GST Invoicing Guide for Event Companies in India

For event companies, billing is where good work either gets paid cleanly or turns into a back-and-forth headache. Corporate clients won't release payment without a correct GST tax invoice; the wrong tax split can trigger disputes; and missing an e-invoice requirement can mean a non-compliant document. The good news is that GST invoicing for event services follows a clear, learnable pattern. This guide explains, in plain English, what a compliant invoice needs, how e-invoicing works, how to split the tax, and the mistakes to avoid.

This article is general guidance, not legal or tax advice. GST rules, rates and thresholds change and depend on your specific situation — always confirm with a qualified chartered accountant before relying on anything here.

What a GST tax invoice must contain

A GST tax invoice is more than a bill — it's a legal document that lets your client claim input tax credit. To be valid, it generally needs to include:

• Your details — name, address and GSTIN of your event company.
• A unique, sequential invoice number and the date of issue.
• The customer's details — name, address, and GSTIN if they are registered.
• Place of supply and the state, especially for inter-state transactions.
• A clear description of the service with the relevant HSN/SAC code.
• Taxable value, the GST rate, and the tax amount split into CGST + SGST or IGST.
• The total invoice value in figures, and a signature or digital signature.

Getting your invoice numbering right matters too: numbers must be sequential and unique within the financial year. Manual numbering is a common source of duplicates and gaps — one reason most event companies move to software that generates the sequence automatically.

CGST vs SGST vs IGST — and place of supply

How you split the tax depends on whether the supply is intra-state (you and the place of supply are in the same state) or inter-state (different states). This is decided by the place of supply rules, not simply where your office is.

• Intra-state supply → the GST is split into CGST + SGST in equal halves.
• Inter-state supply → a single IGST at the combined rate applies.

For event services this gets interesting because an event often happens in a different state from where the client is registered. Place-of-supply rules for services tied to a specific venue or immovable property can differ from general B2B rules, so the location of the event can change the tax treatment. When you bill a Delhi-registered client for an event held in Goa, working out the correct place of supply — and therefore CGST/SGST vs IGST — is exactly where manual invoicing goes wrong. Determining the customer's state from their GSTIN and applying the right split is something good billing software handles for you automatically.

E-invoicing: IRN and QR codes

Under India's e-invoicing system, businesses above the prescribed turnover threshold must generate an e-invoice for B2B supplies. This does not mean emailing a PDF — it means reporting the invoice to the government's Invoice Registration Portal (run by NIC), which validates it and returns:

• An IRN (Invoice Reference Number) — a unique hash that registers the invoice.
• A signed QR code that must be printed on the invoice.

Only after the IRN is generated is the invoice considered a valid e-invoice. The turnover threshold has been lowered in stages over the years, so more businesses fall under e-invoicing than many event owners realise — check where you currently stand with your CA. Doing this by hand on the portal for every invoice is slow; ShowRunner generates the IRN and QR directly through the NIC integration, so a compliant e-invoice is produced as part of raising the bill.

TDS — what event companies should expect

Separately from GST, your corporate clients may deduct TDS (Tax Deducted at Source) under the income-tax law when they pay you for services. This means the client pays you the invoice value minus a small percentage, deposits that amount against your PAN, and issues a TDS certificate you can claim later. Practically, this affects your cash flow, not your GST: your GST is still charged on the full taxable value, but the actual money received is net of TDS. Track TDS deducted per client so it reconciles at year-end — software that records TDS against each invoice saves a painful manual exercise.

Note the distinction: TDS under income tax (deducted by your client) is different from TCS/TDS provisions under GST. Most event companies mainly deal with income-tax TDS on their service receipts — confirm your specifics with your CA.

Other documents you'll use

Proforma invoices

Before the work is confirmed, you'll often issue a proforma invoice — a quotation-style document that is not a tax invoice and does not create a GST liability. It helps the client raise a PO or release an advance. Once the service is delivered (or as agreed), you convert it into a proper tax invoice.

Credit notes

If you need to reduce an already-issued invoice — a discount, a cancellation, or a correction — you issue a credit note rather than editing or deleting the original. Credit notes keep your GST records clean and auditable.

Common GST invoicing mistakes

• Wrong CGST/SGST vs IGST split from misjudging place of supply — the single most frequent error for multi-state events.
• Duplicate or out-of-sequence invoice numbers from manual numbering.
• Missing the e-invoice IRN/QR when the business is above the threshold.
• Incorrect or missing GSTIN for the customer, blocking their input credit.
• Editing a sent invoice instead of issuing a credit note.
• Wrong financial year handling — India runs April to March, and invoice series should reset cleanly.

Make compliant invoicing automatic

Most of these errors come from doing tax-sensitive work by hand across spreadsheets and Word templates. GST invoicing built for events removes the guesswork: ShowRunner auto-calculates CGST, SGST and IGST based on the customer's state, generates the NIC e-invoice IRN and QR code, handles SEZ exemptions and TDS, supports proforma invoices and credit notes, and prints your bank and IFSC details on every invoice — all aligned to the Indian April-to-March financial year. Instead of worrying whether a document is compliant, you raise it and move on.

GST invoicing rewards consistency. Set up your invoice format correctly, understand place of supply, stay on top of e-invoicing thresholds, and let software enforce the rules — and billing stops being the part of the job you dread.