Everything you need to know about GST registration, returns filing, ITC claims, and the new QRMP scheme.

Why GST compliance terrifies business owners

Ask any Indian entrepreneur what they dread most about running a business, and GST compliance comes up in the top three. Not because it's impossibly complex — but because the rules change frequently, the penalties are steep, and most accountants explain it in language designed to make you dependent on them.

This guide is different. We'll explain every essential GST concept in plain language — with practical examples your business can use today.

Do you need to register for GST?

Mandatory registration if:

Annual turnover exceeds ₹20 lakhs (₹10 lakhs in special category states)

You sell across state lines (interstate supply)

You sell through e-commerce platforms (Swiggy, Amazon, Meesho) — regardless of turnover

You're a casual taxable person or non-resident taxable person

Voluntary registration makes sense if:

Your clients are businesses who need your GSTIN for their ITC

You frequently make large purchases with GST and want to claim the credit

You want to appear credible to larger clients

GST Rates Quick Reference

The Three GST Returns You Must File

GSTR-1: All your sales. Due 11th of next month (monthly) or 13th of month after quarter (QRMP).

GSTR-3B: Summary + payment. Due 20th of next month.

GSTR-9: Annual return. Due 31st December.

Input Tax Credit (ITC) — Your Biggest Money-Saver

ITC lets you deduct the GST you paid on purchases from the GST you collected on sales.

Example:

GST collected from clients: ₹1,50,000

GST paid on business purchases: ₹25,200

Actual payment to government: ₹1,24,800

That ₹25,200 stays in your pocket.

ITC is blocked for: Personal expenses, food and beverages, life/health insurance (unless you sell insurance), works contract for immovable property.

Critical rule: ITC can only be claimed if your supplier has filed GSTR-1 and the invoice appears in your GSTR-2B. Always verify before claiming.

Late Filing Penalties

₹50/day per return (₹20/day for NIL return)

Maximum ₹10,000 per return

18% interest per annum on unpaid tax

File on time, always — even if you have zero sales

Using Proactiq GST Assistant

Proactiq handles all of this automatically:

1. Every invoice is GST-compliant with correct CGST/SGST/IGST split

2. GSTR-1 report generated in one click

3. ITC automatically tracked on all purchase invoices

4. Filing deadlines and reminders built in

5. Ask any GST question in plain language — instant AI answer

Try it free: Log in to Proactiq → Finance → GST Assistant

The Complete GST Compliance Guide for Indian SMBs in 2025