yes it in the client settings you can turn on or off the interest.  With Sage if someone pays a previous invoice the statements drop the accrued interest unless you do an actual interest invoice. 

Dewdl

Can you upload the screenshot of that settings screen?

when this box is filled in with net days the interest self calculates BUT will not produce invoice automatically.  You need to watch your client statements and effectively produce your own.

when this box is filled in with net days the interest self calculates BUT will not produce invoice automatically.  You need to watch your client statements and effectively produce your own.

Sorry Dewdl,

The box you indicates is under the Payment terms and has nothing to do with calculating interest.  It is designed to tell the customer how long they have to pay the invoice.

If someone uses the % Discount and Days boxes, then they can indicate something like 2%10, Net 30, meaning the customer has to pay the invoice in 30 days but if they pay early, they can take a 2% discount off the subtotal of the invoice.  This does not add on interest charges for late payments.

if this box s clicked and you have ABC Plumbing with statement that is showing an outstanding invoice, from the statement you will see the calculated interest.  Which then you have to produce and invoice for the interest it will not self generate from system.