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GST Calculator

Free GST calculator to add or remove GST online. Supports 5%, 12%, 18%, and 28% with CGST, SGST, and IGST breakdown.

Total Amount₹1,18,000.00
GST Amount₹18,000.00@ 18%
Base Price₹1,00,000.00

GST Breakdown

Base Price (before GST)₹1,00,000.00
CGST @ 9%+ ₹9,000.00
SGST @ 9%+ ₹9,000.00
Total GST (18%)₹18,000.00
Total Invoice Amount₹1,18,000.00

* For inter-state transactions, IGST @ 18% applies instead of CGST + SGST.

What this tool helps you estimate

This GST calculator helps businesses, accountants, and buyers add GST to a base amount or remove GST from an inclusive price. It also shows CGST and SGST or IGST implications for easier invoice review and pricing checks.

How to use this calculator

  1. Choose whether you want to add GST to a base amount or remove GST from an inclusive amount.
  2. Enter the invoice amount and select the applicable GST rate.
  3. Review the base price, GST amount, and total invoice value.
  4. Use the CGST and SGST or IGST note to understand the likely tax split for the transaction type.

Disclaimer: This calculator provides estimates based on the information you enter. Actual values may vary. Tax laws and financial assumptions can change. Please consult a qualified professional before making financial decisions.

Frequently asked questions

Can this GST calculator remove GST from an inclusive price?

Yes. Switch to the remove GST mode and enter the total amount to calculate the base price and tax portion.

Does the calculator show CGST and SGST separately?

Yes. For intra-state transactions it shows an even split between CGST and SGST. It also notes when IGST would generally apply for inter-state supplies.

Which GST rates are supported?

The calculator supports standard GST rates of 5%, 12%, 18%, and 28%, which cover most common use cases.

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