1. to deduct or subtract in advance, before a final calculation or payment
Usage: transitive verb; chiefly used in financial or accounting contexts

Examples

• The employer will prededuct taxes from your paycheck.
• Insurance companies prededuct the deductible before processing claims.
• The bank prededucts fees from the account balance.
• They prededucted the deposit from the final invoice total.
• The system automatically prededucts applicable discounts at checkout.