Invoice tool
Invoice Due Date Calculator
Calculate invoice due dates using calendar day or business day payment terms.
Invoice due date calculator
Use this invoice due date calculator to turn an invoice date and payment terms into a clear due date. It supports common calendar-day terms and optional business-day counting for contracts that exclude weekends or bank holidays.
When to use it
Use this for quick payment planning and invoice admin. Contract wording can vary, so check whether your terms mean calendar days, working days, end of month, or another rule.
FAQs
Does net 30 mean 30 calendar days?
Usually yes, but some contracts use business days or specific month-end terms. Check the agreed payment wording.
Can I use business days?
Yes, choose business days to exclude weekends and listed UK bank holidays.