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Guide · Retirement plans
Owners with no employees other than a spouse can use a solo 401(k) to contribute both as employee and as employer, often far more than an IRA or SEP allows at the same income.
Serving United States, Virginia, Washington, DC, Maryland.
What we handle
As the employee, you can defer salary up to the annual section 402(g) limit, with an additional catch-up amount at age 50 and higher catch-up limits at ages 60 to 63. As the employer, the business can add a profit-sharing contribution of up to 25% of W-2 wages for an S corporation owner, or about 20% of net self-employment earnings for a sole proprietor. Total contributions are capped by the annual section 415(c) limit.
Employee deferrals can be made as Roth contributions, and many plans now allow Roth employer contributions too. Plans can generally be adopted up to the tax return due date for employer contributions, and Form 5500-EZ is required once plan assets exceed $250,000.
Speak with an advisorWhere we help
Limits elective deferrals each year, with catch-up contributions for older participants.
Caps total annual additions from all sources.
Allows Roth deferrals inside the plan.
Required once plan assets exceed $250,000.
Our approach
A senior advisor reviews your facts and documents.
Scope, fees and timeline in an engagement letter.
Returns, elections and forms prepared and reviewed.
IRS contact and planning all year.
Questions
If your question isn't here, call (703) 880-8412 and you'll reach a person.
Usually at moderate incomes, because the employee deferral adds to the employer contribution. At very high incomes the totals can be similar.
Yes, if your spouse works in the business and is paid, which can double the household contribution.
The plan must then cover eligible employees, so it becomes a regular 401(k) plan.
Yes. High-income owners often pair a 401(k) with a cash balance plan for much larger deductions.
Latest updates
Authorized representatives can now make balance-due, amended return, extension, proposed assessment and federal tax deposit payments for business clients online. Appropriate authorization for the client and tax matter is required.
Source: IRS (IR-2026-134)
For 2027 the joint-return standard deduction rises to $33,200, the estate tax basic exclusion to $15,480,000, the annual gift exclusion to $20,000 and the Section 179 expensing limit to $2,640,000. Our advisors recommend revisiting year-end gifting and equipment purchase plans with these figures in mind.
Source: IRS (IR-2026-133)
All 6,576 nominated census tracts, including 2,594 rural tracts eligible for enhanced benefits, become Opportunity Zones on January 1, 2027 for ten years. Investors with capital gains should review the new map before committing funds.
Source: IRS (IR-2026-132)
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