Invoice terms are the rules of when and how payment is expected. Net 30 is the most common term in the US — but understanding it fully means knowing both what it says and what it implies for your cash flow.
Invoice terms and what they cover
Payment terms on an invoice communicate three things: when payment is due, what the consequences of late payment are, and what payment methods are accepted. Net 30 addresses the first — it tells the client they have 30 days.
The consequences of late payment (late fees, interest) are separate and need to appear either in the contract or in the invoice’s terms section. Net 30 alone only states the deadline.
Accepted payment methods should also be listed, since “net 30” says nothing about whether the client should mail a check or click a payment link.
When net 30 is the right term
Net 30 makes sense when:
- The client has a formal AP process that runs on monthly cycles. Corporate clients often cannot pay faster regardless of terms.
- The project amount is large and the 30-day delay is manageable given the payment’s size.
- There is a long-term retainer relationship where cash flow is predictable and the client has a reliable payment history.
When to use shorter terms
Net 15 or due-on-receipt makes more sense when:
- The project is small and the 30-day delay represents weeks of waiting for a modest amount.
- You are working with a new client whose payment habits are unknown.
- You are dealing with a client who has a history of paying late — shorter terms give you more room to follow up before the invoice becomes seriously overdue.
Switching from net 30 to net 15 costs nothing if the client was going to pay on time anyway. And it cuts your average collection time in half.
How to change your terms on existing client invoices
If you want to switch a long-standing client from net 30 to net 15, raise it before the next project starts — not mid-project. Frame it simply: “For upcoming work, I’m moving to net 15 terms. Happy to answer any questions.” Most clients accept this with no friction.
If the client pushes back and insists on net 30, you can negotiate: keep net 30 but require a 30-50% deposit before work begins. The deposit reduces your exposure and makes the final invoice payment less financially critical.
Using Waco to manage net 30 invoices
Waco lets you set your default payment terms and automatically calculates the due date when you create each invoice. You can set reminder alerts for day 25 and day 30 so neither you nor the client is caught off-guard. If the due date passes without payment, the invoice surfaces in your overdue view automatically — no spreadsheet tracking required.
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