Professional GST Tools for Indian Businesses

Navigate GST compliance with ease. From accurate interest calculations to GST-ready invoicing, we have everything you need in one place.

GST Invoice Generator

Generate professional, GST-compliant invoices downloadable as PDF. Manage customers and items.

Make Invoice

GST Calculator

Our master tool for quick CGST, SGST, and IGST calculations with inter/intra state support.

Open Calculator

GST Trading Calculator New

Perfect for traders & wholesalers to calculate margins, purchase/sell prices, and GST impact.

Calculate Profits

Due Date Checker New

Never miss a filing! Check latest due dates for GSTR-1, 3B, and 9 returns instantly.

Check Dates

Late Fee & Interest New

Calculate 18% interest and per-day late fees for delayed GST return filing accurately.

Calculate Penalty

HSN / SAC Code Finder New

Quickly find the correct classification and GST rates for any product or service in India.

Search Codes

Inclusive / Exclusive New

Fast tool to convert GST-inclusive prices to base price or vice versa with full breakup.

Convert Price

Profit Margin Calc New

Determine net profit margins after accounting for GST and various business expenses.

Analyze Profit

GST Registration New

Check if GST registration is mandatory for your business based on turnover and state.

Check Eligibility

Why Use Mahi GST Tools Suite?

Our GST tools are designed with one goal: Simplicity. Indian taxation can be overwhelming for small business owners and freelancers. We bridge that gap by providing intuitive calculators that do the heavy lifting for you.

100% Free & Fast

All our tools are completely free to use without any registration. We use advanced JavaScript for instant client-side calculations, which means your data never leaves your device.

Up-to-date with CGST Rules

Our calculators are regularly updated to reflect the latest changes in GST laws, threshold limits, and interest rates (18% p.a.).

Frequently Asked Questions

No, these are utility tools designed for estimate and calculation purposes. For legal and filing purposes, always cross-verify with the official GST portal or consult a Chartered Accountant.
For the Invoice Generator, your data is saved in your browser's LocalStorage. For other calculators, you can take a screenshot or print the page as a PDF.