# GST inclusive vs exclusive (and UK VAT)

> Same arithmetic as VAT. India then splits the tax for intra-state invoices.

Live HTML: https://plaintools.io/guides/gst-inclusive-vs-exclusive

Updated: 2026-09-07

## Two directions

Exclusive: you know the taxable value. Tax = net × rate/100. Gross = net + tax. Inclusive: you know the shelf price. Net = gross / (1 + rate/100). Tax = gross − net.

Indian GST uses this for every slab (0, 5, 12, 18, 28% illustratively). UK VAT uses the same two directions at 20%, 5%, or 0%. The difference is how the tax line is labelled, not the algebra.

| Mode | You type | You get |
| --- | --- | --- |
| GST/VAT exclusive | Net 10,000 at 18% | Tax 1,800; gross 11,800 |
| GST/VAT inclusive | Gross 11,800 at 18% | Net 10,000; tax 1,800 |
| UK VAT exclusive | Net £100 at 20% | VAT £20; gross £120 |
| UK VAT inclusive | Gross £120 at 20% | Net £100; VAT £20 |

## CGST, SGST, IGST

Intra-state Indian supplies split GST in half: CGST and SGST (or UTGST). Inter-state is IGST at the full rate. UK VAT does not split that way. Do not put CGST on a UK invoice.

## Rounding

This site rounds each money line to two decimals and, for intra-state GST, assigns the leftover paisa so CGST + SGST equals total GST. Your accounting package may round the invoice differently. That is why this is an estimate, not a filed return.

## FAQs

### Which calculator should I use?

Indian GST invoices: GST calculator (jurisdiction + slabs). UK VAT invoices: UK VAT calculator (single rate). Do not mix them.

## Related tools

- [GST calculator](https://plaintools.io/finance/gst-calculator.md) — HTML: https://plaintools.io/finance/gst-calculator
- [UK VAT calculator](https://plaintools.io/finance/uk-vat-calculator.md) — HTML: https://plaintools.io/finance/uk-vat-calculator
- [EMI calculator](https://plaintools.io/finance/emi-calculator.md) — HTML: https://plaintools.io/finance/emi-calculator

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