Wrong HSN code leads to GST return errors
HSN codes classify goods and SAC codes classify services. Invoice-level codes feed into GSTR-1 and customer ITC records, so wrong classification creates downstream reconciliation issues.
HSN/SAC classification note
Search by product or service description. Use official HSN/SAC schedules and current CBIC notifications before finalising a code or rate. Share exact product/service descriptions with an expert when classification is unclear.
Common HSN/SAC mistakes by industry
- Restaurants using codes/rates without separating alcohol or non-GST supplies.
- Clothing rate errors around value thresholds.
- Software services confusing IT consulting, software development and licensing SACs.
- Construction contracts not using correct works-contract SAC series.
- Textile and import products needing deeper chapter classification.
What to tell a GST expert
- Exact product or service description.
- Industry and use case.
- Goods versus services.
- Import/export context.
- Current invoice format and rate used.
How to use this page safely
GST HSN Code Finder depends on the financial year, entity type, location, turnover, portal status, notice dates, transaction volume, documentation quality and whether past filings were done correctly.
Use this page as preparation guidance. Before filing, responding, registering, claiming or appealing, share exact forms, notices, portal screenshots, amounts, due dates and prior acknowledgements with a qualified professional.
A strong WorkIndex quote should state scope, assumptions, documents required, timeline, exclusions and whether follow-up, correction filing, reconciliation or notice-response support is included.
How to compare WorkIndex responses
- Ask whether the expert has handled this exact service type, industry and portal workflow before.
- Confirm whether the quote includes filing only, advisory only, or also reconciliation, correction, response drafting and follow-up.
- Prefer experts who ask for records before final pricing instead of quoting blindly.
- For urgent matters, include statutory deadline, notice/order date, current portal status and financial exposure.
- Keep acknowledgement, computation, challan, report, working papers and communication trail after completion.
Keep these ready before requesting quotes
- PAN, Aadhaar, GSTIN, TAN, DIN, CIN, LLPIN, UAN, DSC or registration number as applicable.
- Portal login access or screenshots from Income Tax, GST, MCA, EPFO, ESIC, ICEGATE, RERA or other relevant portals.
- Previous filings, acknowledgements, challans, certificates, orders, notices, audit reports and working papers.
- Bank statements, invoices, contracts, payroll records, books export, rent agreements, transaction reports or project documents relevant to the case.
- A short written summary of what happened, what deadline exists, what help you need and whether support can be remote or must be local.
How to get better quotes faster
- Mention whether you need one-time filing, urgent correction, registration, calculator review, audit, monthly retainer, appeal, technology build or advisory review.
- Add approximate transaction count, employee count, turnover range, number of filings/years pending, and any notice deadline so experts can size the work properly.
- For accounting and bookkeeping pages, share the software used, number of bank accounts, monthly invoice count, GST status, payroll size and whether old cleanup is needed.
- For developer pages, share the product type, existing codebase, framework preference, design readiness, integrations, hosting and expected timeline.
- For tax and GST disputes, upload or summarise the section/form/order number, demand amount, date of service, due date and current portal status before asking for a fee quote.
FAQs
Is HSN mandatory on all invoices?
Applicability and digit level depend on turnover and supply type. Check current GST rules.
Can wrong HSN attract penalty?
Wrong classification can create tax short payment, notices, customer ITC issues and penalties.
How do I find HSN for a new product?
Share product composition, use, catalog and import classification where available.
Can WorkIndex experts review invoice format?
Yes. Upload sample invoice and product list.