How to Read a Website P&L Before You Buy or Sell

Why the P&L is the whole deal

A profit-and-loss statement shows what a site actually earns after costs, and since website prices are a multiple of profit, the P&L is the single most important document in any sale. Whether you're buying or selling, being able to read one properly — and question it — is what separates a fair deal from an expensive mistake. It's worth understanding line by line.

Revenue: look for concentration

Start at the top with revenue, but don't stop at the total — look at how it's split. Income concentrated in a single affiliate program, ad network, or product is riskier than the same total spread across several sources. A P&L that breaks revenue out by source tells you far more about durability than one that shows a single lump number.

Expenses and add-backs

Below revenue come the costs: hosting, tools, content, contractors, ads, and fees. Watch for 'add-backs' — expenses a seller argues won't transfer to a new owner, like their own salary or a one-time redesign — because they raise the profit the price is based on. Legitimate add-backs are fair; aggressive or vague ones inflate the valuation and deserve scrutiny.

Red flags to catch

Be alert to numbers that don't reconcile with analytics or payment records, expenses that seem too low to be real (no content or tool costs on an active site), sudden unexplained revenue spikes right before a sale, and 'profit' that leans heavily on optimistic add-backs. A clean, verifiable, source-broken-out P&L builds trust; a vague or suspiciously tidy one is a reason to dig deeper before money moves.

What a website P&L should contain

At minimum: revenue split by source, cost of goods if anything is sold, and operating costs broken into content, hosting and infrastructure, software, contractors, advertising and everything else. Monthly columns across twenty-four months, not an annual summary, because the monthly view is what reveals seasonality, one-off spikes and whether a trend is real. A single-figure annual profit number is not a profit and loss, it is an assertion.

Reading the revenue lines for concentration

Read revenue by source and calculate each as a percentage of the total. Any source above roughly 60% is a concentration risk that belongs in the valuation. Then check consistency month to month: a source that appears in only four of twenty-four months is not recurring income, whatever the annual total suggests. Look for the reporting period to match the platform's own dashboard rather than a calendar reconstruction.

Where costs are usually understated

Four lines are routinely missing or too low. Content, priced at what it costs to sustain publishing rather than what the owner spent while writing it themselves. Software, where personal-plan pricing will reprice for a business buyer. Contractors, sometimes paid informally and not recorded. And owner labour, which is not a cash cost but is a real one, since the buyer must either do the work or pay someone. Rebuild these at your own cost base before applying any multiple.

Understanding add-backs without being misled

Add-backs adjust accounting profit toward what a new owner would actually earn: owner compensation, one-off expenses, costs that will not transfer. Legitimate add-backs are specific, dated and explained. The ones to challenge are vague categories, recurring costs described as one-offs, and anything the buyer will in fact still have to pay. A well-documented add-back schedule raises the valuation fairly; a padded one collapses under scrutiny.

The three checks that catch most problems

First, does revenue in the P&L reconcile to each platform's own reports, month by month. Second, does the margin move over time, since a quietly compressing margin is a trend the annual figure hides. Third, does the cost base look like a business or like a hobby, meaning are the expenses consistent with the volume of work the site visibly requires. Anything failing these three needs answering before the number means anything.