What Is Net 30? Payment Terms Explained

Net 30 is one of the most common payment terms in business invoicing. It means that the full invoice amount is due within 30 days of the invoice date. Simple in concept, but there are several nuances worth understanding before you put it on your next invoice or sign a contract that uses it.

What Net 30 Means

"Net" in this context means the total amount owed, the net amount due. "30" refers to the number of days the buyer has to pay. So Net 30 means: pay the full invoice total within 30 days of the invoice date.

Those 30 days are traditionally calendar days, not business days. An invoice dated April 1 with Net 30 terms is due May 1. Most standard supplier agreements, purchase orders, and vendor contracts follow this convention.

Calendar Days vs Business Days for Net 30

The traditional interpretation of Net 30 is 30 calendar days. However, service-based contracts, particularly in consulting, legal work, staffing, and creative services, sometimes specify "Net 30 business days" instead. That works out to approximately 42 calendar days, or about six calendar weeks.

If your contract simply says "Net 30" without specifying calendar or business days, the default assumption in most US commercial contexts is calendar days. If you are unsure, clarify it in writing before invoicing.

You can use the Net 30 Calculator to find the exact due date from any invoice date, with options for both calendar and business day counting.

Early Payment Discounts: 1/10 Net 30

You may see payment terms written as "1/10 Net 30" or "2/10 Net 30." This notation means the buyer can take a small discount if they pay early. "1/10 Net 30" means: take a 1% discount if you pay within 10 days; otherwise the full amount is due in 30 days. "2/10 Net 30" offers a 2% discount for payment within 10 days.

For buyers with cash on hand, these discounts represent a significant annualised return and are usually worth taking. For sellers, offering an early payment discount accelerates cash flow at a modest cost.

Net 30 EOM

"Net 30 EOM" means the 30-day period starts at the end of the month in which the invoice was issued, not from the invoice date itself. An invoice dated April 10 with Net 30 EOM terms is not due until May 30, which is 30 days after April 30. This variation is common in wholesale and manufacturing supply chains.

How Net 30 Compares to Other Terms

Net 30 is the most common standard for small and mid-sized business transactions. Net 60 and Net 90 are used when larger transaction sizes, longer supply chains, or buyer leverage make extended terms the norm. Immediate payment terms are written as "Net 0" or "Due on receipt." For a full comparison, see the guides on Net 60 and Net 90.

FAQ

Does Net 30 mean 30 business days or 30 calendar days?

Net 30 traditionally means 30 calendar days. If a contract specifies business days, it will usually say "Net 30 business days" explicitly. When in doubt, the default assumption in most US commercial contracts is calendar days.

When does the 30-day period start?

It starts on the invoice date unless the contract specifies otherwise. Some agreements start the clock on the date the goods are delivered or the service is completed rather than the invoice date. Check your contract.

What happens if the due date falls on a weekend or holiday?

Most contracts and conventions roll the due date forward to the next business day. Confirm this with your counterparty if the contract does not address it explicitly.

Is Net 30 legally enforceable?

Yes, if it is written into a signed contract or agreed to in writing. In the US, late payment rules vary by state. Putting your payment terms clearly on every invoice and in your client agreement is the best protection.