The habits that undo a retirement plan rarely look reckless — they look disciplined.
Susan Marsh is 63 and has saved $1.2 million. She's always considered herself frugal — clips coupons, waits for the sale, pays every bill on time. So when she sat down with Kevin Lum to build her retirement plan, the $38,000 credit card balance and six-year home equity loan came as a surprise. Susan hadn't thought of that balance as debt — just payments.
That distinction is why some of the most damaging retirement habits are easy to miss — they look like discipline, not recklessness. In his video 5 Money Habits that Feel Responsible — And Quietly Destroy Your Retirement, Kevin walks through the patterns he sees most often, including Susan's, along with the numbers behind each habit and the fix.
The Five Habits That Quietly Undo a Retirement Plan
None of these are about being careless — most are a routine that made sense for years and quietly stopped working.
1. Carrying Debt Into Retirement
Outside of a reasonable mortgage, debt carried into retirement usually isn't a math problem. It's a spending problem wearing a disguise. Car loans, credit cards, and lingering home equity lines typically mean lifestyle has outrun income.
The math makes the cost concrete. At average credit card rates of 21–22%, Susan's $38,000 balance was costing roughly $8,200 a year in interest alone. Generating $8,200 a year at a sustainable withdrawal rate takes close to $200,000 — savings assigned to old spending instead of retirement.
The fix: build a payoff plan targeting the highest rates first, and identify why the debt exists — without that, it tends to get rebuilt within a few years.
Ask yourself: Is any of my debt actually a spending pattern I haven't named yet?
2. Holding Too Much Cash
This shows up constantly with diligent savers. One client, 64, came in with $2.1 million — $1 million sitting in a money market account earning around 3.5%. It felt safe, since the balance never goes down.
But safety is partly an illusion, since purchasing power is what actually matters. With the Fed's rate near 3.5–3.75% and inflation near 3.6%, idle cash earns close to zero in real terms, and likely negative after taxes. Over a decade, $1 million at 3.5% grows to $1.41 million, but prices rise by a third, so buying power barely moves — while the same million at a more typical 7% could grow to nearly $2 million.
Cash still needs a job, just not an unlimited one. A reasonable starting point is 24 months of essential expenses in cash equivalents, with a bit more in short-duration bonds. Everything beyond that should be invested deliberately, according to a plan — not parked out of habit or fear.
Ask yourself: Is my cash sitting there because it has a purpose, or because moving it feels uncomfortable?
3. Deferring Taxes on Autopilot
For decades the advice was consistent: max out the 401(k), take the deduction, let it grow. What often goes unsaid is that a deferred-tax account eventually shifts from an asset to a liability.
Consider someone who is 64 with $1.5 million in an IRA, growing untouched at 6% a year. By 75, when RMDs typically begin, the account has grown to roughly $2.85 million, and the first required withdrawal is about $15,000 regardless of need. The IRS divisor shrinks each year, so by 85 the withdrawal climbs to roughly $190,000 — pushing retirees into a higher bracket, triggering Medicare surcharges, and, if a spouse passes away, leaving the survivor taxed at a single filer's rate.
The fix is using the low-tax window between retirement and RMD age — roughly the early-to-mid sixties through 75 — for strategic withdrawals or Roth conversions. Kevin's retirement tax and Roth conversion playlist goes deeper on timing.
Ask yourself: Am I deferring taxes because it's the right strategy, or because it's simply the habit I've always followed?
4. Not Actually Knowing What Gets Spent
Ask most pre-retirees what they spend monthly and the answer comes quickly. Ask them to prove it with real statements, and the number is often a thousand dollars or more higher.
This matters because nearly every retirement decision rests on that one input. At a 4% withdrawal rate, every unaccounted $1,000 a month requires roughly $300,000 more in the portfolio — a common $1,500 underestimate can leave a plan nearly half a million short, with nothing having gone wrong in the market at all.
The fix: pull six to twelve months of actual statements — not memory, not an old budget — and total what genuinely left the account, including irregular costs like insurance, property tax, and repairs.
Ask yourself: Do I know my actual monthly spending, or my best guess at it?
5. Selling to Cash When the Market Drops
Related to holding too much cash, this habit can be the most expensive of the five — even though it feels, in the moment, like protection.
JP Morgan research on the S&P 500 from 2005–2024 found fully invested returns averaged 10.4% a year. Missing just the ten best days cut that to 6.1%. A $500,000 portfolio fully invested grows to roughly $3.5 million; missing those ten days out of nearly 5,000, it ends up closer to $1.6 million.
Good and bad days cluster together — seven of the ten best fell within two weeks of the ten worst. Selling during a downturn all but guarantees missing the rebound. The fix is deciding before the storm: a written plan for a 20% decline, made in a calm market, paired with an allocation that never forces stocks sold at a loss.
Ask yourself: If the market dropped 20% tomorrow, do I already know what I'd do — or would I be deciding in the moment?
Five Money Habits to Check Before Retirement
A quick self-assessment. Answer honestly — this is a self-check, not a test.
Watch the Full Breakdown
Kevin walks through each habit — including Susan's full story — in his video 5 Money Habits that Feel Responsible — And Quietly Destroy Your Retirement. His playlist on retirement taxes and Roth conversions goes deeper on Habit 3.
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