1. Overweighting Pre-Tax Accounts

Many retirees have done an excellent job saving, but most of that money lives in pre-tax accounts like traditional IRAs and 401(k)s.

The challenge? Every dollar withdrawn is taxed as ordinary income.

This can:

• Push you into higher tax brackets
• Increase taxation on Social Security
• Trigger higher Medicare premiums

A lack of tax diversification often limits flexibility in retirement. Having a mix of Roth IRAs, Roth 401(k)s, strategic Roth conversions, and even Mega Backdoor Roth contributions (where applicable with your employer plans) can provide tax-free income in retirement and greater control over taxable income each year. Additionally, for those planning to retire before age 59½, maintaining access to a taxable brokerage account can be especially helpful, as it allows for penalty-free income before reitrement accounts become fully accessible.

2. Ignoring Medicare Timing and IRMAA

IRMAA (Income-Related Monthly Adjustment Amount) is a Medicare surcharge that increases Part B and Part D premiums when your income exceeds certain thresholds, based on your tax return from two years prior. Because Medicare premiums are income-based, not asset-based, even a single year of higher income from large IRA withdrawals, Roth conversions, or capital gains can trigger higher premiums, making IRMAA something that is often manageable with proactive, multi-year distribution planning.

Many retirees don’t realize:

• Medicare looks back at income from prior years
• One “good” tax year can create years of higher premiums
• Planning ahead can often reduce or smooth these costs

With thoughtful, multi-year planning, IRMAA doesn’t have to be a surprise or a penalty, it can often be anticipated, managed, and smoothed out as part of a coordinated retirement income strategy.

3. Not Planning for Survivor Income

Retirement planning isn’t just about today, it’s also about preparing for what happens if one spouse passes first. While couples often focus on their current income picture, the financial landscape can change quickly and dramatically after a loss.

Common oversights include:

• Loss of one Social Security benefit
• Reduction or loss of pension income
• Higher tax brackets for the surviving spouse

Without intentional survivor planning, income can drop while taxes rise, right when stability, clarity, and financial confidence matter most.

4. Waiting Too Long to Address Estate Planning

Estate planning is often postponed because it feels uncomfortable or “not urgent,” even though the consequences of waiting can be significant.

In reality:

• Beneficiary designations override wills
• Outdated documents can create family conflict
• Lack of clarity increases stress during already difficult times

A well-organized estate plan isn’t just about documents, it’s about reducing confusion, protecting relationships, and giving your family clarity and peace of mind when they need it most.

5. Assuming Markets Alone Will Solve Retirement

Markets play an important role, but they are only one piece of a successful retirement strategy.

Retirement requires:

• Coordinated withdrawal sequencing
• Income planning across multiple accounts
• Risk management aligned with spending needs
• A plan that works through both good markets and bad

Markets may drive returns but planning drives outcomes. True retirement confidence comes from knowing how your income holds up across changing markets, tax laws, and life events, not from performance alone.