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GST Calculator India 2026

Add or remove GST instantly, split CGST + SGST for intra-state sales or IGST for inter-state sales, layer in a profit margin, and look up HSN/SAC rates — built for freelancers, small business owners, students, and accountants.

🧾 Amount & Calculation Mode
₹
📊 GST Rate Slab

Common slabs: 0% essentials · 0.25% rough diamonds · 3% gold/silver · 5% household items & low-cost apparel · 12% processed food & mid-cost apparel · 18% most services & IT/consulting · 28% luxury & automobiles.

🗺️ Transaction Type

Same state as buyer → tax splits equally into CGST (Central) + SGST (State). Different state → 100% IGST (Integrated GST) applies instead.

Useful for wholesalers and manufacturers: enter your cost price above, add your margin here, and GST is calculated on the marked-up selling price.

TOTAL INVOICE / FINAL AMOUNT
₹0
Base ₹0 + GST ₹0
Base Price
₹0
Total GST
₹0
CGST
₹0
SGST
₹0
Base Price (Taxable Value)₹0
CGST₹0
SGST₹0
Total GST Payable₹0
Final Billed Amount₹0

Base Amount vs Tax Portion

📐 Live Formula With Your Numbers
🔎 HSN / SAC Quick Finder
CategoryHSN/SACGST Rate

Reference rates only — always confirm the exact HSN/SAC classification and rate on the official GST portal (gst.gov.in) before filing.

📤 Invoice Summary

      

        
        
        
      

    

  












  
  












How to Use This GST Calculator


    
  
  1. Enter your amount — type your base price if you're adding GST, or the final billed/invoice amount if you're removing (reverse-extracting) GST.
    2. 
  
  2. Choose Exclusive or Inclusive mode — Exclusive adds GST on top of your amount. Inclusive treats your amount as the GST-inclusive total and works backward to find the taxable value.
    3. 
  
  3. Pick the GST rate slab — select 0%, 0.25%, 3%, 5%, 12%, 18%, or 28%, or enter a custom rate for compensation cess or special categories.
    4. 
  
  4. Select Intra-State or Inter-State — this decides whether the tax splits into CGST + SGST (same state) or is charged entirely as IGST (different states).
    5. 
  
  5. Add a profit margin (optional) — wholesalers and manufacturers can layer a markup % on the cost price before GST is applied.
    6. 
  
  6. Check the live formula panel — every calculation shows the exact arithmetic with your real numbers substituted in, so students can follow along step by step.
    7. 
  
  7. Look up HSN/SAC codes — search the quick finder for common goods and services categories and their standard GST rate.
    8. 
  
  8. Export — copy a plain-text summary, download a CSV line-item, or generate a one-page PDF invoice summary.
    9. 




Want the full walkthrough — formulas, GST rate slabs, CGST/SGST/IGST splits, profit margins, HSN/SAC codes, and FAQs? Read the complete GST Explained guide on our blog.



This calculator provides estimates for general informational purposes and is not tax, legal, or accounting advice. GST rates, slabs, and rules vary by product, service, and notification, and change periodically. Consult a licensed Chartered Accountant or the official GST portal (gst.gov.in) for filing and compliance decisions. Last updated: July 2026.