What Are Payment Terms?
Payment terms are the conditions a seller sets for when and how an invoice must be paid. They define the payment window, any discount for paying early, penalties for paying late, and the accepted payment methods. Terms are agreed before the sale and restated on the invoice itself.
Common Payment Terms Explained
- Net 7, Net 10, Net 15:
payment due within 7, 10, or 15 days of the invoice date. Common for smaller suppliers and new customer relationships. - Net 30:
payment due within 30 days. The most widely used commercial term in the US. - Net 45, Net 60:
extended terms typical of larger buyers with negotiating leverage. - Net 90:
unusual outside large enterprise and government contracts, and a significant working capital cost to the supplier. - EOM:
end of month. Payment due at the close of the month the invoice was issued. - 15 MFI:
15th of the month following invoice, which groups invoices into a predictable monthly run. - 2/10 Net 30:
a 2% discount if paid within 10 days, otherwise the full amount at 30 days. - CIA:
cash in advance. Payment required before goods ship. - COD:
cash on delivery. Payment collected when goods arrive. - Due on receipt:
payment expected immediately, with no credit period at all.
What Net 30 Means
Net 30 means the full invoice amount is due within 30 days. The word 'net' signals that no discount applies to the amount: it is the settled sum after any deductions already applied on the invoice.
The ambiguity that causes most disputes is what day 30 counts from. Invoice date is the common default, but some agreements count from delivery date, from receipt of invoice, or from month end. A supplier counting from invoice date and a buyer counting from receipt can be a week apart on the same invoice, with neither party doing anything wrong.
EXAMPLE
An invoice dated March 3 that arrives March 11 on net 30 terms is due April 2 if counted from invoice date, or April 10 if counted from receipt. Stating the basis explicitly on the invoice removes the disagreement.
Early Payment Discount Terms
Discount terms are written as a three-part expression: discount percentage, the days to qualify for it, and the full net period. In 2/10 net 30, a buyer paying within 10 days takes 2% off, and otherwise owes the full amount by day 30.
Whether to take the discount is an interest-rate question, not a cash-flow preference. Skipping a 2% discount to hold cash 20 extra days is expensive borrowing:
FORMULA
Annualized Cost = (Discount % ÷ (100 − Discount %)) × (365 ÷ (Net Days − Discount Days))
EXAMPLE
For 2/10 net 30: (2 ÷ 98) × (365 ÷ 20) = 37.2% annualized. Unless the business is borrowing at a higher rate than that, paying on day 10 is the better decision.
Advance and Immediate Payment Terms
Not every arrangement extends credit. Several terms require payment at or before delivery, and they are standard for new customers, custom manufacturing, and international trade where credit risk is hard to assess.
- Cash in advance (CIA):
full payment before production or shipment begins. - Partial advance:
a deposit, commonly 30% to 50%, with the balance due on delivery or shipment. - Cash on delivery (COD):
payment collected at the point goods are handed over. - Cash with order (CWO):
payment accompanies the purchase order itself. - Letter of credit:
a bank guarantees payment on presentation of shipping documents, used in international trade.
From the buyer's side these terms carry a working capital cost: cash leaves before the goods generate revenue, which lengthens the cash conversion cycle. Moving a supplier from CIA to net 30 is often worth more than negotiating a small price reduction.
Writing Payment Terms on an Invoice
Terms should appear on the invoice in unambiguous language, not only in the underlying contract. Effective wording states the period, the basis, the due date, and the consequence of late payment.
EXAMPLE
Weak: 'Payment terms: 30 days'
Better: 'Net 30. Payment due within 30 days of invoice date. Due date: 2 April 2026. A late fee of 1.5% per month applies to overdue balances.'
Stating the calculated due date as an actual date removes the counting-basis ambiguity entirely, and it is the single change most likely to reduce payment disputes.
How Payment Terms Affect Cash Flow
Payment terms are the main lever a business has over the timing of cash in and out. Terms extended to customers drive days sales outstanding; terms negotiated with suppliers drive days payable outstanding. The gap between them determines how much working capital the business has to fund itself.
EXAMPLE
A distributor giving customers net 45 while paying suppliers on net 30 funds a 15-day gap out of its own cash. Renegotiating supplier terms to net 45 closes it without changing a single price.
The limit is that extending supplier terms too far forfeits early payment discounts, which as shown above frequently cost more annualized than the cash is worth, and it strains relationships with suppliers who may respond by tightening terms or deprioritizing the account.
Frequently Asked Questions About Payment Terms
1. What are payment terms?
Payment terms are the conditions a seller sets for when and how an invoice must be paid, including the payment window, any early payment discount, late payment penalties, and accepted payment methods. They are agreed before the sale and restated on the invoice.
2. What does net 30 payment terms mean?
Net 30 means the full invoice amount is due within 30 days. The common ambiguity is what day 30 counts from: invoice date is the usual default, but some agreements count from delivery, receipt of invoice, or month end, which can put the parties a week apart.
3. What are the most common types of payment terms?
Net 30 is the most widely used in the US, alongside net 7, 10, 15, 45, 60, and 90. Others include EOM (end of month), 15 MFI (15th of the following month), due on receipt, COD (cash on delivery), and CIA (cash in advance).
4. What does 2/10 net 30 mean?
A 2% discount applies if the invoice is paid within 10 days, otherwise the full amount is due at 30 days. Declining the discount to hold cash 20 extra days costs roughly 37% annualized, so it is usually worth taking unless borrowing costs exceed that.
5. What do CIA and COD payment terms mean?
CIA is cash in advance: full payment before production or shipment. COD is cash on delivery: payment collected when goods arrive. Both are common for new customers, custom manufacturing, and international trade where credit risk is difficult to assess.
6. How do you write payment terms on an invoice?
State the term, the counting basis, the calculated due date, and the late payment consequence. For example: 'Net 30. Payment due within 30 days of invoice date. Due date: 2 April 2026. A late fee of 1.5% per month applies to overdue balances.'
7. How do payment terms affect cash flow?
Terms given to customers drive days sales outstanding and terms negotiated with suppliers drive days payable outstanding. The gap between the two is working capital the business funds itself, so aligning them frees cash without changing any prices.
