Here's the single biggest thing a buyer is paying for: a business that doesn't need you in it every day.
If you are the key relationships, the key decisions, and the knowledge that lives in nobody else's head, then what you're selling isn't really a business - it's a job with your name on it. And it gets priced like one. Readiness, more than anything, is how much you've built a team and a set of systems that outlast your daily involvement.
A buyer will ask all of these. Better to have your answers ready than to be figuring them out across the table:
The business owners who wait for a buyer to show up tend to keep far less of what they built. That's not bad luck - it's leverage. When you're not ready and an offer appears, you negotiate from weakness.
The business owners who treat readiness as a multi-year project - closing the gaps deliberately, on their own timeline - are the ones holding the leverage when it counts. Readiness isn't a checklist you run the month before a sale. It's the quiet work of the years before it.
Just as important as knowing what makes a business ready is knowing what quietly drags the price down. Heavy dependence on the owner is the biggest one - if the relationships, the decisions, and the knowledge all live with you, a buyer sees risk, not value. Customer concentration is another: if one or two clients make up a large share of revenue, a buyer worries what happens if they leave. Messy or inconsistent financials, deferred maintenance, key employees with no reason to stay, and a lack of documented systems all chip away at the number.
The encouraging part is that most of these are fixable with time - which is the whole argument for starting early. An owner who spends two or three years reducing their own indispensability, cleaning up the books, diversifying the customer base, and documenting how the business runs is not just making the company easier to sell. They are directly increasing what it sells for.