Most people don't sabotage their retirement with one dramatic mistake. It's usually smaller, repeated choices that add up over years, decisions that feel harmless in the moment but quietly compound into a smaller nest egg. Some of these habits are so common they barely register as choices at all, which is exactly why they're worth a second look.
The strange part is that many of these habits look responsible on the surface. Rolling with the crowd, keeping things simple, avoiding paperwork. Yet the data on how Americans actually save, borrow, and withdraw money tells a more complicated story.
1. Cashing out your 401(k) every time you switch jobs
1. Cashing out your 401(k) every time you switch jobs (investmentzen, Flickr, <a href="https://creativecommons.org/licenses/by/2.0/" target="_blank" rel="noopener">CC BY 2.0</a>)
Changing jobs is stressful enough without having to make a decision about an old retirement account, so a lot of people take the easy way out and just cash it in. This habit is especially common among hourly workers. According to Vanguard, the group of workers disproportionately affected by income instability is hourly-wage workers, and 42% of hourly workers cash out their 401(k) when they switch jobs.
The tax hit alone can be brutal. Cashing out is almost always a mistake unless you're in severe financial distress, since you'll pay ordinary income taxes on the entire amount plus a 10% early withdrawal penalty if you're under 59½, meaning a $50,000 cash-out could cost $20,000 or more in taxes and penalties. That's money that never gets the chance to compound again.
2. Taking 401(k) loans or hardship withdrawals more than once
2. Taking 401(k) loans or hardship withdrawals more than once (Image Credits: Pexels)
Borrowing against your own retirement account can feel like a victimless shortcut, especially when the alternative is high-interest credit card debt. But the risk shows up if you leave your job before the loan is repaid. If you're not able to repay the loan, your employer will treat the unpaid balance as a distribution, which is typically taxable and also subject to a 10% early withdrawal penalty, so ideally you want to leave your 401(k) alone until retirement.
This isn't a rare occurrence anymore either. There is a worrisome trend in 401(k) retirement plans regarding early withdrawals, with more people taking hardship withdrawals than in previous years for a few reasons. Part of the pressure comes from rising costs, and part comes from automatic enrollment pulling in savers who weren't planning to touch the account until it became a tempting pool of cash sitting right there in a moment of need.
3. Never bumping up your contribution rate
3. Never bumping up your contribution rate (401k Limits, Flickr, <a href="https://creativecommons.org/licenses/by-sa/2.0/" target="_blank" rel="noopener">CC BY-SA 2.0</a>)
Setting a contribution rate once and forgetting about it feels efficient, but income tends to rise over a career while the percentage going into the 401(k) often stays frozen in place. That gap matters more than people assume. Vanguard recommends a total contribution rate of 12% to 15% of income, combining employee and employer contributions, yet only 51% of Vanguard participants met that target or hit the statutory maximum in 2025, meaning roughly half are still below it.
The gap widens further up the income ladder in a way that shows how much this habit is tied to awareness rather than ability. Among workers earning $150,000 or more, 51% maxed out their contributions, while among those earning under $50,000, fewer than 1% did. A one percent bump each year, timed to a raise, barely changes a paycheck but changes the trajectory of a balance decades later.
4. Ignoring the fees quietly sitting inside your plan
4. Ignoring the fees quietly sitting inside your plan (Image Credits: Pexels)
Expense ratios are one of the least visible costs in personal finance, mostly because nobody sends a bill for them. They're simply subtracted before returns ever reach an account statement. A 1 percent difference in fees and expenses can reduce an account balance at retirement by 28 percent compared with lower-cost options, even with identical contributions over the same period.
Run that same math over a full career and the numbers get harder to ignore. The average investment expense of plan assets for smaller 401(k) plans is around 1.37%, and paying just 1% in fees could cost a saver more than $590,000 over 40 years of saving, using a 25-year-old contributing $10,000 annually with a 7% average return. Comparing fund options inside a plan takes maybe ten minutes, which is a strange trade for six figures over a lifetime.
5. Letting old 401(k) accounts pile up and get forgotten
5. Letting old 401(k) accounts pile up and get forgotten (Image Credits: Unsplash)
Every job change tends to leave a small retirement account behind, and after a decade or two, most people have lost track of at least one. This isn't a fringe problem either. Data from 22,000 retirement savers found that the median 50-to-59-year-old had three separate workplace retirement accounts, and 31% had four or more.
Scattered accounts make it nearly impossible to see the full picture, and forgotten ones sometimes get swept into default cash-out rules without the owner even noticing. People with four or five old 401(k) accounts often lose track of one, especially after moving or changing email addresses, and consolidation prevents this problem. Rolling everything into one IRA or a current employer's plan isn't glamorous work, but it turns a scattered mess into something that's actually manageable.
6. Claiming Social Security at 62 out of habit rather than a plan
6. Claiming Social Security at 62 out of habit rather than a plan (Image Credits: Unsplash)
Sixty two is the earliest age Social Security allows, and a meaningful share of retirees take it as soon as the door opens, often without running the numbers first. Over one-quarter of Social Security recipients begin collecting their payments at age 62, locking in a permanent reduction in their monthly checks, and in 2024, roughly 26% of the 3.25 million individuals who filed for benefits for the first time were 62 years old.
The reduction isn't temporary, and it follows a retiree for the rest of their life. Since retiring at 62 typically means a 30% reduction in monthly benefits, a worker who would have received $2,000 at full retirement age instead gets $1,400, and this reduction remains fixed for life, with annual inflation adjustments raising the check but never closing that gap. For someone who's healthy, has other income sources, and is the higher earner in a couple, waiting even a few years can change the math substantially, since a larger benefit also protects a surviving spouse, often making waiting until 70 the optimal strategy for the higher earner regardless of the individual break even analysis.
7. Withdrawing money in retirement without a steady plan
7. Withdrawing money in retirement without a steady plan (Image Credits: Pexels)
The habits that hurt retirement savings don't stop once someone actually retires. How money comes out of an account matters almost as much as how it went in. Of retirees who began withdrawing within five years of retiring, 19% took a withdrawal in only one year while 34% withdrew in all five years, yet among this consistent group just 20% withdrew a steady 3% to 10% annually, and large, irregular withdrawals, especially during market downturns, can undermine the long-term sustainability of retirement savings.
Some retirees skip the slow drawdown entirely and simply take everything out at once. A surprisingly large share of retirees, roughly 1 in 4, cash out the full balance of their retirement assets within one year of retiring, and while the typical retiree with assets in a 401(k) plan cashes out roughly $19,000, 24% of cash-outs are for balances of $50,000 or above. A steady, modest withdrawal rate isn't as exciting as a lump sum, but it's the version of the habit that actually keeps money working for as long as it's needed.
Most of these habits share a common thread: none of them feel like a mistake in the moment. They feel like convenience, like getting on with life instead of getting bogged down in account paperwork. The fix, in nearly every case, isn't dramatic either. It's a rollover form filled out instead of ignored, a contribution rate nudged up by a single percentage point, a claiming date that gets a second thought before the application goes in. Small corrections, repeated consistently, tend to matter more than any single big move.