[superhans2]

Depends on the client. Some clients pay within 3 days and some delay the payment for weeks. Some companies even have policies to pay invoices only after the second reminder (for cash flow reasons...). For me, early payments are sign of reliability and trustworthiness. I get a bit nervous and stressed if I have to remind clients to pay my invoices. Clients who repeatedly forget or delay payments go way down my "want to work with again"-list and get sorted out this way sooner or later.