Reading your P&L as a business owner means checking five things in order: revenue (is it growing or shrinking?), cost of goods sold (are you paying more to deliver what you sell?), gross margin (what's left after direct costs?), operating expenses (what are you spending to run the business?), and net income (what actually hits the bottom line). You don't need an accounting degree — you need ten minutes and the habit of looking at it monthly, not once a year at tax time.
Most owners we talk to check their bank balance weekly and their P&L never — or only when something feels wrong. By then the problem is usually three months old.
Start at the top: revenue
Revenue is everything you billed or earned in the period — not cash collected, money earned. If you invoiced $120,000 in March but only collected $80,000, your revenue for March is still $120,000. The gap between billed and collected lives in accounts receivable on your balance sheet.
When you look at revenue, compare three ways:
- Month over month — is this month up or down from last month?
- Same month last year — are you ahead of or behind where you were a year ago?
- Year to date vs. last year to date — smooths out seasonal spikes
A single bad month isn't a crisis. Three consecutive months trending down is a conversation worth having.
Cost of goods sold (COGS) — what it actually costs to deliver
COGS is everything directly tied to producing or delivering what you sell: raw materials, direct labor on production, freight inbound on inventory, packaging, subcontractor costs on a job. It's not your rent, your marketing, or your admin salary — those come later.
The relationship between revenue and COGS gives you gross margin:
Gross margin = Revenue − COGS
Gross margin % = Gross margin ÷ Revenue
If you did $100,000 in revenue and $62,000 in COGS, your gross margin is $38,000, or 38%. That 38% has to cover everything else — rent, payroll, insurance, marketing — and still leave something for you.
Watch gross margin month to month. If revenue is flat but COGS is creeping up, your suppliers raised prices, your labor got less efficient, or your product mix shifted toward lower-margin items. Any of those is worth investigating before net income tells you there's a problem.
Operating expenses — where the money actually goes
Below gross margin you'll see operating expenses (sometimes called SG&A — selling, general, and administrative). Typical lines:
- Payroll and benefits — usually the biggest line for service businesses
- Rent and facilities
- Marketing and advertising
- Insurance
- Professional fees — accountant, lawyer, consultant
- Software and subscriptions
- Vehicle and travel
Don't just scan the total. Look for lines that moved significantly from last month or last year. A $400/month software subscription that crept to $1,200 over eight months is the kind of thing that shows up here — and that nobody notices until someone actually reads the report.
Net income — the bottom line (with caveats)
Net income is what's left after COGS, operating expenses, interest, and taxes. Positive net income means the business was profitable on paper for that period. Negative means you lost money.
Two important caveats owners miss:
Net income isn't cash. You can show a profit and still be tight on cash because customers haven't paid yet, you bought inventory ahead of demand, or you made a loan payment. Profit and cash are related but not the same — that's why you need the balance sheet too.
One month doesn't tell the story. A month with a big equipment purchase, a seasonal slowdown, or a one-time legal bill will look terrible in isolation. Look at trailing three months or year-to-date for a clearer picture.
The five-minute monthly habit
Once a month — first week of the month, before you get buried in operations — pull your P&L and answer these five questions:
- Is revenue up or down vs. last month and vs. same month last year?
- Is gross margin % holding steady, or drifting?
- Which operating expense line moved the most, and do I know why?
- Is net income positive? If not, is it a one-time thing or a pattern?
- Does this match what I felt was happening, or is something surprising me?
That last question is the most valuable. When the numbers surprise you — in either direction — that's where the real insight is.
When you want the numbers interpreted, not just read
Reading the P&L is step one. Knowing what to do about a shrinking margin, a payroll line that's out of proportion, or a revenue dip you can't explain is step two. That's where having a CFO-level advisor who can see your actual QuickBooks data — not a generic template — changes the conversation from "I think we're fine" to "here's exactly what's moving and what to fix first."
Helm connects directly to QuickBooks Online so your CFO advisor sees your real P&L before every conversation. Ask it to walk you through last month's numbers, flag what changed, or pressure-test whether you can afford a hire — grounded in your books, not a guess.