To calculate an invoice total: Subtotal = Sum of (Quantity × Unit Price) for all line items. Tax = Subtotal × Tax Rate%. Total = Subtotal + Tax - Discount. Essential for freelancers and small businesses creating accurate invoices.
📂 Finance
🧾 Invoice Calculator
Calculate invoice totals including multiple line items, tax, and discounts. Perfect for freelancers and small businesses creating client invoices.
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✨ Your Result
🦉Owl's Explanation
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Fill in the values above and click Calculate ✨
✅ Trusted Tool
Free invoice calculator for freelancers and small businesses. No sign-up needed.
🤔 How Does This Work?
Subtotal = Σ(Quantity × Price) for all items
After discount = Subtotal × (1 - Discount%)
Total = After discount + (After discount × Tax%)
❓ Frequently Asked Questions
How do I calculate tax on an invoice?▼
Multiply the subtotal (after any discount) by the tax rate as a decimal. If subtotal is 100,000 and tax rate is 15%, tax = 100,000 × 0.15 = 15,000. Total = subtotal + tax = 115,000.
Should discount be applied before or after tax?▼
Standard practice: apply discount first, then calculate tax on the discounted amount. This is how most accounting systems and tax authorities expect invoices to be structured.
Multiply the subtotal (after any discount) by the tax rate as a decimal. If subtotal is 100,000 and tax rate is 15%, tax = 100,000 × 0.15 = 15,000. Total = subtotal + tax = 115,000.
Should discount be applied before or after tax?▼
Standard practice: apply discount first, then calculate tax on the discounted amount. This is how most accounting systems and tax authorities expect invoices to be structured.