Glossary
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Quantity

Quantity

The number of units of a product or service being billed—how many items or hours are included on an invoice line.

What is quantity?

Quantity on an invoice indicates how many units you're billing for. This might be hours worked, items delivered, square feet installed, or any other measurable unit. Multiplied by the unit price, quantity determines the line item total.

Quantity on invoices

A typical invoice line shows:

  • Description — What you're billing for
  • Quantity — How many units
  • Unit price — Cost per unit
  • Amount — Quantity × unit price

Example: Consulting hours | 8 | $150 | $1,200

Tracking quantities accurately

Accurate quantity tracking matters for both billing and your own job costing. If you bill hourly, track time carefully. If you bill by unit, count accurately. Disputes often arise from disagreements about quantities—clear records protect you.

Bill for every unit

Invoicer makes it easy to add line items with quantities and prices.

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