Retirement Tax Planning FAQs: What Many Retirees Are Surprised to Learn

Retirement Tax Planning FAQs: What Many Retirees Are Surprised to Learn

January 07, 2026

Retirement is often expected to simplify finances and reduce taxes. For some households, that happens. For many others, taxes become more complex — and in some cases higher — as retirement progresses.

Below are answers to key questions many retirees ask once they begin reviewing how income and taxes evolve over time.

Do taxes really go up in retirement?

They can.

While earned income often disappears, other sources of taxable income take its place. Required Minimum Distributions (RMDs), increased taxation of Social Security, and higher Medicare premium surcharges (IRMAA) can all contribute to rising taxes later in retirement — even when spending remains stable.

Why would my taxable income increase if my lifestyle doesn’t change?

Because some income is mandated.

Once Required Minimum Distributions (RMDs) begin, the IRS requires withdrawals from traditional retirement accounts, whether the money is needed or not. Those withdrawals count as ordinary income and often grow over time as required percentages increase.

For a clear explanation of how RMD rules changed, see SECURE Act 2.0: An Overview — How Retirement Law Changed RMDs.

What are RMDs, in simple terms?

RMDs are required minimum annual withdrawals from traditional retirement accounts once you reach a certain age. The required amount is based on IRS life expectancy tables and increases each year.

Even retirees who reinvest these amounts must still report them as taxable income.

How do RMDs affect Medicare premiums?

Medicare premiums for Part B and Part D are based on income reported on tax returns from two years prior.

When taxable income exceeds certain thresholds, Medicare applies Income-Related Monthly Adjustment Amounts (IRMAA), which increases premiums. Because of the look-back system, these higher costs can feel unexpected.

Does this affect people who aren’t big spenders?

Yes.

This dynamic is driven by account balances and tax rules — not lifestyle. Many careful savers experience rising taxes simply because they accumulated substantial tax-deferred savings.

That’s why tax-efficient retirement planning often focuses on how income timing affects taxable income and health care costs. 

Is this only a concern for very large portfolios?

No.

Even mid-six-figure traditional retirement balances can generate RMDs large enough to push taxable income into higher brackets or trigger Medicare surcharges.

Can retirement taxes be reduced once RMDs start?

Options are more limited once RMDs must be taken. That’s why planning earlier — especially before RMDs begin — can matter.

Tools like long-term retirement income projections help reveal when income, taxes, and premiums may change over time and which actions can influence outcomes.

Is retirement tax planning about predicting future tax laws?

No.

Effective planning focuses on what you can control today:

  • When taxable income is recognized

  • How withdrawals from different account types interact

  • How Social Security and Medicare timing affect outcomes

  • How your overall mix of assets influences taxes

Though laws can change, these structural relationships still shape retirement results.

Do I need to act immediately if I’m concerned?

Not necessarily.

The right timing depends on your broader financial picture. The important step is understanding when key decisions matter and reviewing projections early enough to preserve flexibility.

What’s a good first step for retirees? 

A clear long-term projection of how income, taxes, and required withdrawals will evolve across retirement — not just in the next year — often brings clarity quickly.

The content is developed from sources believed to be providing accurate information. The information in this material is for educational purposes only and is not intended as tax, investment, or legal advice. It may not be used to avoid any federal tax penalties. Please consult legal, investment, or tax professionals for specific information regarding your situation. Mayfair Financial and FMG Suite developed and produced this material to provide information on a topic of interest. FMG is not affiliated with the named state-registered investment advisory firm. The opinions expressed and material provided are for general information and should not be considered a solicitation for the purchase or sale of any security.