What a profit and loss account shows you

A profit and loss account (also called a P&L statement or income statement) is a record of your business's money coming in and money going out over a set period—usually a month, quarter, or year. It shows whether you made money, lost money, or broke even. The math is straightforward: revenue minus expenses equals profit or loss.

You build a P&L by listing every dollar your business took in, subtracting every dollar it spent, and seeing what remains. Banks, accountants, and investors use this document to understand whether your business is actually making money or just moving cash around. If you have a business bank account, your bank statements give you the raw data; a P&L organizes that data into a shape that tells a story.

Unlike a balance sheet (which shows what you own and owe at a single moment), a P&L covers a period of time. It answers the question: did this business make money this month, or did it burn through cash?

Key Takeaways

  • A profit and loss account lists revenue at the top, subtracts cost of goods sold, then subtracts operating expenses, to show net profit or loss.
  • You gather the numbers from your business bank account statements, invoices, receipts, and expense records for the time period you are measuring.
  • Revenue includes all money your business received; cost of goods sold includes only the direct costs to make or buy what you sold.
  • Operating expenses are everything else—rent, salaries, utilities, insurance—and are listed separately so you can see where money actually goes.
  • A P&L is usually prepared monthly, quarterly, or annually, and the format stays the same each time so you can compare one period to another.

Gather your numbers from bank and business records

Start by collecting every document that shows money in or out of your business bank account for the period you are measuring. Pull your bank statements for that month, quarter, or year. Then gather your invoices (what customers paid you), receipts (what you paid for supplies or services), payroll records, and any other proof of income or expense.

Organize these by category as you go. Create a folder or spreadsheet with sections for revenue, materials or inventory costs, payroll, rent, utilities, insurance, and any other expense your business has. The goal is to have every number accounted for and traceable back to a receipt or bank record. If you cannot find a receipt, note the amount and the date in your records anyway—you will need to track it.

If you use accounting software (QuickBooks, FreshBooks, Wave, or similar), much of this work is already done. The software sorts transactions by category as you log them. If you use a spreadsheet or paper records, you will do this sorting by hand. Either way, the principle is the same: every dollar in and every dollar out must be recorded and sorted.

List revenue at the top of your P&L

Revenue is all the money your business received during the period. This includes sales from customers, service fees, rental income, or any other money that came in because of your business. Do not include loans, money you put in from your personal account, or refunds you gave back—those are not business revenue.

Add up all your invoices and payments for the period. If you had multiple revenue streams (for example, product sales and consulting fees), list each one separately so you can see which part of your business brought in the most money. Then total them. This is your gross revenue or total revenue.

Some businesses also track returns and allowances—money you refunded or discounted. If this is significant, subtract it from gross revenue to get net revenue. For most small businesses, this number is small enough to ignore, but list it if it matters to you.

Subtract cost of goods sold

Cost of goods sold (COGS) is the direct cost to make or buy the thing you sold. If you run a bakery, COGS is flour, sugar, eggs, and packaging. If you offer consulting, COGS might be zero—you are selling your time, not a product. If you resell products, COGS is what you paid to buy them from your supplier.

Do not include rent, salaries, or utilities in COGS. Those are operating expenses. COGS is only the cost that would not exist if you had not made that sale. If you made nothing this month, you would have zero COGS but still owe rent.

Add up all your COGS for the period and subtract it from revenue. The result is gross profit. This number tells you whether the core business—before overhead—is profitable. A bakery with high flour costs but high revenue might still have good gross profit. A consulting firm with no COGS will have gross profit equal to revenue.

List operating expenses below gross profit

Operating expenses are everything else: rent, salaries, utilities, insurance, office supplies, marketing, phone bills, software subscriptions, vehicle costs, and professional fees. These are the costs of running the business that are not tied to making a specific product.

Break these into categories so you can see where money goes. Common categories are: payroll (salaries and wages), rent or lease, utilities, insurance, marketing and advertising, office supplies, professional services (accounting, legal), vehicle and travel, and miscellaneous. List each category with its total for the period.

Add up all operating expenses. Then subtract this total from your gross profit. The result is net profit (if the number is positive) or net loss (if it is negative). This is the bottom line: the money your business actually made or lost during the period.

Format your P&L so it is easy to read and compare

A standard P&L follows this order from top to bottom: revenue, cost of goods sold, gross profit, operating expenses, and net profit. Use this format every time you prepare a P&L so that you can compare one month to another or one year to another. Consistency makes it easy to spot trends—for example, whether expenses are growing faster than revenue.

Here is a simple template:

Revenue
Product sales$X
Service fees$X
Total Revenue$X
Cost of Goods Sold
Materials and inventory$X
Total COGS$X
Gross Profit$X
Operating Expenses
Payroll$X
Rent$X
Utilities$X
Insurance$X
Marketing$X
Total Operating Expenses$X
Net Profit (or Loss)$X

Use the same categories and order each period. If you add a new expense category one month, add it to future months too, even if it is zero. This consistency lets you spot real changes in your business rather than changes in how you organize the numbers.

Use your P&L to spot problems and make decisions

Once you have built your P&L, look at the numbers. Is net profit positive or negative? If negative, which expense category is the biggest drain? Is revenue growing or shrinking? Is gross profit healthy, or are your product costs too high?

Compare this period to the last one. If revenue dropped, was it across all products or services, or just one? If expenses grew, which category grew the most? These questions help you decide what to change: maybe you need to raise prices, cut an expense, or stop selling a product that costs too much to make.

Your bank will also want to see a P&L if you ever ask for a loan. Investors, partners, or accountants will ask for it too. A clean, accurate P&L shows that you understand your business and can manage money responsibly.

Frequently Asked Questions

What is the difference between a P&L and a balance sheet?

A P&L shows profit or loss over a period of time (a month, quarter, or year). A balance sheet shows what you own and what you owe at a single moment in time. You need both: the P&L tells you if the business is making money; the balance sheet tells you if the business is solvent.

Do I have to prepare a P&L every month?

No, but many business owners do because it helps them spot problems early. At minimum, prepare one quarterly or annually. The more often you prepare it, the faster you can react if something is wrong. Your accountant may require monthly or quarterly P&Ls for tax or loan purposes.

What if I have no cost of goods sold?

Then your gross profit equals your revenue. This is common for service businesses like consulting, accounting, or coaching. You still list COGS as a line item with zero, so the format stays consistent. Then subtract operating expenses to get net profit.

Can I use a spreadsheet or do I need accounting software?

A spreadsheet works fine, especially for a small business. Accounting software (QuickBooks, Wave, FreshBooks) saves time because it sorts transactions automatically, but it costs money and takes time to set up. Start with a spreadsheet if you are just beginning; move to software once you have more transactions than you can easily track by hand.

What if my numbers do not match my bank statement?

Check for timing differences: invoices you sent but have not been paid yet, or bills you owe but have not paid. These belong in your P&L when you earn or incur them, not when the money actually moves. Also check for math errors and make sure every transaction is accounted for. If you still cannot find the difference, ask your accountant or bank.