Software Costs and 2026 GST Rules
How GST filing software and professional help are priced, which return forms and due dates apply to you, and the portal and law changes in force in 2026.
GST return filing software
GST return filing for small businesses, worked out step by step
Every registered business in India runs the same monthly or quarterly cycle: record invoices, reconcile input tax credit, pay tax and file GSTR-1 and GSTR-3B on time. These guides explain what that cycle costs with software or a professional, which 2025–2026 portal changes matter, and how to calculate late fees and interest yourself.
- Understand how GST and accounting software is priced, and when a CA or GST practitioner is better value
- Use the late fee, compliance cost and software payback calculators with your own figures
- Check every rule at the source: GST portal, CBIC, GST Council, e-invoice and e-way bill portals
Explore by topic
Calculations and Checklists
Worked GST payable, late fee, interest, annual return and ITC reconciliation sums with the arithmetic shown, plus checklists for choosing software and closing each month.
Filing Mistakes, Notices and Sources
The errors that trigger GST notices, blocked e-way bills and cancelled registrations, how to respond, and the official portals where every rule can be checked.
Start here
Calculations and Checklists
How to calculate GST payable: worked examples with ITC set-off, reverse charge and cash ledger
Step-by-step GST payable calculations for small businesses in India, CGST, SGST and IGST, the order of ITC set-off, reverse charge, the 1% cash rule and how to check software output.
Filing Mistakes, Notices and Sources
Common GST filing mistakes small businesses make, and how to avoid them
The GST return mistakes that cause late fees, lost ITC, notices and cancelled registrations in India, grouped by stage, with the fix for each and when to get professional help.
Calculations and Checklists
GST late fee and interest calculation: GSTR-3B, GSTR-1 and GSTR-9 with worked examples
How to calculate GST late fees per day and their caps for GSTR-3B, GSTR-1 and GSTR-9, interest at 18% under section 50, and how the 2026 rules and proposed waiver affect you.
Software Costs and 2026 GST Rules
GST changes 2025–2026: GSTR-3B lock, three-year bar, IMS, GST 2.0 rates and the 57th Council meeting
The GST return and rate changes in force by October 2026 that affect small businesses and their software, and what the October 2026 GST Council recommended for later.
Software Costs and 2026 GST Rules
GST return due dates 2026: GSTR-1, IFF, GSTR-3B, CMP-08, GSTR-4 and GSTR-9 calendar
Which GST returns a small business files and when in 2026, monthly vs QRMP vs composition, with a filled-in calendar for October 2026 to March 2027 and the rules on extensions.
Software Costs and 2026 GST Rules
GST return filing software in India: costs, price drivers and the 2026 rules to check
What GST return filing software costs a small Indian business, what drives the price, when a CA is cheaper, and which 2026 GST rules your software must handle.
Tools
GST Late Fee Calculator
Estimate the late fee on a delayed GSTR-3B, GSTR-1 or GSTR-9 from the number of days late, before the statutory cap is applied.
Annual GST Compliance Cost Estimator
Estimate a year of GST return filing costs per GSTIN for doing it yourself, using billing or accounting software, or hiring a CA or GST practitioner.
GST Software Payback Calculator
Check how quickly GST or accounting software pays for itself through lower professional fees, staff time saved and late fees avoided.
Monthly GST Filing Checklist
A month-end routine for small businesses: invoices, IMS and GSTR-2B, GSTR-1, tax payment, GSTR-3B and record keeping.
Ways to file GST returns compared
| Option | How it works | Good for | Watch out for |
|---|---|---|---|
| Self-filing on the GST portal | Enter or upload GSTR-1 data and file GSTR-3B directly on gst.gov.in; GSTN's free offline tool can prepare JSON files | Very small businesses, nil filers, composition dealers with few invoices | No reconciliation help; easy to miss deadlines; you carry every error yourself |
| Desktop accounting software with GST module | Books, inventory and invoices on your computer; GST returns exported as JSON or filed through a connected service | Traders and manufacturers who already keep books in-house | Backups and updates are your job; licence per machine or user; check audit trail settings |
| Cloud billing or accounting app | Invoicing, purchases and GST reports online; returns filed via a GST Suvidha Provider connection | Service businesses and shops wanting invoices, payments and returns in one place | Data export format, price rises at renewal, user and GSTIN limits |
| Dedicated GST filing and reconciliation tool | Imports data from your ERP or books, reconciles with GSTR-2B and IMS, bulk-files for many GSTINs | Multi-state businesses, high invoice volume, e-invoicing filers, CA firms | Priced by GSTIN, invoice or API volume; still needs clean source data |
Frequently asked questions
Do I need paid software to file GST returns?
No. Every return can be filed directly on the GST portal at no charge, and GSTN offers a free offline tool to prepare GSTR-1 data. Paid software saves time when you have many invoices, multiple GSTINs, e-invoicing or regular ITC reconciliation. See the comparison of filing options.
What is the late fee for filing GSTR-3B late?
₹50 a day (₹25 CGST + ₹25 SGST) for a return with liability and ₹20 a day for a nil return, capped at ₹500 for nil returns and at ₹2,000, ₹5,000 or ₹10,000 depending on the previous year's turnover. Interest at 18% a year is charged separately on tax paid late. Use the late fee calculator.
Who has to file GSTR-9 for FY 2025-26?
Regular taxpayers with aggregate turnover above ₹2 crore; those up to ₹2 crore are exempt from FY 2024-25 onwards under Notification 15/2025-Central Tax. GSTR-9C is also required where turnover exceeds ₹5 crore. The normal due date for FY 2025-26 is 31 December 2026. See the GSTR-9 guide.
Can I correct a mistake in GSTR-3B after filing?
GSTR-3B cannot be revised once filed. Corrections are usually made in a later period's return, and outward supply errors should be fixed through GSTR-1A before GSTR-3B is filed, because auto-populated liability is locked in GSTR-3B. See 2025–2026 portal changes.
Is GST charged on accounting software subscriptions?
Yes, software subscriptions and professional services generally attract 18% GST. A regular registered business can usually claim that GST as input tax credit if the expense is for business and the invoice shows its GSTIN. Composition dealers cannot claim ITC.
Should I give my GST portal password to my accountant?
Avoid sharing your password. The portal uses OTP and two-factor authentication, and many professionals can work from data you export or file with your OTP at the time. If you must share access, change the password afterwards and keep the registered email and mobile in your own control. See working with a CA or GST practitioner.
What happens if I stop filing GST returns?
Late fees and interest keep building, e-way bill generation can be blocked after two missed returns, and continued non-filing can lead to suspension and cancellation of registration. Customers also lose ITC on your invoices if you do not report them. See registration cancellation for non-filing.
Did the October 2026 GST Council meeting change the filing rules?
The 57th meeting on 8 October 2026 recommended several process reforms, including a late fee waiver for small taxpayers filing within the due month and a new return-amendment mechanism from the April 2027 return. Recommendations take effect only when notified or legislated, so check the GST Council and CBIC for the notification.
How this site is made
Return Bahi is an independent information project. Guides are drafted with the help of AI writing tools and checked against official and primary sources before publication; see our Editorial Policy. We are not affiliated with any provider mentioned on the site and do not sell products or services.