Invoice Payment Terms in the USA: Complete Guide (2026)

Choosing the right payment terms on your invoice is one of the easiest ways to get paid faster. In the United States, freelancers and small businesses have wide flexibility in setting their own terms — but some choices consistently outperform others.

Most common US invoice payment terms

• Net 30 — Payment due within 30 calendar days of the invoice date. The most widely used term in B2B invoicing.
• Net 15 — Payment due within 15 days. Faster than Net 30 and increasingly common for freelancers.
• Net 7 — Payment due within 7 days. Common for small jobs or clients with fast payment systems.
• Due on receipt — Payment expected immediately upon receiving the invoice. Best for retail or one-time clients.
• 2/10 Net 30 — 2% discount if paid within 10 days; full amount due within 30. Encourages faster payment.

What payment terms actually get you paid fastest?

Data from invoice management platforms consistently shows that shorter terms = faster payment. Net 15 invoices are paid on average 8 days faster than Net 30. 'Due on receipt' invoices are paid within 14 days on average, faster than Net 30 but not always faster than Net 15.

The most important factor is being specific. 'Payment due within 30 days' is clearer than 'Net 30' for clients unfamiliar with invoicing terminology.

Late payment fees — are they legal in the USA?

Yes. In all 50 US states, you can charge a late payment fee as long as it was communicated before the work began. Best practice: include late fee terms in your contract or on the invoice itself.

• Standard late fee: 1.5% per month (18% annually) — this is widely used and rarely contested
• Flat fee option: $25–50 flat fee for invoices under $1,000
• The fee must be stated on the invoice or in your contract to be enforceable
• Some states cap late fees — check your state's commercial law if you're charging above 1.5%/month

Invoice payment terms for different business types

Freelancers (designers, writers, developers)

Net 15 or Net 7 are standard. For new clients, always require a 30–50% deposit before starting work. Add '1.5% per month late fee after due date' to every invoice.

Small businesses and contractors

Net 30 is the industry standard for B2B work. For large projects, use milestone invoicing — invoice at project start, midpoint, and completion. This protects your cash flow on jobs that run for weeks or months.

Retail and service businesses

Due on receipt is standard. Most point-of-sale transactions are immediate. For ongoing service clients (landscaping, cleaning, IT support), Net 15 is common.

How to collect on a late US invoice

1. 1Send a friendly reminder the day the invoice is due
2. 2Send a firmer reminder 7 days after the due date, referencing the invoice number
3. 3At 30 days overdue: send a formal demand letter via email and certified mail
4. 4At 60 days overdue: consider a collections agency (typically takes 25–50% of collected amount) or small claims court
5. 5Small claims court limits vary by state: $2,500–$25,000