OIBDA. A financial measure similar to EBITDA, except that it uses Net Operating Income as opposed to net income. It is calculated by adding interest, taxes, depreciation and amortization (also known as ITDA) to the company's operating income. OIBDA is used by companies more frequently, although it is still a non-GAAP measure. Some companies prefer to use OIBDA because it doesn't consider non-operating income, and therefore tends to give a better indication of income from regular operations.