Is it a good idea to do a JD after a business undergrad degree and a post-graduate in finance with the goal of VC?

No, it's well down on the list of good uses of your time, if your interest is VC. You're looking at starting in an associate role. I actually think the best background for that is "industry", meaning, a background in the industries that the fund is investing in. For a tech fund -- experience in a software company for example. The skill set that's deployed is more like the management consultant's skill set, but that is easier to come by and/or learn.  Skill in finance and pure "business" is in third place to these. It has some value, but little marginal value. The finance side of things, like deal-making and such, is <10% of the work and is already something the partnership and financial controller of the fund already get. A law degree is less useful still. It probably adds something, but very marginal. You're never going to be called on to draft legal documents in VC.  There's no point. If you're the kind of person who opted to study business in school, and want to work in corp finance first, and are contemplating a JD, then I am guessing your preferences about work and lifestyle are a much better match for what we'd call "private equity" and not early-stage VC. Most everyone I know in tech VC came from tech itself, not finance and definitely not law. It's a different type than what you find in a PE house for sure.