nondeductible

/ˌnɑndɪˈdʌktəbəl/
adjective
  1. Not allowed to be subtracted from taxable income when calculating taxes.
    • Personal entertainment expenses are usually nondeductible for tax purposes.
    • The accountant explained which costs are deductible and which are nondeductible.
    • She learned that the fine was a nondeductible expense on her tax return.
Antonyms