GST & Sales Tax Calculator
Compute Goods and Services Tax (GST) or general sales tax both inclusive and exclusive of baseline price.
Understanding GST and Sales Tax
Goods and Services Tax (GST) and Value Added Tax (VAT) are consumption taxes levied on the supply of goods and services at each stage of the supply chain.
Formulas
- Exclusive Tax: Tax Amount = Amount × (Rate / 100) | Total = Amount + Tax
- Inclusive Tax: Tax Amount = Amount - [Amount / (1 + Rate / 100)] | Net Base = Amount - Tax
Worked Example
Calculating 18% GST on a $1,000 baseline item:
- Exclusive: Tax is $180, Total invoice price is $1,180.
- Inclusive: On a $1,000 retail sticker, Net Price is $847.46 and built-in tax is $152.54.
Frequently Asked Questions
What does tax exclusive mean?
Tax exclusive means the listed price reflects only the base product cost, and applicable taxes are calculated and added at checkout.
What does tax inclusive mean?
Tax inclusive indicates that the advertised price already includes all statutory sales and consumer taxes.
Can business owners reclaim GST?
Registered businesses can claim Input Tax Credit (ITC) on taxes paid for business purchases against their outgoing sales tax liability.
Does this work for state and local sales tax?
Yes. Enter the combined total of state, county, and municipal sales taxes in the rate field.
Calculate in three steps
- 1Enter your valuesUse the fields above and check the units shown beside each input.
- 2Run the calculationSelect Calculate to refresh the result with your latest values.
- 3Review or shareCompare the result, reset the form, print it, or share this page.