Latvian legislation states that if you spend less than your assigned per diem - difference needs to be returned to the employee bank account. Concur does not support this calculation logic. Does anyone have experience in optimal Per Diem Set Up in Latvia?
Warm welcome from Lithuanian
Not sure I correctly understand your question. Do you want to find the difference between what was actually spend vs. per-diems?
What's the point of that?
In any case the idea of per-diems is to replace handling of receipts by giving a lump-sum for an employee, which means you should not care about how much he actually spend as long as employee is claiming that fixed per-diems amount.
Reimbursement of outstanding payables can happen via ERP system or via Concur (depends on your setup), so it's difficult to answer without knowing what you have configured.