18 Years’ Worth of Days The average retirement lasts for 18 years, with many lasting even longer. Will you fill your post-retirement days with purpose? Share | Related Content Retirement Redefined Around the country, attitudes about retirement are shifting. A Bucket Plan to Go with Your Bucket List Longer, healthier living can put greater stress on retirement assets; the bucket approach may be one answer. Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.