When invoicing the client as a consultant it is necessary to charge VAT on your day rate and your expenses incurred (with the VAT deducted if it has already been added) conducting the work. I looked for a template to do this automatically in LaTeX. The Invoice Package was a bit too complicated for what I wanted.
I found an invoicing template that didn’t quite do what I needed, so I made some modifications.
This takes your day rate, multiplies it by the number of days worked to get billed activities. Then you can add on expenses (less VAT) in any number of categories you like. This is totalled, then VAT calculated on the whole lot.
I hope someone else can use this.