Every QS carries a contingency. Very few can show how it was arrived at when the client asks, which is exactly when it gets cut.
A five per cent contingency is a guess dressed as a policy. It survives right up until a client asks what it is for, and then it becomes a negotiation you cannot win.
Record each risk with what it would cost if it happened and how likely it is. The allowance is the expected value, and it changes as the job de-risks.
A risk register kept for the file is a cost. A risk register that produces a number the client sees every month is a tool, because it turns an argument at final account into a discussion in month three.
Print it for the client, or keep it internal. It never appears on a client guest link unless you decide it should.
It follows the same idea: identify the risk, quantify the cost, assess the likelihood, and carry the expected value as an allowance. It is a commercial register aimed at cost, not a health and safety or programme risk register.
Only if you choose. Guest links hide the risk register and the cost report by default, because a client who can read your contingency will always want to negotiate it. You can print it for them deliberately when that is the right conversation.
Close it. The allowance drops, the anticipated final cost improves, and the record shows the client that the number came down because the risk went away rather than because you were asked to cut it.
Every plan. Plans differ by how many surveyors you have, never by which features you can use.
Not your whole portfolio. One live job, one certificate. If it does not save you time the first time you use it, walk away and take your data with you.