Wherever possible use descriptive billing rather than the traditional and terse For Professional Services. I know there are cases, particularly with large corporations or those with in - house counsel, where detailed and itemized statements are required. But don t use this type of bill when the client does not require it. It can become tedious as well as expensive to prepare. It can also be a marketing mistake.
Detailed billing can lead to questions over rates, time spent, etc.
A descriptive bill provides adequate explanation. If the bill is higher than you projected or the client expects, call the client to discuss it first. Discuss and explain the situation with the client before you do the work. There Is , when you send the final bill. In your cover letter, let the client know that it is the final bill.