All GST Tools & Calculators
A complete suite of fast, accurate, client-side tax tools engineered for Indian businesses, CAs, and tax professionals. 100% free with zero signup required.
Invoicing & Core Tax Calculators
Calculate GST, generate compliant invoices, and compute Input Tax Credit.
Universal GST Calculator
Instant inclusive & exclusive tax calculation with automatic CGST, SGST, IGST split across 38 states/UTs.
GST Invoice Generator
Create & download stylish GST-compliant tax invoices in A4 PDF format with custom logo and bank details.
Input Tax Credit (ITC) Calculator
Compute net eligible ITC, deduct blocked credits under Section 17(5), and determine net cash liability for GSTR-3B.
Reverse Charge (RCM) Calculator
Compute reverse charge tax liabilities where recipient pays GST in cash for GTA freight, legal fees, and director services.
Verification & Code Directories
Verify taxpayer credentials, look up statutory classifications, and check state codes.
GSTIN Structure Validator
Validate 15-digit GSTIN format using the official checksum algorithm with instant PAN and state extraction.
HSN & SAC Code Finder
Search Goods (HSN) and Service Accounting Codes (SAC) with applicable GST rates, cess, and 1-click clipboard copy.
GST State Code Directory
Complete official directory of 2-digit GST state codes (01 to 38) and alpha-2 abbreviations for Place of Supply & billing.
Compliance, Deadlines & Penalties
Track return deadlines, calculate late fees, interest, and evaluate registration thresholds.
GST Due Date Calendar
Statutory filing deadlines for GSTR-1, GSTR-3B, GSTR-4, GSTR-9, and CMP-08 with 1-click Google/Apple calendar sync.
GST Late Fee Calculator
Compute daily late fees for delayed GSTR-3B and GSTR-1 return filing with statutory turnover caps (₹500 to ₹10,000).
GST Interest Calculator
Calculate 18% p.a. interest on delayed cash tax payments and 24% p.a. on wrongful ITC utilization under Rule 88B.
GST Registration Limit Checker
Evaluate state-wise turnover exemption thresholds (₹40L/₹20L/₹10L) and Section 24 compulsory registration triggers.
TDS on GST Calculator
Calculate 2% TDS on GST for government contracts and PSU supplies exceeding ₹2.5 Lakhs with CGST/SGST/IGST breakdown.
Composition Scheme Calculator
Quarterly Form CMP-08 tax calculator for traders (1%), restaurants (5%), service providers (6%), and ₹1.5 Cr eligibility.
100% Client-Side Engine
Calculations run in 0 ms directly in your browser. Works offline without sending your financial data anywhere.
Statutory GST Rules
Updated for FY 2026-27 following official CBIC notifications, Section 16/17(5), Section 47 & Section 50 rules.
Zero Data Storage
No login, no cookies tracking tax amounts, no database. Your invoices and GST numbers stay private.