Quote from Nana Trader:
I was talking about own business, and 15-20% net profit
after tax and all other expenses
You missed the point (that's OK, I try to hard not to "overstate" my points, so I tend to understate them). Yes, we are taking about a business, owned by the trader. Yes, we are deducting expenses. Yes we are talking fundamental accounting.
However, one also needs to include a wage for the workforce.
Imagine a one-man, pick-it-up restaurant. Only takes one person (pure theory here) to operate. He works 12 hours a day, 7 days a week. Let's say he put 100k into this operation, and "nets" (less expenses, but with no wages for himself) 20k/year. So that's 20%, pretty good, eh?
Not so fast. Our hero is putting in 4383 hours/year (12 hours x 365.25 days in a year). That's about $4.56/hour he was making, and
that includes his capital. If you figure he was worth $5 an hour (under minimum wage, I might add), his operation is operating
at a loss!.
And that's my point. That one needs to include a wage in one's business calculations.