Expenditures represent decreases in economic benefits recorded during the management period in the form of outflows or reductions in the value of assets or increases in debts that contribute to decreases in equity, other than those resulting from its distribution to owners. During the course of the separate economic activity, there is a difference between the approach of accounting and fiscal expenses. This research focuses on the study of expenditure from an accounting and fiscal point of view, by studying the national regulatory framework for expenditure accounting. Deductible or non-deductible expenses? This is a question that taxpayers ask themselves when it comes time to complete their annual income tax return. It is known that the understanding of the deductibility of expenses by taxpayers and tax authorities may differ, although, in most cases, both parties refer to one and the same rule of the Fiscal Code (art. 24(1)): "It is allowed to deduct ordinary and necessary expenses, paid or borne by the taxpayer during the fiscal period, exclusively within the entrepreneurial activity.". This provision contains a whole philosophy on understanding the deductibility of expenses for tax purposes. The divergences that appear in this context are generated by the fact that the agreement of the two parties regarding the “accounting character” and the “fiscal character” of some expenses for the entrepreneurial activity is different.