How due dates work by default
By default, Datamolino reads the due date printed on the invoice. You only need a due date rule when you want to ignore what is on the invoice and calculate the date yourself - for example when your supplier never prints a due date, or when your internal payment terms differ from theirs.
👉 What if the invoice has no due date?
If the invoice has no due date and no rule is set, Datamolino falls back to the issue date. If there is no issue date either, it uses the import date.
👉 What does "read from invoice" mean?
It is the default setting. Datamolino keeps the due date that was captured from the invoice and does not calculate anything. Pick this when the printed due date is correct and you do not want any automation to override it.
Where to set a due date rule
👉 Set Due Date rules for an individual supplier / customer contact
You can set up due date rules for individual supplier in supplier automation inside the document detail. When you save, you can also choose to apply the new setting to existing documents that are still in the Ready state.
👉 Set due date rules for all existing contacts at once
Go to Folder Menu → Accounting & Automation
Select Automation Contacts
Stay in Supplier Automation or switch to Customer Automation
Click Mass Edit Supplier Settings (or Customer Settings)
Find the Due Date field, update it, and click Save
👉 Set a due date rule for all future contacts
Go to Folder Menu → Accounting & Automation
Select Integration
Stay in Supplier Automation or switch to Customer Automation
Find the Due Date field, update it, and click Save
The due date rule options
The Due date dropdown offers a fixed set of rule types. Each one calculates the due date in a different way.
👉 How does Datamolino calculate the dates?
... of current month ... of following month | From the import date (not invoice issue date) |
... day(s) after the bill date ... day(s) after the end of the bill month | From the issue date captured on the invoice |
👉 What if the day I pick does not exist in a given month?
The due date moves to the last day of that month. For example, "31 of current month" on a February document becomes 28 or 29 February.
👉 What if the document has no issue date?
Some due date rules are calculated from the issue date - if it's missing, the rule can't run. Instead, Datamolino falls back in this order:
The due date already captured on the document
Import date
The document will still get a due date - just not the one the rule would have calculated.
Folder defaults and supplier rules together
A folder can have a default due date rule that applies to every new supplier created in that folder. A supplier can also have its own rule. When both exist, the supplier rule wins.
This means you can set a sensible folder-wide starting point - for example, "30 days after the bill date" - and then override it on the suppliers that need different terms.
Learn more about supplier defaults and how Datamolino remembers coding per supplier, or read the automation overview for the bigger picture of how rules, defaults, and learned coding fit together.




