VAT calculator — remove VAT from an inclusive amount, or add it

Removing VAT is a division, never a subtraction

This is the defining error of the category, and it is published on pages that rank. If an amount already includes VAT you cannot multiply it by the rate, and you cannot take the rate off it. VAT is a percentage of the amount before tax, not of the inclusive total.

The correct formula is: amount before VAT = inclusive total ÷ (1 + rate). The VAT is then the difference. At 15%: 1,150 ÷ 1.15 = 1,000 before VAT, so the VAT is 150. Multiplying 1,150 by 15% would give 172.50 — overstating the tax by 22.50 that nobody ever paid.

The shortcut that gives the same answer is VAT = inclusive × rate ÷ (100 + rate). At 15% that factor is 15 ÷ 115 = 0.130434…, not the 0.13 that one widely-ranked Arabic calculator recommends in its FAQ. On SAR 50,000 the difference is over 21 riyals.

Why Bahrain and Oman show three decimals

The Bahraini dinar, Omani rial and Kuwaiti dinar have a thousand minor units, not a hundred: one dinar is 1,000 fils, one rial is 1,000 baisa. Their amounts are written to three decimal places, the same way a Saudi riyal is written to two.

We surveyed twelve online VAT calculators. Not one returns a Bahraini or Omani figure to three decimals — they all round to two, and the fils and baisa disappear. One of them offers a "Bahrain 10%" preset while its currency list contains no Bahraini dinar at all.

This calculator uses each currency’s own precision. A Bahraini example: BHD 12.345 plus 10% is 1.235 VAT and 13.580 total. Rounded to two decimals it would read 1.23 and 13.58 — two figures that will not match books kept in fils.

The three figures always reconcile

The calculator always shows the amount before VAT, the VAT and the inclusive total together, so you never have to derive the missing one. More importantly, they always add up: before VAT + VAT = total, for every amount, every rate and every currency.

That is less obvious than it sounds. Four of the calculators we surveyed publish worked examples that do not reconcile. One of them, on a page titled for the UAE’s 5%, takes an inclusive AED 200 and reports VAT of 26.09 with a net of 173.48 — which sum to 199.57, not 200 — while using Saudi Arabia’s 15% rate throughout.

The cause is rounding all three figures independently, which can break the link between them. Here the amount you typed is preserved exactly, the VAT is rounded, and the third figure is derived from those two — so the column cannot fail to add up.

Why removing VAT is the operation people actually search for

It is not an accident that "extract the VAT from the amount" outranks "add VAT" in Arabic search. The reason is regulatory: Saudi Arabia’s Ministry of Commerce states that the price shown on the shelf must be VAT-inclusive, and must match both what the till charges and the purchase invoice.

The ministry gives a worked example — a good tagged at SAR 100 must produce a final invoice of no more than SAR 100 — and distinguishes two complaints: a commercial report to the ministry where a price tag is missing or disagrees with the till, and a report to the tax authority where a shop adds tax on top of the displayed price.

So the number a Saudi consumer sees is, by rule, the gross figure. Anyone wanting to know the tax inside it needs to remove it rather than add it, which is why this calculator opens in remove mode.

VAT, value added tax, or just "the tax"?

One name, three uses. The formal term is "value added tax", which is what the authorities use in their laws and regulations. In everyday speech people shorten it — in Arabic to «الضريبة المضافة», and often to «الضريبة» alone where the context is obvious.

So someone searching for "calculate the tax", someone searching for "added tax calculator", and someone searching for the full formal name all want the same thing: how much tax is inside this amount, or what the amount becomes once it is added. This page answers both.

In English it contracts to VAT, the initials of Value Added Tax. You will find both forms on Gulf invoices, because a Saudi tax invoice must be in Arabic and may carry a translation alongside it.

How to remove VAT on an ordinary calculator

Adding is easy on any calculator: multiply by 1.15 at 15%. Removing is the direction that trips people up, and it is three steps.

Divide the inclusive amount by 1.15 to get the amount before tax. Subtract that from the inclusive amount to get the tax. Worked: 1,150 ÷ 1.15 = 1,000, and 1,150 − 1,000 = 150.

For other rates, change the divisor: 1.05 for the UAE and Oman, 1.10 for Bahrain. And do not multiply the inclusive amount by the rate directly — that is the most common error in this calculation, and it returns more than the real tax.

I only know the VAT amount — how do I get the other two?

This is the third case most calculators ignore: you have the tax figure on its own, from a return or a line in a statement, and you want the net and the gross.

The amount before tax is the tax divided by the rate. At 15%: 150 ÷ 0.15 = 1,000 before tax, so 1,150 in total. At 5%: 50 ÷ 0.05 = 1,000 before tax, so 1,050 in total.

To check it in the tool above, enter the net figure you derived and use add mode — if the three figures reconcile, your derivation was right.

It runs in your browser, and the figures stay on your device

No server receives your amounts. The whole calculation happens in the browser using exact decimal arithmetic on integers rather than floating-point numbers — which is what makes a value like 1.005 round correctly instead of slipping to 1.00, as it does in ordinary floating-point code.

In practice that means the tool works offline once the page has loaded, needs no account or email address, and has no usage limit.

This calculator does not decide whether your transaction is taxable

It is a calculation tool: it applies the rate you choose to the amount you enter. Whether a supply is standard-rated, zero-rated, exempt or out of scope depends on the rules in your country and on the nature of the transaction.

The authorities themselves keep those four treatments apart. Bahrain’s NBR states outright that some transactions are outside the scope of VAT — fines and compensation among them — and that exempt is not the same as zero-rated. Oman’s Tax Authority publishes separate guides for real estate, education, healthcare, financial services and e-commerce.

So you will not find a promise here that we will work out your VAT for you. Choose the rate that applies to your transaction, and we will make sure the arithmetic is right to the last fils.