Should you buy an online business or build one?

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Sale prices here are what closed, not what was asked, and the profit column is what each seller stated — not audited. Categories below our comp floor, and domain names (which are mostly bought as names rather than built as businesses), are left out. The sample leans toward small marketplace sales, which is where sold prices and profit figures are most often published together; where sold-price data comes from explains the skew.

The honest version of the buy case is not “you get revenue on day one.” It is that several things which take a builder months or years, and may never happen at all, arrive already done.

• Time. Content that has aged into its rankings, an app with its reviews, a store with its order history. None of this can be bought any faster by a builder.
• Resolved uncertainty. Someone has already found out whether people will pay for this. For a new project, that question is the largest risk, and it is the one a purchase removes.
• A track record to underwrite. Months of numbers you can check against payment processors and bank deposits, which a plan you have not started cannot give you.
• Working plumbing. Suppliers, integrations, an email list, a checkout that already works — each small, together weeks of work.

And what it does not buy: the seller's judgement, which leaves with them; any trust in the numbers you have not verified; and immunity from the platform the business depends on. A purchase can also carry problems a builder would never have created — a penalised domain, a churning customer base, a supplier about to raise prices. The due diligence checklist is where those get found.

Building looks cheaper mainly because its costs are harder to write down. Count all three.

• Your time, at a price. Hours to first revenue, multiplied by what those hours are worth to you. People who price a purchase to the dollar routinely price their own months at zero.
• Cash. Tools, hosting, design, content, inventory, ads — whatever the category needs before anyone pays you.
• The chance it never reaches revenue. This is the cost that decides most comparisons, and it is the one nobody can quote for you. We do not hold data on how often new projects succeed and will not invent a rate; you have to estimate your own, and write it down before you start rather than after.

What building buys that buying cannot: everything is yours by construction. There is no inherited penalty, no undisclosed dependency, no earnings figure you have to take on someone else's word — and you learn the business as you make it, which is its own asset.

Buying tends to win when

• The part that takes longest to build is the part being sold — aged search traffic, an established audience, accumulated reviews.
• You can verify the numbers independently, so the resolved uncertainty is real rather than asserted.
• You have more money than time, and the business runs on work you already know how to do.

Building tends to win when

• What you would be buying is mostly code or a design that you could reproduce quickly — the cost to rebuild caps what it is worth to you.
• The listing's earnings cannot be checked, which turns “resolved uncertainty” back into a claim.
• You want to learn the market, and the learning is part of what you are after.