When discussing business expenses I often get asked "Do I have to keep my receipts or can I just use my credit card bill?" IRS Publication 463 addresses the substantiation and record keeping requirements for business expenses. IRS says you must have documentary evidence to prove a business expense. However there are some exceptions to the documentary evidence requirement.
The following is from Pub 463.
Documentary evidence. You generally must have documentary evidence, such as receipts,
canceled checks, or bills, to support your expenses.
For most people the $75 rule is really useful. However, even if you are not required to provide documentary evidence you still have to prove the expense by providing information about the amount, time, place and business purpose of the expense. IRS provides a table available here that to be honest is more confusing than helpful.
For expenses under $75 a businesses general ledger or an individual's financial records (Quicken, MS Money, or paper ledgers) will generally suffice as long as they provide amount, time, place and purpose descriptions. If the expense is over $75 you need documentation. IRS also has something to say about what constitutes adequate documentation. For example a charge card receipt is not adequate for a restaurant bill because it does not show the number of people served. You can read some other examples contained in the publication.
The best solution is to setup a record keeping system that automatically tracks everything IRS needs. Here's the suggestion we give to clients.
Axiom Professional Group is a public accounting and consulting firm started by Joey Brannon, CPA. For more information you can view the Axiom Professional Group, P.A. home page or visit the Axiom web site articles page (both links will exit the blog site).