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How to File GSTR-3B in 2026: Complete Guide for GST Compliance

What is GSTR-3B?

GSTR-3B is the monthly GST return that all registered GST dealers must file. It summarizes your sales, purchases, and tax payments. Filing GSTR-3B on time is mandatory to maintain GST compliance and avoid penalties.

Why is GSTR-3B Important?

  • Ensures GST compliance
  • Avoids late fees and penalties
  • Maintains business reputation with authorities
  • Helps process GST refunds
  • Required for audit purposes

When is GSTR-3B Due?

GSTR-3B must be filed by the 20th of every month for the previous month. For example:

  • January sales → Filed by February 20
  • February sales → Filed by March 20
  • Quarterly taxpayers have extended deadlines

How to File GSTR-3B Online – Step by Step

  1. Step 1: Login to GST portal at gst.gov.in
  2. Step 2: Click on Services > Return Filing > File GSTR-3B
  3. Step 3: Select the month and financial year
  4. Step 4: Review your auto-filled data (from GSTR-1 and GSTR-2A)
  5. Step 5: Add ITC (Input Tax Credit) details
  6. Step 6: Calculate net GST payable
  7. Step 7: Submit and generate ARN (Acknowledgment Reference Number)

Who Should File GSTR-3B?

  • All regular GST-registered taxpayers
  • Businesses with GSTIN (GST Identification Number)
  • Not required for composition scheme taxpayers
  • Not required for input service distributors

Details to Fill in GSTR-3B

  • Outward taxable supplies (sales)
  • Inward supplies eligible for ITC
  • Tax amount payable (CGST, SGST, IGST)
  • ITC claimed for the month
  • Net tax liability payable

Penalty for Late GSTR-3B Filing

  • Rs. 50 per day for returns with tax liability
  • Rs. 20 per day for NIL returns
  • Additional interest at 18% per annum on unpaid tax

Common Mistakes to Avoid in GSTR-3B

  • Wrong ITC claim (claiming ineligible credits)
  • Not reconciling with GSTR-2B before filing
  • Incorrect CGST/SGST/IGST bifurcation
  • Filing after due date without checking penalties
  • Omitting exempt and nil-rated supplies

GSTR-3B Filing Assistance by Sanjay A & Co

Sanjay A & Co, Chartered Accountants provides end-to-end GSTR-3B filing services for businesses in Hoshiarpur and across Punjab. We ensure accurate, timely filing to keep your business fully GST-compliant.

Our GST Services:

  • Monthly GSTR-3B filing
  • GST reconciliation (GSTR-2A vs books)
  • ITC optimization and review
  • GST notice handling and response
  • Annual GST audit (GSTR-9 and GSTR-9C)

Contact Us

Phone: 9814814584, 7986782056
Email: ca.gupta.sanjay@gmail.com
Address: First Floor, Opp. District Court, Above DCB Bank, Hoshiarpur, Punjab – 146001
Available: Monday–Saturday, 8:30 AM – 7:30 PM | Online: 24/7 via WhatsApp

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