A Practical Guide to GST Compliance Calendar Management
GST compliance is not one deadline — it is a lattice of overlapping deadlines: GSTR-1 by the 11th, GSTR-3B by the 20th (or the staggered 22nd/24th for QRMP states), CMP-08 by the 18th of the month after quarter-end for Composition dealers, GSTR-9/9C by 31 December, ITC-04 for job-work goods, e-invoicing IRN generation before dispatch, e-way bill validity windows, TDS/TCS returns under GSTR-7/GSTR-8, LUT renewal every financial year for exporters, and RCM self-invoicing timelines — all running in parallel, each with its own interest and late-fee exposure. At PNPC Global, we have run GST compliance calendars for businesses across Chennai, Bangalore, Hyderabad, and Dubai since GST's 2017 rollout. We do not hand you a spreadsheet and wish you luck.
What This Actually Covers
GST Compliance Calendar Management is the ongoing professional service of tracking, prioritising, and executing every statutory due date that applies to a taxpayer's GST registration — GSTR-1 (outward supply statement), GSTR-3B (summary return and tax payment), GSTR-9 and GSTR-9C (annual return and reconciliation statement), CMP-08 (Composition Scheme quarterly statement-cum-payment), GSTR-4 (Composition annual return), GSTR-7/GSTR-8 (TDS/TCS deductor-collector returns), ITC-04 (job-work goods movement statement), LUT (Letter of Undertaking renewal for zero-rated exporters), e-invoicing IRN generation timelines, and e-way bill validity periods. Under the CGST Act 2017 and the CGST Rules 2017, each of these has its own section, its own prescribed form, its own due date, and its own late-fee and interest exposure under Sections 47 and 50 of the Act. A business with GST registrations in multiple states, a mix of regular and Composition-scheme entities in the same group, or import/export activity requiring LUT renewal is effectively running five to eight parallel compliance tracks — and a single missed date on any one of them can block downstream events for the business or its customers.
For the full scope, current process and what PNPC includes, see the dedicated GST Compliance Calendar Management service page.
Signs This Applies to You
- Businesses with GST registrations in more than one state — each GSTIN runs its own return cycle, and cross-state due date and reconciliation tracking on a spreadsheet becomes error-prone past two or three states
- Composition Scheme taxpayers who must track CMP-08 quarterly and GSTR-4 annually — an entirely separate calendar from regular GSTR-1/3B filers, easy to conflate if the business also has a regular-scheme group entity
- Exporters and SEZ suppliers who must renew their LUT (Letter of Undertaking) every financial year before making the first zero-rated supply of that year — a single missed renewal forces IGST payment upfront with refund claims instead of duty-free export
- Businesses under QRMP (Quarterly Return, Monthly Payment) — juggling monthly PMT-06 tax payment, optional IFF filing for the first two months of the quarter, and quarterly GSTR-1/3B, which is a different due-date rhythm from monthly filers
What This Doesn't Cover
- A single-GSTIN business with very low transaction volume and a simple, unchanging monthly GSTR-1/3B cycle may manage with a basic reminder system and periodic CA review rather than a full dedicated calendar engagement — though most such businesses still benefit from at least an annual health check
- A dormant GSTIN with no outward supplies in a period still needs a nil return filed on time — but if the business is genuinely winding down, cancellation of registration (rather than ongoing calendar management) may be the more appropriate service
- A business already running a mature, well-integrated ERP-driven compliance workflow with its own internal tax team may only need PNPC for periodic review and exception handling rather than full calendar ownership
Questions We're Actually Asked
What exactly does 'GST Compliance Calendar Management' mean as a service — is it just reminders?
No — reminders are the visible output, not the service itself. The underlying work is mapping every return type that actually applies to your specific GSTIN(s) and filing frequency, reconciling GSTR-2B against your purchase register before each GSTR-3B (not after), tracking CBIC notifications that shift due dates, and maintaining a single calendar that covers periodic returns, annual returns, export LUT renewal, job-work ITC-04, and any notice-response deadlines together — because they compete for the same attention and are easy to miss when tracked in separate systems.
What are the main GST return types a typical business needs to track?
GSTR-1 (outward supply statement, monthly or quarterly under QRMP), GSTR-3B (summary return and tax payment, monthly or per QRMP schedule), CMP-08 (quarterly statement-cum-payment for Composition Scheme taxpayers), GSTR-4 (annual return for Composition taxpayers), GSTR-9 and GSTR-9C (annual return and reconciliation statement, GSTR-9C applicable above a CBIC-notified turnover threshold), ITC-04 (job-work goods movement, half-yearly or annual depending on turnover), and GSTR-7/GSTR-8 (TDS/TCS returns for specified deductors and e-commerce operators). Exporters additionally track annual LUT renewal.
What is the due date for GSTR-1 and does it differ for QRMP filers?
Monthly GSTR-1 filers must file by the 11th of the following month. QRMP (Quarterly Return, Monthly Payment) filers file GSTR-1 quarterly, by the 13th of the month following the quarter, but can optionally use the Invoice Furnishing Facility (IFF) to upload B2B invoices for the first two months of the quarter so recipients see the credit sooner rather than waiting for the full quarterly filing.
Getting This Right From the Start
GST compliance does not fail on the big, obvious deadline — it fails on the ITC-04 nobody remembered, the LUT that lapsed quietly on 1 April, or the GSTR-2B mismatch that sat unreconciled for six months before it became a notice. Talk to PNPC Global before that happens, not after.
PNPC Global has advised Chennai, Bangalore and Hyderabad businesses since 1986. Explore the full GST practice for related services, or go straight to the GST Compliance Calendar Management page for specifics.
Specific rates, fees, thresholds and deadlines are set by the relevant authority and change over time — this article deliberately does not quote figures that could go stale. Confirm current numbers directly with PNPC or the official source before you act.