Quarterly GSTR-1 Due on the 13th: Deadline for Small Taxpayers Under the QRMP Scheme

The trading week opening on Thursday, 8 October 2026 is light on marquee corporate results but heavy on compliance clocks. The single date every small business should ring-fence is Tuesday, 13 October 2026, the due date for the quarterly Form GSTR-1 covering the July-to-September 2026 quarter under the Quarterly Return Monthly Payment (QRMP) scheme. Miss it and your buyers cannot see their input tax credit (ITC) on time, which is why this one filing matters well beyond your own books.

This watchlist sets out the statutory deadlines falling between 8 and 24 October 2026, the one market event that reset borrowing costs this week, and the primary-market listing that opens on that same 13 October date. Every figure below is traced to a primary source; where a number could not be verified against the official record, it has been left out.

Statutory Deadlines

The QRMP scheme lets registered taxpayers with aggregate turnover up to Rs 5 crore file Form GSTR-1 once a quarter instead of every month. Per the official GST portal user guide, the quarterly GSTR-1 falls due on "the 13th day of the month succeeding the end of every quarter". For the July-to-September 2026 quarter that lands on Tuesday, 13 October 2026. The statutory home of the return is Section 37 of the Central Goods and Services Tax Act, 2017, read with Rule 59 of the CGST Rules, 2017, which fix the form and the filing window.

The 13th is not the only clock running in the first fortnight of October 2026. Deductors, e-commerce operators and monthly filers all have earlier dates, and composition dealers a later one. The table below consolidates the GST return calendar for the period, so that a QRMP filer preparing the 13 October return can see what else is owed around it.

Two of those dates, 10 and 11 October 2026, fall on a Saturday and a Sunday respectively. GST law carries no automatic extension for a due date landing on a weekend unless the government notifies one, so plan to file by the stated date rather than assume a grace day. The 13 October anchor itself is a working Tuesday, with no such ambiguity.

The reason the quarterly GSTR-1 deserves top billing is its knock-on effect. GSTR-1 reports your outward supplies invoice by invoice, and those invoices then populate each buyer's auto-drafted GSTR-2B. As the GST portal guidance notes for quarterly filers, a delay blocks the recipient's input tax credit: your customer cannot claim the GST they paid you until your return is filed and the invoice appears on their side. For a supplier whose buyers are themselves businesses, filing late in the 13 October 2026 cycle is not a private penalty but a cash-flow problem you hand to your customers, straining their working capital.

A late GSTR-1 also attracts a late fee under Section 47 of the CGST Act, 2017, and persistent non-filing can bar you from furnishing the next period's return. The income-tax calendar runs alongside: deductors who cut TDS must deposit September 2026 tax by early October and file quarterly statements for the July-September quarter in the second half of the month, while individuals estimating liability should keep the advance-tax instalment calendar of the Income-tax Act in view, as published at incometax.gov.in.

Market Events

Borrowing costs reset this week. In its 5-to-7 October 2026 review, the Reserve Bank of India's Monetary Policy Committee (MPC) raised the repo rate by 25 basis points to 5.50% and shifted to a tightening bias, as set out in Oquilia's report of the decision and the MPC resolution published at rbi.org.in. The move reverses four consecutive pauses that had held the repo rate at 5.25% since the unanimous hold of 5 August 2026.

The reset flows through to households with a lag. External benchmark lending rate (EBLR) linked floating-rate loans re-price within roughly three months of a repo change, so borrowers on such loans should expect their equated monthly instalments to edge up before the end of the 2026 calendar year off the 25 basis-point rise. Savers get the mirror image, with fresh fixed-deposit and small-savings rates the next variable to watch at the quarterly notification that governs rates such as the 7.1% Public Provident Fund and 8.2% Senior Citizens Savings Scheme returns on Oquilia's rate record.

The primary market gives 13 October 2026 a second reason to matter. Per Oquilia's coverage, HD Fire Protect has set a price band of Rs 258 to Rs 271 per share for a Rs 712 crore offer that opens on 13 October 2026. That puts a new-issue subscription window and a GST deadline on the very same Tuesday, a scheduling clash worth noting if you run a business and also track the IPO pipeline. Public issues are vetted by the market regulator, whose observations and disclosure framework sit at sebi.gov.in.

Earnings

Under this desk's zero-hallucination policy, we list only company results that are confirmed on an official filing or exchange calendar. As of 7 October 2026, no large-cap quarterly results for the week of 8 October 2026 were confirmed in our verified calendar, so none are reported here. The Q2 FY2026-27 reporting season for most index constituents typically gathers pace in the second half of October, and we will not publish an unverified earnings date to fill the slot.

The one dated corporate capital-markets event we can confirm for the period is the HD Fire Protect issue, which opens on 13 October 2026 inside its Rs 258 to Rs 271 band for a Rs 712 crore raise. For investors weighing whether to deploy a single sum into a new issue or stagger entries into the secondary market, the arithmetic of both routes is worth modelling before listing day: our lump-sum calculator and step-up SIP calculator run each scenario, and a disciplined monthly plan can be sized with the SIP calculator.

Tax treatment should frame any listing-day decision. On Oquilia's rate record, equity sold within twelve months is taxed as short-term capital gains at 20%, and gains booked after twelve months are long-term, taxed at 12.5% on the amount above the Rs 1.25 lakh annual exemption. A quick exit on a strong debut is therefore taxed differently from a hold of a year or more, and that gap, not the headline listing pop, is what decides the after-tax return. The consolidated table below lists everything dated on the watch window.

FAQ

What is the due date for quarterly GSTR-1 under QRMP for the July-September 2026 quarter?

It is Tuesday, 13 October 2026. Under the QRMP scheme the quarterly GSTR-1 is due on the 13th day of the month succeeding the end of the quarter, per the GST portal user guide, so a July-to-September quarter is reported by 13 October. The same rule put the January-to-March quarter return on 13 April in earlier years.

Who can opt for the QRMP scheme?

Registered taxpayers with aggregate annual turnover up to Rs 5 crore may opt into QRMP, filing GSTR-1 and GSTR-3B quarterly while paying tax monthly. The scheme operates under Section 39 of the CGST Act, 2017 and the related rules; taxpayers above the Rs 5 crore threshold file GSTR-1 monthly, due on the 11th, as shown in the calendar above.

What happens if I miss the GSTR-1 deadline?

Two things. First, a late fee applies under Section 47 of the CGST Act, 2017. Second, and often costlier to your relationships, a delayed GSTR-1 holds up your buyers' input tax credit: their auto-drafted GSTR-2B will not reflect your invoices until you file, so they cannot claim the GST they paid you for that period. For the 13 October 2026 cycle, that is a cash-flow hit you pass to your customers.

Did the RBI change interest rates this week?

Yes. In its 5-to-7 October 2026 review the Monetary Policy Committee raised the repo rate by 25 basis points to 5.50% and moved to a tightening bias, reversing the 5.25% level held since 5 August 2026. The resolution is published at rbi.org.in, and floating EBLR-linked loans typically re-price within about three months of such a change.

Is there anything to watch on 13 October 2026 besides the GST deadline?

Yes. The HD Fire Protect public issue opens on 13 October 2026 with a price band of Rs 258 to Rs 271 per share for a Rs 712 crore offer, per Oquilia's coverage of the filing. That places a subscription window and a GST return deadline on the same Tuesday.

Does filing GSTR-1 mean I have paid my GST?

No. GSTR-1 is a statement of outward supplies; it reports your sales invoice by invoice but does not discharge your tax. Payment is made through GSTR-3B, due on 20 October 2026 for monthly filers and on 22 or 24 October 2026 for QRMP filers depending on the state category. Filing one without the other leaves your compliance incomplete.

Are any corporate earnings confirmed for the week of 8 October 2026?

Not on our verified calendar as of 7 October 2026. Because this is Your Money Your Life financial content, we do not publish an earnings date we cannot trace to an official filing or exchange schedule. The Q2 FY2026-27 season for most large-cap names generally builds through the second half of October 2026.