GST Compliance for Mumbai Businesses
Mumbai's GST filers are unusually varied: importers clearing goods through JNPT and Mumbai port, wholesale traders shipping across India, e-commerce sellers using Bhiwandi warehouses, and service firms billing clients abroad. Each has its own risk area: import credit, inter-state e-way bills, marketplace TCS or export refunds. Missing them shows up as mismatches and notices months later.
CompanyFX files your returns every month after reconciling your books with the GST portal, so what you report matches what the department sees.
What We File
- GSTR-1: outward supplies, monthly (11th) or quarterly under QRMP
- GSTR-3B: summary return and tax payment, monthly (20th) or quarterly (22nd for Maharashtra)
- GSTR-9 and 9C: annual return above ₹2 crore turnover, and reconciliation above ₹5 crore
- LUT: annual Letter of Undertaking for exporters
- CMP-08 and GSTR-4: for composition taxpayers
Monthly Reconciliations
- Accept, reject or hold supplier invoices on IMS before GSTR-2B is generated
- Match purchase register with GSTR-2B and follow up missing supplier invoices
- Match IGST on imports with bills of entry
- Match marketplace TCS with your sales
- Check e-invoices and e-way bills against reported sales
Mumbai-Specific Situations
- Warehouses in Bhiwandi or Thane: added as additional places of business on your Maharashtra GSTIN, with stock and e-way bills tracked per location
- Service exporters: zero-rated invoices under LUT and refunds of unutilised credit
- Branches outside Maharashtra: separate GSTINs and cross-charge between them
Notices and Changes
If you receive an ASMT-10, DRC-01 or other notice, read how to reply to a GST notice or send it to us. The GST Council's 57th meeting has recommended major process changes, including late fee relief for small taxpayers and a minimum ₹10,000 threshold for notices, which will apply once notified. We track these and update your filings when they take effect.
Serving Clients Across Mumbai
Kalbadevi, Masjid Bunder, Fort, Lower Parel, Andheri MIDC, Marol, Saki Naka, Powai, Goregaon, Malad, Bhiwandi, Thane, Turbhe and Vashi, all handled online.
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Fixed monthly fee by volume
- GSTR-1 and GSTR-3B filing
- IMS and GSTR-2B reconciliation
- E-invoice and e-way bill checks
- GSTR-9 / 9C annual return
- Replies to notices
Frequently Asked Questions
What are the GST return due dates for a Mumbai business?
Monthly filers file GSTR-1 by the 11th and GSTR-3B by the 20th of the next month. Small businesses under the QRMP scheme file quarterly, and for Maharashtra the quarterly GSTR-3B is due by the 22nd of the month after the quarter, with monthly tax paid through challan.
Who has to file the GST annual return?
GSTR-9 is mandatory for taxpayers with aggregate turnover above ₹2 crore and optional below that. Taxpayers with turnover above ₹5 crore also file the self-certified reconciliation statement GSTR-9C.
What is IMS and why does it matter?
The Invoice Management System on the GST portal lets you accept, reject or keep pending the invoices your suppliers upload, before they flow into your GSTR-2B. Acting on IMS every month keeps your input tax credit accurate and avoids mismatch notices.
How is IGST on imports claimed?
IGST paid on imports at customs appears in your GSTR-2B through the bill of entry data. We match it with your import records each month so the credit is claimed in the right period.
Are GST late fees changing?
The GST Council in its 57th meeting on 8 October 2026 recommended waiving the late fee for taxpayers with turnover up to ₹5 crore who file within the month the return falls due. This is a recommendation and applies only once notified, so filing on time is still the rule.
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