Invoice Calculator
Calculate subtotals, tax, discounts, and totals for clean professional invoices.
Invoice Summary
📋 Item Breakdown
💡 Invoice Tips
- • Include itemized details for transparency
- • Specify payment terms (Net 30, Net 60, etc.)
- • Apply early payment discounts to encourage faster payments
- • Include your business details and invoice number
- • Add payment methods and contact information
- • Consider adding a late payment policy
📈 Pricing Tips
Cost-Plus Pricing: Calculate cost + desired profit margin
Value-Based Pricing: Price based on customer value perception
Competitive Pricing: Research competitor rates and adjust
Bundle Pricing: Offer discounts for multiple items
How it works
Invoice Calculation: Total = Subtotal - Discount + Tax Where: Subtotal = Sum of (Quantity × Rate) for all items Discount = Subtotal × (Discount % / 100) OR Fixed Amount Tax = (Subtotal - Discount) × (Tax Rate / 100) Example: Item 1: 5 hours × $50/hour = $250 Item 2: 10 units × $10/unit = $100 Subtotal = $350 Discount (10%) = -$35 Subtotal after discount = $315 Tax (8%) = $25.20 Total Due = $340.20
The invoice calculator helps you create itemized invoices with multiple line items, discounts, and tax calculations. Add or remove items, specify quantities and rates, apply discounts and taxes, and copy the invoice summary. Includes per-item breakdown and business pricing tips.
Why this matters
Professional invoices are essential for getting paid on time and maintaining clear business records. Accurate calculations ensure customers understand the charges and prevent billing disputes. Itemized invoices provide transparency and help with tax documentation.
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The complete guide to invoice calculator
Formulas, examples, and tips explained in plain English