the periodic GST return that GST-registered businesses must file on a quarterly basis. It summarizes the taxable supplies, purchases, and input tax claims during an accounting period. It contains 15-21 boxes, depending upon the type of business, and all the amounts will be in Singapore currency only. 

Here are the details asked in a GST F5 return: 

Box

Particulars

What to Include

What to Deduct/Exclude

1

Standard-Rated Supplies

Sales, deposits, consignment sales, digital services, reimbursements

Out-of-scope supplies, GST collected before registration

2

Zero-Rated Supplies

Exported goods, international services

Credit notes, sales returns, discounts

3

Exempt Supplies

Residential property sales, financial services, forex gains, investment metals

-

4

Total Value

Sum of Boxes (1) + (2) + (3)

-

5

Taxable Purchases

Standard/zero-rated purchases, imports, business expenses

Credit notes, non-business expenses, non-GST suppliers

6

Output Tax Due

GST on sales, recovered debts, imported services

Credit notes, customer-accounted GST

7

Input Tax & Refunds

GST on purchases, refunds, bad debt relief, imports

Credit notes, private expenses, non-claimable expenses

8

Net GST Payable/Claimable

Box 6 - Box 7

-

9

Goods Imported under MES/A3PL

Imports under approved schemes

GST-exempt under these schemes

10

Tourist GST Refund

GST refunded to tourists

-

11

Bad Debt Relief & Reverse Charge Refunds

Claims for unpaid debts, reverse charge adjustments

-

12

Pre-registration Claims

Pre-GST registration input tax

-

13

Revenue

Sales, services, turnover

Grants, asset sales, collections for others

14

Imported Services & Low-Value Goods

Reverse charge applicable services

-

15

Remote Services via E-Marketplaces

Digital services supplied by marketplaces

-

16

Low-Value Goods via Redeliverers

Marketplace sales of imported goods

-

17

Imported Low-Value Goods

Direct sales of low-value imported goods

-

18-21

Import GST Deferment Scheme

Deferred GST on imports (IGDS)

This applies only to IGDS-approved businesses

NIL Return

Even if your business has no transactions during an accounting period, you must still file a GST F5 return by filling '0' for all the applicable boxes. By filing a NIL return, you ensure compliance with the regulations and avoid penalties for failure to file.

GST F7 Return

GST F7 is used to amend errors in previously filed GST returns. Businesses are supposed to file this form when adjustments have to be made to correct prior submissions. 

You can refer to the following table to get a detailed insight into when and how to file GST F7 return: 

AspectDetails
Minor corrections, then report them in the next F5. 

Minor errors can be corrected in the next GST F5 if both the conditions are met:

1. Net GST error is ≤ $3,000 (difference between Box 6 & 7).

2. Other box adjustments (except 6, 7, 12) are ≤ 5% of total supplies (Box 4) or taxable purchases (Box 5).

If you request a refund for overpaid output tax or under-claimed input tax, then file GST F7 Return. 
  • File GST F7 to Submit a full breakdown of errors and refund amounts.
  • Claims must be filed within five years from the end of the relevant accounting period.
  • Submit electronically via myTax Portal. Fill corrected figures (Boxes 1-17). This replaces any prior GST F5, F7, or F8 for that period.
  • You need to make the adjustments within five years from the end of the relevant GST period. 
  • Where errors are being corrected more than one year after the relevant period ends, penalties may be charged. 

GST F8 Return

This is the final GST return a business must file on GST deregistration. It accounts for the business assets held on the last day of registration and all the supplies with invoices or payments made after the deregistration of the business. 

Filing a GST F8 is almost the same as filing a GST F5, except in a few areas. The GST F8 is used once the business cancels its GST registration. Here are the key aspects of GST F8 Filing:

  • Business assets held at the end of registration: You must account for GST on any business assets you hold on the last day of your registration.
  • Supplies made before your cancellation date: For supplies made before your cancellation date but where the invoice and payment occur after the cancellation date, you will still be expected to account for GST on these transactions.

Reporting in the GST F8

  • Box 1: Report the value of assets and supplies of goods/services that fall under these categories.
  • Box 6: Report the corresponding GST amount to be accounted for.

Deadlines for Filing GST Returns

Here is a breakdown of the GST filing deadline in Singapore. The deadlines depend upon whether businesses are following the GIRO plan or not. A GST-registered person with a General Interbank Recurring Order (GIRO) plan in place for GST payments, has a further fifteen days to pay the GST due.

GST Accounting Period

Filing Due Date

Payment Due Date (Without GIRO)

GIRO Deduction Date (With GIRO)

Jan- March

30 Apr

30 Apr

15 May

Apr- June

31 Jul

31 Jul

15 Aug

July- Sep

31 Oct

31 Oct

15 Nov

Oct-Dec

31 Jan

31 Jan

15 Feb

Due dates for special accounting periods: The due date for filing for businesses under special GST accounting periods is one month from the end of the Special Accounting Period.

Consequences for Late or Non-Filing of Tax Returns

Failure to file your GST returns on or before the due date is an offence. IRAS may take the following actions:

  • An immediate penalty of $200 is imposed for late filing.
  • A further penalty of $200 is imposed for every complete month the return is not filed.
  • The maximum penalty per late return is $10,000.

Conclusion

Filing your GST returns on time is important to avoid penalties and complications. Whether it is filing GST F5, F7, or F8, accuracy and timeliness are crucial. Late or non-filing may lead to estimated assessments, late payment penalties, and even legal action in extreme cases. 

Businesses can stay compliant with GST requirements by understanding the filing deadlines, correction options, and the consequences of missed deadlines. Remember, accurate and timely filing of your GST return will save you from costly penalties and ensure smooth business operations.

Frequently Asked Questions

When is the GST Filing deadline?

The GST filing deadline is one month after the accounting period ends. 

What are the different GST filing periods?

GST filing periods are quarterly or annually, depending on your registration status and GST accounting periods.

How do I file my GST returns?

You can file GST returns electronically through myTax Portal by submitting the relevant GST form (F5, F7, or F8).

What are the penalties for late GST filing?

Late filing penalties include a $200 fine and an additional $200 for every month the return remains outstanding.

Can I amend a filed GST return?

Yes, you can amend a filed GST return by submitting a corrected GST F7 with updated figures.

What happens if I have a GST refund due?

From 3 Jan 2022, IRAS will no longer issue cheques for GST refunds. Refunds will be made via GIRO or PayNow.

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