No, I am not talking about taking them to the movies and buying them a tub of popcorn, I am talking about the date you put on your invoice. Here is a little un-known trick that won’t work for every client but it will work in some instances for you.
If it is April 3rd and you are doing your invoicing for work you completed in March date the invoices March 31st rather than April 3rd.
But why? Because then for the person receiving the invoice they will read it as a March Bill and most companies will pay their March billings in April., but if it is dated April, even early April, it becomes a May payable. So instead of receiving your money in April you do not get paid until May.
So you may be able to accelerate the payment by a month simply by dating it the last day of the prior month rather then the first few days of the current month. This is probably going to happen more when you are billing larger organizations or agencies because they have accounting departments who often function on the monthly cycle. If you are billing a small company or a homeowner this probably will not have the same affect, but it never hurts to try.
So if you are issuing invoices for your engineering or architectural service within the first couple days of the month try dating the last day of the prior month.