Calculator guide
Who this calculator is for
Small businesses, freelancers, accountants, and consumers globally who need to quickly calculate tax-inclusive or tax-exclusive prices.
Add global GST/VAT rates to a net amount, or extract the base amount from a gross receipt.
Formula used
Add Tax (Exclusive): Gross Amount = Net Amount + (Net Amount × Tax Rate). Remove Tax (Inclusive): Net Amount = Gross Amount / (1 + Tax Rate).
The calculator keeps the math visible so users can understand what changed when they adjust rate, time, contribution, tax rate or loan amount.
Example: £100 item with 20% UK VAT (Exclusive)
How to get a useful result
For the best estimate, use realistic rates, verify lender or tax assumptions, and run at least one conservative scenario. This makes the page more useful than a bare calculator and helps visitors stay longer because they can compare outcomes instead of leaving after one number.
Frequently asked questions
GST stands for Goods and Services Tax. It is a broad-based consumption tax levied on the sale of goods and services in many countries, including Australia, New Zealand, Canada, and India.
VAT stands for Value-Added Tax. It is functionally identical to GST but is the preferred terminology in the European Union, the United Kingdom, and many other nations.
Practically, there is no difference for the end consumer. Both are indirect consumption taxes applied to the value added at each stage of the supply chain.
To add tax (exclusive mode), multiply your base amount by the tax rate. For example, to add 10% GST to $100: $100 × 0.10 = $10 tax. Total = $110.
To remove tax (inclusive mode), divide the total amount by (1 + tax rate). For example, to find the base price of a $110 item with 10% GST: $110 / 1.10 = $100.
Because the percentage was originally applied to the smaller base number, not the larger total. Subtracting 10% from $110 gives $99, which is incorrect. You must divide by 1.10.
The standard Goods and Services Tax (GST) rate in Australia is 10%.
The standard Value Added Tax (VAT) rate in the United Kingdom is 20%. There is also a reduced rate of 5% and a zero rate for certain goods.
India uses a multi-tiered GST system with standard rates of 5%, 12%, 18%, and 28%, depending on the category of goods or services.
The standard GST rate in New Zealand is 15%.
HST stands for Harmonized Sales Tax. In some Canadian provinces, the federal GST and provincial PST are combined into a single HST rate (often 13% or 15%).
An inclusive price means the tax is already baked into the final sticker price. You pay exactly what you see.
An exclusive price means the tax will be added on top of the sticker price at checkout.
Businesses collect GST/VAT on their sales and pay GST/VAT on their purchases. They remit the difference to the government. This is why tax-exclusive pricing is often used in B2B transactions.
If you are a registered business, you can usually claim back the GST/VAT you paid on business expenses against the GST/VAT you collected from customers.
Yes, most countries exempt basic necessities like unprocessed food, healthcare, and education from consumption taxes.
Registration thresholds vary by country. For example, in the UK, you must register if your taxable turnover exceeds £90,000. In Australia, the threshold is $75,000 AUD.
No, the United States uses a decentralized Sales Tax system determined by individual states and municipalities, rather than a federal VAT.
Incorrect tax calculations can lead to underpaying the government (resulting in fines) or overcharging clients (damaging relationships). Always verify with a calculator.
Select the Global/Custom option from the country selector and manually type any percentage into the tax rate field.