If your income is $100k and you save $90k, spending $10k, after 3 years, you will have saved $270k. With growth, you might have $300k. To support your ongoing $

If your income is $100k and you save $90k, spending $10k, after 3 years, you will have saved $270k. With growth, you might have $300k. To support your ongoing $10k annual expenses, you'd only be spending 3% of your portfolio. The math checks out. Of course with taxes, a savings rate of 90% is more than likely to be possible.