Impact of Taxes and Inflation Estimate the potential impact taxes and inflation can have on the purchasing power of an investment. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content 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? Extended Care: A Patchwork of Possibilities What is your plan for health care during retirement? Gap Insurance for Leased Cars If you’re thinking of leasing a new car, then you shouldn’t forget about gap insurance.