[richardknop]

In my current contract I'm invoicing weekly. First invoice is paid 5 weeks after I submit it and from there on I get paid every every week.

So when I started the contract there was 1 month period before my invoice from first week got paid. After contract ends client will continue paying me for 4 more weeks to pay all my invoices.

This is usually also same with monthly invoicing. Invoice for my first month would get paid one month later after I submit it. So first invoice is paid 2 months after I started working for the client and from there on I'm paid every month. When the contract ends I'll get paid for one additional month as all invoices were shifted by a month.