Do RMDs Trigger the 3.8% NIIT? (w/Examples) + FAQs

This article reflects federal rules as of June 2026 and covers tax years 2025 and 2026. State rules are summarized generally. Tax law changes — confirm current figures with IRS.gov before you file.

Quick Answer

No — a required minimum distribution (RMD) is not itself net investment income, so the 3.8% Net Investment Income Tax never lands directly on the RMD. But for tax year 2025, the RMD raises your modified adjusted gross income (MAGI), and that bump can push your other investment income over the threshold and into the tax.

Why This Question Trips Up So Many Retirees

You pull money from a traditional IRA or 401(k) because the law forces you to, and suddenly your tax software flashes a new line: a 3.8% Net Investment Income Tax on Form 8960. It feels like the IRS just taxed your retirement withdrawal twice. The truth is more subtle, and understanding it can save you real money: the RMD did not get hit by the 3.8% tax, but it opened the door by lifting your income over a fixed line that has not moved in over a decade.

This matters now more than ever. The NIIT thresholds — $200,000 for single filers and $250,000 for married couples filing jointly — are not indexed for inflation, so each year more retirees with modest portfolios drift over the edge. The SECURE 2.0 Act pushed the RMD age to 73 (and 75 for those born in 1960 or later), which lets balances grow larger and produces bigger forced withdrawals later — exactly the kind of MAGI spike that triggers the surtax.

Here is what you will walk away knowing:

🔍 The exact mechanism — why RMDs indirectly trigger NIIT even though they are never “investment income”
🧮 A full worked example with real dollars showing how an RMD costs you 3.8% on your dividends
📋 How the RMD flows through Form 8960 line by line, and where it does not appear
🛡️ Six legal moves (QCDs, Roth conversions, timing) that keep your MAGI under the line
⚠️ The seven costly mistakes that turn a manageable RMD into a surtax surprise

The 3.8% NIIT, Decoded in Plain English

The Net Investment Income Tax is a 3.8% federal surtax created by the Affordable Care Act and in force since 2013. According to IRS Topic 559, it applies to individuals, estates, and trusts whose income climbs above a set threshold. People call it the “Medicare surtax” because the revenue helps fund Medicare, though you do not have to be on Medicare to owe it.

The tax is built on two numbers, and you pay 3.8% on whichever is smaller. The first number is your net investment income — things like taxable interest, dividends, capital gains, rental income, royalties, and income from passive businesses. The second number is the amount your MAGI exceeds your threshold. Because you are taxed on the lesser of the two, both pieces must be present: you need investment income and a MAGI over the line. Remove either one and the tax is zero.

The thresholds are fixed in statute and, per the 2025 Form 8960 instructions, do not change with inflation. For tax year 2025 they are $250,000 for married filing jointly or a qualifying surviving spouse, $200,000 for single or head of household, and $125,000 for married filing separately. These same figures carry into the 2026 filing season because the law never indexed them.

What Counts as Net Investment Income

Net investment income is income your money earns, not income your work earns. It includes taxable interest, ordinary and qualified dividends, capital gains from selling stocks or a second home, net rental and royalty income, and income from a business in which you do not materially participate. You subtract related expenses — such as investment interest and advisory fees allocable to that income — to get the “net” figure.

The consequence of misclassifying income here is real: if you wrongly treat a passive rental as active, you may understate your NIIT and face an IRS adjustment plus interest. A common misconception is that all of your income is investment income; in fact wages, Social Security, and retirement-account distributions are specifically excluded from the NII calculation. What you should do is keep a clean tally of your 1099-INT, 1099-DIV, and 1099-B totals each year so you know your NII before December.

What Does NOT Count — Including Your RMD

This is the heart of the question. Distributions from qualified retirement plans and IRAs — traditional IRA, 401(k), 403(b), SEP, SIMPLE, and the RMD itself — are expressly excluded from net investment income. So is Social Security, wage income, self-employment income, and tax-exempt municipal bond interest.

The catch — and the reason this article exists — is that an RMD still counts toward your MAGI, the gatekeeper number on the second half of the formula. So while the RMD dollars never sit in the “investment income” bucket, they swell the MAGI bucket that decides whether your other income gets taxed. Ignoring this distinction is why people wrongly believe their IRA withdrawal was directly surtaxed. The right move is to picture two separate buckets and watch the MAGI bucket carefully each year.

The Mechanism: How an RMD Indirectly Triggers NIIT

An RMD is taxed as ordinary income and lands on the front of your Form 1040, which raises your adjusted gross income and therefore your MAGI. Once your MAGI clears the threshold for your filing status, the 3.8% tax attaches to the lesser of your net investment income or your MAGI overage. The RMD is the lever, not the load: it lifts MAGI, and any investment income you already had becomes exposed.

Think of the threshold as a dam. Your wages, pension, and Social Security may already fill the reservoir partway. The RMD pours in more water, and the moment the water spills over the dam, the 3.8% tax catches whatever investment income is floating on top — up to the amount that spilled. If you had no investment income, nothing gets caught no matter how high the water rises; if you had no overage, the investment income stays dry.

This is why retirees with large IRAs and a healthy taxable brokerage account are most at risk. The forced withdrawal and the dividends or capital gains arrive in the same year, and one trips the other. A financial advisor at Jim Saulnier, CFP confirmed the point: the RMD is not subject to NIIT, “but if the RMD amount raises your MAGI above the applicable threshold, it will trigger NIIT on your net investment income.”

A Fully Worked Example (w/Real Dollars)

Meet Margaret, a single 74-year-old retiree, filing for tax year 2025. Her income before her RMD looks like this:

Pension and Social Security (taxable portion): $70,000
Taxable interest and dividends from her brokerage account: $40,000
Long-term capital gains from rebalancing: $20,000

Her net investment income is the interest, dividends, and gains: $40,000 + $20,000 = $60,000. Before any RMD, her MAGI is $70,000 + $60,000 = $130,000 — well under the $200,000 single threshold, so her NIIT is $0.

Now her IRA forces an RMD. Her IRA balance was $1,800,000 at the end of 2024, and at age 74 the IRS Uniform Lifetime Table divisor is 25.5, giving an RMD of about $70,588. Her new MAGI becomes $130,000 + $70,588 = $200,588.

Now run the NIIT formula. Her MAGI exceeds the $200,000 threshold by $588. Her net investment income is $60,000. The tax is 3.8% of the lesser number — the $588 overage. So she owes 3.8% × $588 = $22.34, rounded to $22.

Notice what happened. The RMD of $70,588 was taxed as ordinary income on its own. But it also pushed her $588 over the line, and that $588 of her investment income now gets the extra 3.8%. Push her MAGI higher — say a larger RMD or a big capital gain — and the overage grows until it reaches her full $60,000 of NII, capping her surtax at 3.8% × $60,000 = $2,280. The RMD never paid the 3.8% itself; it simply let the tax reach her dividends and gains.

Which Situation Applies to You?

The answer shifts based on who you are, so find your row before reading further.

You take RMDs from your own traditional IRA or 401(k) (age 73+). Your RMD raises MAGI; focus on the timing and QCD strategies below.
You inherited an IRA and fall under the 10-year rule. Your forced withdrawals may hit during your peak earning years, making NIIT far more likely — see the inherited-IRA section.
Your only income is the RMD, Social Security, and pension, with no taxable investments. You likely owe no NIIT at all, because there is no net investment income to tax.
You file married filing separately. Your threshold drops to $125,000, so the same RMD trips the tax much sooner.
You hold Roth IRAs or Roth 401(k)s. Roth accounts owe no RMDs to the original owner, and qualified Roth withdrawals do not raise MAGI — your safest source of spending.

Form 8960: Where the RMD Shows Up (and Where It Doesn’t)

Form 8960 is the one-page form where the 3.8% tax is calculated, and it has three parts. Part I gathers your investment income, Part II allows investment expenses, and Part III runs the threshold math. Understanding which line the RMD touches removes the confusion for good.

In Part I (lines 1–8), you list net investment income: interest on line 1, dividends on line 2, net gain on line 5a, and rents/royalties on line 4. Your RMD never appears here — it is not investment income, so it stays off the entire top of the form. This is the visual proof that the RMD is not directly surtaxed.

In Part III, line 13 asks for your MAGI. This is the only place the RMD matters, because the RMD already inflated the AGI that flows into MAGI. Line 14 is your threshold ($200,000, $250,000, or $125,000). Line 15 is the excess of MAGI over the threshold. Line 16 is your net investment income, and line 17 multiplies the smaller of line 15 or 16 by 3.8% to produce the tax, which carries to Schedule 2 of your Form 1040.

The consequence of fumbling line 13 is a wrong tax in both directions: forget to add an RMD-driven AGI item and you underpay (inviting IRS interest); double-count it and you overpay. The practical step is to let your software pull MAGI automatically, then sanity-check line 13 against your Form 1040 AGI. For help with the gains that feed line 5a, see a Schedule D and Form 8949 guide.

Three Common Scenarios

Scenario 1 — Modest investor, single filer, just over the line.

If your situation looks like this	Here is the NIIT result
Single, $150,000 base income, $30,000 NII, RMD of $60,000 lifts MAGI to $210,000	MAGI is $10,000 over $200,000; you owe 3.8% on the lesser of $10,000 and $30,000 = 3.8% × $10,000 = $380

Scenario 2 — Married couple, large IRA, big dividends.

If your situation looks like this	Here is the NIIT result
MFJ, $200,000 base income, $80,000 NII, RMD of $90,000 lifts MAGI to $290,000	MAGI is $40,000 over $250,000; you owe 3.8% on the lesser of $40,000 and $80,000 = 3.8% × $40,000 = $1,520

Scenario 3 — Retiree with no taxable investments.

If your situation looks like this	Here is the NIIT result
Single, $50,000 pension, $90,000 RMD, $0 investment income, MAGI of $140,000	NII is $0, so the tax is 3.8% × $0 = $0 — the RMD alone never triggers NIIT

Three Named Examples

David, the inherited-IRA heir. David, age 52, is a software director earning $230,000 who inherited his father’s $400,000 IRA in 2024. Under the 10-year rule with annual RMDs, he must take a distribution in 2025 because his father had already begun RMDs. With $25,000 of dividends and a six-figure salary, his MAGI is already over $250,000 even before the inherited RMD — so every dollar of his $25,000 NII gets the 3.8% tax, costing him $950. The inherited RMD made a bad NIIT year worse.

Susan and Tom, the surprised couple. Susan, 75, and Tom, 73, file jointly with $180,000 of pension and Social Security plus $60,000 of dividends, leaving MAGI at $240,000 — just under the $250,000 line. Their combined RMDs of $40,000 push MAGI to $280,000. Now $30,000 spills over, and they owe 3.8% × $30,000 = $1,140 they did not see coming.

Elena, who planned ahead. Elena, 68, converted part of her traditional IRA to a Roth in her early 60s before RMDs began. At 73 her remaining traditional IRA is small, her RMD is only $18,000, and her MAGI stays at $190,000 — under the single threshold. Her $45,000 of dividends escape the 3.8% tax entirely because she shrank the future RMD years earlier.

Six Strategies to Keep MAGI Under the Threshold

Because the RMD works through MAGI, every winning strategy lowers MAGI or removes the RMD from it. Each move below has a clear “why.”

Qualified Charitable Distributions (QCDs). Once you are 70½, you can send up to $108,000 (the inflation-adjusted 2025 limit) directly from your IRA to charity, and it counts toward your RMD without raising MAGI. This is the single best NIIT lever for charitable retirees because it satisfies the RMD and keeps MAGI down at the same time.
Roth conversions before RMD age. Converting traditional dollars to Roth in your 60s shrinks the future balance that drives RMDs, so later RMDs — and the MAGI they create — are smaller.
Spread conversions over multiple years. A giant one-year conversion can itself spike MAGI and trigger NIIT; smaller annual conversions keep each year under the line.
Harvest gains in low-income years. Realizing capital gains before RMDs start, when MAGI is lower, can avoid stacking gains on top of RMDs later.
Use Roth accounts for spending. Qualified Roth withdrawals do not count toward MAGI, so drawing living expenses from a Roth instead of a taxable sale keeps the dam below the spillway.
Time discretionary income. Delaying a Roth conversion or a property sale to a year when your RMD is smaller can keep MAGI under the threshold.

Mistakes to Avoid

Believing the RMD itself is surtaxed. It is not — but you may overpay if you list it as investment income on Form 8960, inflating your tax.
Forgetting the threshold never inflation-adjusts. Each year the same $200,000/$250,000 line catches more people; assuming it rises leads to an unplanned bill.
Missing the RMD entirely. A skipped RMD draws a 25% excise penalty (reducible to 10% if corrected within two years via Form 5329) — far worse than the NIIT.
Doing a huge Roth conversion in an RMD year. Stacking a conversion on top of the RMD can spike MAGI and trigger NIIT on all your investment income.
Overlooking the MFJ vs. MFS gap. Filing separately drops the threshold to $125,000, so the same RMD trips the tax far sooner; choose your status with the math in front of you.
Ignoring inherited-IRA RMDs. Heirs under the 10-year rule often face forced withdrawals during peak-earning years, the worst possible time for NIIT.
Assuming your state taxes the RMD like the feds. The NIIT is federal only, but the RMD is still ordinary income in most states — a separate cost you must plan for.

Federal vs. State: A Critical Split

The 3.8% NIIT is a federal tax with no state counterpart in nearly every state. The table below contrasts the two layers so you do not conflate them.

Federal treatment	State treatment
3.8% NIIT applies when MAGI exceeds $200,000/$250,000 and you have net investment income; RMD is excluded from NII but raises MAGI	Almost no state levies a NIIT equivalent; however most states tax the RMD itself as ordinary income, and a few (such as Pennsylvania) treat retirement income differently

The practical takeaway is to separate the questions. Ask first, “Does the federal NIIT reach my investment income this year?” Then ask, “Does my state tax this RMD as income?” — the answers are independent, and states like Illinois and Pennsylvania exempt much retirement income while no-income-tax states like Florida and Texas tax none of it.

Do’s and Don’ts

Do estimate your MAGI in November so a year-end QCD or Roth move can still help — why: most levers only work before December 31.
Do keep your RMD and investment income on separate worksheets — why: it prevents the overpayment that comes from mislabeling the RMD.
Do consider QCDs first if you are charitable — why: they satisfy the RMD and lower MAGI in one step.
Do check your filing status math — why: MFS halves your room to the threshold.
Do confirm your state’s treatment of the RMD — why: the federal answer does not tell you the state cost.
Don’t skip an RMD to dodge NIIT — why: the 25% penalty dwarfs a 3.8% surtax.
Don’t report the RMD on Form 8960 lines 1–8 — why: it is not investment income and will overstate your tax.
Don’t assume the threshold rises with inflation — why: it has been frozen since 2013.
Don’t convert your whole IRA in one year — why: the MAGI spike can trigger NIIT on everything.
Don’t rely on tax-exempt muni interest to dodge NIIT alone — why: it stays out of NII but other income may still push MAGI over.

Pros and Cons of Planning Around the RMD-NIIT Link

Pro — Lower lifetime tax. Pre-RMD Roth conversions can keep you under the threshold for years; why: smaller future RMDs mean a smaller MAGI.
Pro — Charitable efficiency. QCDs let you give and cut MAGI at once; why: the gift never enters your income.
Pro — Predictability. Knowing the fixed threshold lets you forecast the surtax precisely; why: the numbers do not move.
Pro — Flexibility from Roth. Roth withdrawals fund spending without raising MAGI; why: they are excluded from the calculation.
Pro — Early-year gain harvesting. Realizing gains before RMDs avoids stacking; why: lower MAGI years cost less.
Con — Conversion tax now. Roth conversions create taxable income today; why: you prepay tax to avoid later RMDs.
Con — Complexity. Coordinating RMDs, conversions, and gains takes planning; why: one mistimed move can backfire.
Con — QCD limits. QCDs cap at $108,000 for 2025 and require age 70½; why: not everyone qualifies or gives that much.
Con — Irreversibility. Roth conversions can no longer be undone; why: a bad-year conversion is locked in.
Con — State mismatch. A move that helps federally may not help your state bill; why: the two systems do not align.

What to Do Next

Pull your year-end IRA balances and estimate your 2026 RMD using the IRS Uniform Lifetime Table.
Add your projected RMD to your other income to estimate your MAGI, then compare it to your filing-status threshold.
Total your taxable interest, dividends, and gains to find your net investment income.
If MAGI will cross the line, schedule a QCD or trim a Roth conversion before December 31 — most levers expire at year-end.
Gather your 1099s and complete Form 8960 with your return; if you have an inherited IRA, multiple accounts, or income near the threshold, call a CPA or tax advisor — that help usually costs a few hundred dollars and can save far more.

This article is educational and not a substitute for advice from a licensed tax professional for your specific situation.

FAQs

Do RMDs count as net investment income for the NIIT?

No. RMDs from traditional IRAs and 401(k)s are excluded from net investment income, so they never face the 3.8% tax directly. They do raise your MAGI, which can expose your other investment income to the tax.

Can an RMD trigger the NIIT?

Yes — indirectly. The RMD raises your MAGI, and if MAGI crosses $200,000 (single) or $250,000 (MFJ) for 2025, the 3.8% tax applies to your investment income, capped at your MAGI overage.

What are the NIIT thresholds for 2025?

$200,000 single/head of household, $250,000 married filing jointly, $125,000 married filing separately. These are not indexed for inflation and remain the same for the 2026 filing season.

Is the NIIT threshold adjusted for inflation each year?

No. The thresholds have been frozen since the tax began in 2013, so more retirees cross them over time as incomes and RMDs grow.

Does a Roth IRA RMD trigger NIIT?

No. Roth IRAs require no RMDs for the original owner, and qualified Roth withdrawals do not raise MAGI, so they cannot trigger the tax.

Do inherited IRA distributions count toward NIIT?

No for the NII bucket, but yes they raise MAGI. Forced 10-year-rule withdrawals often hit during peak earning years, making the 3.8% tax more likely.

How much is the NIIT?

3.8%. You pay it on the lesser of your net investment income or the amount your MAGI exceeds your threshold for the tax year.

What form reports the NIIT?

Form 8960. It calculates the tax in three parts, and the result flows to Schedule 2 of your Form 1040. Your RMD affects only the MAGI line, not the investment-income lines.

Does my state charge a NIIT on my RMD?

Almost never. The NIIT is a federal tax with no state version in nearly all states, though most states still tax the RMD as ordinary income.

Can a Qualified Charitable Distribution reduce my NIIT?

Yes. A QCD satisfies your RMD without raising MAGI, for 2025 up to $108,000, which can keep you under the NIIT threshold and shield your investment income.

What happens if I skip my RMD to avoid NIIT?

A 25% penalty. Missing an RMD triggers an excise tax of 25% (reducible to 10% if corrected within two years via Form 5329) — far costlier than the 3.8% surtax.

Does Social Security count toward the NIIT?

No for net investment income, but the taxable portion adds to MAGI. So Social Security can help push you over the threshold even though it is never taxed at 3.8%.

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