P&L statement
A profit and loss statement (P&L, or income statement) totals a store's revenue for a period and subtracts costs in order - cost of goods, variable selling costs, then fixed overheads - to arrive at profit. An ecommerce operator uses it to answer whether the store actually made money last month, and where the money went.
| Variable | What it covers |
|---|---|
| Revenue | Net sales for the period, after discounts, refunds and gift cards. |
| COGS | Landed cost of the units sold in the period - product plus freight-in plus duty, matched to sales, not to purchase orders. |
| Variable selling costs | Fulfilment, shipping, payment fees and ad spend - the variable costs that move with orders. |
| Fixed operating costs | Rent, salaries, software - the fixed costs that move with time, not volume. |
Worked example
Example numbers. The shape is the point: the same step-down taught on The Math, with a visible contribution line before fixed costs land.
What is a good P&L statement?
There is no benchmark bottom line - a healthy operating profit depends on your margin structure and category, because a lean-COGS brand and a heavy-freight brand can post the same revenue with very different keep. What you can judge is the shape and the trust. A good ecommerce P&L separates variable from fixed costs so a contribution margin line is visible, matches COGS to units sold, and survives ledger reconciliation. Build your own with the free Shopify P&L template.
P&L statement vs related metrics
| Metric | What it measures | How it differs from the P&L |
|---|---|---|
| Ledger reconciliation | Whether reported figures match an independent record. | The trust check on the P&L - a statement is only worth reading after it ties out. |
| Contribution margin | Revenue minus variable costs, per order or in total. | A sub-total inside a well-built P&L - the line that makes scale decisions visible. |
| Gross margin | Revenue minus COGS. | The first stage of the P&L step-down; it stops before selling costs. |
| Net margin | Profit after all costs, as a share of revenue. | The P&L's bottom line expressed as a percentage, not a report of its own. |
Common mistakes
- Mixing cash and accrual timing. Booking ad spend when the card is charged but revenue when the payout lands makes the periods stop matching - pick one basis and hold it.
- Booking COGS when inventory is bought. COGS belongs to the units sold in the period. Expensing the whole purchase order makes buying months look terrible and selling months look free.
- One flat "marketing" line. Lumping variable ad spend with fixed retainers and tools hides the contribution line - split what moves with orders from what does not.
- Never reconciling it. The store dashboard, the payment processor and the bank rarely agree by default - an unreconciled P&L is a story, not a statement.
- Ignoring refunds and gift cards. Revenue must be net of refunds in the period they happen, and gift cards are a liability until redeemed, not revenue when sold.
P&L statement FAQ
Related
Blufire runs this exact step-down live and reconciles it against your ledger - the tie-out story on The Math walks a $5.76M store to the dollar, and S11 Planning & Forecasting projects the same P&L forward.
Updated July 2026