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Complete Guide to GST Filing for Small Businesses in 2025

Learn everything about GST registration, return filing, and compliance requirements for small businesses in India.

CA Rajesh Kumar
Senior Tax Consultant
30 December 2025
Complete Guide to GST Filing for Small Businesses in 2025

GST (Goods and Services Tax) has revolutionized the tax structure in India. For small business owners, understanding GST compliance is crucial for smooth operations.

What is GST?

GST is an indirect tax levied on the supply of goods and services in India. It has replaced multiple indirect taxes like VAT, Service Tax, and Excise Duty.

Types of GST

  1. CGST - Central Goods and Services Tax
  2. SGST - State Goods and Services Tax
  3. IGST - Integrated Goods and Services Tax

GST Registration Requirements

Businesses need to register for GST if:

  • Annual turnover exceeds ₹40 lakhs (₹20 lakhs for special category states)
  • Engaged in inter-state supply
  • E-commerce sellers
  • Casual taxable persons

GST Return Filing

Regular businesses must file:

  • GSTR-1: Monthly/Quarterly outward supplies
  • GSTR-3B: Monthly summary return
  • GSTR-9: Annual return

Filing Deadlines

Return TypeFrequencyDue Date
GSTR-1Monthly11th of next month
GSTR-3BMonthly20th of next month
GSTR-9Annual31st December

Common Mistakes to Avoid

Always ensure your invoice details match with your GSTR-1 returns to avoid mismatches.
  1. Missing deadlines
  2. Incorrect GSTIN
  3. Wrong HSN codes
  4. Not reconciling ITC

Need Help?

Our team of experts can help you with GST registration, filing, and compliance. Contact us for a free consultation!

Disclaimer: This article is for informational purposes only. Please consult a tax professional for specific advice.

Related Topics

#GST#Tax Filing#Small Business#Compliance