How to Hold Crypto in a Solo 401k

Tax-advantaged Bitcoin and crypto, and how to choose how the plan holds it.

Crypto, Tax-Advantaged

For U.S. tax purposes, digital assets are property, not currency[1], and a self-directed Solo 401k can hold them alongside real estate or private companies. Inside a traditional Solo 401k, gains aren't taxed until you take money out. Inside a Roth Solo 401k, a qualified distribution isn't taxed at all[2].

As with any alternative investment, the free brokerage plans won't hold crypto. You need a self-directed provider, and the right one depends on how you want the plan to hold the coins.

Two Ways to Hold Crypto

An exchange account in the plan's name

Some plans hold crypto through an exchange account opened in the plan's name, if the exchange accepts one. You don't manage keys yourself, but the exchange holds the assets for the plan, so its security and terms matter.

Rocket Dollar's Gemini partnership is available to its Solo 401(k)/Trust accounts as well as its IRA/LLC accounts, and Rocket Dollar describes Gemini as “a cryptocurrency exchange and custodian”[4].

Self-custody

The plan holds its own private keys, for example in a hardware wallet. You get full control and take on full responsibility for securing the keys.

Best if “not your keys, not your coins” matters to you. Rocket Dollar's Solo 401(k) page describes crypto as “hold your own keys, tax-advantaged”[3].

Which Providers Support Crypto?

Rocket Dollar lists cryptocurrency among the investments its Solo 401k supports, with the promise to “hold your own keys, tax-advantaged”[3], and its Gemini partnership is available to Solo 401(k)/Trust accounts[4]. As of December 2021, per Rocket Dollar, it could not support a Coinbase account[5]. Nabers Group lists Bitcoin, other crypto-assets and DeFi tokens, and builds checkbook control into its plan so you act as your own custodian[6].

Nabers Group's page doesn't name an exchange or describe how the plan should hold its keys, so ask it how it handles both before you open an account. Then compare the two on fees, support and the other assets you want to hold.

Remember: A Solo 401k can’t sell, lease, lend to, buy services from or otherwise deal with a disqualified person: you as trustee, your business, and your spouse, ancestors, lineal descendants and their spouses, among others. A disqualified person who takes part owes an excise tax of 15% of the amount involved for each year, rising to 100% if the transaction isn’t corrected.[7][8] The plan must own the crypto: keep it out of your personal wallets and exchange accounts. See our alternative investments guide for the full rules.

Frequently Asked Questions

Can a Solo 401k own Bitcoin or other cryptocurrency?

Yes, if the plan is self-directed. For U.S. tax purposes digital assets are property, not currency. Gains aren’t taxed until you take money out of a traditional Solo 401k, and a qualified distribution from a Roth Solo 401k isn’t taxed at all.

What is the difference between exchange and cold-storage crypto in a 401k?

With an exchange account opened in the plan’s name, the exchange holds the coins for the plan and you don’t manage keys. With cold storage (self-custody), the plan holds its own private keys, for example in a hardware wallet: you get full control and full responsibility for securing them. Either way the plan, not you, must own the crypto.

Does Rocket Dollar support Coinbase?

Not as of December 2021, per Rocket Dollar: its help center says it “cannot support a Coinbase account as of December 8th, 2021.” Ask Rocket Dollar whether that has changed. Its Gemini partnership is available to Solo 401(k)/Trust accounts, and its Solo 401(k) page supports crypto where you hold your own keys.

Should I hold crypto in a Roth or Traditional Solo 401k?

If you expect large gains, a Roth Solo 401k means a qualified distribution, gains included, isn’t taxed. The trade-off is paying tax on contributions now. See our Roth vs Traditional guide to weigh the decision.

Compare Self-Directed Solo 401k Providers

See how crypto-friendly providers stack up on cost, custody, and features.

Compare Solo 401k Providers

Sources

  1. Digital assets — Internal Revenue Service. Verified November 3, 2026.
  2. 26 U.S.C. §402A. Optional treatment of elective deferrals as Roth contributions — Office of the Law Revision Counsel, via GovInfo. Verified November 3, 2026.
  3. Solo 401(k) — Rocket Dollar. Verified November 3, 2026.
  4. Self-Directed Crypto Investing with Gemini — Rocket Dollar. Verified November 3, 2026.
  5. Can I use Coinbase with my Rocket Dollar IRA or Solo 401(k)? — Rocket Dollar. Verified November 3, 2026.
  6. Solo 401K Plans by Nabers Group — Nabers Group. Verified November 3, 2026.
  7. 26 U.S.C. §4975. Tax on prohibited transactions — Office of the Law Revision Counsel, via GovInfo. Verified November 3, 2026.
  8. Retirement plan investments FAQs — Internal Revenue Service. Verified November 3, 2026.