"Net 15" is a payment term used in business transactions that indicates the buyer must pay the full invoice amount within 15 days of the invoice date. This term is often used to encourage prompt payment and improve cash flow for the seller. When a seller issues an invoice with "Net 15," it means that the buyer has a short window to settle the payment without incurring any late fees. This practice is common in various industries, including retail, construction, and services, helping businesses manage their finances effectively.