Use the fields below to prepare a full GST invoice summary with item-level discounts, invoice-level discounts, freight tax, rounding, and payment tracking.
| Description | Qty | Unit Price | Discount % | GST % | Taxable Value | GST Amount | Line Total |
|---|---|---|---|---|---|---|---|
| Laptop Bag | 3 | ₹850.00 | 5% | 18% | ₹2,422.50 | ₹436.05 | ₹2,858.55 |
| Consulting Fee | 1 | ₹2,500.00 | 0% | 18% | ₹2,500.00 | ₹450.00 | ₹2,950.00 |
| Stationery Pack | 5 | ₹120.00 | 10% | 5% | ₹540.00 | ₹27.00 | ₹567.00 |
This example assumes GST-exclusive pricing and line-level discounts before tax.
Line-Level Formulas
Gross Amount = Quantity × Unit Price
Item Discount = Gross Amount × Discount %
After Item Discount = Gross Amount − Item Discount
Exclusive Taxable Value = After Item Discount
Exclusive GST = Taxable Value × GST %
Line Total = Taxable Value + GST
Inclusive and Invoice Formulas
Inclusive Taxable Value = After Item Discount ÷ (1 + GST %)
Inclusive GST = After Item Discount − Inclusive Taxable Value
Invoice Discount = Taxable Base × Invoice Discount % + Fixed Discount
Total Taxable = Goods Taxable + Freight Taxable
Grand Total = Goods Total + Freight Total + Other Charges + Rounding Adjustment
Balance Due = Grand Total − Paid Amount
- Enter invoice details like number, date, party name, and invoice type.
- Choose intra-state for CGST and SGST, or inter-state for IGST.
- Select whether your entered prices already include GST.
- Add line items with quantity, unit price, discount percentage, and GST rate.
- Enter invoice-wide discounts, freight, extra charges, rounding, and paid amount.
- Press Calculate GST Invoice to view the result above the form.
- Use the CSV and PDF buttons to export the summary.
- Review the chart, tax split, and balance due before saving the invoice.
1) What is the difference between GST-inclusive and GST-exclusive pricing?
GST-exclusive pricing adds tax after the taxable value is computed. GST-inclusive pricing already contains the tax inside the entered price, so the calculator extracts taxable value and GST from that amount.
2) When should I use CGST and SGST instead of IGST?
Use CGST and SGST for intra-state invoices where supplier and buyer are in the same state. Use IGST for inter-state transactions where both parties are in different states.
3) Does the calculator support both goods and services?
Yes. Each row can represent a product or a service. Enter description, quantity, unit price, discount percentage, and GST rate for every billable line item.
4) How is invoice-level discount applied here?
The calculator applies invoice-level discount to the total taxable value of goods and distributes that discount proportionally across all item rows before recalculating GST on the reduced taxable values.
5) Can freight charges also be taxed?
Yes. Enter freight amount and a freight GST rate. The calculator treats freight as a taxable component and includes its GST in the total invoice tax calculation.
6) What does rounding adjustment do?
Rounding adjustment lets you add or subtract a small amount after all taxes and charges are calculated. It helps match practical invoice totals used in final billing.
7) Why does the balance due become negative sometimes?
A negative balance due means the paid amount is greater than the grand total. That usually represents advance payment, change to return, or credit carried forward.
8) Can I export the calculated result?
Yes. After calculation, use the CSV button for spreadsheet-friendly data and the PDF button for a print-ready summary of your line items and invoice totals.