GST Monthly Filing
GSTR-1 & GSTR-3B, every month, on time
Dedicated accountant files your GSTR-1 and GSTR-3B every month with ITC reconciliation against GSTR-2B — 99% on-time record.
What's included
- GSTR-1 & GSTR-3B filing
- GSTR-2B ITC reconciliation
- Late-fee prevention alerts
- Dedicated accountant on WhatsApp
Understanding GST Monthly Filing
Every regular GST-registered business must file two returns for each tax period: GSTR-1, the statement of outward supplies due on the 11th of the following month, and GSTR-3B, the summary return with tax payment due on the 20th. Under the QRMP scheme, businesses with turnover up to ₹5 crore may file quarterly instead, using the Invoice Furnishing Facility by the 13th and paying monthly via PMT-06, with GSTR-3B due on the 22nd or 24th depending on the state. Filing is mandatory even for months with zero sales.
The harder part of monthly compliance is input tax credit. Since Section 16(2)(aa) of the CGST Act took effect, you can claim credit only for invoices your suppliers have actually uploaded, as reflected in your auto-drafted GSTR-2B. Claiming credit that is not in 2B invites automated mismatch notices in Form DRC-01B and DRC-01C, and blocked credit under Rule 86A. Careful monthly reconciliation of your purchase register against GSTR-2B is now the difference between smooth cash flow and locked working capital.
Our monthly filing service handles the full cycle: we prepare and file GSTR-1 from your sales data, reconcile every purchase invoice against GSTR-2B, follow up on suppliers who have not uploaded invoices, compute your net liability and file GSTR-3B with payment on time. At ₹999 per month you get a fixed, predictable compliance cost and a dedicated point of contact who knows your books.
Who needs this?
Regular taxpayers with turnover above ₹5 crore
You are outside the QRMP scheme, so GSTR-1 by the 11th and GSTR-3B by the 20th are compulsory every single month, and e-invoicing obligations apply to your B2B supplies.
Businesses with significant input tax credit
Traders, manufacturers and service firms with large purchase volumes need monthly GSTR-2B reconciliation to catch missing supplier invoices while there is still time to chase them.
E-commerce sellers on multiple marketplaces
Marketplace sales come with TCS credits, commission invoices and returns that must be matched against portal data every month, which is tedious to do manually across Amazon, Flipkart and others.
Startups and small firms without an in-house accountant
If nobody on your team tracks GST due dates, notices and rule changes, outsourcing the monthly cycle is cheaper than one late fee plus interest, let alone a mismatch notice.
QRMP taxpayers who still want monthly discipline
Even under the quarterly scheme you must deposit tax monthly through PMT-06 by the 25th, and uploading B2B invoices monthly via IFF keeps your buyers' credit flowing without complaints.
Businesses that received GST notices before
If you have faced DRC-01B/01C intimations or ITC mismatch queries, professionally reconciled filings each month prevent a repeat and build a clean record for future scrutiny.
When this is NOT the right fit
| Your situation | What applies instead |
|---|---|
| ✕You are registered under the composition scheme | Composition dealers do not file GSTR-1 or GSTR-3B. They pay tax quarterly via Form CMP-08 and file one annual return in GSTR-4, which is a different, simpler engagement. |
| ✕Your GSTIN is cancelled or suspended | Return filing stops from the effective date of cancellation; instead you need a final return in GSTR-10 within three months, or revocation proceedings if the cancellation was departmental. |
| ✕You are an ISD, TDS or TCS deductor only | Input Service Distributors file GSTR-6, TDS deductors file GSTR-7 and e-commerce operators file GSTR-8. These are specialised returns priced and handled separately from regular monthly filing. |
Not sure which applies to you? Message us — we'll point you to the right service in minutes, free.
Documents you'll need — and why
Sales register or invoice list for the month
Every outward invoice with GSTIN of buyer, taxable value, rate and place of supply feeds directly into GSTR-1. An Excel export from your billing software or Tally works fine.
Purchase register with supplier invoices
We match each purchase invoice against GSTR-2B to determine exactly how much input tax credit you can lawfully claim this month and which suppliers to chase.
Credit and debit notes issued
Sales returns, post-sale discounts and price revisions must be reported in GSTR-1 in the correct table so your output liability adjusts downward legitimately.
E-commerce sales and TCS reports
Marketplace monthly reports let us reconcile TCS credited in GSTR-2B and report supplies made through operators in the dedicated GSTR-1 tables.
Bank statement for the month
A quick scan helps us catch unbilled receipts, advances against services (taxable on receipt) and expense invoices you may have missed recording.
GST portal login credentials
Needed to download GSTR-2B, file returns, verify cash and credit ledger balances and respond to any intimation that lands on the portal during the month.
Details of RCM-liable expenses
Payments like freight to a GTA, advocate fees or imports of services attract tax under reverse charge that must be paid in cash and then claimed as credit.
How it works, step by step
- 1
Data handover
By the 5thBy the 5th of each month you share the sales and purchase data for the previous month through email, shared drive or direct access to your accounting software.
- 2
GSTR-1 preparation and filing
By the 11thWe classify invoices into B2B, B2C, exports and credit notes, validate GSTINs and HSN summaries, share a draft for your confirmation and file GSTR-1 before the due date.
- 3
GSTR-2B reconciliation
14th-16thWhen GSTR-2B generates on the 14th, we match it line by line against your purchase register, flag missing or mismatched invoices and send suppliers a follow-up list.
- 4
Liability computation and GSTR-3B filing
17th-20thWe compute output tax, eligible ITC and reverse charge liability, tell you the exact cash payable, generate the challan and file GSTR-3B once payment clears.
- 5
Monthly compliance report
By the 22ndYou receive filed return copies, a summary of tax paid, ITC claimed versus available, pending supplier invoices and any portal notices needing attention.
Due dates to know
GSTR-1 (monthly filers)
11th of the following month
Buyers see your invoices in their GSTR-2B only if you file on time.
IFF under QRMP
13th of the month following months 1 and 2 of the quarter
Optional facility to push B2B invoices monthly; quarterly GSTR-1 covers the rest.
GSTR-3B (monthly filers)
20th of the following month
Tax must be paid before or with filing; the return cannot be filed without payment.
GSTR-3B (QRMP)
22nd or 24th of the month after the quarter
22nd for southern and western states, 24th for northern and eastern states.
PMT-06 monthly payment (QRMP)
25th of the following month
35% fixed-sum method or self-assessment for months 1 and 2 of each quarter.
What non-compliance costs
Late filing of GSTR-1 or GSTR-3B
Late fee of ₹50 per day (₹25 CGST plus ₹25 SGST), reduced to ₹20 per day for nil returns, capped between ₹500 and ₹10,000 per return depending on turnover.
Late payment of tax
Interest at 18% per annum under Section 50, calculated day-wise on the net cash liability from the due date until payment.
Excess ITC claimed beyond GSTR-2B
Automated intimation in Form DRC-01C; unexplained excess must be reversed with 18% interest, and wilful wrong availment attracts penalty under Section 73 or 74 of up to 100% of the tax.
Not filing returns for six consecutive months
The officer can cancel your GSTIN under Section 29(2)(c). Non-filing for two consecutive periods also blocks GSTR-1 filing and e-way bill generation, freezing your dispatches.
Why doing this right pays off
Never miss a due date
A fixed monthly rhythm with reminders on the 5th, filings by the 11th and 20th, and confirmations after each submission removes the mental load of tracking deadlines.
Maximum lawful input tax credit
Line-by-line GSTR-2B reconciliation ensures you claim every rupee of eligible credit and identify defaulting suppliers early, protecting working capital month after month.
Fixed, predictable cost
₹999 per month covers both returns, reconciliation and reporting. That is less than one day of a part-time accountant and far less than one late-fee-plus-interest incident.
Clean data for annual returns and audits
Because every month is reconciled as it happens, your GSTR-9 preparation, bank loan documentation and any departmental scrutiny become dramatically simpler.
Notice prevention and early warning
We monitor your portal dashboard for intimations like DRC-01B and respond within statutory timelines, so small mismatches never grow into demand orders.
Common DIY mistakes we see
- Claiming input tax credit from the purchase register without checking GSTR-2B, which triggers automatic mismatch notices and interest on the excess.
- Treating a zero-sales month as a no-filing month; nil returns are compulsory and each skipped one accrues ₹20 per day in late fees.
- Forgetting reverse charge liabilities on freight, legal fees and import of services, which must be paid in cash and cannot be set off against ITC.
- Reporting B2B invoices with wrong GSTINs or in the B2C table, so buyers never see the credit and raise disputes months later.
- Missing credit notes for sales returns, which inflates output tax paid and quietly overpays the government every month.
Frequently asked questions
Preparation and filing of GSTR-1 and GSTR-3B (or IFF and PMT-06 under QRMP), full GSTR-2B reconciliation against your purchase register, a supplier follow-up list, challan generation and a monthly compliance summary. Notices arising from periods we filed are handled at no extra charge.
Not sure if this is the right service?
Message us on WhatsApp — a real expert replies, usually within minutes.
All-inclusive professional fee. Government fees (if any) extra at actuals.
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Next GSTR-3B due date
20 July 2026 — book now and beat the last-minute rush.