Self-employed Bitcoin investors can contribute up to $70,000 per year to a solo 401(k) — far beyond the standard IRA limit. This guide compares solo 401(k), SEP IRA, and SDIRA for Bitcoin retirement accounts.
Self-employed Bitcoin investors have a significant advantage over employees: access to retirement account structures that allow far higher annual contributions than standard IRAs. A solo 401(k) can shelter up to $70,000 per year in pre-tax contributions — more than 10x the standard IRA limit — and all of it can be invested in Bitcoin through the right custodian.
This guide covers the three main retirement vehicles for self-employed Bitcoin holders, how they compare, and which one makes sense for your situation.
Standard IRA contribution limits are modest: $7,000 per year in 2026 ($8,000 if over 50). These limits apply regardless of income.
Self-employed individuals can access employer-plan structures where the contribution limits are dramatically higher because you are both the employee and the employer:
For a Bitcoin holder who is serious about tax-advantaged accumulation, the solo 401(k) or SEP IRA can accelerate wealth building dramatically compared to a standard IRA.
A solo 401(k) — also called an individual 401(k) or self-employed 401(k) — is a qualified retirement plan for self-employed individuals with no full-time employees other than a spouse.
2026 contribution limits:
On a $100,000 net self-employment income, you could shelter $23,500 as an employee deferral plus $25,000 as an employer contribution — $48,500 total.
Standard solo 401(k) providers (Fidelity, Vanguard) do not allow Bitcoin. To hold Bitcoin in a solo 401(k), you need a self-directed solo 401(k).
Options for Bitcoin solo 401(k):
iTrustCapital: Offers a self-directed solo 401(k) with Bitcoin investment options. Transparent fee structure.
Bitcoin IRA (the company): Offers solo 401(k) alongside their IRA products.
Rocket Dollar: A self-directed retirement account platform that supports solo 401(k) with checkbook control — you direct investments from a linked LLC.
DIY with a plan document: Some investors create solo 401(k) plans with custom plan documents that explicitly allow alternative investments. This requires a third-party plan administrator.
Solo 401(k) plans can designate employee contributions as Roth (after-tax). The $23,500 employee deferral can be Roth, meaning those dollars grow tax-free. Combined with a tax-deductible employer contribution, this allows a hybrid pre-tax/after-tax structure.
For Bitcoin holders who expect significant appreciation, Roth 401(k) contributions provide tax-free growth on the portion with the highest expected returns.
A Simplified Employee Pension IRA allows contributions of up to 25% of net self-employment income, maximum $69,000 in 2026. SEP IRAs are significantly simpler to set up and administer than solo 401(k) plans.
Key characteristics:
Contribution comparison:
On $80,000 net self-employment income:
The solo 401(k) wins on contribution amount, especially at lower income levels where the employee deferral component makes a significant difference.
SEP IRAs are self-directed IRAs (SDIRAs) by nature. You can hold Bitcoin in a SEP IRA through the same specialized custodians as a standard SDIRA:
A standard Self-Directed IRA (traditional or Roth) with a specialized custodian is the most common structure for Bitcoin in retirement accounts. Contribution limits are low ($7,000/$8,000), but the structure is well-understood and widely available.
Best for:
| Scenario | Best Choice |
|---|---|
| High income, maximize contributions | Solo 401(k) |
| Want Roth option | Roth solo 401(k) or Roth IRA |
| Simple administration | SEP IRA |
| Starting out, low income | Roth SDIRA |
| Have employees | SEP IRA (solo 401k not available) |
| Income under $30K/year | Standard IRA (contribution limits not binding) |
Existing traditional IRA or previous employer 401(k) balances can often be rolled into a self-directed solo 401(k) or SDIRA without tax. This allows converting existing retirement savings into Bitcoin-holding accounts.
Rollover steps:
Can I contribute to both a SEP IRA and a solo 401(k) in the same year? No. You cannot have both a SEP IRA and a solo 401(k) for the same business. However, you can have a solo 401(k) for one self-employment activity and a SEP IRA for a separate business.
What counts as self-employment income for contribution purposes? Net self-employment earnings after deducting self-employment tax (the employer portion). Use Schedule SE calculations. Include income from freelancing, consulting, sole proprietorship, LLC member income, and partnership income where you materially participate.
Is there a deadline to set up a solo 401(k)? The plan must be established by December 31 of the tax year for which you want to make contributions. This is stricter than SEP IRAs, which can be set up until the tax filing deadline including extensions.
Can I take a loan from my Bitcoin solo 401(k)? Solo 401(k) plans can allow participant loans — up to $50,000 or 50% of the vested account balance, whichever is less. This is a feature not available with IRAs. Check whether your plan document includes loan provisions.
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