Defined in section 238 of the Finance Act 2004, a pension input period (PIP) is the period over which an individual's pension input amount (www.practicallaw.com/4-504-0739) in relation to an arrangement under a registered pension scheme (www.practicallaw.com/5-201-6474) is measured for the purposes of testing the total pension input amount against the annual allowance (www.practicallaw.com/6-201-6478). How a PIP is set varies according to whether an arrangement is defined benefit (www.practicallaw.com/0-107-7545) or defined contribution (www.practicallaw.com/6-107-6072). An individual may have more than one PIP if he belongs to more than one scheme or arrangement.