Reading a P&L (Income Statement) Line by Line

The P&L is the report you will look at most as a founder. "P&L" stands for Profit and Loss statement. Another name for the exact same thing is the Income Statement. Both names mean: a list of the money your business earned over a period of time (a month, a quarter, or a year) minus everything it spent in that period, ending with the profit left over.

Think of it as one long subtraction problem. You start with all the money that came in at the top, then subtract costs in a fixed order, one layer at a time. Each time you subtract a layer, you reach a new "profit" number. By the bottom, you know if you actually made money or lost it.

The order of the lines (the only order that matters)

Here is the standard top-to-bottom order. Don't worry about the details yet — we define each line below. Just notice that costs get subtracted in groups, and after each group you get a "profit" checkpoint.

1. Revenue (the "top line")
2. minus COGS (Cost of Goods Sold)
3. = Gross Profit → and its Gross Margin %
4. minus Operating Expenses (Sales & Marketing, R&D, G&A)
5. = Operating Income / EBIT
6. (EBITDA sits near here — explained below)
7. minus Interest and Taxes
8. = Net Income (the "bottom line") → and its Net Margin %

Line 1 — Revenue (the "top line")

Revenue is all the money you earned from selling your product or service, before subtracting any costs. People call it the "top line" simply because it sits at the very top of the P&L. It is also called sales or turnover.

Important: revenue is money you earned, not necessarily cash you collected. If you delivered a product in June, it counts as June revenue even if the customer pays you in July. (That cash-timing difference is why the cash-flow statement exists — but on the P&L we count what was earned.)

Line 2 — COGS (Cost of Goods Sold)

COGS is the direct cost of making or delivering the thing you sold. The key word is direct: only costs that go up when you sell one more unit, and that are needed to actually produce or deliver the product, belong here.

What COGS includes — physical product vs SaaS

Line 3 — Gross Profit and Gross Margin %

Gross Profit = Revenue − COGS. It is the money left after paying to make/deliver the product, but before paying for the rest of the company (offices, salespeople, etc.).

Gross Margin % turns that into a percentage so you can compare across sizes and over time:

Gross margin tells you how much of every sales dollar is left to run the company and (hopefully) keep as profit. At 70%, every $1 of sales leaves 70 cents.

"Above the line" vs "below the line"

The "line" people mean is usually Gross Profit. Costs above the line are COGS — the direct cost of delivery. Costs below the line are operating expenses — running the rest of the company (salaries, rent, marketing). Knowing which side a cost sits on changes your gross margin, so be consistent and honest about it.

Line 4 — Operating Expenses (OpEx)

Operating Expenses are the costs of running the business that are not the direct cost of the product. They usually split into three buckets:

• Sales & Marketing (S&M) — ads, salespeople, events, anything to win and keep customers.
• R&D (Research & Development) — building and improving the product; mostly engineering/product salaries.
• G&A (General & Administrative) — the "keep the lights on" costs: rent, accounting, legal, HR, office software, the CEO's salary.

Fixed vs variable costs

A variable cost rises when you sell more (raw materials, hosting, payment fees). A fixed cost stays the same no matter how much you sell, at least for a while (office rent, salaries, your accounting software). COGS is mostly variable; G&A is mostly fixed. This matters because fixed costs get cheaper per sale as you grow — you spread the same rent over more revenue.

Line 5 — Operating Income (EBIT)

Operating Income = Gross Profit − Operating Expenses. It is the profit from your core business, before interest and taxes. Its other name is EBIT = Earnings Before Interest and Taxes. "Earnings" just means profit. So EBIT literally reads "profit before we subtract interest and taxes." It answers: does the business itself actually make money?

EBITDA — one more profit view

EBITDA = Earnings Before Interest, Taxes, Depreciation, and Amortization. Start with EBIT, then add back two "paper" costs: depreciation (spreading the cost of a physical asset, like a machine, over its life) and amortization (the same idea for non-physical things, like software you bought). These two are accounting entries, not cash leaving your bank this month, so EBITDA estimates the cash your operations throw off.

Line 6 — Interest & Taxes

Interest is what you pay to lenders if you borrowed money. Taxes are what you owe the government on your profit. Both are subtracted near the bottom because they depend on choices (how much you borrowed) and rules (tax rates) outside your core operations.

Line 7 — Net Income (the "bottom line") & Net Margin %

Net Income = what is left after subtracting everything: COGS, all operating expenses, interest, and taxes. It is called the "bottom line" because it sits at the very bottom. If it is positive, you made a profit. If negative, you made a loss (often shown in parentheses or red).

A full worked sample P&L

Here is a complete P&L for a small software company with $100,000 of monthly revenue. Every margin is computed so you can follow the math.

Walk the math: $100,000 − $30,000 = $70,000 gross. $70,000 − $25,000 − $15,000 − $10,000 = $20,000 operating income. Add $3,000 depreciation/amortization back to get $23,000 EBITDA. From operating income, $20,000 − $2,000 interest − $4,000 tax = $14,000 net income.

ASCII waterfall — revenue down to net income

 Revenue                          $100,000
   |
   |-- COGS .................. -$30,000
   v
 Gross Profit .................. $70,000   (70%)
   |
   |-- Sales & Marketing ..... -$25,000
   |-- R&D .................... -$15,000
   |-- G&A .................... -$10,000
   v
 Operating Income / EBIT ....... $20,000   (20%)
   |  (+ D&A $3,000  ->  EBITDA  $23,000, 23%)
   |
   |-- Interest .............. -$2,000
   |-- Taxes ................. -$4,000
   v
 Net Income (bottom line) ...... $14,000   (14%)

What "good" looks like

Sources: Benchmarkit 2025 SaaS Benchmarks, CloudZero SaaS Gross Margin Benchmarks, CloudZero SaaS COGS, StockTitan EBITDA vs Operating Margin, CFI Rule of 40.