How big is your client? I think, in general, the larger the client, the more time they take in paying up. If your client is large (hint: any contact you have in

How big is your client? I think, in general, the larger the client, the more time they take in paying up. If your client is large (hint: any contact you have in their finance department is at least two levels removed from CFO) you should probably have to wait for more time before worrying (and also, in the future, raise your prices to factor this in).