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GST Return Due Date Calendar 2026 – GSTR-1, GSTR-3B & CMP-08

Stay compliant with Central Board of Indirect Taxes and Customs (CBIC) statutory filing deadlines to avoid interest at 18% p.a. and daily late fee penalties.

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GST Return Due Date Calendar 2026 – GSTR-1, GSTR-3B & CMP-08

Holidays, long weekends, leave opportunities and statutory compliance due dates — all in one place.

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Thursday, 27 August 2026

Is today a holiday?❌ No Working Day
Next HolidayIn 18 Days
Ganesh Chaturthi
2026-09-14
Next ComplianceIn 4 Days
Quarterly TDS Certificate Issue (Form 16A)
2026-08-31
This Week Overview
🎉 0 Holidays
🔴 1 Compliance Deadlines
Year:
State:
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August 2026

August
SUN
MON
TUE
WED
THU
FRI
SAT
1
2
3
4
5
6
71 event
🔴 Monthly TDS / TCS Payment Deposit
8
9
101 event
🔴 GSTR-7 & GSTR-8 Return Filing
111 event
🔴 GSTR-1 Outward Supply Return (Monthly)
12
131 event
🔴 IFF (Invoice Furnishing Facility) – QRMP Scheme
14
151 event
🇮🇳 Independence Day
16
17
18
19
201 event
🔴 GSTR-3B Summary Return & Tax Payment
21
22
23
24
25
261 event
🇮🇳 Onam (Thiruvonam)
27
28
29
30
311 event
🔴 Quarterly TDS Certificate Issue (Form 16A)
National Holiday (🇮🇳) State Holiday (🗺️) Bank Holiday (🏦) Compliance Deadline (🔴)

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Key Dates Overview (2026)

Event NameDate & Day
GSTR-7 & GSTR-8 (TDS/TCS)10th of every month
GSTR-1 Outward Supply11th of every month
IFF (QRMP Scheme)13th of every month
GSTR-3B Summary Return20th of every month
CMP-08 (Composition Scheme)18th following quarter end

GST Late Fee & Interest Rules 2026

Filing GSTR-3B after the 20th attracts a mandatory late fee of ₹50 per day (₹20 per day for Nil returns) capped at statutory limits, plus 18% per annum interest on net cash tax paid.

Failing to file GSTR-1 blocks generation of GSTR-1 for subsequent tax periods on the GST portal.

Frequently Asked Questions

What is the penalty for late filing of GSTR-3B?

Late fee is ₹50 per day (₹25 CGST + ₹25 SGST) for tax-payable returns, and ₹20 per day (₹10 CGST + ₹10 SGST) for Nil returns, along with 18% p.a. interest.