One of the most successful ways to get accounts paid on time is to chase for payment before the due date! Perhaps “chase” is the wrong word; “advise” your client of the amount due and the due date before that date may be a better way of putting it. Easiest way to do this? A simple email merge. Queries can be addressed, invoice copies sent out, amount/s charged / queried before the account even has a chance to become late. Brilliant!! I’ve applied this many, many times over the years with great success but only when it’s been properly and carefully introduced to the client base.