By Colleen Weber, CFP®, CPA

Building wealth takes years of discipline, but losing it can happen in a fraction of the time through silent, often invisible financial drains. While market downturns get all the headlines, the most significant erosion of wealth often comes from poor tax planning, inefficient asset management, and missed opportunities.

Affluent professionals and retirees are particularly vulnerable to these stealth taxes. By failing to optimize the “how” and “when” of financial decisions, it is easy to send hundreds of thousands of dollars to the IRS unnecessarily. Prioritizing tax efficiency is the key to stopping these avoidable leaks. Here are seven of the most common ways wealth is drained.

RSU Timing Mistakes

Restricted stock units (RSUs) are a fantastic tool for compensation, but they are taxed heavily as ordinary income upon vesting. A common mistake is allowing RSUs to vest, and then holding them without a strategy. If the stock price drops, you are left with a loss, but you still owe taxes based on the value at the time of vesting. Furthermore, concentrating too much in one stock—particularly your employer’s—introduces significant “single-company” risk.

• The Fix: Develop a vesting schedule strategy. Many professionals choose to sell all or a portion of their RSUs immediately upon vesting to diversify into a balanced diversified portfolio, avoiding both concentration risk and the heartache of watching tax-laden shares plummet. Work with both your wealth advisor and tax professional to develop the optimal strategy based upon your objectives and tax situation.

Inefficient Charitable Giving

While giving to charity is noble, giving cash (or selling appreciated stocks within a taxable brokerage account to donate the cash) is often inefficient. If you hold securities that have appreciated in value for more than one year, donating those securities directly allows you to deduct the full fair market value while avoiding the capital gains tax you would have paid if you sold them. In addition, for high-income donors, you might avoid the 3.8% tax on investment income that might apply if you sold the stock. Starting in 2026, there are also new rules on charitable giving that need to be followed to fully utilize tax benefits.

• The Fix: A better strategy may be to use a donor-advised fund (DAF) to “bunch” several years of charitable contributions into one year, allowing you to itemize deductions if you otherwise wouldn’t. For retirees over 70½, direct QCDs from IRAs are the most tax-efficient method. Distributions from DAFs are discretionary; they can be made now or in the future. 

Not Using Asset Location Strategies

“Asset location” is not about what you hold but where you hold it. Many high-income investors make the mistake of holding tax-inefficient assets—such as taxable bonds or high-turnover mutual funds—in regular brokerage accounts, while holding tax-efficient stocks in IRAs. Improper asset location may cause a “tax drag,” where annual dividends and interest are taxed at high ordinary income rates.

• The Fix: Place tax-inefficient investments (bonds) and other high-income investments in tax-deferred accounts (401k/IRA) and tax-efficient investments (index funds, ETFs) in taxable accounts. This simple shift may boost annual after-tax returns appreciably over time, merely due to the lower taxes incurred year to year.

Lack of Roth Conversion Planning

Failing to convert traditional IRA funds to a Roth IRA, especially during lower-income years or before RMDs begin, is a massive missed opportunity. Without this, your retirement account will continue to grow, leading to massive RMDs later in life that are taxed as ordinary income, often at higher rates. 

In addition, if the IRA account value is large enough, you may be leaving your heirs with tax headaches later, as their window to withdraw from the inherited IRA and pay the taxes on the distributions is only 10 years. Leaving your loved ones Roth IRAs to inherit may be much more tax-efficient for the family as a whole.

• The Fix: Perform a series of partial Roth conversions over several years to “fill up” lower tax brackets, rather than one massive, tax-trapping conversion. This creates a tax-free bucket of money for retirement and reduces future RMD burdens. Annual Roth conversion strategies may be most effective for those who retire early, before Social Security income benefits are claimed. Running hypothetical simulations with your wealth and tax advisors is recommended to determine the most effective timing for your own situation.

Medicare IRMAA Surcharges

Many retirees are caught off guard by the Income-Related Monthly Adjustment Amount (IRMAA). This is a “stealth tax” that triggers higher Medicare Part B and Part D premiums when your modified adjusted gross income (MAGI) exceeds certain thresholds. Because IRMAA relies on a two-year “look-back” (e.g., your 2024 income affects 2026 premiums), a one-time income spike (e.g., selling a business, a large bonus, or a big Roth conversion) can trigger massive penalties.

• The Fix: Work with your wealth advisor to “smooth” your income in the years before and during Medicare eligibility. This involves carefully planning when to realize capital gains or take retirement account distributions to avoid crossing the “cliff” thresholds.

RMD Mismanagement

Once you turn 73 (or 75, depending on when you were born), the IRS requires you to take required minimum distributions (RMDs) from traditional IRAs (and 401(k)/403(b) accounts if you still have retirement savings in these). Missing a deadline results in a harsh 25% penalty on the amount not withdrawn (down to 10% if corrected promptly). Beyond the penalty, improperly planned RMDs can push you into higher tax brackets and trigger the aforementioned IRMAA surcharges.

• The Fix: Schedule automated RMDs early in the year, rather than waiting until December, to ensure compliance. If you don’t need the income, consider a qualified charitable distribution (QCD) to satisfy your RMD while reducing your taxable income (see below).

Missed Step-Up Basis Opportunities

When you inherit assets like stocks or real estate, they receive a “step-up in basis” to their fair market value at the date of the original owner’s death. This means the decades of appreciation up to the date of the owner’s death are entirely tax-free. A common, costly mistake is selling assets prior to death or, conversely, gifting highly appreciated assets to heirs, since the cost basis of the gifted asset is retained in the ownership transfer, saddling the recipient with the inherent taxes on the appreciation.

• The Fix: For aging individuals, holding on to highly appreciated assets until death is often better than selling them, as the tax benefit to heirs outweighs the immediate cash-flow needs. This includes the family home, if possible.

Shielding Your Legacy from Stealth Taxes

Wealth isn’t usually lost in one big crash, but eroded by a “thousand small cuts” in the unoptimized decisions that drain progress over time. Stealth taxes are the subtle, easily missed costs that leak hard-earned money to the IRS. Without a focus on tax efficiency, it is easy to end up working harder just to keep less. However, by being proactive and plugging those leaks now, it is possible to keep that money working for a family’s future instead of the tax authorities.

As both a CPA and a CFP®, I’m here to help you navigate these complexities. You’ve worked too hard to let your retirement be diminished by inefficient planning, and I’m dedicated to helping you build a strategy that shields your wealth and gives you the confidence to live the life you’ve planned. Reach out today to book a free introductory meeting online or call (952) 470-0750.

About Colleen

Colleen Weber, CFP®, CPA, is a fee-only financial advisor and CPA based in Chanhassen, Minnesota, with over 20 years of experience in comprehensive wealth management. She specializes in tax-efficient financial planning and investment strategies for retirees, busy professionals, and women seeking to pursue their long-term goals.