Net Income: What It Is & How Bookkeepers Calculate It

Your client's P&L shows $42,000 in net income. They're celebrating. Then you notice the tax provision is missing and two owner draws got booked as operating expenses. The real number is $61,000, but the retained earnings rollforward won't tie until you fix it.

Net income is the final number on the income statement. It determines the equity rollforward, the tax filing starting point, and what the owner thinks they made. Getting it right at close isn't optional.

What is net income?

Net income is the profit remaining after subtracting all costs from total revenue: cost of goods sold, operating expenses, interest, and income taxes. The formula is: Revenue minus COGS equals gross profit, minus operating expenses equals operating income, minus interest and taxes equals net income. For a business with $500,000 in revenue and $458,000 in total costs, net income is $42,000. Net income flows directly to retained earnings on the balance sheet at year-end close.

Key Takeaways

• Net income is the bottom line - it's what's left after every cost is subtracted from total revenue
• The formula has four layers - Revenue minus COGS minus OpEx minus Interest minus Taxes equals net income
• Net income differs from cash flow - accrual books can show a $42,000 profit while the bank balance drops $15,000
• At year-end, net income rolls to retained earnings - the balance sheet equity section must tie to the income statement exactly
• Owner draws do not reduce net income - they're equity transactions, not business expenses
• Missing tax provision is the most common close error - it overstates net income until the CPA adjusts

What Net Income Actually Is

Net income is the final line of the income statement (P&L). It's what's left after the business pays for everything: inventory, payroll, rent, software subscriptions, loan interest, and taxes.

It's often called the bottom line because it sits at the bottom of the income statement. Every line above it reduces revenue until you arrive at this number. Bookkeepers who work on accrual books will recognize it as the figure that feeds the retained earnings account at period-end close.

Net income is not cash. A business on accrual accounting records revenue when earned and expenses when incurred, regardless of when cash moves. You can have strong net income and a negative bank balance if receivables are slow.

The P&L Walkthrough: Revenue to Net Income

The income statement builds net income in layers. Here's how it works from top to bottom.

Revenue: All income the business earned in the period. For a product company, that's gross sales minus returns. For a service firm, it's fees billed.

Cost of Goods Sold (COGS): Direct costs tied to delivering the product or service: materials, direct labor, merchant processing fees. Subtract COGS from revenue and you get gross profit.

Gross Profit: Revenue minus COGS. A business with $500,000 in revenue and $200,000 in COGS has $300,000 in gross profit. This is the margin available to cover overhead.

Operating Expenses: Overhead not tied directly to production. Rent, utilities, salaries for non-production staff, software, marketing. Subtract operating expenses from gross profit and you get operating income (also called EBIT: earnings before interest and taxes).

Interest: Loan interest, line of credit fees. Subtract from operating income.

Taxes: Income tax provision. Subtract from pre-tax income and you arrive at net income.

The sequence: Revenue minus COGS = Gross Profit. Gross Profit minus OpEx = Operating Income. Operating Income minus Interest minus Taxes = Net Income.

Net Income vs. Gross Profit vs. Operating Income vs. EBITDA

These four metrics come from the same P&L but measure different things. Bookkeepers get asked about all of them.

Gross profit stops before operating expenses. It tells you how efficiently the business converts revenue into margin before overhead. A 60% gross margin on $500,000 in revenue means $300,000 available for operating costs and profit.

Operating income subtracts operating expenses from gross profit. It reflects the business's core earnings from operations before financing costs and taxes. Two businesses in the same industry with similar revenue can have very different operating incomes if their overhead structures differ.

EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization) adds back depreciation and amortization to operating income. Analysts use it as a proxy for operating cash generation because it strips out non-cash charges. It's not a GAAP metric and won't appear as a line on the P&L. Bookkeepers calculate it from the financials on request.

Net income is the most complete measure: everything counts, including interest, taxes, and non-cash charges like depreciation. It's the number that flows to retained earnings.

Accrual vs. Cash-Basis Net Income

This distinction causes more confusion than any other on the P&L.

On accrual books, revenue is recognized when earned and expenses when incurred. A $50,000 invoice sent in December and paid in January shows as December revenue. Expenses follow the same logic. Net income on accrual books reflects economic activity for the period.

On cash-basis books, revenue is recorded when cash is received and expenses when cash is paid. The December invoice doesn't hit revenue until January's payment clears. Cash-basis P&Ls are simpler but can distort profitability within a period.

The common error: a bookkeeper runs the cash-basis P&L in QuickBooks when the client's canonical books are on accrual. The numbers won't match the CPA's work. Always confirm the reporting basis before pulling financials for tax or advisory purposes.

How Net Income Flows to Retained Earnings

This is the close gate that ties the income statement to the balance sheet.

At the end of each accounting period, net income (or net loss) flows to retained earnings in the equity section of the balance sheet. The formula: Prior Retained Earnings plus Net Income minus Owner Distributions equals Ending Retained Earnings.

At year-end close, the bookkeeper must verify this rollforward ties exactly to the income statement. If the balance sheet retained earnings don't match the prior period balance plus current-year net income minus distributions, something is wrong. Common causes: a journal entry posted directly to retained earnings, an owner draw booked as an expense instead of a draw, or a prior-year adjustment that didn't flow correctly.

Retained earnings that don't tie is a hard stop before sending financials. The CPA can't begin the return until this reconciles.

See the cash flow statement for the bridge between net income and actual cash: the indirect method starts with net income and adjusts for non-cash items and working capital changes.

Common Errors That Distort Net Income

Owner draws coded as expenses. Owner distributions are equity transactions, not operating expenses. When a bookkeeper categorizes an owner draw as payroll or consulting expense, it reduces net income incorrectly. The fix: reclassify to an owner's draw or distribution equity account. This is one of the most common errors on small business books.

Missing tax provision. On accrual books, the income tax provision should be estimated and booked as an adjusting entry at period-end. Many bookkeepers skip it, especially on monthly closes. Net income is overstated until the CPA books the year-end tax accrual. If you're preparing monthly financials for tax planning, include an estimated provision.

Cash-basis P&L reported as accrual. QuickBooks defaults to cash basis in some reports. A client reviewing accrual financials with the bank often sees a different number than the QBO report you sent. Verify the reporting basis matches the engagement scope before every delivery.

How to Find Net Income in QuickBooks Online

In QBO: Reports > Profit and Loss. Set the date range, confirm the Accounting Method (Cash or Accrual) in the report header, and run. Net income appears at the bottom as the final line.

To drill into what's driving a high or low net income, click any line to see the underlying transactions. For the retained earnings tie, pull Reports > Balance Sheet and compare the equity section to the P&L bottom line.

If the P&L net income doesn't match what the balance sheet equity movement implies, look for manual journal entries posted directly to retained earnings. QBO doesn't restrict those.

Common Gotchas

Cash-basis P&L when accrual is the canonical books. QuickBooks remembers your last report setting, not your client's engagement scope. A single click on "Cash" vs "Accrual" shifts net income by thousands on a business with significant AR or AP. Set the default basis per client during onboarding and confirm it before every send.

Owner draws as expenses. A $5,000 monthly owner draw miscoded as officer compensation or consulting expense reduces net income by $5,000 every month. At year-end, the CPA finds $60,000 in phantom expenses. The fix is a reclassification journal entry, but it takes time to rebuild trust with the client who thought they were profitable.

Missing tax provision. No tax accrual means net income is overstated on every monthly close. When the CPA books the year-end provision, net income drops and the retained earnings rollforward requires adjusting every period-end balance sent to the client during the year.

Frequently Asked Questions

What's the difference between net income and gross profit?

Gross profit is revenue minus cost of goods sold. It measures production efficiency before overhead. Net income subtracts all remaining costs: operating expenses, interest, and taxes. A business can have strong gross profit and negative net income if overhead is too high relative to gross margin.

Can net income be positive while cash flow is negative?

Yes, frequently on accrual books. If a business invoices $100,000 in December but collects in January, net income includes the revenue in December while cash flow shows nothing until January. Accrual net income and cash flow diverge whenever receivables, payables, or deferred revenue are significant. The cash flow statement reconciles the gap.

Where does net income go at year-end?

Net income closes to retained earnings on the balance sheet. The prior retained earnings balance plus current-year net income minus any distributions equals the new retained earnings balance. This rollforward must tie exactly to the income statement before financials are final.

Why don't owner draws reduce net income?

Owner draws (for sole proprietors, partnerships, and S-corps) are equity transactions, not operating expenses. The owner is taking money out of the business, but that's not a cost of running it. Draws reduce the equity section of the balance sheet, not the P&L. Coding draws as expenses artificially reduces net income and can distort tax estimates.

What is the net income formula?

Revenue minus COGS equals Gross Profit. Gross Profit minus Operating Expenses equals Operating Income. Operating Income minus Interest minus Taxes equals Net Income. All five components come from the income statement. The tax line on accrual books should reflect an estimated provision, not just cash taxes paid.

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