Profit and Loss Statement: What It Is and How to Read One

A profit and loss statement — also called a P&L or an income statement — shows what your business earned and what it spent over a set period, and the difference between the two is your profit. It answers one question: over the last month, quarter, or year, did this business make money?

That is the whole idea. The reason it confuses people is that it arrives alongside two other reports that look similar and answer completely different questions.

The short answer

Here is a full year for a fictional S-corp landscaping company with $500,000 in revenue. Every P&L you will ever see has this shape, whatever the business.

Gross margin is 50% ($250,000 ÷ $500,000). Net margin is 14% ($70,000 ÷ $500,000). Those two percentages are most of what the statement is for.

How is a P&L different from a balance sheet and a cash flow statement?

The three statements cover the same business from three angles, and mixing them up is a common reason owners misread their own numbers.

• The P&L covers a period. January, Q3, last year. It resets to zero when the period ends. It tells you whether you were profitable.
• The balance sheet is a snapshot. It shows what you own, what you owe, and what's left over as of one specific date — December 31, say. It doesn't reset. It tells you what the business is worth on paper.
• The cash flow statement covers a period too, but tracks cash moving in and out, split between operating, investing, and financing activity. It tells you whether you can make payroll.

The practical consequence: a business can be profitable and still run out of money. Show a $70,000 net income, buy a $60,000 truck outright, and let $40,000 of invoices go unpaid, and your bank balance tells a very different story than your profit line. The truck barely touches the P&L in year one — only its depreciation does — while the cash flow statement records the whole $60,000. That gap is why lenders ask for all three.

What does each line actually mean?

Revenue (also "sales" or "top line") is what you billed customers for work you delivered in the period. It is not what landed in the bank — that distinction is the cash-vs-accrual question further down.

Cost of goods sold is what it cost to deliver that specific revenue. For our landscaper: crew wages, mulch and plants, fuel for the trucks on job sites. The test is whether the cost scales with the work. No jobs this month means no mulch. Service businesses sometimes label this "cost of revenue" or "cost of services" — same idea.

Gross profit is revenue minus COGS: $250,000. This is what's left to run the company with after you've paid to do the actual work.

Operating expenses are the costs of being in business at all, whether or not you book a single job:

You'll also see these called SG&A, or overhead. Depreciation and amortization typically sit here too.

Operating income is gross profit minus operating expenses: $75,000. This is profit from the actual business, before financing and one-offs, and it's the cleanest measure of whether the operation works.

Other income and expense is everything that isn't the business's core activity. Our landscaper paid $8,000 of interest on a truck loan and booked a $3,000 gain selling an old mower, for a net of ($5,000). Interest, gains and losses on asset sales, and investment income all live here — deliberately separated so a good operating year isn't flattered by a lucky equipment sale.

Net income — the bottom line — is $70,000.

One thing that trips owners up: there's no income tax line here. This company is an S corp, so federal income tax passes through to the owner's personal return rather than hitting the business P&L. A C corp would show an income tax expense line right above net income. State franchise and gross receipts taxes usually appear as an operating expense either way.

Gross margin vs. net margin: which should you watch?

Gross margin is gross profit ÷ revenue: 50% here. Net margin is net income ÷ revenue: 14%.

Net margin gets the attention because it's the bottom line, but gross margin is the number most small owners should watch month to month. Three reasons:

1. It moves first. Underpricing a job, a materials price increase, or crew hours creeping up all hit gross margin immediately. Net margin buries the same signal under rent and insurance, which don't change month to month.
2. It's the number you can act on this week. You can reprice, requote, or tighten scheduling. You cannot renegotiate your lease by Friday.
3. It tells you whether growth will help. If gross margin is healthy and you're unprofitable, more volume fixes it — the overhead is already paid for. If gross margin is thin, more volume makes the problem bigger, faster. Owners who only watch net income routinely get this backwards and sell their way further into trouble.

Track gross margin as a percentage, not a dollar amount, and track it by month. A drift from 50% to 44% over a quarter is a real problem that a rising revenue line will hide completely.

Should you run it monthly, quarterly, or annually?

Monthly is the default, and it's the one that matters. A monthly P&L is close enough to the events to still be actionable — you can see a bad month in February and do something in March. This is the report a bookkeeper produces for you after each month's close, usually alongside a balance sheet, within a week or two of month end.

Quarterly is useful for smoothing. If your revenue is seasonal or lumpy, single months look alarming for no reason and a rolling three-month view is a fairer read. Quarterly also lines up with estimated tax payments.

Annually is for outsiders: the tax return, a loan application, a valuation. It's the wrong resolution for running the business — by the time an annual P&L shows a problem, you've lived with it for a year.

How does cash basis vs. accrual change the P&L?

This is a bookkeeping decision that visibly changes the numbers on the page. The short version is below; the full comparison, including who is required to use accrual, is in cash vs. accrual accounting.

Cash basis records revenue when the money arrives and expenses when you pay them. It's simple and it tracks your bank account closely.

Accrual basis records revenue when you earn it and expenses when you incur them, regardless of when cash moves. Invoice a $20,000 job in March and get paid in May, and accrual puts the $20,000 in March — matched against the March costs of doing the work.

The same business, same year, produces different monthly profit under each. Cash basis makes a company with slow-paying customers look volatile — a quiet month where three invoices happen to clear reads as a triumph. Accrual gives a truer picture of whether the work is profitable, at the cost of a P&L that doesn't match your bank balance.

Accrual is required under GAAP, and it's what lenders and investors generally expect. Many small businesses are still eligible to use cash basis for tax purposes under a gross receipts threshold the IRS adjusts for inflation; eligibility also depends on your entity type and whether you carry inventory. Confirm your position with a CPA rather than assuming — and note that you can keep books on accrual for management and have your accountant convert for the return.

What are the most common mistakes?

Owner draws booked as an expense. Money you take out of the business as a draw or distribution is not an expense — it's a reduction of equity, and it belongs on the balance sheet. Our landscaper took $40,000 in distributions on top of the W-2 salary, and none of it appears on the P&L. Booking draws as an expense understates your profit, which quietly misleads you, your lender, and your tax return. (The W-2 salary an S-corp owner pays themselves is a legitimate expense. The distribution is not. Owners of sole proprietorships and partnerships generally take draws, not salary.)

COGS and operating expenses mixed together. If crew wages land in general payroll, or the office manager's salary lands in COGS, your gross margin is fiction — and gross margin is the number worth watching. Pick a rule for each cost category, write it down, and apply it consistently. Consistency matters more than getting every judgment call perfect, because the trend is what you're reading.

Personal spending run through the business. The phone bill, the family car, the trip that was mostly a vacation. Beyond the tax exposure, it corrupts the one report you use to judge whether the business works. If you can't tell whether the company is profitable without mentally subtracting things, the P&L has stopped doing its job.

Uncategorized transactions parked in "Ask my accountant." A P&L with $18,000 in a suspense account isn't finished. It's a routine find in a cleanup engagement, and it makes every ratio above it unreliable.

Who reads your P&L?

You, ideally every month, to catch margin drift while it's still small.

Lenders, who want two to three years of P&Ls plus the balance sheet and often personal returns. They read it for consistency and debt service capacity, and they notice when the P&L disagrees with the tax return.

Investors and buyers, who care about operating income more than net income — they're valuing the operation, not your financing choices, and they'll normalize out owner compensation and one-offs.

Your CPA, at tax time, who is far cheaper to work with when the statement is already clean.

How do you actually make one?

For most businesses, you don't build it from scratch — accounting software generates it from categorized transactions. If you'd rather start from a blank one, there's a P&L template with every standard line item you can copy into a spreadsheet. Either way the work is upstream:

1. Separate business banking. Nothing else works without this.
2. Categorize every transaction, with a consistent rule for COGS vs. operating expenses.
3. Reconcile bank and credit card accounts monthly against statements.
4. Close the month, then run the P&L for that month and the year to date.
5. Compare against prior periods and ask about anything that moved more than ~10%.

Steps 2 through 4 are what a bookkeeper does; step 5 is yours and nobody can do it for you.

What to do next

Pull last month's P&L and calculate two numbers: gross margin and net margin. Then pull the same month a year ago and do it again. If gross margin has moved more than a couple of points, you've found your first question.

If nobody is producing the statement monthly, that's the gap to close first. Compare firms offering bookkeeping services, or narrow to bookkeepers who work with small businesses. Ask what day of the month reports arrive, whether the P&L comes with a balance sheet, and whether a walkthrough is included or billed separately — our guide to what a bookkeeper costs covers what those engagements go for.

Of the 13,986 US accounting firms in our directory, 6,464 advertise bookkeeping and 1,507 specifically name financial statement preparation. If you need statements formatted for a lender or investor rather than just monthly management reports, that narrower group is where to start — a compilation, review, or audit is a different engagement from monthly close.

Firm counts come from the AccountingNearYou dataset as of 13 August 2026: 13,986 US accounting firms profiled from their own public websites, counted as offering a service when they say so on the pages we crawled. The worked example is illustrative, not a benchmark. Cash-basis eligibility, entity treatment, and where tax lines belong depend on your situation — confirm them with a CPA before relying on them.