Non-deductible expenses are costs that cannot be written off. These often include personal expenses, entertainment costs, and certain fines or penalties. The IRS typically divides expenses into these two categories, making it essential for owners to know which is which to stay compliant and maximize savings. Recognizing what qualifies as a legitimate business expense forms the foundation for effective tax planning and bookkeeping for any LLC owner.Not all expenses receive equal treatment under tax law. Dedu ...