Commuter Taxpayer Assistance Act of 1980

Commuter Taxpayer Assistance Act of 1980 - Amends the Internal Revenue Code to exclude from an employee's gross income the value of a public transit pass distributed, under a written plan of the employer which does not discriminate in favor of employees who are officers, shareholders, or highly compensated employees, by such employer to such employee and used by such employee for commuting between his residence and place of employment. Requires the taxpayer to demonstrate that at least 80 percent of his commutes are with use of such passes provided by his employer. Declares such passes to be nontransferable.

Allows a credit against the income tax of an employer of an amount equal to five percent of the cost of such passes. Requires substantiation of such costs with a receipt from the local transit authority. Requires the pass plan to be nondiscriminatory and in writing.