Does the NUA Election Make Sense For Your Illinois Retirement?

Net Unrealized Appreciation can turn a lifetime of company stock into long-term capital gains instead of ordinary income. It's a powerful move — and a permanent one. Here's how the tradeoffs play out for Illinois residents.

If you're retiring or leaving an employer where you've accumulated a meaningful stake of company stock inside your 401(k), you have a one-time decision to make that most people never hear about: the Net Unrealized Appreciation election. Used well, it can shift decades of stock growth out of ordinary-income territory and into the far gentler world of long-term capital gains. Used in the wrong situation, it can lock in an upfront tax bill, expose you to a concentrated single-stock risk, and forfeit benefits your heirs would otherwise enjoy.

For Illinois residents specifically, the math has some quirks that work both for and against you. This article walks through how NUA actually works, where it shines, where it bites, and the Illinois-specific wrinkles that can tip the decision either direction.

What the NUA Election Actually Is

Inside a 401(k), employer stock has two components: the cost basis (what the shares were worth when they went into your plan) and the net unrealized appreciation (everything the stock has gained since). Normally, when you eventually pull money out of a 401(k) or a rolled-over IRA, every dollar — basis and growth alike — is taxed as ordinary income.

The NUA election lets you do something different. When you take a qualifying lump-sum distribution, you move the actual shares of company stock into a regular taxable brokerage account. In exchange:

How the Tax Splits

Basis is taxed now; growth is taxed later, at capital-gains rates

You pay ordinary income tax on the cost basis in the year you make the move — that's the price of admission. But the appreciation (the NUA itself) is no longer treated as ordinary income. Instead, it's taxed as a long-term capital gain whenever you sell the shares, regardless of how long you've held them. Any growth after the move follows normal capital-gains holding rules.

That single shift — from ordinary rates that can reach into the mid-30s federally to long-term capital-gains rates of 0%, 15%, or 20% — is the entire reason NUA exists. To qualify, the distribution generally has to be a lump-sum distribution of your entire account balance within one tax year, triggered by separation from service, reaching age 59½, death, or disability.

Capital Gains Versus Ordinary Income

The heart of the NUA decision is a rate arbitrage. Roll everything into an IRA and you've converted your employer stock's growth into future ordinary income. Elect NUA and you've converted that same growth into capital-gain income. The bigger the spread between your ordinary rate and your capital-gains rate — and the larger the appreciation relative to the basis — the more compelling NUA becomes.

Crucially, the basis tax is due up front, in the year you make the election. If you have to sell shares or dip into outside cash to pay it, that's money no longer compounding for you. At long horizons, that opportunity cost matters — and it's one of the most commonly overlooked parts of the analysis.

Why This Looks Different In Illinois

Here's where Illinois residents get a genuinely interesting twist — and it cuts in a way that often surprises people.

Illinois State Tax

Illinois taxes capital gains. It does not tax retirement-account distributions.

Illinois has a flat individual income tax (currently 4.95%), and capital gains are taxed as ordinary income at that flat rate. But Illinois fully exempts qualified retirement income — including distributions from IRAs, 401(k)s, and pensions — from state income tax.

That means the NUA gain you'd realize in a taxable brokerage account gets hit with Illinois's 4.95% state tax when you sell. The very same dollars, left inside an IRA and withdrawn as ordinary distributions, would face 0% Illinois tax.

This is a real headwind for NUA in Illinois that you wouldn't feel in a no-income-tax state. The federal capital-gains advantage of NUA is partly offset at the state level, because rolling everything into an IRA shelters those future dollars from Illinois tax entirely. Whether NUA still comes out ahead depends on how large the federal rate spread is relative to that 4.95% state penalty — which is exactly the kind of thing that has to be calculated, not guessed.

NIIT Applies to Capital Gains — But Not to IRA Distributions

The 3.8% Net Investment Income Tax stacks on top of the same dollars. NUA gains are investment income, so they can be subject to NIIT once your modified AGI crosses the threshold ($200,000 single / $250,000 married filing jointly). IRA and 401(k) distributions, by contrast, are not investment income — they escape NIIT directly, though they can still push your other investment income over the line. For Illinois residents, NIIT compounds the same way the state tax does: it's a cost the capital-gains path can carry that the rollover path can sidestep.

The Traps That Catch People

The 10% early-distribution penalty before 59½

NUA is most commonly executed at separation from service. But if you take the distribution before age 59½ and don't meet a separate exception, the cost-basis portion that's taxed as ordinary income can also be hit with the 10% early-withdrawal penalty. (The separation-from-service-at-55 rule can help in some cases.) The appreciation itself isn't subject to the penalty, but the basis tax getting penalized on top can meaningfully erode the benefit for someone retiring early.

No step-up in basis at death

This is the one most people miss. With ordinary appreciated stock held in a taxable account, your heirs receive a step-up in cost basis at your death — the embedded gain is effectively wiped clean. NUA does not get that step-up. The net unrealized appreciation remains taxable to your heirs as a long-term capital gain (income in respect of a decedent). Only the growth that occurs after the NUA move steps up. If your plan is to hold the position for life and pass it on, that lost step-up can quietly cancel out much of the upfront benefit.

Concentration and What You Do Next

The tax analysis is only half the story. Electing NUA means moving a block of a single company's stock into a taxable account. If that's a large share of your net worth, you're carrying real concentration risk — the fortunes of one employer driving an outsized portion of your retirement.

And here's the behavioral trap: NUA only pays off if you actually let those gains be taxed at favorable rates. But there's a natural reluctance to sell — selling triggers the capital-gains tax you were trying to manage, so people hold, and the concentrated position lingers for years. Rolling into an IRA instead lets you sell and diversify freely, with no tax cost on each trade inside the account. The "right" answer depends as much on your willingness to manage a concentrated stock as it does on the rate math.

A Few More Moving Parts

The details that change the answer

Beyond the headline items, the real-world decision is shaped by how you fund the upfront basis tax (outside cash versus selling shares), required minimum distributions on the IRA side, the possibility of cherry-picking which low-basis lots to apply NUA to, Roth-conversion alternatives, IRMAA Medicare-premium surcharges that a large income year can trigger, and your full picture of other income. Each of these can swing the outcome by a meaningful margin.

So, is NUA right for you?

Honestly: it depends, and not in a hand-wavy way. It depends on numbers that are specific to you — your basis, your appreciation, your bracket, your age, your heirs, your appetite for holding concentrated stock, and the Illinois tax interplay above.

We've all seen the rules of thumb — "NUA wins when the stock has appreciated a lot." That's directionally true and practically useless, because the 10% penalty, the lost step-up, the 4.95% Illinois capital-gains tax, the 3.8% NIIT, and the opportunity cost of the upfront basis tax all pull in the other direction. The only way to know which force wins in your case is to run your actual figures through the full model — with every one of those factors switched on.

That's exactly what we built a tool to do, and it's exactly the kind of conversation we'd welcome. If you have appreciated employer stock and you're approaching a distribution decision, let's put your real numbers in and see what the answer is for you.