How to Legally Reduce Your GST Liability as a Small Business

The composition scheme

If your annual turnover is under ₹1.5 crore (₹75 lakh for special category states), you can opt for the Composition Scheme under GST. This lets you pay a fixed percentage of your turnover as GST (1% for traders, 5% for restaurants, 6% for other services) without dealing with monthly returns, input tax credit, or invoice-level compliance.

The trade-off is simple: you can't collect GST from customers (no tax invoice, only a bill of supply), and you can't claim input tax credit on your purchases. For businesses that sell primarily to end consumers (retail, restaurants), this often results in lower effective tax and dramatically reduced paperwork.

Input tax credit optimisation

If you're under the regular GST scheme, you can claim input tax credit (ITC) on GST paid for business purchases — raw materials, office supplies, rent (if GST is charged), professional services, and more. The key is to ensure all your vendors are GST-registered and filing their returns, because ITC can only be claimed when your supplier has filed their GSTR-1.

Review your vendor list quarterly. Switch to GST-registered suppliers for major purchases, even if their prices are slightly higher, because the ITC benefit often makes them cheaper on a net basis.

Reverse charge mechanism awareness

Certain categories of supply attract reverse charge, meaning you (the receiver) pay GST instead of the supplier. This applies to services from transporters, legal services from advocates, and goods from unregistered dealers above ₹5,000/day. While this seems like an additional burden, the GST paid under reverse charge can be claimed as ITC if the purchase is for business purposes.

Track these transactions separately in your books to ensure you're claiming all eligible ITC.

Quarterly filing for small taxpayers

Taxpayers with annual turnover under ₹5 crore can opt for QRMP (Quarterly Return Monthly Payment) scheme, which allows filing GSTR-1 and GSTR-3B quarterly instead of monthly, while still paying tax monthly through the challan system. This reduces compliance burden significantly — three returns a year instead of twelve.