What GST returns and rules does GSTBuddies support?

GSTBuddies audits GSTR-1, 2A, 2B, 3B, 9 and 9C. Checks include Rule 37 (180-day ITC reversal), Rule 42/43 common-credit reversal advisories, Rule 86B, Section 16(4) ITC time-bar, Section 50 interest, Section 47 late fees, reverse-charge (RCM) checks, the annual Table 8 ITC reconciliation and the three-way GSTR-1 vs 3B vs 9 reconciliation. Every figure is cited to the CGST Act and Rules. Section 17(5) blocked credits depend on what each expense was, which a GST return does not carry, so that review stays with your books.

What file formats can I upload?

PDF, Excel, JSON and ZIP. Upload GSTR PDFs from the GST Portal, Excel ledgers from Tally, Busy or any party ledger (.xlsx/.xls), JSON exports for GSTR-2A/2B/3B/9/9C, or the portal's ZIP downloads — GSTBuddies extracts and classifies them automatically.

Is GSTBuddies free to try?

Yes. Sign up to get free credits every month, no credit card required, and run GST compliance checks to see the results before you buy.

Yes. GSTBuddies uses AES-256 encryption on AWS infrastructure and never shares your data. Uploaded files are processed and deleted after 7 days.

Deadlines15 July 2026

GST compliance calendar FY 2026-27: every filing due date

One place to see every GST return and its statutory due date for the financial year — monthly and quarterly (QRMP) filers, composition dealers, and the GSTR-9/9C annual deadline. Dates are the standing statutory dates; the government occasionally extends them by notification.

Monthly filers

If you file monthly, each return is due in the month after the tax period:

Return	What it covers	Due date
GSTR-1	Outward supplies	11th of the next month
GSTR-3B	Summary return & tax payment	20th of the next month
GSTR-5	Non-resident taxable person	13th of the next month
GSTR-6	Input Service Distributor	13th of the next month
GSTR-7	TDS deductor	10th of the next month
GSTR-8	TCS by e-commerce operator	10th of the next month

QRMP (quarterly) filers

Taxpayers with aggregate turnover up to ₹5 crore can opt for the Quarterly Return, Monthly Payment scheme. Returns are quarterly, but tax is still paid every month:

Filing	Frequency	Due date
IFF (optional B2B upload)	Months 1 & 2 of the quarter	13th of the next month
PMT-06 (tax payment)	Months 1 & 2 of the quarter	25th of the next month
GSTR-1 (quarterly)	Each quarter	13th of the month after the quarter
GSTR-3B — Category X states	Each quarter	22nd of the month after the quarter
GSTR-3B — Category Y states	Each quarter	24th of the month after the quarter

Category X vs Y: GSTR-3B under QRMP has two due dates depending on your principal place of business. Category X (22nd) covers most southern and western states/UTs; Category Y (24th) covers most northern and eastern states/UTs.

Composition dealers

Filing	Frequency	Due date
CMP-08 (statement & tax)	Quarterly	18th of the month after the quarter
GSTR-4 (annual return)	Yearly	30th June following the financial year

The annual deadline: GSTR-9 & GSTR-9C

The big one to plan for. The annual return and reconciliation statement for FY 2025-26 are due by 31 December 2026:

GSTR-9 — annual return. Optional if aggregate annual turnover is up to ₹2 crore; otherwise mandatory.
GSTR-9C — self-certified reconciliation statement. Required if aggregate annual turnover exceeds ₹5 crore.

Filing after 31 December attracts a late fee under Section 47(2) — see our guide on the GSTR-9 late-fee turnover slabs and what GSTR-9C reconciles.

Late even by a day? Late fees under Section 47 and interest under Section 50 both run per day of delay. Missing a deadline is rarely just a compliance flag — it has a rupee cost.

Never miss one again

GSTBuddies reads the actual ARN/filing dates from your uploaded returns, flags anything filed late, and computes the exact late fee and interest per head — cited to the CGST Act. Explore the full GST compliance suite or start with 8 free credits every month.

FAQ

When is GSTR-3B due for monthly filers?

The 20th of the month following the tax period.

When is the GST annual return for FY 2025-26 due?

GSTR-9 and GSTR-9C for FY 2025-26 are due by 31 December 2026.

What are the two GSTR-3B due dates under QRMP?

The 22nd (Category X states/UTs) or the 24th (Category Y states/UTs) of the month after the quarter.