Most retirement plans begin the same way:
Save consistently into a 401(k) or IRA. Build the foundation. Let time do the work.
And for many people, that works beautifully.
But at some point, retirement planning shifts. The question stops being “How much have I saved?” and starts becoming “How is this structured?”
Because structure determines flexibility, and flexibility determines efficiency.
If most of your retirement savings sit in tax-deferred accounts, every dollar withdrawn in retirement is taxed as ordinary income. Those withdrawals stack on top of Social Security, pensions, and other income, potentially pushing you into higher brackets, increasing Medicare premiums, and exposing more of your Social Security to taxation. This is especially common once required minimum distributions (RMDs) begin in your 70s.
Here’s a simple example.
Imagine a 40-year-old with $500,000 saved who continues investing $20,000 per year and earns a long-term average return of 7%. By age 65, that portfolio could grow to roughly $4 million.
If all of it remains in tax-deferred accounts like an IRA or 401(k), a 4% withdrawal would generate about $160,000 per year in taxable income. At a 25% effective rate, that’s roughly $40,000 annually in taxes.
Now imagine the same saver, with the same $4 million, but structured differently. Over time, they diversified their contributions and executed strategic Roth conversions, ending up with $2.5 million tax-deferred and $1.5 million in Roth accounts.
Their withdrawals are still $160,000 per year, but not all of it is taxable. If their effective rate falls closer to 20%, annual taxes might be $32,000 instead of $40,000.
That’s an $8,000 difference per year.
Over a 30-year retirement, that’s nearly a quarter of a million dollars.
Not from higher returns.
Not from saving more.
From structure.
If most of your savings are concentrated in one type of account, it may be worth reviewing how your retirement plan is built, and whether it gives you the flexibility you’ll want later.