There's been a few polls about whether people will finance part or most of the Model S purchase, but, depending on your point of view, money is cheap to borrow these days, so that might not be a true indicator of the relative wealth of the individual buying the Model S, or, more specifically from my perspective, how significant is the purchase relative to an individual's situation. This poll still doesn't cover all aspects (for those retired, or with large savings perhaps), but I think it might be an interesting indicator, and as it's just %'s (and anonymous), doesn't reveal any personal information about salary. So, this poll is asking what % of your annual gross income (salary, dividends, bonuses etc) does your Model S purchase represent? To try to keep it simple, I think if this will be your only car in the household, then the income should be the household income. If it's your own car, and your other half has their own, then it should be based on just your income. The cost of the car should be the total at the bottom of the invoice, including any relevant sales taxes, excluding any tax rebates (since they do not benefit you immediately) Does this make sense? Is it logical?? I hope so !? For example, if your annual gross income is $100k, and you are buying a 60Kw with a few options at $75k (incl sales tax, exlc. any tax rebates), then the answer would be 71-85%. If your income is $250k and you're buying a fully-loaded P85 at $105k, then the answer is 41-55% (100/250 *100).