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Updated for 2026

Complete Suite of Free GST Tools & Calculators

30+ professional-grade calculators to simplify your GST compliance. 100% free, accurate, and easy to use.

30+ Tools 100% Free CA Verified
Found 35 tools

Returns & Filing Tools

GSTR-1 vs GSTR-3B Reconciler

Identify mismatches between outward supplies declared in GSTR-1 and tax paid in GSTR-3B.

  • Instant mismatch detection
  • Detailed reconciliation report
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GSTR-2B vs GSTR-3B ITC Mismatch

Compare ITC available in GSTR-2B with ITC claimed in GSTR-3B to avoid notices.

  • Prevents excess ITC claims
  • Supplier-wise analysis
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GST QRMP Eligibility Checker

Check if you are eligible for the Quarterly Return Monthly Payment (QRMP) scheme.

  • Based on aggregate turnover
  • Instant status check
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GSTR-1 Summary Generator

Create a consolidated summary of your sales invoices before filing GSTR-1.

  • B2B & B2C separation
  • HSN summary helper
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GST Due Date Tracker

Never miss a deadline. Track upcoming due dates for GSTR-1, 3B, and Annual returns.

  • State-wise dates
  • Extension alerts
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GST ARN Status Checker

Track the status of your GST registration application or refund claims using ARN.

  • Real-time status
  • Application tracking
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GSTR-9 Annual Return Helper

Simplifies the complex calculations required for filing the GSTR-9 annual return.

  • Auto-computes tables
  • Validates data consistency
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GST Return Filing Checklist

Interactive checklist to ensure you have all documents and data ready before filing.

  • Step-by-step guide
  • Error prevention
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GST Calculation Tools

GST Late Fee Calculator

Calculate exact late fees for GSTR-3B and GSTR-1 delays based on turnover and days.

  • As per latest amnesty schemes
  • Calculates CGST & SGST
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GSTR-3B Interest Calculator

Determine interest liability u/s 50 on delayed GST payments (Net vs Gross liability).

  • Net liability logic
  • 18% per annum calculation
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GST Multi-Period Interest

Compute interest for multiple tax periods in one go for audit and assessment purposes.

  • Bulk calculation
  • Exportable report
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Rule 42 ITC Reversal

Calculate common credit reversal for inputs used for both taxable and exempt supplies.

  • Step-by-step formula
  • Compliant with Rule 42
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Invoice Splitter Calculator

Helper tool to split large invoice values or extract tax components easily.

  • Taxable value extraction
  • Quick division
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GST Amount Calculator

Simple tool to add GST (5%, 12%, 18%, 28%) to a base amount.

  • One-click selection
  • Shows total & tax amount
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Reverse GST Calculator

Calculate the original taxable value from a GST-inclusive amount.

  • Back-calculation logic
  • Accurate decimal handling
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Compliance & Eligibility

E-Invoice Eligibility Checker

Verify if e-invoicing is mandatory for your business based on historical turnover.

  • Current threshold check
  • FY-wise analysis
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E-Way Bill Distance Estimator

Estimate distance between pincodes to validate E-Way Bill validity period.

  • Pincode to Pincode
  • Validity days calculation
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GST Registration Checker

Determine if you are liable to register for GST based on state and turnover limits.

  • State-specific limits
  • Service vs Goods logic
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Place of Supply Finder

Determine the correct Place of Supply (POS) to decide between IGST or CGST/SGST.

  • General & Specific rules
  • Avoids tax type errors
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GSTIN Validator & Decoder

Verify correctness of a GSTIN and decode state code and PAN structure.

  • Format validation
  • Checksum verification
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Reverse Charge (RCM) Check

Calculate liability under Reverse Charge Mechanism for specific goods/services.

  • GTA & Legal service rules
  • Liability estimator
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Refund Eligibility Checker

Check eligibility for GST refunds under inverted duty structure or zero-rated supplies.

  • Export/Inverted duty
  • Formula-based check
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Analysis & Optimization

ITC Estimator

Estimate eligible Input Tax Credit based on your purchase mix.

  • Maximize legitimate claims
  • Quick estimation
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Cash & Credit Ledger Optimizer

Optimize usage of credit ledger balance to minimize cash tax payments.

  • Utilization rules logic
  • Cash flow planning
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Section 17(5) Checker

Check for blocked credits (ineligible ITC) on specific goods and services.

  • Motor vehicle rules
  • Personal consumption
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Input-Output Ratio Analyzer

Analyze tax paid vs tax collected ratio to flag potential audit risks.

  • Anomaly detection
  • Industry benchmark
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Aggregate Turnover Calc

Calculate Aggregate Turnover accurately by including exempt and export supplies.

  • PAN-based calculation
  • Registration threshold
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Composition vs Regular

Compare tax liability under Composition vs Regular scheme to choose the best option.

  • Cost-benefit analysis
  • ITC impact factor
Use Tool Free

Advanced & Specialized

AI HSN/SAC Code Finder

Find the correct HSN or SAC code for your product/service using smart search.

  • Description based search
  • Rate finder
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Demand Penalty Estimator

Estimate potential penalty u/s 73 or 74 for short payment or non-payment.

  • Fraud vs Non-fraud
  • Penalty percentage
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Refund Delay Interest

Calculate interest due to you from the department for delayed GST refunds.

  • 6% interest calculation
  • Days counting
Use Tool Free

GSTIN Age Calculator

Determine the age and vintage of a GST registration for vendor verification.

  • Business stability check
  • Registration date logic
Use Tool Free

Credit/Debit Note Adjuster

Calculate tax impact of credit/debit notes on your liability.

  • Liability reduction
  • Time limit check
Use Tool Free

TDS/TCS Calculator

Compute TDS/TCS deduction liability for government contractors and e-commerce.

  • 1% / 2% rates
  • Base value logic
Use Tool Free

Prosecution Estimator

Assess financial thresholds that trigger prosecution proceedings under GST.

  • Evasion limits
  • Risk assessment
Use Tool Free

Why Use Our Tools?

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CA-Verified Accuracy

Algorithms built and verified by Chartered Accountants.

Save Time & Money

Instant calculations prevent costly compliance mistakes.

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Who We Help

Small Business Owners

Handle GST compliance without expensive software or constant dependency on consultants.

Accountants & CAs

Cross-verify calculations and generate quick reports for clients instantly.

Freelancers

Determine registration liability and create compliant invoices easily.

Enterprises

Use advanced tools for reconciliation, ITC optimization, and internal audits.

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