If you’re retired or approaching retirement, you might assume that taxes are about to get simpler. No more W-2. No more paycheck withholdings to worry about. Just a nice, easy retirement without the tax headaches of your working years.

I hate to break it to you, but that’s often not the case.

The truth is retirement taxes are usually more complicated than they were during your working years, not less. That’s due to the likelihood of having several income sources, all of which may be taxed differently.

But if you understand how the pieces fit together, you can pay significantly less tax than the retiree who’s just winging it.

We’ll walk you through the major sources of retirement income, how each is taxed, and where the planning opportunities exist.

A Fundamental Shift: From One Income to Many

During your working years, most people had one main source of taxable income. Taxes were withheld automatically from your paychek.

At the end of the year, you filed a return, got a refund or wrote a modest check, and moved on.

Retirement is different for most.

Instead of one income source, you might have five, six, or more:

Social Security
Pension income
IRA distributions
401(k) distributions
Roth distributions
Brokerage account income (dividends, interest, capital gains)
Part-time work
Rental income
Annuity payments

Each of these is taxed differently. Some allow automatic withholding. Some don’t. Several can trigger penalties or surcharges if you’re not careful. Some interact with each other in ways that surprise most retirees.

Two problems consistently show up:

Problem #1: Retirees write checks to the IRS they didn’t have to write. Improper withholding leaves them with big tax bills at filing time, sometimes with underpayment penalties on top.

Problem #2: Retirees pay more in tax than they need to. Mostly because they didn’t understand the planning opportunities that exist.

By going through the different sources of income, you may be able to better understand if this applies to you, and hopefully may be able to save on tax with the opportunities ahead.

Source #1: Ordinary Income

Let’s start with the most familiar category. Ordinary income is what most working people are used to. It’s how W-2 wages (and earned income in general) are taxed, and it’s how several retirement income sources are taxed as well.

What counts as ordinary income in retirement:

Earned income from part-time work. If you continue working after retirement, even part-time, that income is still ordinary income. You may be in a lower bracket than during your peak earning years, but it’s still taxed at ordinary rates.

Pre-tax pension income. If you’re fortunate enough to have a defined benefit pension, the monthly payments from that pension are typically taxed as ordinary income (assuming pre-tax contributions).

Pre-tax IRA and 401(k) withdrawals. Any dollars you take from traditional IRAs, traditional 401(k)s, or any other pre-tax retirement account are taxed as ordinary income. These are dollars that received a tax deduction when contributed and grew tax-deferred. You deferred paying tax until retirement, and now the IRS wants its share.

For all three of these sources, you can typically elect to have taxes withheld directly. This is one of the simplest ways to avoid the “surprise tax bill at filing time” problem. Set up appropriate withholding upfront and you’ll rarely have to write a large check to the IRS.

Ordinary income tax brackets in retirement:

The federal brackets are the same as they were during your working years. But for many retirees, ordinary income drops significantly in retirement. This can put you in a lower bracket than you were in during your working years, which opens up planning opportunities we’ll get to in a moment.

Source #2: Social Security

Social Security taxation is where things start to get complicated.

The confusing part isn’t the rate – Social Security that IS taxable gets taxed as ordinary income at your regular bracket. The confusing part is figuring out how much of your Social Security is taxable in the first place.

The amount ranges from 0% to 85% of your benefit, depending on something called provisional income.

Provisional income calculation:

Provisional income = Your AGI (excluding Social Security) + Nontaxable interest + Half of your Social Security benefits

Based on your provisional income:

Below $25,000 single / $32,000 married: 0% of Social Security is taxable
$25,000-$34,000 single / $32,000-$44,000 married: Up to 50% is taxable
Above $34,000 single / $44,000 married: Up to 85% is taxable

These thresholds haven’t been adjusted for inflation since 1983. That means as time passes, more retirees get pushed into the 85% taxable range simply because of inflation, not because they’re actually earning more in real terms.

Why this matters for planning:

Every dollar of additional income you take from other sources such as IRA withdrawals, capital gains, and part-time work, can push more of your Social Security into the taxable column. This is often called the Social Security tax torpedo.

For example, taking an extra $10,000 from your IRA might not just add $10,000 to your taxable income. It might also push an additional $10,000 of Social Security into taxable territory. Suddenly that $10,000 withdrawal is creating $20,000 of taxable income.

Understanding this interaction is critical to good retirement tax planning.

Source #3: Non-Qualified Brokerage Accounts (Taxable Investments)

If you’ve saved money in a taxable brokerage account, you’re dealing with a completely different tax structure.

Since these accounts were funded with after-tax dollars, withdrawing the money you contributed itself isn’t taxable (this is known as cost basis). But the growth is taxable in a few different ways.

Capital Gains:

When you sell an investment for more than you paid, the gain is taxable. The rate depends on how long you hold it.

Short-term capital gains (held one year or less) are taxed at your ordinary income rate. This is the same rate as your other ordinary income and it receives no preferential treatment.

Long-term capital gains (held more than one year) are taxed at preferential rates that are usually significantly lower than ordinary income rates.

The long-term capital gains brackets are dramatically more favorable:

0% rate: Up to about $49,450 taxable income (single) / $98,700 (married)
15% rate: $49,451 to $545,000 for single, $98,901 to $613,700 for married
20% rate: Over these thresholds

For many retirees, long-term capital gains can be taxed at 0% at the federal level. This is one of the most powerful planning opportunities in retirement.

Dividends:

Qualified dividends get the same preferential treatment as long-term capital gains (0%, 15%, or 20%). Non-qualified dividends are taxed as ordinary income.

Interest:

Interest income is taxed as ordinary income – same brackets as your regular income.

The complexity:

Your long-term capital gains and ordinary income are calculated on the same tax return but taxed differently. They stack on top of each other. Your ordinary income fills up the ordinary income brackets first, then your capital gains stack on top.

This means capital gains can push you into higher tax brackets for OTHER purposes – like Social Security taxation, IRMAA thresholds, and the Net Investment Income Tax we’ll discuss next.

Source #4: IRMAA – The Hidden Medicare “Tax”

IRMAA stands for Income-Related Monthly Adjustment Amount. It’s not technically a tax – it’s a surcharge on your Medicare Part B and Part D premiums for higher-income retirees.

But most retirees experience it as a tax, because that’s effectively what it functions as.

How it works:

If your Modified Adjusted Gross Income (MAGI) exceeds certain thresholds, you pay higher Medicare premiums.

Two things make IRMAA particularly painful:

1. It’s a cliff schedule. If you go one dollar over a threshold, your entire premium jumps to the next tier for the whole year. This is different from marginal tax brackets, where only the dollars ABOVE the threshold get taxed at the higher rate. With IRMAA, cross the line by $1 and you pay the full higher premium.

2. It’s two years forward-looking. The IRMAA determination for 2026 premiums uses your 2024 tax return. So the withdrawals you take today affect your Medicare premiums two years from now. Many retirees are shocked to discover their Medicare premiums jumped in 2026 because of income they earned in 2024.

Where planning helps:

Because IRMAA is a cliff, staying just below a threshold can save you thousands of dollars per year in Medicare premiums. Careful planning around Roth conversions, capital gains, and IRA withdrawals can help you stay under important thresholds.

There are also waivers available if you experience a “life-changing event” (like moving from working to retired). If your income drops significantly, you can file for an IRMAA reconsideration and potentially avoid the surcharge entirely.

Source #5: Net Investment Income Tax (NIIT)

The Net Investment Income Tax is a 3.8% additional tax that applies to certain investment income for higher earners.

How it works:

NIIT applies to the LESSER of:

Your net investment income (interest, dividends, capital gains, rental income, non-qualified annuity gains, passive income), OR
The amount your MAGI exceeds $200,000 (single) or $250,000 (married filing jointly)

Whichever is lesser gets taxed at 3.8%.

It may not matter now, but it may eventually:

The $200,000 and $250,000 thresholds were established in 2013 and have not been adjusted for inflation.

That means what was a “high-income” threshold in 2013 is now closer to a “middle-income” threshold in today’s dollars. And with no indexing planned, this problem gets worse every year.

Many retirees who don’t consider themselves wealthy are getting caught by NIIT purely because of bracket creep from inflation.

Effective top rates:

For high-income retirees, NIIT stacks on top of regular capital gains tax. So while the headline long-term capital gains rate might be 20%, the effective rate becomes 23.8% when NIIT applies.

Source #6: State Taxes

This is where the story sometimes gets better for retirees and where it varies enormously by location.

Every state has different rules for retirement income. Some states are favorable:

Pennsylvania, for example, doesn’t tax:

IRA withdrawals (qualified)
Pension income (qualified)
Social Security

Pennsylvania has a flat 3.07% tax on earned income and capital gains, but retirement income sources are largely exempt.

Other states have income taxes but exempt Social Security. Others exempt some pension income. Some states have no income tax at all (Florida, Texas, Tennessee, and others).

And some states tax retirement income the same as any other income.

If you’re planning to relocate in retirement, understanding how your current state and your future state tax retirement income can be worth thousands of dollars per year. This is one of the few tax planning decisions where geography matters as much as strategy.

The Real Planning Opportunities

Now that we’ve covered the major taxable income sources, let’s talk about where the actual planning happens.

Opportunity #1: Withhold from the right sources.

You can elect to have federal (and often state) taxes withheld from Social Security, pensions, and IRA distributions. Setting up appropriate withholding upfront prevents the “surprise check to the IRS” problem and avoids underpayment penalties. Work with a CPA or advisor to calibrate the amounts.

Opportunity #2: Take advantage of low-income years.

Many retirees have a gap between when they retire and when they start Social Security or Required Minimum Distributions. During these years, their income might be dramatically lower than it will be later.

These years are golden opportunities for:

Roth conversions at lower tax brackets
Capital gains harvesting in the 0% bracket
Setting up future tax-efficient income

The retiree who lets these years pass without strategic planning often ends up paying more tax over their lifetime than necessary.

Opportunity #3: Manage IRMAA thresholds carefully.

Because IRMAA is a cliff, staying just below a threshold can save you thousands. If a large IRA withdrawal or capital gain would push you over an IRMAA threshold, breaking it into smaller pieces across multiple years might keep you below the line entirely.

Opportunity #4: Understand the Social Security tax torpedo.

If you’re not already at 85% Social Security taxation, know that additional income can push more of your benefit into the taxable column. Understanding this dynamic can influence when and how much to withdraw from other sources.

Opportunity #5: Coordinate ordinary income and capital gains.

Since these two are taxed differently but interact on the same return, careful sequencing can matter enormously. Realizing capital gains in a year with low ordinary income might qualify them for the 0% rate. Waiting a year could push them into the 15% or 20% bracket.

Opportunity #6: Know your state’s rules – and plan accordingly.

If you’re in a tax-friendly state for retirement income, take advantage of it. If you’re considering relocating, factor the tax implications into your decision.

The Team You Need

For most retirees, managing all of this on your own is difficult. There’s simply too much to track, too many interactions, and too many opportunities to miss.

Two professionals are typically valuable:

A CPA for preparation. A good CPA handles the current year’s return, catches errors, and makes sure everything is filed correctly. This is looking backward at the year that just happened.

A financial planner for strategy. A good financial planner looks forward. They help you figure out which accounts to withdraw from, when to do Roth conversions, how to time capital gains, whether you’re approaching an IRMAA threshold, and how to minimize your lifetime tax bill, not just this year’s.

The two roles complement each other. Preparation is looking backward. Planning is looking forward. Both matter.

The Bottom Line

Retirement taxes are often more complex than your working years. But that complexity creates opportunity.

The retiree who understands their income sources, knows the interactions, and plans strategically can pay significantly less tax than the retiree who’s just letting things happen.

Lower taxes in retirement happen on purpose.

The IRS isn’t going to send you a letter reminding you about these opportunities. Your CPA will help with filing what happened last year, but they may not proactively plan for what’s coming.

The retirees who pay the least tax over their lifetime are the ones who took retirement tax planning seriously, either by learning it themselves or by working with someone who knows how the pieces fit together.

If you’d like help building a retirement tax strategy that looks not just at this year but at your entire retirement, we can help. At Hyperion Financial, we help our clients coordinate withdrawals, Roth conversions, capital gains timing, and IRMAA planning to minimize their lifetime tax bill. Click here to schedule a conversation.