Self-Directed IRA Rollover from 401(k): Real Estate, Private Equity, and Alternative Investments

A self-directed IRA lets you hold assets that standard brokerage IRAs don't: rental properties, private loans, startup equity, tax liens, and more. Rolling a 401(k) into an SDIRA follows the same mechanics as any IRA rollover — but the prohibited transaction rules under IRC § 4975 are strict, the penalties for violations are severe, and the costs are substantially higher than a standard rollover IRA. This guide covers what's allowed, what's prohibited, and when the tradeoffs make sense.

What is a self-directed IRA?

A self-directed IRA (SDIRA) is legally identical to a standard traditional or Roth IRA under IRC § 408. Same contribution limits ($7,500/year in 2026, or $8,600 if age 50+, per IRS Notice 2025-67¹), same tax treatment, same RMD rules. The distinction is operational: a self-directed custodian will hold alternative assets — real estate, private equity, private loans, tax liens — that standard IRA custodians (Fidelity, Vanguard, Schwab) don't accept.

The term "self-directed" is not an IRS designation. From the IRS's perspective, an SDIRA is just an IRA. That means IRC § 4975 prohibited transaction rules apply in full — and they apply to you personally as IRA owner, not just to the custodian. Violations can disqualify the entire IRA, triggering income taxes and penalties on the full balance in the year of the violation.

Rolling your 401(k) into an SDIRA: mechanics

The rollover process is identical to a standard 401(k)-to-IRA rollover under IRC § 402(c) — no special rules for self-directed accounts:

1. Open a self-directed IRA with an IRS-approved custodian that accepts the asset type you want (see custodian comparison below).
2. Request a direct rollover from your 401(k) plan administrator to the SDIRA custodian. Always direct — never take a check payable to yourself. See our direct vs. indirect rollover guide for why the indirect path triggers mandatory 20% withholding and a 60-day clock.
3. Funds arrive at the custodian. Until you direct an investment, the cash typically sits in a money market account inside the SDIRA.
4. Direct the investment. You instruct the custodian to purchase the alternative asset on behalf of the IRA. Title is held in the custodian's name FBO (for benefit of) your IRA — not in your personal name.

One pre-rollover check: if you're between ages 55–59½ and left your employer in the year you turned 55 or later, rolling your 401(k) to an IRA permanently forfeits the Rule of 55 penalty-free withdrawal exception. Evaluate that before moving.

What an SDIRA can invest in

What an SDIRA cannot invest in

Regardless of what any custodian will process, IRC § 408(m) prohibits certain investments inside any IRA:²

• Collectibles: Art, antiques, rugs, gems, most coins, stamps, alcoholic beverages, and other items in § 408(m)(2). Purchasing a collectible inside an IRA treats the purchase amount as a taxable distribution in the year of purchase. (Exception: certain IRS-approved precious metals under § 408(m)(3).)
• Life insurance contracts. No IRA may hold a life insurance policy.
• S-corporation stock. An IRA is not an eligible S-corp shareholder under IRC § 1361(b)(1)(B). Purchasing S-corp stock terminates the company's S-election — a trap that catches SDIRA investors who buy into small family businesses.

Prohibited transactions: the most important rules to understand

IRC § 4975 prohibits any transaction between an IRA and a "disqualified person." This is the rule that trips up most SDIRA investors.³

Who is a disqualified person?

• You (the IRA owner/fiduciary)
• Your spouse
• Your ancestors (parents, grandparents)
• Your lineal descendants (children, grandchildren) and their spouses
• Any entity (corporation, partnership, trust, estate) where you — or any person above — own 50% or more
• Any officer, director, or 10%+ owner of such an entity

Notice who is not a disqualified person: siblings, aunts/uncles, cousins, and unrelated third parties. Your SDIRA can generally transact with them.

What counts as a prohibited transaction?

• Selling, exchanging, or leasing property between the IRA and a disqualified person
• Lending money or extending credit between the IRA and a disqualified person
• Furnishing goods, services, or facilities between the IRA and a disqualified person
• Using IRA assets for your benefit or any disqualified person's benefit
• You receiving any fee or compensation from the IRA in your personal capacity

Penalty for prohibited transactions

The penalty structure under IRC § 4975 is severe:³

• 15% excise tax on the amount involved, per year it remains uncorrected
• 100% excise tax if not corrected within the "taxable period"
• Full IRA disqualification when the IRA owner is the disqualified party: the entire IRA balance is treated as distributed on January 1 of the year the prohibited transaction occurred — all of it becomes ordinary income, plus the 10% early withdrawal penalty if you're under 59½

A $400,000 SDIRA that is disqualified because you personally repaired the rental property becomes $400,000 of ordinary income in one tax year. At a 32% marginal rate plus 3.8% NIIT, that's roughly $143,000 in federal taxes alone — plus state tax and potentially the early withdrawal penalty. The prohibited transaction rules are not administrative technicalities. They are hard constraints.

UBIT: the tax that reaches inside your tax-exempt account

Retirement accounts are generally exempt from tax on investment income. But two scenarios trigger Unrelated Business Income Tax (UBIT) under IRC §§ 511–514, requiring the IRA to file Form 990-T and pay tax from inside the account.⁴

How UBIT is taxed: The IRA files Form 990-T and pays tax on UBTI above $1,000 at trust income tax rates — which reach 37% at approximately $16,000 of income in 2026⁵, compared to $640,600 for individual filers. The tax is paid from inside the IRA, reducing the account balance. Other income in the same IRA remains tax-deferred.

Leveraged real estate example: Your SDIRA buys a $300,000 rental property with a $100,000 non-recourse loan (33% LTV). Because 33% of the property is "debt-financed," 33% of net rental income is UBTI subject to UBIT. The remaining 67% is excluded passive rental income. If net rental income is $15,000/year, $5,000 is taxable inside the IRA at trust rates. Non-recourse loans — where the lender's only recourse is the property itself — are the only permissible form of IRA debt. A recourse loan that holds you personally liable is itself a prohibited transaction.

Checkbook control IRA LLC: faster execution, real risk

Processing each transaction through a custodian is slow (days to weeks) and costly ($50–$250 per transaction). SDIRA investors who want speed — especially for competitive real estate deals — use a checkbook control IRA LLC structure:

1. Your SDIRA custodian holds a single-member LLC interest as the IRA's primary asset.
2. The IRA is the sole member of the LLC. You serve as manager — not member.
3. The IRA funds the LLC with a capital contribution. The LLC maintains a dedicated bank account.
4. As manager, you have checkbook authority to wire funds and execute deals directly, without per-transaction custodian processing.

This structure is widely used by SDIRA custodians and tax attorneys. It does not exempt you from § 4975 — the self-dealing rules still apply in full through the LLC. Additional requirements:

• No commingling. The LLC's bank account holds only IRA funds. Ever depositing personal money is a prohibited transaction.
• Annual valuation required. The custodian requires an annual fair market value of the LLC interest for Form 5498 reporting. For a real estate LLC, this typically means a broker price opinion or appraisal.
• LLC operating costs paid from IRA funds. Repairs, taxes, insurance, management fees — all come from the IRA's LLC account, not your personal funds.

Checkbook control is a legitimate structure for real estate. It is a different arrangement from the "home storage gold IRA" schemes that courts have rejected — in those cases, the IRA owner took physical custody of metals, which the Tax Court ruled a prohibited transaction in McNulty v. Commissioner, T.C. Memo 2021-123. The checkbook IRA LLC for real estate works because the IRA genuinely owns the LLC, which genuinely owns the asset, and you as manager act as a fiduciary of the IRA without taking personal possession of IRA assets.

SDIRA custodian comparison (2026)

Not all self-directed custodians accept all asset types. Fees vary significantly from standard rollover IRAs:

Contrast with a standard Fidelity or Vanguard rollover IRA: $0/yr, $0 transaction fees, and fund expense ratios of 0.00–0.03%. Before rolling to an SDIRA, confirm that the expected return premium from your alternative investment strategy exceeds the custodian fee drag. A $500/yr custodian fee on a $100,000 SDIRA is a 0.50% annual headwind before the alternative investment has returned a dollar. See our rollover IRA custodian comparison for the standard rollover option costs.

Three real scenarios

Scenario A: Age 52, $380,000 401(k) — rolling to an SDIRA to buy a rental property outright

David has $380,000 in an old employer 401(k) and identifies a rental property for $240,000 cash — no leverage, no UBIT exposure. He rolls the full $380,000 to Equity Trust, directs the purchase (property titled in Equity Trust's name FBO David's IRA), and the IRA earns $18,000/year in gross rent. All rent deposits into the IRA's property management account. Property taxes, insurance, and repairs are paid from IRA funds — never from David's personal accounts. He uses a third-party property management company for repairs and maintenance (not a disqualified person). Net rental income accumulates tax-deferred. When he sells at 65 for a $340,000 gain, the entire gain rolls tax-deferred into IRA cash — no capital gains tax at the time of sale. The $140,000 remaining after the property purchase stays in low-cost index funds inside the same SDIRA. The constraint David lives with: he can never stay there, not for a single night, not even after retirement before he takes an IRA distribution of the property.

Scenario B: Age 48, $180,000 in an old 401(k) — private mortgage lending at 10%

Linda is a real estate professional. She rolls $180,000 to Directed IRA, then lends $120,000 as a first-lien private mortgage at 10% annual interest to a real estate investor purchasing a fix-and-flip — someone she knows professionally, not a disqualified person. The IRA earns $12,000/year in interest, tax-deferred. No UBIT — passive interest income is excluded from UBTI under IRC § 512(b)(1). The loan is documented with a promissory note and deed of trust held in the IRA's name. LTV is 65% ($185,000 property, $120,000 loan) — her cushion against borrower default. The $60,000 remainder stays in a money market inside the SDIRA as liquidity reserve. One risk she explicitly avoids: lending to any family member. She turns down a request from her brother-in-law to avoid the prohibited transaction trap.

Scenario C: Age 44, $600,000 401(k) — adding startup equity via a separate SDIRA sleeve

Michael works in tech and has co-investment access to pre-IPO startups through his network. He rolls $540,000 to a standard Vanguard IRA (index funds, low cost) and moves $60,000 to an Alto IRA for startup equity on AngelList. The $60,000 goes into five investments at $12,000 each over 18 months. Alto's fee on the $60,000 is approximately $600/yr (1% of alternative asset AUM). Michael understands the venture math: most will return zero; one exit might return 10–30x the investment; liquidity is 5–10 years out. The prohibited transaction trap he watches carefully: if he later joins a portfolio company as an employee or board member, his IRA's equity stake in that company may become a prohibited transaction (he becomes a fiduciary of an entity the IRA holds). He consults a tax attorney before accepting any board seat. His Vanguard IRA remains untouched — diversified, low-cost, no prohibited transaction exposure.

1. IRS: 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500 — 2026 IRA contribution limit: $7,500 under age 50, $8,600 age 50+ (IRS Notice 2025-67). Self-directed IRAs are subject to the same limits as standard IRAs under IRC § 408.
2. IRS: Retirement Plan Investments FAQs — IRC § 408(m) collectibles prohibition; life insurance restriction; S-corp stock ineligibility; IRC § 408(m)(3) precious metals exception; overview of what IRAs can and cannot hold.
3. IRS: Retirement Topics — Prohibited Transactions — IRC § 4975 prohibited transactions; disqualified persons defined; 15% initial excise tax + 100% if uncorrected; IRA disqualification consequences when the IRA owner is the disqualified party.
4. IRS: Instructions for Form 990-T — UBIT filing requirements for IRAs with $1,000+ of UBTI; trust tax rate structure; debt-financed income rules under IRC §§ 511–514; passive income exclusions under § 512(b).
5. SmartAsset: Trust Tax Rates and Exemptions for 2026 — 2026 trust income tax brackets; 37% rate applies at approximately $16,000 of retained taxable income, compared to $640,600 for individual top-rate filers. Trust brackets are significantly compressed relative to individual brackets.
6. Kitces: Self-Directed IRA Prohibited Transaction Rules (IRC § 4975) — In-depth analysis of disqualified person definitions, prohibited transaction categories, and how courts have applied the rules to common SDIRA scenarios including real estate and checkbook IRA structures.

Values and rules verified May 2026 against IRS.gov, law.cornell.edu, SmartAsset, and Kitces sources cited above.