Deduction Codes are like shorthand labels businesses use to track why money gets taken out of your paycheck or a payment—think stuff like taxes, health insurance, retirement savings, union dues, or even that parking ticket you forgot about. Each code is a quick way to log and organize where your cash is going, so payroll teams (or you) can glance at a pays tub and go, “Ah, that’s why my check shrunk this month!” It keeps everyone honest, compliant, and avoids messy “Wait, what’s this charge?” confusion.