A “good” retirement nest egg is highly personalized and directly tied to your desired annual retirement income. A common guideline, based on the 4% withdrawal rule, is that your total savings should be roughly 25 times your initial annual withdrawal amount. For example, if you aim for a $100,000 annual retirement income (above and beyond Social Security or other sources), a “good” nest egg would be around $2.5 million. Ultimately, a good nest egg is one that, combined with your other sources of income, gives you a high degree of confidence that your funds will last throughout your life while supporting the quality of life you’ve envisioned.