How to Do a GST Return: Step-by-Step Guide for Small Business

GST registration threshold (India): ₹40 lakh for goods, ₹20 lakh for services ·
Filing frequency: Monthly (turnover above ₹1.5 crore) or quarterly (at or below ₹1.5 crore) ·
Late filing penalty: ₹50 per day (₹25 CGST + ₹25 SGST) ·
Standard due dates: 11th of next month for GSTR-1, 20th for GSTR-3B

The table below condenses the deadlines and verification rules that matter at filing time.

How can I file my GST return?

Filing on the GST Portal follows a predictable rhythm: pick your financial year, quarter, and month, then open the return tile that matches your taxpayer type. The GST Portal GSTR-3B User Guide (official filing manual) documents the exact sequence, and once you’ve run through it twice, the muscle memory sticks.

What are the steps to file GSTR-1?

1. Log in to the GST Portal and navigate to Services > Returns > Returns Dashboard (GST Portal GSTR-3B User Guide)
2. Select the financial year, quarter, and month
3. Open the GSTR-1 tile and enter invoice-level details: B2B invoices, B2C supplies, exports, credit and debit notes, and HSN-wise summaries (Axis Bank (banking-sector tax explainer))
4. Preview the return, generate the summary, and submit
5. Complete verification via EVC (OTP-based for proprietors and individuals) or DSC (mandatory for companies and LLPs)
6. Note the ARN the portal generates after successful submission (Axis Bank)

How to file GSTR-3B?

1. Open the GSTR-3B tile from the Returns Dashboard after selecting the period (GST Portal GSTR-3B User Guide)
2. Declare outward supplies and reverse-charge inward supplies
3. Report supplies notified under section 9(5) of the CGST Act in their dedicated section
4. Enter certain inter-State supplies and eligible input tax credit
5. Separately report exempt, nil-rated, and non-GST inward supplies
6. Add interest and late fee where applicable
7. Preview the draft, enter payment details, and file the return with DSC or EVC

Can I file GST return online?

Yes — three channels exist, and picking the right one matters more than most guides admit. The GST Portal Welcome Kit for New Businesses (official onboarding guide) confirms returns are filed either directly on the GST Portal, through offline utilities provided by the portal, or via GST Suvidha Providers.

Can I file GST return myself?

Self-filing isn’t about capability — it’s about transaction complexity. If your invoices are straightforward and your customers are mostly B2C, the portal is manageable. The moment you’re juggling multi-state B2B supply chains, credit notes, and export documentation, the calculus shifts.

Do I need a chartered accountant?

• No legal requirement mandates a CA for GST filing — the portal is designed for direct taxpayer use (GST Portal Welcome Kit)
• Small businesses with simple transactions routinely self-file
• Errors on self-filed returns can trigger notices and penalties — the risk is real, not theoretical
• Complex cases (multi-state, exports, reverse charge) benefit from professional review

What are the benefits of self-filing?

• Save ₹3,000–₹10,000 per year in typical CA fees
• Full control over your financial data
• Direct learning — you understand your own books better
• Faster turnaround for routine filings

What are the risks of self-filing?

• Penalty exposure for incorrect filing: ₹50 per day (₹25 CGST + ₹25 SGST)
• Time investment — expect 2–4 hours per filing cycle initially
• Keeping up with legislative changes on exemptions and rates
• Missing the ARN or verification step leaves the return technically unfiled

The pattern: self-filing only earns its keep when the monthly transaction count stays low and the books stay clean enough to file in under a day.

How much does it cost to file a GST return?

There is no government fee for submitting a GST return — that’s the piece most first-timers miss. The costs you actually face fall into three buckets, and only one of them is mandatory.

Cost of hiring a CA for GST filing

• Typical fees in India: ₹3,000–₹10,000 per year for small businesses
• Pricing varies by region, turnover, and transaction complexity
• Some CAs charge per return (₹500–₹1,500) rather than annually

Hidden costs of self-filing

• Your time — realistically 20–40 hours per year for a monthly filer
• Accounting software subscriptions (₹2,000–₹15,000 per year)
• Learning curve on portal updates when the interface changes

Government fees and penalties

• Filing fee: nil
• Late filing penalty: ₹50 per day (₹25 CGST + ₹25 SGST)
• Interest at 18% per annum on unpaid tax

Here is the breakdown in a single view.

The pattern: the biggest line item is your own time, not anyone’s fee. A business owner billing ₹1,500 per hour who spends 30 hours a year on GST filings is effectively paying ₹45,000 in opportunity cost — a CA retainer at ₹10,000 is a discount, not an expense.

The implication: anyone billing more than roughly ₹500 an hour should compare a ₹10,000 retainer against 30 hours of self-filing before defaulting to the DIY route.

Do I have to pay GST if I earn under $75000?

The $75,000 figure is the Australian threshold, not the Indian one — worth flagging because search results frequently blur the two. Each country sets its own registration trigger, and in every case the threshold governs registration, not the return itself. If you’re below the threshold and not registered, there’s no return to file.

What is the GST registration threshold in India?

• ₹40 lakh for goods (GST Portal Welcome Kit for New Businesses)
• ₹20 lakh for services
• Lower thresholds apply in specified special category states
• Once you cross the threshold, registration and return filing become mandatory — not optional

What is the threshold in Australia?

• AUD 75,000 for most businesses
• AUD 150,000 for non-profit organisations
• Registered businesses file BAS (Business Activity Statements) rather than GSTR forms

What about small supplier exemption in Canada?

• CAD 30,000 over four consecutive calendar quarters
• Below that, small suppliers are exempt from registration
• Exemption is optional — some businesses register voluntarily to claim input credits

The common thread across all three jurisdictions: turnover below threshold means no registration, and no registration means no return. The moment you cross, the compliance machinery starts whether you’re ready or not.

Who is exempt from paying GST?

Exemptions divide into two families: exempt supplies (things the law says don’t attract GST) and exempt entities (businesses small enough that registration isn’t required). Most taxpayer confusion stems from treating these as the same thing.

Exempt goods and services

• Fresh vegetables and unprocessed food grains
• Milk and certain dairy products
• Printed books and educational materials
• Healthcare and specific educational services
• Agricultural produce in defined cases (GST Delhi Zone (official zonal advisory body))

Exempt entities (small suppliers, agriculturists)

• Businesses below the ₹40 lakh / ₹20 lakh threshold
• Agriculturists supplying produce from their own cultivation
• Composition scheme opt-ins pay tax at a flat rate with reduced filing — quarterly CMP-08 plus annual GSTR-4 (GST Delhi Zone)

How to check if your product or service is exempt

• Check the official GST rate schedule notifications
• Confirm HSN/SAC classification for your specific product
• Verify exemption status hasn’t changed — legislative updates are frequent
• When in doubt, ask your jurisdictional GST officer or a CA for a written opinion

The implication: an exempt supply still shows up in the return, and a composition opt-in changes the filing calendar more than it changes your input tax recovery.

What’s unclear in GST filing

The pattern: the four numbers at the top are stable enough to plan around; the edges are where a written opinion is cheap insurance.

Upsides and downsides of self-filing

The takeaway: self-filing is a time-for-money trade, and the break-even depends on how clean your books are.

Quotes from the field

“Returns can be furnished online through the GST Portal, offline utilities provided by the portal, or GST Suvidha Providers.”

— GST Portal Welcome Kit for New Businesses (official onboarding guide)

“Composition taxpayers furnish a quarterly self-assessed-tax statement in CMP-08, due by the 18th day of the month succeeding the relevant quarter.”

— GST Delhi Zone (official zonal advisory body)

“For GSTR-1, EVC is described as OTP-based verification for proprietors and individuals, while DSC is mandatory for companies and LLPs.”

— Axis Bank (banking-sector tax explainer)

The pattern: official and banking-sector sources describe the same workflow even when they focus on different taxpayer types.

Summary

Self-filing a GST return in India is a real option for small businesses with simple transaction patterns — the portal documentation is thorough, the government fee is nil, and the only genuine cost is your time. For a sole trader in Coimbatore or Ludhiana handling B2C invoices and a modest supplier list, the decision is clear: file yourself for the first year, keep a clean purchase register, and only hire a professional if a mismatch notice arrives. A sole trader who files cleanly for the first four quarters keeps ₹3,000–₹10,000 in the business and knows exactly when the transaction volume starts justifying a professional filing fee.

For a form-by-form walkthrough, see the step-by-step guide to GSTR-1 and GSTR-3B. If you are comparing jurisdictions, the India and New Zealand GST guide adds a cross-country perspective.

Frequently Asked Questions