You can deduct employee expenses as well (as long as your employer didn't reimburse you for them), the cost of insurance to your business, and health insurance premiums if you are self-employed. The cost of personal liability insurance, in most cases, is not deductible. Liability insurance protects you from claims for accidents on your property or injuries caused by you or a member of your family (or your pet). It may also cover damages caused by your negligence in operating a vehicle. Most people don't carry personal liability coverage with a separate policy.