A retainer can be agreed for ongoing regular work.
Clients will be invoiced at the end of each month.
Testimonial
I met Lindsay through her advert in my local magazine. Lindsay took over the invoicing and posting out of the advertiser copies of the magazines, a process that deprives me of 2 days time every month. Since Lindsay started doing this work for me, I have been able to concentrate on more profitable projects for the magazines, and the other plus is that the invoicing now gets completed in a timely fashion!