Usually not, and it depends what you claim

For most people doing this work, the honest answer is no. Professional indemnity cover exists for the risk that somebody relies on your professional judgement, acts on it, and suffers a loss they can quantify - and a subjective assessment delivered as an opinion is a poor fit for every part of that sentence.

What changes the answer is not how much you earn. It is what you claim to be doing.

The line that moves the risk

An opinion about what something looks like is an opinion. A statement that something is normal, or fine, or a problem, is a conclusion about a person, and conclusions of that kind are what liability attaches to.

The distinction is not decorative and it is not only a legal one. Staying inside what you actually know is the same boundary approached from the craft side, and the two arrive at the same wording: describe what you see, never tell someone something about their body.

Three things push a listing across it. Language that implies assessment against a health standard rather than a preference. A claim of expertise or credentials you are not qualified to assert. A promised outcome rather than a promised deliverable - an assessment that will improve something, rather than one that will arrive by Thursday.

The last one also creates ordinary contractual exposure, which is a separate matter from insurance and is handled by a clear scope rather than a policy.

When cover becomes worth pricing

Four situations make it a real question rather than a theoretical one.

You hold personal material belonging to buyers, in volume, on your own systems. You have a genuine credential and are trading on it, which raises the standard you will be held to. You are contracting with businesses rather than individuals, where the counterparty may require cover before signing - contracts for larger jobs is where that requirement usually first appears. Or you have incorporated, at which point the questions change shape entirely and sole trader or company is the prior decision to have made.

Compulsory cover follows the same logic of attaching to specific relationships rather than to earning. In the UK, GOV.UK's guidance says you must get employers' liability insurance "as soon as you become an employer", for at least £5 million, which leaves an earner with no staff outside that rule.

Two cheaper things generally come first. A scope that promises a deliverable rather than a result, and a standing line in your listing that this is an opinion and not advice of any kind. That sentence costs nothing and does more work than most policies would.

What any of this actually requires, and whether a policy would respond at all in a sector many insurers decline outright, is a question for a broker in your country. It differs by jurisdiction, the underwriting is unusual here, and a general answer is worth very little. When an accountant is worth an hour makes the same argument about the adjacent question, and the reasoning transfers.

The reason buyers occasionally read an assessment as advice is that they arrive already used to numbers presented without any framing at all: what an automated score can honestly be held to sets the realistic bound, and Rate Cock's own explanation of what a score out of ten means is the page to have ready when someone asks a question your assessment cannot answer. Where genuine precision is being claimed, it comes with documented conditions rather than with a disclaimer, which is what the measurement side's method notes are. And on the commissioning side, expectations are set well before you: the buyer's account of what a review is for treats it as a considered opinion, which is exactly what you should be selling and exactly what keeps this question theoretical.