Miss your GSTR-1 filing deadline and you face a late fee of Rs 50 per day under Section 47 of the CGST Act, 2017 - capped at Rs 10,000 for businesses with turnover above Rs 5 crore. File incorrect details of your outward supplies and the penalty under Section 122 can reach Rs 10,000 or the tax evaded, whichever is higher. For most Indian SMEs, "outward supplies" is the single most important GST concept to get right because it determines what you report, when you report it, and how much you pay if you get it wrong.

This guide explains what outward supplies means under the CGST Act, who must report them, the filing deadlines, the late fee structure, and the penalties for non-compliance - all with the specific sections, amounts, and dates you need to stay compliant.

What Are Outward Supplies Under GST?

Section 2(83) of the Central Goods and Services Tax (CGST) Act, 2017 defines "outward supplies" as:

In relation to a taxable person, means supply of goods or services or both, whether by sale, transfer, barter, exchange, licence, rental, lease or disposal or any other mode, made or agreed to be made by such person in the course or furtherance of business.

In plain terms: every sale your business makes - whether you sell products, provide services, rent out equipment, or transfer goods - is an outward supply. The mode does not matter. A cash sale, a credit sale, a barter, a lease - all count. What matters is that the transaction happens in the course or furtherance of your business.

What Counts as an Outward Supply?

Here is what you must report as outward supplies in your GSTR-1 return:

If your business makes any of these transactions, you must report them. Even if you had zero sales in a month, you must file a nil return.

What Is Not an Outward Supply?

Transactions that are not made in the course or furtherance of business are not outward supplies. For example, selling your personal car is not an outward supply because it is not a business transaction. However, selling a delivery vehicle that your business owns and uses for operations is an outward supply because it is a business asset.

Who Must Report Outward Supplies?

Every registered taxable person under GST must file GSTR-1, which is the return for reporting outward supplies. This applies regardless of whether you had any sales during the period.

The following registered persons are exempt from filing GSTR-1:

If you are a regular GST-registered business - which covers the vast majority of SMEs, manufacturers, traders, and service providers - you must file GSTR-1 every month or quarter, depending on your turnover.

GSTR-1 Filing Due Dates Based on Turnover

The due date for filing GSTR-1 depends on your aggregate turnover in the previous financial year. The GST regime divides taxpayers into two categories:

Monthly Filers (Turnover Above Rs 5 Crore)

If your aggregate turnover in the previous financial year exceeded Rs 5 crore, you must file GSTR-1 every month by the 11th of the following month.

For example, for the month of August 2026, your GSTR-1 is due on 11th September 2026.

Quarterly Filers Under QRMP Scheme (Turnover Up to Rs 5 Crore)

If your aggregate turnover in the previous financial year was up to Rs 5 crore, you can opt for the Quarterly Return Filing and Monthly Payment of Tax (QRMP) scheme. Under QRMP, you file GSTR-1 quarterly by the 13th of the month following the quarter end.

The QRMP due dates for FY 2026-27:

  1. April–June 2026 quarter: due 13th July 2026
  2. July–September 2026 quarter: due 13th October 2026
  3. October–December 2026 quarter: due 13th January 2027
  4. January–March 2027 quarter: due 13th April 2027

Under QRMP, you also need to make monthly tax payments using form PMT-06 by the 25th of the following month, even though the return itself is filed quarterly.

Important: Three-Year Filing Window

As per an amendment to Section 37 of the CGST Act, you cannot file GSTR-1 beyond three years from its original due date. If you have pending returns older than three years, the GST portal will permanently block them. This means old compliance gaps cannot be fixed through regular filing - you may need to approach the jurisdictional officer or wait for an amnesty scheme.

Late Fee for Delayed Filing Under Section 47

Section 47 of the CGST Act, 2017 levies a late fee for failing to file GSTR-1 by the due date. The base rate is Rs 100 per day (Rs 50 CGST + Rs 50 SGST), but the government has rationalized the maximum late fee based on your turnover.

Late Fee Structure for GSTR-1

The following table shows the late fee applicable based on your annual turnover in the previous financial year:

Annual Turnover (Previous FY) | Per Day Late Fee (CGST + SGST) | Maximum Late Fee (CGST + SGST)

Nil return | Rs 20 (Rs 10 + Rs 10) | Rs 500 (Rs 250 + Rs 250)

Up to Rs 1.5 crore | Rs 50 (Rs 25 + Rs 25) | Rs 2,000 (Rs 1,000 + Rs 1,000)

Rs 1.5 crore to Rs 5 crore | Rs 50 (Rs 25 + Rs 25) | Rs 5,000 (Rs 2,500 + Rs 2,500)

Above Rs 5 crore | Rs 50 (Rs 25 + Rs 25) | Rs 10,000 (Rs 5,000 + Rs 5,000)

Key points about the late fee:

Example: Late Fee Calculation

Say your business has a turnover of Rs 3 crore and you file GSTR-1 for August 2026 (due 11th September 2026) on 25th September 2026 - a delay of 14 days. Your late fee would be Rs 50 per day × 14 days = Rs 700 (Rs 350 CGST + Rs 350 SGST). Since this is below the Rs 5,000 maximum for your turnover bracket, you pay the full Rs 700.

If the delay stretched to 120 days, your late fee would be capped at Rs 5,000, not Rs 6,000 (Rs 50 × 120).

Penalties Under Section 122 for Incorrect Outward Supply Reporting

Filing late is one thing. Filing incorrect details of your outward supplies - or not filing at all with intent to evade tax - triggers a different and more severe penalty under Section 122 of the CGST Act.

Section 122(1) lists the offences that attract penalty. The relevant ones for outward supplies include:

The penalty under Section 122(1) is Rs 10,000 or the tax evaded, whichever is higher.

Section 122(2): Penalty for Short-Paid Tax

If tax has not been paid, short-paid, or erroneously refunded - or if ITC has been wrongly availed - Section 122(2) applies:

The difference is significant. A genuine mistake costs you 10% of the tax due. A deliberate suppression of outward supplies costs you 100% of the tax due - plus the tax itself.

Interest Under Section 50

Separate from the late fee and penalty, Section 50 of the CGST Act levies interest at 18% per annum on the tax amount that was not paid or was short-paid. This interest runs from the date the tax was due until the date it is actually paid. So if you under-reported your outward supplies and paid less tax, you owe the tax shortfall plus 18% interest plus the applicable penalty.

How to Correct Mistakes in Outward Supply Reporting

A GSTR-1 return once filed cannot be revised. However, the GST system provides two mechanisms to correct errors:

GSTR-1A: Rectification Before Filing GSTR-3B

As per the CGST notification issued in July 2024, you can file GSTR-1A to rectify mistakes in your GSTR-1 before you file the corresponding GSTR-3B for the same period. This is the primary window for corrections. Once GSTR-3B is filed, GSTR-1A is no longer available for that period.

Amendments in Subsequent GSTR-1

If the GSTR-1A window has passed, you can report amendments in the GSTR-1 of a subsequent tax period. Table 9 of GSTR-1 is specifically for amendments to outward supplies reported in earlier periods. You can amend details originally reported in Tables 4, 5, and 6.

However, amendments have a time limit. You cannot amend GSTR-1 details beyond the due date for filing the return for the month of September following the end of the financial year to which the original invoice pertains, or the actual date of filing the annual return, whichever is earlier.

Common Mistakes Businesses Make With Outward Supplies

Based on the compliance patterns we see across Indian SMEs, here are the most frequent errors in outward supply reporting:

  1. Missing the B2C threshold reporting - Inter-state B2C sales above Rs 2.5 lakh per invoice must be reported in Table 5, not Table 7. Many businesses report all unregistered sales in Table 7, which triggers notices.
  2. Not reporting advances - If you receive an advance payment for a supply of goods, you may need to pay GST on the advance. Table 11 of GSTR-1 captures this, but most businesses skip it.
  3. Incorrect HSN/SAC codes - Table 12 requires HSN-wise summary of outward supplies. Wrong codes lead to mismatch notices and ITC blocking for your buyers.
  4. Filing nil returns late - Even businesses with zero sales must file nil GSTR-1. Many skip it thinking there is nothing to report, then face late fees under the nil-return slab.
  5. Not reconciling GSTR-1 with GSTR-3B - The tax liability declared in GSTR-1 must match what you pay in GSTR-3B. Mismatches are the most common trigger for GST audits.
  6. Missing the three-year window - Old pending GSTR-1 returns that cross the three-year mark from the original due date cannot be filed at all through the portal. This creates a permanent compliance gap that can surface during audits or loan applications.

How Compliance Radar Helps You Stay on Top of Outward Supply Deadlines

Managing outward supply reporting is not just about knowing the rules - it is about never missing a deadline and catching changes to filing requirements before they cost you money. GST notifications, circulars, and rule amendments are published across multiple government portals, and most businesses find out about changes only when a penalty notice arrives.

Compliance Radar addresses this by building a single timeline of every compliance obligation that applies to your business - including your GSTR-1 filing dates based on your turnover category. When a notification changes a due date, a threshold, or a reporting format, you get a real-time alert before it affects you.

Instead of tracking filing dates manually across the GST portal, the CBIC website, and your CA's calendar, you get one consolidated view. You can check your compliance posture free at complianceradar.in - describe your business once and see every applicable compliance, scheme, and deadline in one place.

Frequently Asked Questions

1. What is the meaning of outward supplies under GST?

Outward supplies, defined under Section 2(83) of the CGST Act, 2017, means all supplies of goods or services made by a taxable person in the course or furtherance of business - whether by sale, transfer, barter, exchange, licence, rental, lease, or disposal. In simple terms, every sale your business makes is an outward supply.

2. What is the due date for filing GSTR-1?

Monthly filers (turnover above Rs 5 crore) must file by the 11th of the following month. Quarterly filers under the QRMP scheme (turnover up to Rs 5 crore) must file by the 13th of the month following the quarter end.

3. What is the late fee for delayed GSTR-1 filing?

Under Section 47 of the CGST Act, the late fee is Rs 50 per day (Rs 25 CGST + Rs 25 SGST) for non-nil returns, with a maximum based on turnover: Rs 2,000 for turnover up to Rs 1.5 crore, Rs 5,000 for Rs 1.5 to Rs 5 crore, and Rs 10,000 for above Rs 5 crore. Nil returns attract Rs 20 per day, capped at Rs 500.

4. Can I correct mistakes in my filed GSTR-1?

Yes. You can file GSTR-1A to correct errors before filing GSTR-3B for the same period. If that window has passed, you can report amendments in Table 9 of a subsequent GSTR-1, subject to time limits.

5. What happens if I do not file GSTR-1 at all?

You face a late fee under Section 47, and if the non-filing involves intent to evade tax, a penalty under Section 122 of Rs 10,000 or the tax evaded, whichever is higher. Additionally, your buyers cannot claim ITC on purchases from you, which can damage business relationships. Returns older than three years from the original due date cannot be filed through the portal at all.

6. Do I need to file GSTR-1 if I had no sales in a month?

Yes. Every registered person required to file GSTR-1 must file a nil return even if there were no outward supplies during the period. Nil returns can be filed via SMS. The late fee for delayed nil returns is Rs 20 per day, capped at Rs 500.

7. What is the difference between outward supplies and inward supplies?

Outward supplies are sales your business makes. Inward supplies are purchases your business receives. GSTR-1 reports outward supplies. The concept of inward supplies was originally linked to GSTR-2, but the two-way return filing mechanism was suspended, and inward supplies are now auto-populated in GSTR-2B based on your suppliers' GSTR-1 filings.

Conclusion

Outward supplies reporting is the backbone of your GST compliance. Every sale you make must be reported in GSTR-1 with the correct details, in the right tables, and by the right deadline. The penalties for getting it wrong are specific and enforced: Rs 50 per day under Section 47 for late filing, up to Rs 10,000 or the tax evaded under Section 122 for incorrect reporting, and 18% interest per annum under Section 50 on unpaid tax.

The rules are not complicated, but they are unforgiving. A missed deadline, a wrong HSN code, or an unreported advance can trigger a chain of notices, penalties, and ITC blocks that cost far more than the time it takes to file correctly.

If you are unsure which compliances apply to your business - GST or otherwise - check your compliance posture free at complianceradar.in. Describe your business once and get a complete timeline of every applicable compliance, government scheme, and deadline, with real-time alerts when regulations change.