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GST calculator

Add Pakistan's 18% GST (General Sales Tax) to a price, or do it in reverse — take the tax out of a GST-inclusive total to see the price before tax and how much of it is tax. Works for any rate and any currency.

1Price and tax
%

Pakistan's standard GST is 18%. Change it for a reduced rate or another country.

For "Add GST", enter the price before tax. For "Remove GST", enter the total that already includes tax.

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  • GST rate (%)
  • Amount
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How to add or remove GST

  1. 1Choose whether to add GST to a price or remove it from a GST-inclusive total.
  2. 2Enter the GST rate — 18% for Pakistan's standard sales tax.
  3. 3Enter the amount: the price before tax (to add GST) or the total with tax (to remove it).
  4. 4Read the GST amount, the price before tax and the price including tax.

GST formula (add and reverse)

  1. 01r = GST rate ÷ 100
  2. 02Add GST: tax = net × r · total = net × (1 + r)
  3. 03Remove GST: net = total ÷ (1 + r) · tax = total − net
  4. 04The tax hidden in a total is total × r ÷ (1 + r) — at 18%, that is total × 18 ÷ 118

GST (General Sales Tax) is a tax added to the price of most goods in Pakistan. The standard rate has been 18% since 2023. To add it, multiply the price before tax by the rate — 18% of 1,000 is 180 — and add it on, giving a total of 1,180.

Going the other way is the part people get wrong. If a price already includes 18% GST, you cannot just take 18% off the total to find the original price. The total is 118% of the net price, so you divide by 1.18: a 1,180 total was 1,000 before tax, and 180 of it is GST. The tax inside a GST-inclusive total is total × 18 ÷ 118.

The same method works for any rate — change the 18% for a reduced rate, a provincial services tax, or VAT in another country.

GST calculation example

Adding 18% GST to a 1,000 price gives 180 of GST.

So the price including GST is 1,180.

Good to know

  • To find the tax inside a price that already includes 18% GST, multiply the total by 18 and divide by 118 — not by 0.18.
  • A shop price shown as "GST inclusive" already has the tax in it; use "Remove GST" to see the amount before tax.
  • Change the rate for a different tax — for example a provincial sales tax on services, or another country's VAT.
  • For a tax invoice, the net price plus the GST amount should equal the total shown to the customer.

GST calculator — common questions

What is the GST rate in Pakistan?

The standard General Sales Tax rate is 18%, in force since 2023 under the Sales Tax Act 1990 and collected by the FBR. Some goods have reduced rates, and provinces charge their own sales tax on services (around 13–16%).

How do I add 18% GST to a price?

Multiply the price before tax by 0.18 to get the GST, then add it on. For a 1,000 price: GST is 180, and the total including GST is 1,180.

How do I remove GST from a price that already includes it?

Divide the GST-inclusive total by 1.18 to get the price before tax; the difference is the GST. A 1,180 total becomes 1,000 before tax, with 180 of GST. Taking 18% off the total instead gives the wrong answer.

How much GST is in a 1,180 rupee price?

If the 1,180 already includes 18% GST, the tax is 1,180 × 18 ÷ 118 = 180, and the price before tax is 1,000.

Can I use this for other tax rates?

Yes. Change the rate box to any percentage — a reduced GST rate, a provincial services tax, or VAT in another country — and the add and remove calculations still work.

Sources

Formulas last reviewed: September 30, 2026 ·How we check our formulas

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