It’s one of the most widely accepted benchmarks in retirement planning: You’ll need just 70% to 80% of your pre-retirement income to maintain the same standard of living when you leave work behind. This rule of thumb can be traced to the replacement-ratio studies done for 20 years by Aon Consulting and Georgia State University. The idea is that since you’ll no longer have to plow money into 401(k)s and other accounts and your expenses and taxes are likely to drop, you’ll be able to live well on less.
