Last week, I chose not to tell a client about their slightly worn serpentine belt. | Auto Mechanics - Freelance Forum - The Community for Independent Professionals
But is it really the right call if they don't even know the choice exists? You spotted a part that's wearing out, and that's a safety item that can leave them stranded. The customer being tight on money doesn't change that it was their information to have, not yours to decide for them.
Wait, are we talking about a cavity or a brake pad? Because PaulJackson's dentist example is about something that can be watched. A worn out safety part on a car isn't like a tiny cavity you check next visit. It's more like a tooth that's already cracked and could break any time you chew. The customer needs to know it could fail, even if they choose to wait.