8 Bit GST Invoice for WooCommerce

Every Indian WooCommerce store has to issue proper GST tax invoices and file GSTR-1. This plugin does the GST part for you — it runs 100% on your own WordPress site, with no external server and no monthly SaaS fee.

Features — all free, nothing locked

• Buyer GSTIN at checkout — “Purchase for Business? Enter GSTIN” and “Business Registered Name” fields (both optional) on both the Classic checkout and the new Block checkout (Store API).
• Real GSTIN validation — 15-character format check plus the official GSTN Mod-36 check-digit algorithm, not just a regex. Typos are caught before the order is placed.
• State match check — the first two digits of the GSTIN must match the buyer’s billing state (all 36 States & UTs, official GST state codes 01–38).
• HSN / SAC code and GST rate on simple products and every variation. The HSN code is frozen onto each order line at checkout, so old invoices never change when you edit a product later.
• Automatic CGST + SGST vs IGST — same state as your store = CGST + SGST, different state or abroad = IGST. Place of Supply is printed with its state code.
• Printable GST Tax Invoice (print or “Save as PDF” from the browser) with seller GSTIN, PAN, buyer GSTIN, Place of Supply, HSN-wise line items, CGST / SGST / IGST break-up, HSN summary, amount in words in Lakh / Crore and an authorised signatory block. Sequential invoice numbers with your own prefix.
• GSTIN shown in the admin order screen (editable), My Account order view, thank-you page and order emails.
• Fully compatible with WooCommerce HPOS (High-Performance Order Storage) and Cart & Checkout Blocks.
• GST 2.0 ready: slabs 0%, 0.25%, 3%, 5%, 12%, 18%, 28% and 40%.
• Auto-populate WooCommerce GST tax rates — one click creates “GST n%” tax classes with CGST + SGST for your state and IGST for every other state.
• Bulk HSN codes — assign HSN + GST rate to a whole product category, or import from a CSV (SKU, HSN, rate).
• 1-Click GSTR-1 export for your CA — B2B, B2C Large, B2C Small and HSN summary (B2B / B2C) CSVs with the GST offline-tool column headers, filtered by month.