Net 30 Calculator
Enter your invoice date and get the Net 30 due date plus a full reminder schedule for follow-up emails.
How It Works
The Net 30 Calculator is a focused tool that takes your invoice date and instantly computes the payment due date 30 calendar days later. But it goes beyond a simple date calculation. It generates a complete follow-up reminder schedule to help you get paid on time. The schedule includes a 7-day reminder, a 3-day reminder, a due-date reminder, and an overdue follow-up date for invoices that go past due.
Net 30 is the most widely adopted payment term in business. It means the buyer has 30 calendar days from the invoice date to pay the full amount owed. This term applies to calendar days, not business days, so weekends and holidays are included in the count. The simplicity and universality of Net 30 make it the default choice for most B2B transactions worldwide.
Formula
Due Date = Invoice Date + 30 calendar days
7-Day Reminder = Invoice Date + 23 days
3-Day Reminder = Invoice Date + 27 days
Due Date Reminder = Invoice Date + 30 days
Overdue Follow-Up = Invoice Date + 37 days
Why Reminder Schedules Help You Get Paid on Time
Research shows that businesses that send payment reminders before the due date get paid significantly faster than those that wait until an invoice is overdue. A structured follow-up schedule removes the guesswork and ensures that payment stays top of mind for your clients. The reminder schedule generated by this calculator is based on best practices used by accounts receivable professionals across industries.
The 7-day reminder serves as an initial heads-up. It is a friendly, professional nudge that lets the client know the payment date is approaching. Many businesses automate this email as part of their invoicing workflow. The 3-day reminder is a more urgent follow-up, giving the client a final window to process the payment before it becomes due. The due-date reminder is sent on the day the invoice is due, confirming the expectation. Finally, the overdue follow-up at 7 days past due initiates the collections process with a firmer tone.
Best Practices for Invoice Follow-Up
- Be polite and professional. Most late payments are not intentional. A friendly tone preserves the business relationship and encourages prompt payment.
- Include invoice details in every reminder. Always reference the invoice number, amount, and due date so the client can locate the invoice quickly.
- Use multiple communication channels. If email reminders are not getting a response, follow up with a phone call or a message through your project management platform.
- Document everything. Keep records of all communications related to payment. This is important if the situation escalates to a formal dispute or collections process.
- Set clear terms upfront. The best way to avoid late payments is to establish clear payment terms in your contract before work begins. Include details about late fees, grace periods, and the consequences of non-payment.
Examples
Example 1: Invoice dated January 1
If you issue an invoice on January 1 with Net 30 terms, the due date is January 31. Your 7-day reminder should go out on January 24, the 3-day reminder on January 28, and the overdue follow-up on February 7 if payment has not been received.
Example 2: Invoice dated March 15
An invoice dated March 15 is due on April 14. Send the first reminder on April 7 (7 days before), the second on April 11 (3 days before), and an overdue follow-up on April 21 if needed.
Example 3: Invoice dated October 20
An invoice issued on October 20 has a Net 30 due date of November 19. The 7-day reminder falls on November 12, the 3-day reminder on November 16, and the overdue notice would go out on November 26.