Free GST & Business
Calculators & Tools
Instant, accurate tools for GST filing, invoicing, tax calculations and compliance — built for Indian businesses, CAs and accountants.
Tools Businesses Use Every Day
These three tools handle the calculations Indian businesses run into most — GST breakdowns, income tax estimates, and professional invoicing.
GST Calculator
Calculate CGST, SGST, IGST instantly. Enter amount, select slab — get the exact tax breakup in seconds.
- All GST slabs — 5%, 12%, 18%, 28%
- Inclusive & exclusive calculation
- CGST / SGST / IGST split
Income Tax Calculator
Estimate your income tax under old and new regime. Compare slabs, deductions, and final liability side by side.
- Old vs New regime comparison
- Section 80C, 80D deductions
- FY 2025-26 updated slabs
Invoice Generator
Create GST-compliant invoices in minutes. Add your logo, items, tax — download as PDF or share via WhatsApp.
- GST-compliant format
- PDF download & WhatsApp share
- Custom logo & business details
GST, Tax & Compliance Tools for Indian Businesses
Every tool is free, instant, and requires no signup. Built to save time on the calculations you do every week.
GST Calculator
Calculate CGST, SGST, and IGST for any amount across all GST slabs — inclusive or exclusive.
TDS Calculator
Calculate TDS deduction on salary, rent, professional fees, and contractor payments under all applicable sections.
Income Tax Calculator
Compare old vs new tax regime, apply deductions, and estimate your exact income tax liability for the current FY.
HSN/SAC Finder
Search and find the correct HSN code for goods or SAC code for services — with GST rate mapping for each code.
GSTIN Validator
Verify any GSTIN number instantly. Check registration status, business name, state, and filing compliance of any taxpayer.
Invoice Generator
Create professional GST-compliant invoices with your branding. Add items, tax, and download as PDF instantly.
Salary Calculator
Break down CTC into in-hand salary. See PF, ESI, professional tax, and HRA deductions with exact take-home amount.
ROI Calculator
Estimate how much time and money ERP Group saves your business. Input your team size and current process to see projected ROI.
GST Calendar
Never miss a GST filing deadline. View all GSTR-1, GSTR-3B, GSTR-9, and CMP-08 due dates in one calendar view.
GSTR-1 Generator
Convert your Excel sales data into GST-portal-ready GSTR-1 JSON format. Upload directly to the GST portal without errors.
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Built to Help, Not to Gate
These tools solve real problems Indian businesses face every day. When you're ready for a full ERP, you'll already know us.
Instant Results
No loading, no signup forms. Enter your numbers and get the answer immediately.
Always Up to Date
GST slabs, tax rules, and compliance formats updated as soon as the government notifies changes.
Works on Any Device
Desktop, tablet, or mobile — every tool works the same way, anywhere you are.
Automate Your Entire GST & Accounting Workflow
These tools handle one-off calculations. ERP Group handles everything — invoicing, filing, payroll, inventory — on autopilot. See it in a free demo.