Retirement Account Red Flags: 5 Costly Mistakes to Avoid

The first two episodes in this series cost you money. This one can cost you a decade of it. Buried in the fine print of your IRA and 401(k) is a handful of rules that, stepped on the wrong way, can vaporize years — sometimes decades — of careful tax-deferred savings in a single afternoon. The cruel irony: the people who step on them are almost always the ones trying hardest to do the right thing. In part three of the How to Pay More Than Your Fair Share mini-series, fee-only fiduciary and CPA Wayne Firebaugh walks the minefield: five retirement-account rules that detonate quietly, expensively, and almost always at a moment of transition. The five land mines: 1. The 401(k) loan that follows you out the door. Borrowing from your own 401(k) sounds harmless — even smart. You're paying yourself back, with interest. Here's what the brochure skips: if you leave that job for any reason with a loan still outstanding, the unpaid balance generally gets treated as a distribution. That balance becomes fully taxable income that year, and if you're under 59½ it gets hit with an additional 10% early distribution penalty right on top of the tax. Make it concrete: somebody with a $15,000 loan balance gets laid off in a rough quarter. In an instant that $15,000 becomes taxable income — in a middle bracket, plus the 10%, they could owe $4,000 to $5,000 in tax on money they borrowed from themselves and spent months ago. The layoff was the gut punch; the surprise tax bill arriving the following April is the land mine going off underneath them. And there's a quieter cost that bites even if you never leave: you repay that loan with after-tax dollars out of your paycheck, then pay income tax on that same money again decades later when you withdraw it. A piece of it gets taxed twice. The fix: treat a 401(k) loan as a genuine last resort, not a convenient ATM. And if you've already got one outstanding with a job change on the horizon, know this — the rules now generally give you until your tax filing deadline, not just 60 days, to repay or roll over that balance and dodge the whole mess. But you have to act inside that window. 2. The missed required minimum distribution. The one that costs the most, lying in wait for anybody who inherits a retirement account. In your 70s the government requires you to start pulling money out of traditional retirement accounts every year. Skip one or take too little and the penalty is an excise tax of 25% of the amount you failed to withdraw — down from 50% until recently, and it drops to 10% if you catch it and fix it promptly. But you have to catch it. Inherited accounts are where this turns vicious. Most people who inherit a retirement account today have to empty the entire thing within 10 years — and here's the kicker folks never hear: if the person you inherited from had already started taking their own required minimum distributions, you may also be required to take a withdrawal every single year along the way, on top of emptying it by the end of year 10. Miss any of those and the same excise tax comes for you. Wayne has sat across from grieving heirs who discovered years later they'd been racking up penalties on distributions nobody had ever told them to take. The fix: the moment you inherit any retirement account, before you do one single thing, find out exactly what the distribution rules are for your specific situation — they genuinely differ depending on whether you're a spouse or a child, how old you are, and exactly when the original owner passed away. This is not a google-it-yourself rule. This is a sit-down-with-a-professional-in-the-first-week rule. 3. The blown 60-day rollover. The one people step squarely on while trying to be responsible. When you move retirement money there are two roads. The right road is a direct trustee-to-trustee transfer: the money travels straight from one custodian to the other and never touches your hands. The dangerous road: they cut a check to you, and a 60-day clock starts ticking. You have exactly 60 days — calendar days, not business days — to get every dollar into another qualified retirement account. Miss that window by a single day and the entire amount becomes a taxable distribution, penalty and all. And there's a trap inside the trap. When a 401(k) pays money to you directly, they're legally required to withhold 20% for taxes right off the top. So you ask to move $100,000 and the check that lands in your mailbox is $80,000 — $20,000 went to withholding. To complete a full rollover and owe nothing, you have to come up with that missing $20,000 out of your own pocket and deposit the full $100,000 within 60 days. If you can't, the $20,000 the government is holding counts as a taxable distribution too. The fix is one sentence you memorize and carry for the rest of your life: always ask for a direct transfer, custodian to custodian. The boring road and the safe road are the same road. 4. The backdoor Roth surprise. Aimed squarely at higher earners. If you attempt the popular backdoor Roth maneuver while you still have a big traditional IRA sitting off to the side, and you assume the conversion comes through tax-free — here's the snag. When you convert money into a Roth, the IRS does not let you cherry-pick and convert only your after-tax dollars. It looks at all your traditional IRA money lumped together and makes you convert a proportional, blended slice: part pre-tax, part after-tax. So if the bulk of your IRA balance is pre-tax, the bulk of your supposedly tax-free conversion is suddenly very much taxable. People expect a $0 tax bill and walk out with a substantial one. It's like trying to pour the cream off the top of your coffee — you can see it sitting right there, but the rule says no, you have to take a sip of the whole cup, coffee and cream stirred together. The fix exists but takes planning and timing: sometimes it means rolling your existing pre-tax IRA into an employer 401(k) plan first, getting it out of the IRA bucket entirely, so the cup is empty before you ever do the conversion. This one works beautifully set up in the right order and backfires spectacularly when somebody freelances it off a blog post. Don't improvise this one. 5. Company stock rolled into an IRA. The one that costs six figures and hides in absolute plain sight. You retire with a big pile of employer stock inside your 401(k) — shares you bought on the cheap over the years that are now worth a small fortune — and you roll the entire account into an IRA, exactly the way every well-meaning so-called professional tells you to. Why is that a mistake? Because of a special, little-known rule called net unrealized appreciation. NUA lets you pull that company stock out of the plan and ultimately pay the lower long-term capital gains rate on all that growth, instead of ordinary income rates. But the very instant you roll those shares into a regular IRA, that opportunity is lost forever. Every dollar of that appreciation, which could have been taxed at gentle capital gains rates, will now come out as ordinary income for the rest of your life. Make it concrete: company stock now worth $400,000 that you accumulated for about $50,000 over a long career. Roll it into an IRA and someday you'll pay ordinary income tax rates on all $400,000 as you withdraw it. Handle it under the NUA rules instead and that $350,000 of growth gets capital gains treatment. Depending on your bracket, that's tens of thousands of dollars — sometimes far more — hanging on one decision in one meeting. The fix: if you have appreciated employer stock in your retirement plan, stop before you sign any rollover paperwork and get it analyzed by somebody who knows this rule cold. It's narrow, technical, and requires a proper lump-sum distribution and careful execution — but for the right person it's one of the largest tax savings anywhere in the code, and it gets destroyed routinely by the most common piece of retirement advice on the planet: oh, just roll it into an IRA. The single thread that ties all five together: every one of these land mines goes off at a transition — changing jobs, inheriting a retirement account, rolling money over, retiring. The dangerous moments are always the moments of change. So the rule writes itself: whenever retirement money is about to move, that is exactly the moment you slow way down and sweep the ground for tripwires. Free download — this episode's Fair Share Checklist is your tripwire map: the specific questions to ask at every retirement transition, so the land mines stay buried and harmless. Linked below. If you're changing jobs, retiring, or you've just inherited a retirement account, please let somebody look before the money moves — because after one of these goes off, there's almost never anything anyone can do to put it back together. The link for a free 15-minute consultation is in the show notes. Next time: we flip the whole series on its head. Instead of mistakes that cost you money, we go hunting for opportunities you've been leaving on the table — the perfectly legal tax breaks you're allowed to take in full, and year after year probably aren't. Wayne Firebaugh Inc. is a fee-only firm registered as an investment advisor in Virginia and does not sell commissioned products. Everything in this episode is general education, not personalized advice. Pay your fair share — and not one dollar of tip. Choose wisely.