LaSheila

“Whatever your age, whatever your income, how much should you be worth right now? From years of surveying various high-income/ high-net worth people, we have developed several multivariate-based wealth equations. A simple rule of thumb, however, is more than adequate in computing one’s expected net worth. Multiply your age times your realized pretax annual household income from all sources except inheritances. Divide by ten. This, less any inherited wealth, is what your net worth should be. For example, if Mr. Anthony O. Duncan is forty-one years old, makes $143,000 a year, and has investments that return another $12,000, he would multiply $155,000 by forty-one. That equals $6,355,000. Dividing by ten, his net worth should be $635,500.”
― Thomas J. Stanley, The Millionaire Next Door: The Surprising Secrets of America's Wealthy

“What is “the relationship between realized income and wealth”? (SOI Bulletin, Department of the Treasury, Internal Revenue Service, vol. 2, no. 4, Spring 1985) What does he find? That people accumulate significant wealth by minimizing their realized/taxable income and maximizing their unrealized/nontaxable income.”
― Thomas J. Stanley, The Millionaire Next Door: The Surprising Secrets of America's Wealthy