P&L (Profit and Loss)

Amazon & D2C glossary · Harpy Media

A P&L (Profit and Loss) is the statement that turns marketplace activity into business truth: what you earned, what it cost, and what survived. Revenue at the top, every cost category below it, net profit at the bottom — the document that separates a business from a dashboard.

What is P&L?

A P&L (Profit and Loss) is the statement that turns marketplace activity into business truth: what you earned, what it cost, and what survived. Revenue at the top, every cost category below it, net profit at the bottom — the document that separates a business from a dashboard.

For Amazon sellers the value is specifically in disaggregation. Marketplace costs arrive as referral fees, fulfilment and storage charges, advertising spend, promotional costs, and returns — each with its own behaviour and its own fix. A P&L laid out properly shows which of them is consuming the margin, instead of leaving a single net figure to be argued about.

What belongs in it

Start with gross revenue before marketplace deductions, then work down honestly. Cost of goods sold at landed cost. Referral fees. Fulfilment and storage. Advertising. Promotional discounts and deals. Returns and refunds, including the often-overlooked cost of returned inventory that cannot be resold. Then the operating layer: software, insurance, contractors, and any overhead attributable to running the channel.

The comparison that matters most is against a second period, not against a feeling. A month-on-month P&L shows whether margin compression is coming from price, cost, fees, or advertising — and those four have completely different remedies. Without the statement, every margin discussion is an opinion.

Using it to run the business

The monthly routine is straightforward: reconcile against settlement reports so the costs in the P&L are the ones actually deducted rather than the ones budgeted, calculate net margin, and compare it with the prior period. Then act on the largest adverse movement specifically — renegotiate freight, reprice a line, prune an advertising campaign, or fix a returns cause.

At product level the same exercise decides strategy: which lines fund growth and which quietly consume it. Brands that keep a P&L by product rather than only for the business as a whole catch margin problems while they are still small, which is the only time they are cheap to fix.

In practice

A brand records $50,000 of gross revenue for the month. The P&L deducts $12,000 landed cost of goods, $7,500 in referral fees, $11,000 in fulfilment and storage, $5,000 in advertising, and $2,500 of fixed operating costs — leaving $12,000 of net profit, a 24% margin. With that number in hand, the decision to increase November advertising is made against evidence rather than appetite.

How Harpy Media helps

Financial visibility is the foundation of our work with brands: P&Ls reconciled to settlement data, margin tracked monthly by product, and decisions on pricing and spend taken from the numbers rather than the dashboard.

P&L FAQ

What is a P&L for an Amazon seller?

A profit and loss statement summarising revenue and every cost the account incurs over a period — product cost, platform fees, fulfilment and storage, advertising, promotions, and operating expenses — to show true net profit.

Why is a P&L important on Amazon?

Because marketplace costs are numerous and easy to under-notice. A structured statement reveals margin erosion while it is still correctable, and turns pricing, promotion, and advertising decisions into arithmetic.

Should I keep a P&L per product?

Yes, ideally. Account-level P&Ls hide unprofitable lines that are being scaled, while product-level statements show which items fund the business and which quietly consume it.