Sales Tax Calculator
Calculate price with tax, without tax, and tax amount with custom tax rate
How to Use
- Select calculation mode: "Pre-tax → Post-tax" or "Post-tax → Pre-tax"
- Enter the amount
- Enter the tax rate percentage (default 5% for Taiwan VAT)
- Click "Calculate" to see the pre-tax amount, tax amount, and post-tax amount
FAQ
What is the sales tax rate in Taiwan?
Taiwan's Value Added Tax (VAT) rate is 5%, which is the default rate in this calculator. Some special industries have different rates, such as 2% for banking and insurance, and 15% for nightclubs and restaurants with entertainment.
What is the relationship between pre-tax and post-tax prices?
Post-tax price = Pre-tax price x (1 + tax rate). For example, if an item costs $100 pre-tax with a 5% tax rate, the post-tax price is 100 x 1.05 = $105. Conversely, $105 post-tax ÷ 1.05 = $100 pre-tax.
Are invoice amounts tax-inclusive or tax-exclusive?
In Taiwan, uniform invoice amounts are typically tax-inclusive. Triplicate invoices (B2B) itemize the pre-tax amount, tax amount, and total separately. Duplicate invoices (B2C) usually show only the tax-inclusive total.