Net Income
Net income is the true bottom line — what's left of revenue after every single expense, including interest and taxes. It's the number EPS is based on, and it's where both the cash flow statement and retained earnings begin.
Definition
Net Income (also called the bottom line, net profit, or net earnings) is the profit a company has left after subtracting ALL expenses — COGS, operating expenses, interest, and taxes — from revenue. It is the final line of the income statement, the numerator in earnings per share, and the starting point of both the cash flow statement and the retained earnings roll-forward.
Formula
Net Income = Revenue - COGS - Operating Expenses - Interest - Taxes OR Net Income = Pre-Tax Income x (1 - Tax Rate)
Revenue
Total sales for the period (the top line)
COGS
Direct cost of producing what was sold
Operating Expenses
SG&A, R&D, marketing and other operating costs
Interest
Net cost of debt financing
Taxes
Income taxes owed on pre-tax profit
How Net Income Is Calculated
Net income is the end of the income statement waterfall. Start with revenue, subtract COGS to get gross profit, subtract operating expenses to get operating income (EBIT), subtract net interest to get pre-tax income (EBT), then subtract income taxes to arrive at net income. A shortcut bankers use: Net Income = Pre-Tax Income x (1 - tax rate). Net income can also include one-time and non-operating items — gains on asset sales, restructuring charges, impairments — which is why analysts often look at 'adjusted' or normalized net income to gauge underlying earnings power.
How Net Income Links the Three Statements
Net income is the hinge of the three-statement model. It's the bottom line of the income statement; it's the FIRST line of the operating section of the cash flow statement, where you add back non-cash charges and adjust for working capital to get to cash; and net income minus dividends flows into retained earnings on the balance sheet. This is why interviewers love the question 'If net income goes up by $10, walk me through the three statements' — it tests whether you understand these linkages and the tax effect at every step.
Net Income vs. Cash Flow
A profitable company on paper can still run out of cash, and vice versa, because net income is an accrual measure. It includes non-cash charges like depreciation and amortization (which reduce net income but don't consume cash) and recognizes revenue before cash is collected. It also IGNORES CapEx (a real cash outflow that doesn't hit the income statement directly) and changes in working capital. That's why the cash flow statement exists — to reconcile net income to actual cash. The strongest interview answer: 'Net income tells you accounting profitability; free cash flow tells you cash generation, and they can diverge sharply.'
Net Income and EPS
Net income is the numerator in earnings per share, but with an adjustment: you subtract preferred dividends to get 'net income available to common shareholders,' then divide by diluted shares outstanding. Because net income sits below interest and taxes, it's sensitive to capital structure and tax rate — two companies with identical operations but different leverage will report different net incomes. This is precisely why bankers prefer capital-structure-neutral metrics like EBITDA for comparing operating performance, while still using net income for equity-level metrics like P/E and EPS.
Worked Example — With Real Numbers
A company has Revenue of $1,000M, COGS of $600M, and operating expenses of $200M, giving Operating Income (EBIT) of $200M. It pays $40M of interest, leaving Pre-Tax Income of $160M. At a 25% tax rate, taxes are $40M, so Net Income = $160M - $40M = $120M. If the company has 60M diluted shares and no preferred stock, EPS = $120M / 60M = $2.00. Note that net income ($120M) is well below EBITDA, since it absorbs interest, taxes, and D&A.
Key Takeaways
Net income is the bottom line — profit after ALL expenses including interest and taxes
It's the top line of the cash flow statement and feeds retained earnings on the balance sheet
Net income ≠ cash flow — it includes non-cash charges like D&A and ignores CapEx and working capital
It's the numerator in EPS (Net Income to common ÷ diluted shares)
Below the operating line, it's affected by capital structure (interest) and tax rate, unlike EBIT or EBITDA
Common Mistakes in Interviews
Saying net income equals cash flow — it includes non-cash items and excludes CapEx and working-capital changes
Forgetting to subtract preferred dividends when computing EPS from net income
Confusing net income with operating income — net income is AFTER interest and taxes
Assuming positive net income means the company generated cash — a profitable company can still burn cash
How Interviewers Test This
The single most common technical question in banking interviews: 'If net income increases by $10, walk me through the three statements.' Practice it until automatic — income statement net income +$10; cash flow statement starts at +$10 net income, cash up $10 (assuming no other changes); balance sheet cash +$10 on assets, retained earnings +$10 on equity, and it balances. Also be ready for 'Why isn't net income the same as cash flow?' — cite D&A, CapEx, and working capital.
Related Concepts
Directly referenced in this topic
Income Statement
The income statement (also called the profit and loss statement or P&L) reports ...
Earnings Per Share (EPS)
Earnings per share (EPS) divides a company's net income by its shares outstandin...
Retained Earnings
Retained Earnings are the cumulative net profits a company has earned over its l...
Operating Income
Operating Income (essentially the same as [EBIT](https://www.ibflash.com/concept...
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