Invoice Due Date Calculator
Calculate invoice due dates with custom payment terms.
Due Date
November 18, 2026
Wednesday
Days Until Due
29
What This Calculator Does
The Invoice Due Date Calculator computes the payment due date for any invoice based on a custom number of days. Unlike the dedicated Net 30, 60, and 90 calculators, this tool supports any payment term — Net 15, Net 45, Net 120, or any custom value.
How the Calculation Works
Enter the invoice date and the number of days until payment is due (the net terms). The calculator adds that many calendar days to the invoice date to produce the due date, then shows how many days remain until the due date or whether the payment is already overdue.
Example Scenario
A consultant agrees to Net 45 terms with a client. The invoice is dated June 10, 2026. Entering June 10 and 45 days produces a due date of July 25, 2026, with the tool showing the remaining days until payment is due.
Common Use Cases
- ✓ Calculating due dates for non-standard payment terms (Net 15, 45, 120)
- ✓ Managing a portfolio of invoices with different terms
- ✓ Tracking overdue status across multiple clients
- ✓ Verifying due dates on received invoices
How to Use
1.Enter the invoice date.
2.Enter custom payment terms in days.
3.See the due date and days remaining.
Benefits
- ✓ Supports any custom payment term
- ✓ Works for Net 30, 60, 90, and beyond
- ✓ Shows overdue status
Frequently Asked Questions
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Category
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Related Glossary Terms
Due Date
The date by which a payment, delivery, or task must be completed. Due dates are commonly used in invoicing (e.g., Net 30), project management, and pregnancy (estimated delivery date).
Invoice Date
The date on which an invoice is issued. The invoice date is the starting point for calculating payment due dates based on the agreed payment terms (e.g., Net 30 from invoice date).
Net 30
A payment term indicating that the full amount of an invoice is due within 30 days of the invoice date. Net 30 is one of the most common B2B payment terms.
Net 60
A payment term requiring full payment within 60 days of the invoice date. Net 60 terms provide more time for the buyer to make payment compared to Net 30.
Net 90
A payment term requiring full payment within 90 days of the invoice date. Net 90 is typically offered for large orders or to established business relationships.