Deferrals are the consequence of the revenue recognition principle which dictates that revenues be recognized in the period in which they occur, and the matching principle which dictates expenses to be recognized in the period in which they are incurred. Deferrals are the result of cash flows occurring before they are allowed to be recognized under accrual accounting. As a result, adjusting entries are required to reconcile a flow of cash (or rarely other non-cash items) with events that have not occurred yet as either liabilities or assets. Because of the similarity between deferrals and their corresponding accruals, they are commonly conflated.