The Retirement Account More Self-Employed Americans Are Opening This Year

As of 2026, more than 30 million Americans are self-employed in some form — freelance, gig, consultant, or LLC owner. Most still default to a standard IRA, which caps contributions at around $7,000/year.

There are two better options for anyone with self-employment income: the Solo 401(k) and the SEP IRA. Both let self-employed savers put away ten times the standard IRA limit when used right.

A Solo 401(k) is a 401(k) for a one-person business. The owner contributes as employee (up to $23,000 in 2026, plus around $7,500 catch-up for 50+) and as employer (up to 25% of net self-employment income). The combined limit reaches around $66,000 (around $73,500 with catch-up).

Vanguard Solo 401(k) is the most-opened option for self-employed savers in 2026. Low fees, broad index fund selection, and easy contribution scheduling.

A SEP IRA lets self-employed savers contribute up to 25% of net self-employment income or around $66,000, whichever is lower. There is no employee/employer split — it is one bucket.

SEP IRAs are simpler to administer than Solo 401(k)s. No annual filing (Form 5500-EZ) when over around $250,000 in assets. Contributions can be made up to the tax-filing deadline plus extensions.

For higher contributors with modest revenue, Solo 401(k) wins. The dual employee+employer structure lets a around $50,000-revenue freelancer contribute up to ~around $30,000 — far more than a SEP IRA's 25% cap would allow at that revenue.

For simplicity and high revenue, SEP IRA can be the right choice. A consultant making around $300,000 contributes 25% = around $66,000 either way; the SEP is just less paperwork.

Solo 401(k)s typically offer a Roth contribution option. Income tax is paid up front; withdrawals in retirement are tax-no-cost. Best for owners expecting higher income/taxes in retirement than today.

Vanguard added Roth Solo 401(k) contributions in 2022. Most savers split — pre-tax for the employer match-equivalent, Roth for the employee deferral.

Solo 401(k) employee contributions must be elected by year-end. Employer contributions and SEP IRA contributions can be made up to the tax-filing deadline plus extensions — typically October of the following year.

This makes the SEP IRA the more forgiving of the two for last-minute planning. Solo 401(k) requires a year-end decision; SEP IRA leaves the door open for almost a year after.

Vanguard offers a curated set of low-cost index funds inside both account types. Total Stock Market, Total International Stock, Total Bond Market, and target-date funds are the most-used options for self-employed savers who want a hands-off setup.

Expense ratios on the index funds range from 0.03% to 0.07%. A around $66,000 contribution invested in a 0.05% fund costs around $33/year in fees — essentially no-cost at that scale.

Both Solo 401(k) and SEP IRA can be opened online with a Vanguard account in under an hour. The forms ask for the LLC or sole-prop name, EIN, and projected income. No notary or attorney needed.

Banks and brokerages process the application within a few business days. The first contribution can be made the same week.

Both accounts require self-employment income — gig, freelance, LLC, or sole-prop. W-2 income alone is not eligible. A small amount of side income (a few thousand dollars) is enough to open the account; the contribution scales with income.

A common path: open the account in year one with a small contribution, scale up in year two as the side hustle grows. The account is open and earning for the entire growth period.

A Solo 401(k) can include a spouse who works in the business. The spouse contributes their own employee deferral and earns their own employer contribution — effectively doubling the household contribution ceiling.

This works best when the spouse earns documented compensation from the business. Pure equity ownership without a salary does not qualify.

A Solo 401(k) can offer a loan provision — up to $50,000 or 50% of the balance, whichever is lower. The loan is paid back to the owner's own account with interest. The provision must be elected at plan setup.

SEP IRAs do not allow loans. This is one of the practical reasons higher-revenue self-employed savers prefer the Solo 401(k) — flexibility on access.

Traditional (pre-tax) contributions reduce the current year's adjusted gross income. A around $30,000 contribution at a 32% marginal tax rate saves around $9,600 in taxes. The savings compound when reinvested in the account.

Roth contributions do not reduce current taxes. The trade is paying tax now, paying nothing in retirement. The math is close to neutral for most savers; the choice depends on expected future tax rates.

Total market index funds dominate for hands-off investors. Three-fund portfolios (US stocks, international stocks, bonds) cover the bases for most savers. Target-date funds are the simpler one-decision option.

Vanguard's target-date funds shift allocation automatically toward bonds as the target retirement year approaches. Most self-employed savers use a target-date fund as the default and add a small tilt only if they have a specific view.

A Solo 401(k) with over around $250,000 in assets requires an annual Form 5500-EZ. Vanguard sends the data; the owner files. Below the threshold, no filing is required.

SEP IRAs have no annual filing regardless of balance. This is the simpler part of the SEP-vs-Solo trade-off — paperwork at the high-balance end.

Open the account before year-end if planning to contribute as an employee deferral. The deferral has to be elected (and a Solo 401(k) plan adopted) by December 31. SEP IRAs and employer contributions can wait until the tax-filing deadline.

Vanguard's setup flow takes under an hour and is documented step-by-step. Most self-employed savers can have the account open and the first contribution made in a single sitting.