Free Invoice Due Date Calculator
Use this tool to work out exactly when an invoice should be due based on the invoice date, payment terms, and whether weekend due dates should move to Friday or Monday.
What you can do here
Calculate invoice due dates from an invoice date and payment terms, with optional weekend handling.
Built for real invoice workflows
If you also want the invoice itself to send automatically on time, try InvoiceAgent.
Preparing your calculator with today’s date…
How to use it
Choose the invoice date.
Enter your payment terms in days, such as 7, 14, or 30.
Pick how weekend due dates should be handled.
Why it helps
Avoid manually counting terms on the calendar.
Make client payment expectations clearer.
Match due date planning to the same weekend logic used in recurring invoice workflows.
From free tool to live invoice workflow.
Use the result when creating your invoice in InvoiceAgent. Planner setup links carry the settings they describe into a draft. Review your dates, amounts, PDF, and reminder settings before scheduling.
Move from the quick answer into the rest of the invoice system.
Invoice due date calculator guide
Invoice due date calculator guide
Use the full SEO calculator page for due-date guidance, reminder context, and workflow next steps.
Payment reminders
Payment reminders
Turn a clean due date into reminder timing that is easier to trust and repeat.
Invoice templates
Invoice templates
Use the result inside invoice formats that are ready for clients and easier to automate.
Knowledge base
Knowledge base
Review the billing concepts behind the numbers before they go onto a live invoice.
Profession pages
Profession pages
See how freelancers, consultants, and agencies apply the same calculator output in different workflows.