Investing term
What is Operating income?
Gross profit minus operating expenses — profit from the core business, before interest and taxes.
Operating income is the profit from a company's core business — gross profit minus operating expenses — before interest and taxes are subtracted. It isolates how well the actual business performs, stripping out financing choices and tax quirks that vary from company to company.
Because it sits above interest and tax, operating income is often a cleaner read on operational health than the bottom line: two companies with identical core businesses can report very different net incomes purely because one carries more debt (and so more interest) or faces a different tax rate. Operating income (also called operating profit or EBIT) removes those differences, letting you compare how well each company actually runs its operations. It's the foundation for operating margin and a key input to many valuation measures.
Operating income is gross profit minus operating expenses, before interest and tax. It isolates how well the actual business runs, stripping out financing and tax so companies compare fairly.
For example
Gross profit of $40M minus $22M of operating expenses gives $18M of operating income — the profit from the core business, before interest and tax.
Learn it by doing
That's Operating income in theory — it clicks when you use it. Practise it hands-on in a free, interactive lesson (Stage 14, Reading Financial Statements).
Try the free lesson →Why it matters to you
Operating income matters because it measures the profitability of the business itself, uncontaminated by how it's financed or taxed. That makes it the fairest basis for comparing the operational performance of different companies and for tracking whether a company's core business is improving. Since financing and tax can be changed or vary widely, operating income gets closer to the durable question that matters: is the underlying business a good one?
⚠ Overlooking interest on a heavily indebted company
Operating income deliberately excludes interest, which is useful for comparing operations — but a company with strong operating income can still deliver poor net income and be risky if it carries heavy debt with large interest payments. Judging an indebted company by operating income alone, without accounting for the interest it must pay, can overstate its real profitability and understate its risk.