GST Exclusive Calculator
Add GST on top of your base price and get the invoice-ready total.
Enter the pre-tax amount and GST will be added on top.
How the calculation works
Starting from a pre-tax price, GST simply sits on top. Each half of the slab applies to the same base value.
- Total GST
Base amount × Rate ÷ 100 - CGST
Base amount × (Rate ÷ 2) ÷ 100 - SGST
Same as CGST for intra-state supplies - Invoice total
Base amount + Total GST
Worked example
You quote a client ₹50,000 excluding GST for equipment, sold within your state at 18%.
You enter
You get
Important points to keep in mind
- Always state on quotations whether prices are exclusive or inclusive of GST to avoid disputes.
- If your customer is in another state, switch the toggle to IGST — the payable total stays identical.
- Discounts agreed with the buyer apply before GST, not after (see the discount tool).
Frequently asked questions
What does 'GST exclusive' mean?
The amount does not include tax yet — GST gets added on top to arrive at the invoice total the customer pays.
Is the total different for inter-state buyers?
No. An 18% supply totals the same whether it splits into 9+9 CGST/SGST or goes wholly as 18% IGST — only the reporting differs.
Which rate should I pick?
Rates follow your product's HSN code or service SAC code. Use the HSN/SAC finder if unsure, then verify with your adviser for borderline items.
Related GST tools
Prepare your returns in GSTSelf
Done estimating? Prepare the actual return.
GSTSelf walks you through your invoices, builds GSTR-1 and GSTR-3B data, and keeps everything on your device — no uploads, no account.