GSTR-3B decides monthly tax payment
The return summarises outward tax, input tax credit and net payment. It should be reconciled with GSTR-1, GSTR-2B and books.
Situations this page is built for
- Monthly GST return is due.
- ITC needs checking before claim.
- Tax payment challan support is required.
- Sales and purchase data changed after GSTR-1.
- Late returns need interest and fee calculation.
Documents and details usually required
- GSTIN and GST portal access, if already registered.
- PAN, Aadhaar, business registration and authorised signatory details.
- Sales invoices, purchase invoices, debit/credit notes and expense bills.
- GSTR-1, GSTR-3B, 2A/2B and electronic ledger downloads.
- Bank statements, ecommerce reports, e-way bills and e-invoice data where applicable.
- Notices, orders or cancellation documents, if any.
Practical process before hiring
Map GST requirement
Identify whether the work is registration, filing, reconciliation, notice reply, cancellation or advisory.
Check return data
Compare sales, purchases, ITC, tax paid and portal data period-wise.
Prepare workings
Create return summaries, reconciliations and supporting attachments before filing or replying.
File and monitor
Submit through the portal and track acknowledgements, ledgers and future compliance dates.
What to expect in India
| Work type | Typical price range | Timeline |
|---|---|---|
| GST registration or simple filing | Rs. 1,000 - Rs. 5,000 | 1-5 days |
| Monthly GST with reconciliation | Rs. 2,000 - Rs. 15,000 per month | Monthly |
| Notice/cancellation/complex support | Rs. 5,000 - Rs. 50,000+ | Case-specific |
Prices vary by document readiness, urgency, city, professional experience and whether previous periods need cleanup.
Common red flags and mistakes
- Claiming ITC without checking GSTR-2B.
- Filing GSTR-1 and GSTR-3B without reconciling turnover.
- Ignoring late fee and interest impact.
- Responding to notices without attachments.
- Waiting until the due date to arrange invoices.
What to mention when you post
- GSTIN status and business type.
- Monthly invoice count and pending return periods.
- Whether ecommerce, e-way bill or e-invoicing applies.
- Notice reference number and deadline, if any.
- Whether accounting data is ready or needs cleanup.
How to choose the right professional
- Choose someone who asks for return data before quoting.
- Check experience with your industry and transaction volume.
- Ask whether reconciliation, challan support and amendments are included.
- For notices, ask for point-wise reply with evidence.
- Clarify monthly calendar and document collection process.
Extra checks before you finalise
- Ask the professional to separate regular outward supplies, exempt supplies, reverse charge, advances and credit notes before return preparation.
- For ITC work, insist on GSTR-2B based eligibility review rather than only purchase register matching.
- If there are delayed returns, confirm the late fee, interest and cash ledger impact before any filing is submitted.
Questions people ask before hiring
Is GSTR-3B monthly?
Filing frequency depends on taxpayer scheme and rules.
Can I claim all purchase GST as ITC?
No, eligibility and GSTR-2B matching should be checked.
What if tax is paid late?
Interest and late fee may apply.
Should GSTR-1 and 3B match?
They should be reconcilable even if timing differences exist.