
How Merchant Category Codes Control Your Business Credit Card Rewards — and Your 1099-K
A Merchant Category Code (MCC) is a four-digit classification assigned to merchants by payment processors. It decides whether a business credit card's bonus categories trigger, shapes a merchant's interchange fees, and appears in Box 2 of IRS Form 1099-K — which returns to a $20,000 and 200-transaction threshold for tax years 2025 and beyond.










