The Vanguard Individual 401(k) lets self-employed workers contribute up to $70,000 in 2026 through a plan built entirely around Vanguard’s low-cost index funds. It is a solid choice if you are already a committed Vanguard investor — but it has two notable limitations: no Roth option and no loans. If either of those features matters to you, Fidelity or Schwab may be a better fit.
2026 Vanguard Individual 401(k) Contribution Limits
| Contribution Type | 2026 Limit |
|---|---|
| Employee deferral (pre-tax only) | $23,500 |
| Catch-up, age 50–59 or 64+ | $7,500 additional |
| Super catch-up, age 60–63 (SECURE 2.0) | $11,250 additional |
| Employer profit-sharing | Up to 25% of net SE income |
| Total annual additions | $70,000 |
| Total with regular catch-up | $77,500 |
| Total with super catch-up | $81,250 |
The $70,000 annual additions limit is set by IRS Section 415. Vanguard applies the same limit as all other solo 401(k) providers — the difference is in flexibility, investment options, and fees, not in contribution ceilings.
Employee vs. Employer Contributions at Vanguard
Employee deferral (up to $23,500): Unlike Fidelity and Schwab, Vanguard only offers traditional (pre-tax) employee deferrals — there is no Roth option. Your deferral reduces your taxable income today, and withdrawals in retirement are taxed as ordinary income.
Employer profit-sharing (up to 25% of net SE income): Calculated after deducting half of your self-employment tax. The practical effective rate is roughly 20% of gross self-employment income.
Worked Example: $100,000 Self-Employment Income
On $100,000 net SE income in 2026:
- SE tax deduction: ~$7,065
- Adjusted income: $92,935
- Employer contribution (25%): $23,234
- Employee deferral: $23,500
- Total 2026 contribution: $46,734
A SEP-IRA at Vanguard on the same income would cap at ~$20,000. The solo 401(k)’s employee deferral component adds more than $23,000 in additional tax-deferred space.
No Roth Option: The Key Limitation
Vanguard’s Individual 401(k) accepts only pre-tax contributions. Both employee deferrals and employer profit-sharing are traditional. If you want to make Roth contributions in a solo 401(k) format — paying tax now for tax-free growth — you will need to use Fidelity, Schwab, or E*TRADE instead.
If you already have a separate Roth IRA at Vanguard (up to $7,000 in 2026), you can combine a traditional solo 401(k) with Roth IRA contributions to achieve tax diversification in retirement.
No Loans: The Second Limitation
Vanguard does not permit participant loans from Individual 401(k) accounts. This is a firm policy difference from Fidelity, Schwab, and E*TRADE, which all allow loans up to 50% of the vested balance or $50,000. If access to emergency funds matters to you, consider a competing solo 401(k) provider.
Fees at Vanguard
Vanguard charges a $20 annual fee per Vanguard fund held in the Individual 401(k). This fee is waived once your total Vanguard assets reach $50,000. For investors holding just one or two funds — say, a total stock market fund and a total bond market fund — the annual cost is $0–$40 until you hit the waiver threshold.
There are no transaction fees on Vanguard mutual funds, and ETF trades execute commission-free.
What You Can Invest In
Vanguard’s solo 401(k) is limited to Vanguard mutual funds and ETFs:
- Vanguard Total Stock Market Index Fund (VTSAX/VTI) — 0.03% expense ratio
- Vanguard Total International Stock Index Fund (VTIAX/VXUS) — 0.07%
- Vanguard Total Bond Market Index Fund (VBTLX/BND) — 0.03%
- Vanguard Target Retirement funds — all-in-one age-based allocation
You cannot hold individual stocks, bonds, ETFs from other providers, or third-party mutual funds in this account. This is more restrictive than Fidelity or Schwab, which provide access to their full investment marketplace.
How to Open a Vanguard Individual 401(k)
- Confirm eligibility — Self-employment income required; no full-time non-spouse employees
- Establish by December 31, 2026 — Plan must be open by December 31 of the year you want to shelter income; you cannot open it retroactively
- Apply at vanguard.com — Search for “Individual 401(k)” under retirement accounts
- Complete the plan adoption agreement — Vanguard provides the documentation
- Fund and invest — Transfer money or roll over a prior employer 401(k)
Employee deferrals must be made by December 31, 2026. Employer profit-sharing can be funded through October 15, 2027 if you file a tax extension.
Form 5500-EZ Requirement
When your Vanguard Individual 401(k) exceeds $250,000, you must file IRS Form 5500-EZ annually by July 31 of the following year. Penalties for missing this filing are substantial — up to $250 per day.
Vanguard Solo 401(k) vs. Competitors
| Feature | Vanguard | Fidelity | Schwab |
|---|---|---|---|
| 2026 limit | $70,000 | $70,000 | $70,000 |
| Roth option | No | Yes | Yes |
| Loans | No | Yes | Yes |
| Annual fee | $20/fund (waived at $50K) | $0 | $0 |
| Investment options | Vanguard only | Full marketplace | Full marketplace |
| Best for | Vanguard-committed investors | Flexibility + Roth | Flexibility + Roth |
If you already have the bulk of your investments at Vanguard and value the Vanguard fund lineup above all else, the Vanguard Individual 401(k) is a sound choice. If you want Roth contributions or loan access, Fidelity or Schwab are better alternatives.
Related Vanguard Retirement Guides
- Vanguard SEP-IRA 2026 — Limits, Setup & Who Should Open One
- Vanguard Backdoor Roth IRA 2026 — Step-by-Step Guide
- Vanguard Traditional IRA 2026 — Deduction Rules & Limits
- Vanguard Roth IRA 2026 — Limits, Rules & How to Open
- Vanguard — Complete Investor Guide 2026
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