Invoice terms generator
Choose when you want to be paid, and what happens if you are not. Get one line for the invoice and the full terms for your contract — with what a late fee or a discount really works out to.
No account, no email wall. It runs entirely in your browser — nothing you type leaves it.
Terms
Net 30
Due 31 October 2026.
Late fee as a yearly rate
18% a year
The monthly rate × 12 — the form most legal limits are written in.
One line for the invoice
Payment due within 30 days (by 31 October 2026). Late balances accrue 1.5% per month.
Full terms, for your quote or contract
- Payment is due within 30 days of the invoice date (Net 30).
- Payment can be made by bank transfer (ACH) or card.
- If anything on this invoice looks wrong, tell us within 7 days of receiving it so it can be corrected before the due date.
- Balances not paid by the due date accrue a late charge of 1.5% per month (18% per year), or the maximum permitted by law if lower.
- We may pause further work while an invoice is overdue.
Before you use these
- Late fees are enforceable only if the customer agreed to them before the work — put these terms in your quote or contract, not just on the invoice.
Not legal advice. Late-fee and interest rules differ by state and country.
Next steps
Terms only help if you hold to them. When an invoice does go past its due date, the late fee calculator works out the charge, and how to add a late fee to an invoice covers how to raise it without losing the client. For what Net 30 means in practice, see what does Net 30 mean.
Questions about payment terms
- What does Net 30 mean?
- Payment is due 30 calendar days after the invoice date. Net 15 is 15 days, Net 60 is 60, and "due on receipt" means as soon as the invoice arrives.
- What does 2/10 Net 30 mean?
- The customer may take 2% off if they pay within 10 days; otherwise the full amount is due in 30. It sounds small, but it is 2% for getting paid 20 days sooner — about 37% a year as an interest rate.
- How is the discount's yearly cost worked out?
- Discount ÷ (1 − discount) × 365 ÷ (payment days − discount days). For 2/10 Net 30 that is 0.02 ÷ 0.98 × 365 ÷ 20 = 37.24%. It is the standard way to compare an early-payment discount with other ways of borrowing.
- How much can I charge as a late fee?
- It depends on where you and your customer are. Many US states cap late charges or interest, often around 1.5% a month (18% a year) or lower, and a fee is easier to enforce when the customer agreed to it before the work started. Check your own state's rules; this tool is not legal advice.
- Should the terms go on the invoice or in the contract?
- Both. The full terms belong in your quote or contract, agreed before any work. The invoice repeats the short version — the due date and any late fee — so nobody is surprised.
Collectly does this across every invoice, on its own
You just wrote your payment terms. Collectly does the same thing continuously for every unpaid invoice you have — reads the replies, works out why each one is unpaid, estimates when it will land, and drafts the follow-up for you to approve.
With 15 rules it cannot talk its way around
- A paid or written-off invoice is never chased again. Follow-ups are switched off permanently, not deferred.
- A disputed invoice stops automated chasing entirely and goes to a person to resolve.
- A promise to pay on a date pauses reminders until that date has passed. Collectly checks back the day after, not on the day.
- At least three days between reminders on the same invoice, so re-running the analysis cannot turn into nagging. A resent or corrected invoice the customer has just asked for is not a reminder, and still waits for your approval.
Want help when an invoice runs late anyway?
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