GST Guide for Small Businesses โ Rates, Filing & Input Credit
Complete GST guide for Indian small businesses. Understand registration, rates, filing deadlines, input tax credit, and composition scheme.

GST Registration โ Who Needs It?
- Mandatory registration if:
- Annual turnover exceeds โน40 Lakh (goods) or โน20 Lakh (services)
- You sell goods/services inter-state (any turnover)
- You sell on e-commerce platforms (Amazon, Flipkart)
- You're a casual taxable person
- Voluntary registration is beneficial if:
- Your customers are GST-registered businesses (they need your GSTIN for input credit)
- You want to claim input tax credit on your purchases
- It adds credibility and professionalism to your business
GST Rate Structure
| Rate | Category | Examples |
|---|---|---|
| 0% | Exempt | Fresh food, milk, education |
| 5% | Essential | Packaged food, economy transport |
| 12% | Standard | Processed food, business class |
| 18% | Standard | Most services, electronics, IT |
| 28% | Luxury | Cars, tobacco, aerated drinks |
Most common rate for services: 18% (IT, consulting, rent, professional services) Most common rate for goods: 12-18%
Use our GST Calculator to quickly compute GST on any amount at any rate.
Input Tax Credit (ITC) โ Save Money
ITC is the most powerful GST benefit for businesses. You can claim credit for GST paid on business purchases against GST collected on sales.
Example: You charge 18% GST on โน1,00,000 service = โน18,000 GST collected. You paid 18% GST on โน40,000 office rent = โน7,200 GST paid. Net GST payable = โน18,000 - โน7,200 = โน10,800.
ITC is available on: Goods and services used for business, capital goods, input services ITC is NOT available on: Personal use, food & beverages (unless you're in food business), health insurance for non-employees
Composition Scheme โ Simplified Compliance
For small businesses with turnover up to โน1.5 Crore (goods) or โน50 Lakh (services):
- Flat rate: 1% (manufacturers), 5% (restaurants), 6% (services)
- Quarterly filing instead of monthly
- No ITC can be claimed
- Cannot sell inter-state
Best for: Small manufacturers, restaurants, and local service providers who sell B2C (to consumers, not businesses).
Filing Deadlines
- Regular taxpayers:
- GSTR-1 (outward supplies): 11th of next month
- GSTR-3B (summary return): 20th of next month
- GSTR-9 (annual return): December 31st
- Composition taxpayers:
- CMP-08: Quarterly (18th of month after quarter)
- GSTR-4 (annual): April 30th
Late filing penalty: โน50/day (โน20/day for NIL return), max โน5,000. Interest at 18% on tax due.
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