Sales Tax & VAT Calculator

Add standard sales tax to a net price, or reverse-calculate VAT from a GST-inclusive total — with Pakistan's further tax for non-filers where it applies.

The amount is the pre-tax price — tax and further tax are added on top.

Standard 18% + 3% further tax on specified supplies for non-filers.

Tax added to the price

Amount before tax Rs 10,000
Sales tax (18%) Rs 1,800
Further tax (3%) Rs 300
Total to pay Rs 12,100

Standard vs reverse sales tax maths

Two numbers matter when quoting or invoicing: the net (pre-tax) price and the gross (tax-included) total. With add tax mode you set the net and the calculator produces the gross; with reverse mode you feed it a receipt total and it recovers the base and the tax, using base = total ÷ (1 + rate). At Pakistan's standard 18% a Rs 1,180 gross price reverses to a Rs 1,000 base and Rs 180 tax.

For non-filer buyers on specified supplies, FBR imposes a further tax of 3% on top of the standard sales tax — effectively 21% combined. Registering as a filer and quoting a valid NTN on the invoice is usually the cleanest way to avoid the extra charge, and it is always worth confirming the current Finance Act figures before relying on them in a bill.

Frequently asked questions

What is the difference between adding and reverse-calculating sales tax?

Adding tax goes net → gross. Reverse calculation goes gross → base + tax, which is how you find the hidden tax inside a GST-inclusive receipt.

What is the further tax in Pakistan?

Non-filers pay an additional 3% further tax on specified supplies, on top of the standard 18% sales tax. Filer buyers with a registered NTN usually avoid it.

How do I work out the pre-tax price from a GST-inclusive amount?

Divide the total by (1 + rate). At 18% that means total ÷ 1.18 — Rs 1,180 inclusive becomes Rs 1,000 base plus Rs 180 tax.

Are these tax rates up to date?

Rates match each regime's published standards (18% Pakistan, 20% UK, 5% UAE, 15% KSA), verified on 29 September 2026. The Custom rate lets you enter anything as Finance Acts change.

How is this different from the GST/VAT calculator?

This tool adds the reverse calculation, the further-tax option for Pakistani non-filers, and named regimes. The GST/VAT calculator is the entry version for simple net/gross percentages.

Taxing invoices the correct way, every time

Our Digital Invoice System applies customer sales tax and further tax automatically, prints the amount-in-words line, and keeps payment records — no more Excel guesswork.

Digital Invoice System Simple GST / VAT calculator

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