GST Invoice Calculator
Quickly work out an invoice line total with GST — including discount and the CGST/SGST split.
Show solution steps
What is the GST Invoice Calculator?
A GST invoice calculator computes the taxable amount and GST for an invoice line, applying any discount and splitting GST into CGST and SGST for intra-state sales.
How to Calculate
Subtotal = quantity × rate; apply discount; add GST on the taxable amount. CGST and SGST are each half the GST.
Formula
Total = (qty × rate − discount) × (1 + GST%)
How to Use
- Enter your details in the fields above.
- The result updates instantly as you type.
- Use Copy, Print or Download PDF to save your result.
Frequently Asked Questions
When is GST split into CGST and SGST?
For sales within the same state, GST is split equally into CGST and SGST. Inter-state sales use a single IGST instead.
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