TToolKing
Business

Invoice / Tax (VAT) Calculator

A 5% business tax (VAT) calculator for Taiwan. Convert net-to-gross, gross-to-net and break out the tax amount — useful for quotes, invoicing and reconciliation. Instant and copyable.

Net
1,000
Tax (5%)
50
Gross
1,050

Based on Taiwan's 5% business tax, rounded to the nearest unit. Follow your accounting rules for official issuance.

Editor note

  • Invoice / Tax (VAT) Calculator is useful for quick estimates. Before sending quotes, invoices or contract numbers, compare them with the actual records.
  • For tax, accounting or legal impact, get a professional check before you rely on the numbers.

Good to know

Stop mixing up net and gross

Taiwan's business tax is 5%. The common slip is working back from a tax-inclusive figure: net = gross ÷ 1.05 and tax = net × 5%, not some ad-hoc shortcut. When you quote, reconcile invoices or confirm an amount with a client, getting the direction wrong throws off the whole document.

Quoting and billing in practice

State up front whether a quote is tax-inclusive or exclusive to avoid disputes later, and make sure the amount and tax line up when you issue an invoice. This tool is for a quick check while quoting, billing or reconciling — official bookkeeping still follows your actual invoices and accounting rules.

Use it with the quotation template

Once the numbers are right, drop them into our quotation template (it already has net subtotal, 5% tax and tax-inclusive total columns), download as a spreadsheet and hand it to the client — no need to build the formulas yourself.

How to use

  1. 1Choose the direction (net→gross or gross→net).
  2. 2Enter the amount.
  3. 3The net, tax (5%) and gross total are calculated automatically.
  4. 4Copy the result into your quote or invoice.

FAQ

Can I change the tax rate?

It defaults to Taiwan's 5% business tax; a custom rate option is coming for other scenarios.

How is net derived from gross?

Net = gross ÷ 1.05, and tax = gross − net. The tool rounds automatically.

Are amounts rounded?

Yes, to the nearest whole unit by common practice. For official issuance, follow your accounting rules.

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