Probably something along these lines: http://www.mrmoneymustache.com/2012/01/13/the-shockingly-simple-math-behind-early-retirement/ http://www.mrmoneymustache.

Probably something along these lines: http://www.mrmoneymustache.com/2012/01/13/the-shockingly-simple-math-behind-early-retirement/ http://www.mrmoneymustache.com/2012/01/13/the-shockingly-sim... have a play with "networthify" calculator. E.g. hold expenses to 25k / year or less, have income net of tax of 70k and put the surplus into investments that give around 4-5% return after inflation. Repeat for 10 years then retire. keep expenses low in retirement. Luck also helps: this probably assumes you and your family aren't struck by serious medical problems that wipe out savings.