Key points
A profit and loss statement reports revenue, expenses, and the resulting profit or loss for a period. It is the same as the income statement.
At software and AI companies, cost of revenue should hold inference, hosting, and support costs that scale with customers.
A blended gross margin can hide a low-margin usage stream. Break revenue and cost of revenue out by how you charge.
Misclassifying production cloud costs as R&D leaves net loss unchanged but overstates gross margin, the line investors compare.
The P&L uses accrual accounting, so a startup can report a loss and still grow cash from prepayments in the same quarter.
The P&L in one paragraph
A profit and loss statement, or P&L, reports revenue earned and expenses incurred over a period, and the profit or loss left over. It is the same document as the income statement or statement of operations. Under accrual accounting, it records revenue when earned and costs when incurred, not when cash moves.
For SEC registrants, Regulation S-X Rule 5-03 lists the captions that belong on the statement, from revenue and costs of revenue through earnings per share. Private startups are not bound by that rule, but auditors and investors expect a similar layout.
Anatomy of a P&L at a usage-based company
Most explainers use a retailer. Software and AI companies fill the same lines with different costs, and the choices change the margin investors see.
Revenue. Split recurring platform fees from usage. Each behaves differently and is recognized on a different pattern under ASC 606.
Cost of revenue. Costs to deliver the service: inference and model API spend, production hosting, third-party data, payment processing, and support staff. See cost of goods sold.
Gross profit. Revenue minus cost of revenue. This is where AI pricing problems show up first. See gross margin.
Operating expenses. R&D, sales and marketing, and G&A. See operating expenses.
Other income and expense. Interest earned on treasury balances, interest on venture debt, and foreign exchange gains or losses.
Taxes and net income. Startups often owe state minimums or foreign taxes even when losing money.
Worked example: Fieldnote AI's quarterly P&L
Fieldnote AI is a fictional Series B company with usage-based pricing. It sells a platform subscription plus credits that customers consume. Figures are illustrative.
Line | Q3 (illustrative) | % of revenue |
|---|---|---|
Platform subscription revenue | $2,000,000 | 40% |
Usage revenue (credits consumed) | $3,000,000 | 60% |
Total revenue | $5,000,000 | 100% |
Inference and model API costs | ($1,300,000) | 26% |
Cloud hosting for production | ($400,000) | 8% |
Support and onboarding staff | ($300,000) | 6% |
Gross profit | $3,000,000 | 60% |
Research and development | ($1,800,000) | 36% |
Sales and marketing | ($1,500,000) | 30% |
General and administrative | ($700,000) | 14% |
Operating loss | ($1,000,000) | (20%) |
Interest income, net of interest expense | $50,000 | 1% |
Income tax expense | ($10,000) | 0% |
Net loss | ($960,000) | (19%) |
The blended 60% gross margin looks acceptable. Split by stream, it tells a different story.
Revenue stream | Revenue | Direct costs | Gross profit | Gross margin |
|---|---|---|---|---|
Platform subscription | $2,000,000 | $400,000 | $1,600,000 | 80% |
Usage | $3,000,000 | $1,600,000 | $1,400,000 | 47% |
Blended | $5,000,000 | $2,000,000 | $3,000,000 | 60% |
Usage revenue is growing faster but earns 47%. If usage keeps rising as a share of revenue, blended gross margin falls every quarter. That is a pricing conversation, and only a P&L built by stream shows it early.
The classification entry that changes the story
A frequent close finding: production cloud costs sit in R&D because engineering owns the AWS account. Fieldnote's controller finds $120,000 of production hosting coded to R&D in Q3 and reclassifies it.
Account | Debit | Credit |
|---|---|---|
Cost of revenue: cloud hosting | $120,000 | |
Research and development: cloud | $120,000 |
Net loss does not change. Gross margin drops 2.4 points. Investors who compare gross margin across companies care much more about that line than the net figure.
P&L vs balance sheet vs cash flow statement
Profit and loss statement | Balance sheet | Cash flow statement | |
|---|---|---|---|
Question it answers | Did we earn more than we spent this period? | What do we own and owe today? | Where did cash actually go? |
Time frame | A period (month, quarter, year) | A single date | A period |
Basis | Accrual under GAAP | Accrual under GAAP | Cash, reconciled to net income |
Startup use | Gross margin, burn quality, board pack | Working capital, deferred revenue, debt | Runway and financing needs |
A startup can show a P&L loss and positive operating cash flow in the same quarter. Annual prepayments raise cash before the revenue reaches the P&L. The reverse is also common when large customers pay on long terms.
Common mistakes we see at close and audit
Cash-basis revenue. Booking credits as revenue when the invoice is paid, instead of as they are consumed. See accrual vs cash accounting.
Inference costs booked a month late. Model API invoices arrive after month end. Without an accrual, gross margin swings with invoice timing, not with the business.
Everything in one revenue line. One blended number hides which product is losing margin.
Sales commissions expensed upfront. Under ASC 340-40, incremental costs of obtaining a contract are generally capitalized and amortized, with a practical expedient for periods of one year or less.
Stock-based compensation missing. It is a real GAAP expense, spread across R&D, sales, and G&A by who holds the grants.
How to review a P&L before it goes to the board
Compare each line to last month and last year, and explain any move over your materiality threshold.
Check that usage revenue ties to the usage database, not only to invoices.
Confirm cost of revenue includes every vendor that scales with customer usage.
Recompute gross margin by stream and by top customers.
Reconcile net loss to the change in cash so the board sees both views.
How Quanta handles it
Quanta builds the P&L around how a company charges, so usage, credits, and platform fees land on separate lines. COGS lines are tagged at the source from cloud bills and model vendors. The in-house accounting team closes the books. Finance leads can query any P&L line in Claude through the Quanta MCP, down to the journal entry.
Quanta perspective
In usage-based and AI pricing, gross margin by revenue stream matters more than the total revenue line. A P&L that blends platform fees and usage will look healthy until usage becomes most of revenue. Build the P&L by how you charge from the first close.
Frequently asked questions
Is a profit and loss statement the same as an income statement?
Yes. P&L, income statement, and statement of operations all refer to the same report of revenue, expenses, and net income or loss for a period.
How often should a startup produce a P&L?
Monthly. Boards and lenders usually expect monthly or quarterly reporting, and a monthly close catches accrual and classification errors while they are still small.
What goes in cost of revenue for a SaaS or AI company?
Costs that scale with delivering the service: production hosting, inference and model API costs, third-party data, payment processing, and customer support and onboarding staff.
Can a company be profitable on the P&L but run out of cash?
Yes. Revenue can be recognized before customers pay, and spending on equipment or prepaid contracts reduces cash without hitting the P&L right away.
What is the difference between a single-step and multi-step P&L?
A single-step P&L subtracts total expenses from total revenue. A multi-step P&L shows gross profit and operating income separately, which is the format investors expect from startups.