My first estimate for a memory wall of corian bricks was seriously underpriced and I chalked it up to learning expense. I asked my accountant if I could write it off the engraving as a donation and was told that I could not, unless I paid someone else to do it. Since I don't pay myself a salary it is not considered a true cost.

However, because of other factors I recently reworked the current invoice to show the difference between what I should have charged and what I am charging as a discount. The bottom line is the same, but it shows the customer why I am not giving a lower charge on the non-engraved blanks that they need for fill.

I think by listing it this way I can write it off as a discount expense. Still have to check on that with my accountant.