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Retirement readiness by age: How do you stack up?

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Retirement readiness by age

Whether you're just starting your career or getting ready to leave the workforce for good, retirement can present a challenge.

Across workers of all age ranges, 58 percent say they plan to work past age 65—if they retire at all, according to a new survey of 4,550 workers for the Transamerica Center for Retirement Studies. Workers who are in their 60s or older are the least optimistic about ever retiring, but even among 20-something workers, 43 percent don't anticipate clocking out before 65.

Read MoreNearly a third of savers have less than $1,000 for retirement

"It's never too soon or too late to start saving, investing, preparing and planning for retirement," said Catherine Collinson, president of the Transamerica Institute and Transamerica Center for Retirement Studies. "Each age range has unique opportunities."

Here's howand how muchworkers in their 20s, 30s, 40s, 50s and 60s should be saving for retirement, and how much they are actually setting aside. See how you stack up.

—By CNBC's Kelli B. Grant
Posted May 5, 2015

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