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🧾 GST Tools

GST calculators, GSTIN validation, return summaries, late fee and refund tools.

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Add or extract GST at 5%, 18%, 40% & more. Instant CGST, SGST and IGST split with invoice break-up.

Back-calculate taxable value and GST hidden inside an MRP or GST-inclusive bill at any rate.

Search 250+ common HSN and SAC codes to find the applicable GST rate after the 2025 rate changes.

Check any 15-digit GSTIN offline: format, state code, embedded PAN, entity type and GSTN checksum.

Turn a sales list into GSTR-1 tables: B2B, B2C Large, B2C Small, rate-wise and HSN summary. Export to Excel.

Compute GSTR-3B tax payable with correct ITC set-off order (IGST first) and the exact cash to deposit.

Eligible ITC after blocked credits and Rule 42/43 proportional reversal for exempt and non-business use.

Late fee for GSTR-3B, GSTR-1, GSTR-4, GSTR-9 with turnover caps, plus 18% interest on tax paid late.

Quarterly CMP-08 tax at 1%, 5% or 6% and an eligibility check against turnover and other conditions.

Distance to validity: 1 day per 200 km (20 km for ODC). Get the exact expiry date-time and extension window.

Refund of unutilised ITC for exports under LUT (Rule 89(4)) and inverted duty structure (Rule 89(5)).

Browse all 98 HSN chapters (01–99) with descriptions, key headings and GST rates; search by code or keyword.