Invoice Due Date Calculator
Enter the invoice date and payment terms. Get the exact calendar due date for Net 15, Net 30, Net 45, Net 60, or due on receipt. Free, instant, no account.
Calculate your due date
The due date is counted in calendar days from the invoice date.
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Make This Invoice FreeHow it works
Three quick steps to find any invoice due date.
Enter the invoice date
Start with the date on the invoice, which is usually the day you sent it to your client.
Pick your payment terms
Choose the term you agreed on, such as Net 30 or due on receipt. The tool adds that many calendar days.
Get the due date
See the exact payment due date and the total number of days until payment is expected.
Net 45 calculator: due date from any invoice date
Net 45 means the client has 45 calendar days from the invoice date to pay. Pick Net 45 above, set the invoice date, and the payment due date updates instantly.
- Invoice date 1 March gives a Net 45 due date of 15 April.
- Invoice date 15 September gives a Net 45 due date of 30 October.
Same idea for Net 15, Net 30 and Net 60. The clock starts on the invoice date unless your contract says otherwise, for example end-of-month terms.
Invoice calculator: due date or invoice amount
People search for an invoice calculator with two different jobs in mind.
- Due date
- When is this invoice payable under Net 15, Net 30 or Net 45? That is this page. Enter the invoice date and terms above.
- Amount
- What is the total after line items, tax or a discount? That is a different tool.
For amounts: free invoice generator, sales tax calculator, discount calculator
This page stays focused on the payment due date so the answer stays fast and accurate.
Free field guide
The Cash Flow Playbook for Trade Contractors
Terms that actually get paid, a reminder schedule you can copy, and the four numbers to check every Monday. Five pages, no fluff.
- Deposit and due-date defaults by job type
- A copy-paste terms paragraph
- The day 3 / 7 / 14 / 21 chase sequence
Frequently Asked Questions
Common questions about invoice due dates and payment terms.
Net 30 means the full invoice balance is due 30 calendar days after the invoice date. Net 15 and Net 60 work the same way with 15 or 60 days. The word net refers to the total amount owed, with no early payment discount applied.
It means payment is due 15 calendar days from today's date. Set the invoice date to today and pick Net 15 and the calculator gives you the exact day. The same works for Net 30, Net 45 and Net 60 from today, which is the quickest way to check a due date before you send an invoice.
Take the invoice date and add the number of days in your payment terms, counting calendar days rather than business days. A February 10 invoice on Net 30 is due March 12. Rather than counting by hand across month ends, enter the two values above and read the date off the result.
Net 45 gives the client 45 calendar days from the invoice date to pay. It is common with larger companies whose accounts payable runs on a set cycle, and with public sector buyers. Agree it in the contract rather than on the invoice, because a term the client has not accepted tends to be ignored.
Yes. Choose Net 45, enter any invoice date, and the payment due date appears immediately. The same tool handles Net 15, Net 30, Net 60 and due on receipt.
It is a free tool that turns an invoice date plus payment terms into the exact calendar day payment is due, so you do not count days by hand.
It is the due-date kind of invoice calculator: invoice date plus terms gives the payment due date. For totals, tax and PDF line items, use the free invoice generator on this site.
In most cases the clock starts on the invoice date, not the day the client receives or opens the invoice. To avoid confusion, send invoices promptly and state the due date clearly on the document.
The invoice date is when you issued the bill, and it starts the clock. The due date is when the money is expected, and it is the invoice date plus your terms. Both belong on the document: showing only one of them is the most common reason a client mis-schedules payment.
The calculated date is the contractual due date. Many businesses treat payment as on time if it arrives the next business day, but that is a courtesy rather than a rule. If it matters to your cash flow, write into your terms that payment falls due on the next business day.
Shorter terms like Net 7 or due on receipt improve your cash flow but can feel aggressive to some clients. Net 30 is a common standard for many industries. Match your terms to your cash needs and to what is normal in your field.
Once the due date passes, the invoice is overdue and you can send a polite reminder. Many businesses charge a late fee on overdue balances. Setting clear terms up front makes it easier to follow up.
Stop counting days by hand
Invoice My Clients sets due dates automatically and reminds clients before payment is late, so you get paid on time.
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A professional PDF in about a minute. No account, no invoice limit.