Taking an advance from a customer is common — but under GST, an advance can trigger a tax liability before you have supplied anything. The rules differ sharply between services and goods, and getting them right avoids both double taxation and short payment.
The core rule: services vs goods
- Services: GST is generally payable on an advance at the time of receipt. You must issue a receipt voucher and account for the tax in that period.
- Goods: The requirement to pay GST on advances has been removed for most taxpayers. GST on goods is due when the invoice is issued or the goods are supplied — not merely on receiving an advance.
The receipt voucher (for advances on services)
When you receive an advance against a service, issue a receipt voucher under Rule 50. It must contain:
- Supplier’s name, address and GSTIN
- A consecutive serial number and date
- Recipient’s name, address and GSTIN (if registered)
- Description of the goods/services
- Amount of advance received
- Rate and amount of GST on the advance
- Whether tax is on reverse charge basis
- Place of supply for inter-state advances
- Signature
If the rate or nature of supply is not known at the time of the advance, GST is charged at 18% and the supply is treated as inter-state by default until determined.
Computing GST on the advance
The advance is treated as inclusive of tax unless stated otherwise, so you back-calculate the GST. For example, if you receive a ₹1,18,000 advance for a service taxable at 18%:
- Taxable value = ₹1,18,000 × 100 / 118 = ₹1,00,000
- GST = ₹18,000 (₹9,000 CGST + ₹9,000 SGST if intra-state)
Alternatively, if the advance is stated as ₹1,00,000 plus GST, you simply add ₹18,000.
Adjusting the advance against the final invoice
When you finally supply the service, issue the tax invoice for the full value and adjust the advance already received and taxed, so you don’t pay GST twice:
- Receipt voucher issued on the advance → GST paid on the advance portion.
- Final tax invoice raised for the whole supply.
- The advance (and its tax) is set off in the invoice/return so only the balance tax is paid.
The refund voucher (if the deal falls through)
If you received an advance, issued a receipt voucher, but then no supply happens and no invoice is issued, you return the money and issue a refund voucher (Rule 51). This reverses the earlier receipt voucher and lets you adjust the GST paid on the advance.
Reporting advances
Advances on which GST is paid are reported in your GSTR-1 (advances received), and later the adjustment of those advances against invoices is reported when the supply is invoiced. Keeping receipt vouchers, refund vouchers and invoices cross-referenced makes this reconciliation clean.
A quick example (service advance)
A consultant receives a ₹50,000 advance (plus GST) for a project:
- Receipt voucher: advance ₹50,000, GST @ 18% = ₹9,000
- On completion, tax invoice for the full ₹1,00,000 fee + ₹18,000 GST
- The ₹50,000 advance and its ₹9,000 GST are adjusted, so the balance ₹9,000 GST is paid with the final invoice
The bottom line
For services, charge GST on advances and issue a receipt voucher; adjust it against the final tax invoice, and use a refund voucher if the deal is cancelled. For goods, most taxpayers pay GST only at the invoice stage, not on advances. Track advances carefully so you neither pay twice nor miss the liability.
For a complete walkthrough of GST timing and vouchers, read the GST Guide for Small Businesses.