The Revenue Act of 1978 contains several changes in the federal tax laws that affect the business aspects of dental practice as well as the dentist as a individual taxpayer. The dentist as a business person should be aware of the provisions affecting the investment credit, simplified pensions plans, the corporate tax rates, the jobs tax credit, and subchapter S corporations. The dentist as an individual taxpayer should be aware of the new individual tax rates, the general tax credit, changes in the itemized deductions, and the capital gains tax. In addition, all dentists must be aware of the changes in the social security laws. The provisions of the Revenue Act of 1978 presented do not represent every new provision, only those that most directly affect the dentist. Several other provisions of the act must not be overlooked in tax planning or tax preparation. With the changes in the tax laws in mind, the dentist, working with an attornye, accountant, or business advisor, could plan the advantageous ways to expand the practice, purchase new equipment, or shorten the time of tax return preparation.