Net 45 Calculator
Enter your invoice date and get the Net 45 due date plus a full reminder schedule for follow-up emails. Everything runs in your browser — no data is stored or sent to any server.
How It Works
The Net 45 Calculator takes your invoice date and instantly computes the payment due date 45 calendar days later. It also generates a complete follow-up reminder schedule including a 14-day reminder, 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 45 is a payment term that gives the buyer 45 calendar days from the invoice date to pay the full amount. This term applies to calendar days, not business days, so weekends and holidays are included. Net 45 is commonly used in mid-market B2B transactions, manufacturing, wholesale, and professional services where the buyer needs more time to process payments through internal approval workflows.
Formula
Due Date = Invoice Date + 45 calendar days
14-Day Reminder = Invoice Date + 31 days
7-Day Reminder = Invoice Date + 38 days
3-Day Reminder = Invoice Date + 42 days
Due Date Reminder = Invoice Date + 45 days
Overdue Follow-Up = Invoice Date + 52 days
When to Use Net 45 Payment Terms
Net 45 strikes a balance between the seller's need for timely payment and the buyer's need for adequate processing time. It is particularly common in industries where purchase orders go through multiple levels of approval before payment is authorized. Manufacturing companies, wholesale distributors, and large service providers frequently use Net 45 as their standard payment term.
For freelancers and small businesses, Net 45 may be too long for comfort. If you offer Net 45 terms, ensure your cash reserves can sustain operations during the waiting period. Consider whether your client relationship and contract size justify the extended payment window.
Managing Cash Flow with Net 45
- Invoice immediately. Do not delay sending invoices. Every day you wait extends the effective payment window beyond 45 days.
- Forecast cash flow carefully. With 45-day terms, you need to plan your expenses around a longer receivables cycle.
- Use multiple reminder touchpoints. The longer the payment term, the more important it is to send structured reminders at regular intervals.
- Consider early payment discounts. Offering 2/10 Net 45 (a 2% discount for payment within 10 days) can incentivize faster payment.
- Track your DSO metric. Days Sales Outstanding should be monitored closely when using longer payment terms to ensure clients are paying within the agreed timeframe.
Examples
Example 1: Invoice dated January 1
If you issue an invoice on January 1 with Net 45 terms, the due date is February 15. Your 14-day reminder should go out on February 1, the 7-day reminder on February 8, the 3-day reminder on February 12, and the overdue follow-up on February 22 if payment has not been received.
Example 2: Invoice dated June 10
An invoice dated June 10 is due on July 25. Send the first reminder on July 11 (14 days before), the second on July 18 (7 days before), the third on July 22 (3 days before), and an overdue follow-up on August 1 if needed.
Example 3: Invoice dated September 15
An invoice issued on September 15 has a Net 45 due date of October 30. The 14-day reminder falls on October 16, the 7-day reminder on October 23, the 3-day reminder on October 27, and the overdue notice would go out on November 6.