Staying current in your field often means buying books, journals, and publications, and for self-employed workers these costs are generally deductible. If you are self-employed or run a business, books and subscriptions that are directly related to your work qualify as an ordinary and necessary business expense. A tax attorney deducting tax law journals or a marketing consultant buying books on digital advertising are clear examples of qualifying purchases. Employees who buy professional reading materials out of pocket generally cannot deduct those costs under current federal law. If you use a publication for both personal and professional reasons, only the business-use portion is deductible.