GST tools
Calculators and checkers for GST returns, late fees and input tax credit. Each one is updated when CBIC notifies a change.
Returns and payment come first: late fees under Section 47 with turnover-based caps plus 18% interest, then output tax by rate with the Rule 88A set-off order so you know the cash to pay. GSTR-1 vs GSTR-3B comparison flags the mismatches that trigger a DRC-01B intimation.
Input tax credit comes second: eligibility under Sections 16 and 17(5), reverse charge on notified goods and services, and e-invoice and e-way bill checks by turnover and consignment value. Registration thresholds and the composition scheme sit alongside export refunds for new businesses.
GST late fee
Late fee under Section 47 with turnover-based caps, plus 18% interest, for GSTR-1, 3B, 4 and 9.
₹50/day + 18% interest
GSTR-2B reconciliation
Match your purchase register with GSTR-2B. Upload CSVs — files never leave your browser.
Runs in your browser
ITC eligibility
Check Section 16 conditions and Section 17(5) blocked credits for any purchase.
ITC reversal
Rule 42 common-credit reversal for exempt supplies, and Rule 37 reversal for unpaid invoices after 180 days.
GST liability
Output tax by rate, ITC set-off in the order Rule 88A requires, and the cash you need to pay.
GSTR-1 vs 3B
Compare month-wise liability and flag differences that trigger a DRC-01B notice.
E-invoice
Find out whether e-invoicing applies, which documents are covered, and the 30-day reporting rule.
E-way bill
Check whether a consignment needs an e-way bill and how long it stays valid.
Composition scheme
Check eligibility, the turnover limit for your state and tax payable under composition.
GST registration
Thresholds by state (₹40/20/10 lakh) and the cases where registration is compulsory.
Export refund
Compare exporting under LUT (ITC refund, Rule 89(4)) with paying IGST and claiming a refund.
Reverse charge
Search the notified goods and services where the recipient pays GST.
HSN/SAC lookup
Search HSN chapters, common headings and SAC service codes.
GSTIN validator
Check a GSTIN's format and checksum, and see its state and PAN.
Frequently asked questions
Which GST tool should I use first?
If you missed a deadline, start with the late fee and interest calculator. If you are about to file GSTR-3B, reconcile GSTR-2B first so you only claim credit your suppliers have reported.
Do these tools cover the 2025 rate changes?
Yes. From 22 September 2025 most goods and services fall in the 5% or 18% slabs, with 40% for specified luxury and sin goods. The liability calculator uses those slabs.
Where do I check input tax credit blocks?
Use the ITC eligibility checker for Section 16 conditions and the Section 17(5) blocked-credit list, and the reversal calculator for Rule 42 common credit and Rule 37 unpaid-invoice reversals.
Filing soon?
See every GSTR-1, GSTR-3B, IFF, PMT-06 and CMP-08 date for FY 2026-27 on the compliance calendar.