Payment terms are the rules for when and how the invoice gets paid
Payment terms are the agreement between you and the person or business you've invoiced about when they owe you the money and how they should send it. They sit on the invoice itself, usually near the due date, and they matter because they control your cash flow — whether you get paid in a week or in ninety days changes what you can do with that money in the meantime.
The most common format is a code like "Net 30" or "2/10 Net 30". The first number tells you how many days the customer has to pay. The second number (if there is one) tells you what discount they get if they pay early. Without clear terms on the invoice, the customer has no obligation to pay on any particular schedule, and you have no legal ground to charge late fees.
Key Takeaways
- Payment terms must be written on the invoice itself to be enforceable — a verbal agreement or an email does not count as a binding term.
- Net 30 means the customer has 30 days from the invoice date to pay; Net 60 means 60 days; COD means cash on delivery before they receive the goods.
- Early payment discounts like "2/10 Net 30" mean the customer saves 2 percent if they pay within 10 days, otherwise they pay the full amount by day 30.
- The terms you set affect how long you wait for money and whether you can charge interest or fees if payment is late.
The most common payment term codes and what they mean
Net 30 is the standard in most industries. The customer receives the invoice and has 30 days from that date to pay. If the invoice is dated January 1, payment is due by January 31. This gives the customer time to receive the goods, check them, and process the payment through their own accounting system.
Net 60 and Net 90 are longer terms, common when you are invoicing other businesses or government agencies. Net 60 means 60 days; Net 90 means 90 days. The longer the term, the longer you wait for your money, but longer terms can make you more competitive for large contracts.
COD (cash on delivery) or CIA (cash in advance) means payment happens before or at the moment of delivery. COD is common in retail and shipping; CIA is common when you do not know the customer or when the order is large. With these terms, you do not extend credit at all.
2/10 Net 30 means the customer gets a 2 percent discount if they pay within 10 days, otherwise they pay the full invoice amount by day 30. This incentivizes early payment and improves your cash flow. If the invoice is for $1,000, paying within 10 days costs $980; paying after day 10 costs the full $1,000.
Due on receipt means payment is due as soon as the customer receives the invoice, with no grace period. This is less common and usually reserved for situations where you have a strong relationship or the customer has a history of late payment.
How payment terms affect your cash flow and what you can charge if payment is late
The terms you set determine how long your money is tied up. If you invoice on the 1st with Net 30 terms, you do not see the payment until around the 31st. If you invoice with Net 90, you are waiting three months. During that time, you cannot use that money to pay your own suppliers or cover payroll, so longer terms mean you need more working capital on hand.
Once the due date passes, you can charge a late fee or interest, but only if the invoice states what that fee or rate is. A common late fee is 1.5 percent of the invoice amount per month, or a flat fee like $25. Some invoices state "1.5% monthly interest on overdue balances" or "Late payments subject to $25 fee". Without this language on the invoice, you cannot legally charge the fee, even if payment is weeks overdue.
The terms also affect your legal position if you need to pursue collection. If terms are clear and in writing on the invoice, you have documentation that the customer agreed to them. If terms are vague or missing, a court will assume a "reasonable" payment period, which varies by state and industry but is typically 30 days.
Where payment terms go on the invoice and what happens if you do not include them
Payment terms belong in a specific section of the invoice, usually labeled "Payment Terms" or "Terms of Payment", and they should appear near the due date. Some invoicing software puts them at the bottom; others put them in a box near the top. The location does not matter as long as they are visible and clearly stated.
If you do not include payment terms on the invoice, the customer is not legally bound to any important date. They can pay whenever they choose, and you cannot charge late fees or interest. In practice, most customers will pay within 30 to 60 days out of habit or because their own accounting system defaults to that, but you have no recourse if they do not.
If you state terms verbally or in an email but not on the invoice itself, those terms are not enforceable. The invoice is the contract, and anything not written on it does not count. This is why it matters to use invoicing software or a template that includes a terms field, or to manually add the line before you send it.
How to choose payment terms that work for your business
Start with what your industry standard is. If you are a freelancer or small service provider, Net 30 is the baseline. If you are invoicing other businesses, Net 30 to Net 60 is normal. If you are invoicing government agencies or large corporations, they may require Net 60 or Net 90, and you may have no choice.
Consider your cash flow needs. If you have to pay suppliers before you get paid by customers, shorter terms protect you. If you have cash reserves and want to be more competitive, longer terms may help you win contracts. Early payment discounts like 2/10 Net 30 are a middle ground — they encourage faster payment without forcing it.
Be consistent. Use the same terms for all customers unless you have a specific reason not to. Customers notice if you charge different terms to different people, and it can create friction. If you need to offer longer terms to a particular customer, document why and keep a record.
Payment terms versus payment methods
Payment terms and payment methods are different things. Terms are the important date and conditions (Net 30, COD, 2/10 Net 30). Methods are how the money actually moves — check, bank transfer, credit card, PayPal, or cash. An invoice can have Net 30 terms and accept payment by check or ACH transfer.
Some invoicing software lets you specify both on the same invoice. You might write "Net 30 — payment by bank transfer to [account details]" or "Net 30 — checks payable to [business name]". This removes confusion about both when and how to pay.
If you accept credit card payments, note that credit card processors may charge you a fee (typically 2 to 3 percent), so you may want to offer a discount for bank transfers or checks to offset that cost. This is separate from the payment terms themselves.
Frequently Asked Questions
What does Net 30 mean exactly?
Net 30 means the customer has 30 days from the invoice date to pay. If you invoice on January 1, payment is due by January 31. The word "net" means the full amount with no deductions (unless you have offered a discount for early payment).
Can I charge interest if the customer pays late?
Only if the invoice states the interest rate or late fee. A common statement is "1.5% monthly interest on overdue balances" or "Late payments subject to $25 fee". Without this language on the invoice, you cannot legally charge interest, even if payment is months overdue.
What if the customer wants different payment terms than I offer?
You can negotiate. If a large customer or government agency requires Net 60 or Net 90, you may decide it is worth the wait to keep the business. If a customer asks for terms you cannot afford, you can offer a compromise like 2/10 Net 45, or you can decline the work.
Do payment terms have to be in a specific format?
No. "Net 30", "Payment due within 30 days", and "Due by [specific date]" all work. What matters is that the terms are written on the invoice and clearly state when payment is due. Vague language like "payment expected soon" is not enforceable.
What if I forget to put terms on an invoice I already sent?
Send a corrected invoice with the terms included, or send a separate email stating the terms before the customer pays. Once they have paid, the terms no longer matter. If they have not paid and you want to enforce a important date, get the terms in writing as soon as possible.