Simple Invoices

    Due Date

    The due date is calculated automatically from the invoice date and the selected payment term. The calculation occurs client-side whenever the invoice date or payment term changes.

    How the Due Date Is Calculated

    Payment Term KindCalculation RuleExample (Invoice: March 5)
    NET_DAYSInvoice date + parameter daysParameter=30 → April 4
    EOMLast calendar day of the invoice monthMarch 31
    EOM_PLUS_DAYSLast day of invoice month + parameter daysParameter=15 → April 15
    MFI_DAYParameter-th day of the following monthParameter=15 → April 15

    MFI_DAY Clamping

    If the parameter exceeds the number of days in the target month, the day is clamped to 28.

    Example: Parameter=31 on an invoice dated January 15 → February has 28 days → due February 28.

    Display Rules

    ScenarioDue Date Display
    Payment term selectedCalculated due date (e.g., "2025-04-04")
    No payment term selected"-"

    Where the Due Date Appears

    • Invoice form (read-only calculated field)
    • Invoice list view
    • Invoice detail view
    • Invoice PDF
    • Customer portal

    Notes

    • The due date field on the invoice form is read-only: it is always calculated, never manually entered
    • To change a due date, change either the invoice date or the payment term
    • Payment terms are configured under Settings → Payment Terms