S corporation retirement plans offer business owners a powerful way to build wealth while reducing taxable income. According to the IRS's 2024 tax statistics, S corporations now represent over 5 million business entities in the United States, making them one of the most common business structures.
Yet many S corp owners leave significant retirement savings on the table simply because they don't understand which s corporation retirement plans work best for their specific situation.
The challenge is real: you're balancing reasonable compensation requirements, payroll taxes, and the need to save for the future. Choose the wrong plan and you could overpay in administrative costs or miss out on contribution limits. Choose the right one and you could shelter tens of thousands of dollars annually.
This guide breaks down the five most effective s corporation retirement plans for S corporation owners, including contribution limits, tax implications, and exactly how to implement each option.
1. Solo 401(k): The High-Contribution Workhorse
A solo 401(k) is often the most powerful of the s corporation retirement plans for owner-only businesses or those with just a spouse on payroll. You can contribute as both employer and employee, which creates a unique stacking opportunity.
For 2024, the employee deferral limit is $23,000 (or $30,500 if you're 50 or older). On top of that, the employer contribution can reach 25% of your W-2 compensation. Combined, total contributions can hit $69,000 for 2024, or $76,500 with catch-up contributions.
The key advantage for S corp owners is that both contribution types reduce your taxable income. Your W-2 salary determines how much you can contribute, so setting reasonable compensation matters. A common scenario involves an S corp owner paying themselves $80,000 in salary, allowing a $20,000 employer contribution plus the full $23,000 employee deferral.
This is one of the s corporation retirement plans that rewards careful salary planning.
Fidelity offers solo 401(k) accounts with no setup fees and access to their full brokerage platform. You can manage contributions through their online portal throughout the year.
How to apply this: Calculate your 2024 contribution room by multiplying your W-2 salary by 25% for the employer portion, then add the $23,000 employee limit to see your total potential.
2. SEP IRA: The Simple Solution for Higher Incomes
A SEP IRA works well when you want s corporation retirement plans with minimal paperwork and no annual filing requirements. The contribution limit is straightforward: up to 25% of your W-2 compensation, capped at $69,000 for 2024.
Unlike a solo 401(k), there's no employee deferral option. Your S corporation makes all contributions as the employer. This means if you pay yourself $100,000 in salary, your maximum SEP contribution is $25,000. To hit the $69,000 cap, you'd need $276,000 in W-2 income.
The SEP IRA shines for S corp owners who want simplicity among the available s corporation retirement plans. There's no Form 5500 filing requirement, no plan document to maintain annually, and you can open one through most major brokerages in under 15 minutes. Vanguard provides SEP IRA accounts with access to their low-cost index funds and automatic contribution scheduling.
One drawback: if you have employees other than yourself, you must contribute the same percentage of salary for all eligible employees. This makes SEP IRAs less attractive for S corps with multiple staff members, pushing many owners to explore other s corporation retirement plans instead.
How to apply this: Compare your current salary against the $276,000 threshold — if you're below it and want maximum simplicity, a SEP IRA may beat a solo 401(k) for your situation.
3. Defined Benefit Plans: The Maximum Contribution Strategy
A defined benefit plan allows the largest contributions of all s corporation retirement plans. Unlike defined contribution plans with fixed annual limits, defined benefit plans calculate contributions based on the benefit you want at retirement.
The IRS permits annual contributions large enough to fund a retirement benefit of up to $275,000 per year (2024 limit). For older S corp owners, this can mean contributions exceeding $200,000 annually. The exact amount depends on your age, income history, and target retirement benefit.
Consider an S corp owner aged 55 earning $300,000 in W-2 salary. A defined benefit plan might allow a $150,000 to $200,000 annual contribution, dramatically exceeding the $69,000 cap on other plans. This makes defined benefit plans ideal for high-income owners who started saving late. Among all s corporation retirement plans, this option delivers the highest potential tax deductions.
The trade-off is complexity and cost. You'll need an actuary to calculate annual contributions, and administrative fees typically run $2,000 to $5,000 per year. The IRS also requires you to commit to funding the plan for at least several years.
How to apply this: If you're over 50 and consistently earning $200,000 or more in W-2 salary, request a defined benefit plan illustration from a third-party administrator to see your potential contribution range.
4. SIMPLE IRA: The Employee-Friendly Option
A SIMPLE IRA serves S corporations with employees who want to offer retirement benefits without the administrative burden of a 401(k). As part of the s corporation retirement plans landscape, it provides a middle ground between a SEP IRA and a full 401(k).
For 2024, employees can defer up to $16,000 (or $19,500 with catch-up contributions). As the employer, you must either match employee contributions dollar-for-dollar up to 3% of compensation or contribute 2% of each eligible employee's compensation regardless of whether they contribute.
The matching requirement applies to you as the owner as well, which can be advantageous. If you pay yourself $100,000 and defer $16,000, your S corp can match 3% ($3,000), bringing your total to $19,000. Your employees receive the same treatment, which helps with retention.
SIMPLE IRAs require no annual Form 5500 filing and have lower administrative costs than 401(k) plans. However, the contribution limits are lower than a solo 401(k) or SEP IRA, making this option best for S corps prioritizing employee benefits over maximum owner contributions. When evaluating s corporation retirement plans, weigh these trade-offs carefully.
How to apply this: Evaluate your employee count and turnover — if you have 2-10 employees and want to offer benefits with minimal admin work, a SIMPLE IRA is worth comparing against a 401(k).
5. Traditional 401(k) with Profit Sharing: The Scalable Choice
A traditional 401(k) with profit sharing gives growing S corporations flexibility to reward employees while maximizing owner contributions. This option among s corporation retirement plans combines employee deferrals with discretionary employer contributions.
The 2024 employee deferral limit is $23,000 (plus $7,500 catch-up). Employer profit sharing contributions can bring total contributions to $69,000 per participant. The profit sharing formula is flexible — you can use a pro-rata allocation, integrated with Social Security, or a new comparability formula that favors older, higher-paid owners.
A common setup uses a new comparability formula. An S corp owner aged 60 earning $200,000 might receive a $50,000 profit sharing contribution while younger employees earning $50,000 receive $5,000 each. This arrangement passes IRS nondiscrimination testing while concentrating contributions on the owner. Many sophisticated s corporation retirement plans leverage this strategy.
Administrative costs run $1,000 to $3,000 annually, plus per-participant fees. You'll need to file Form 5500 each year. Guideline offers 401(k) plans with automated administration and transparent pricing, making this option accessible for smaller S corporations.
How to apply this: If your S corp has grown past 5 employees and you want to contribute more than a SIMPLE IRA allows, request a 401(k) proposal with new comparability profit sharing from a provider.
Comparing S Corporation Retirement Plan Options
| Plan Type | 2024 Max Contribution | Best For | Key Consideration |
|---|---|---|---|
| Solo 401(k) | $69,000 ($76,500 with catch-up) | Owner-only or spouse-only S corps | Highest contribution at lower salaries |
| SEP IRA | $69,000 | Owners wanting minimal paperwork | No employee deferral option |
| Defined Benefit | $275,000+ (varies by age/income) | High-income owners over 50 | Requires actuary and multi-year commitment |
| SIMPLE IRA | $16,000 employee + 3% match | S corps with 2-10 employees | Lower limits, simpler admin |
| 401(k) with Profit Sharing | $69,000 per participant | Growing S corps with staff | New comparability favors owners |
Frequently Asked Questions About s corporation retirement plans
Can I contribute to a retirement plan if my S corp shows a loss?
Yes, you can still contribute to s corporation retirement plans if your business shows a loss, provided you paid yourself W-2 wages. Contributions are based on your compensation, not business profits. If you took a $60,000 salary despite the business losing money, you can still make employee deferrals and employer contributions based on that salary.
How do S corp distributions affect my retirement plan contributions?
Distributions do not count toward retirement plan contribution calculations. Only your W-2 wages matter for determining contribution limits. An S corp owner taking $50,000 in salary and $100,000 in distributions can only base contributions on the $50,000 salary. This is why maintaining reasonable compensation is critical for maximizing the benefits of s corporation retirement plans.
What happens if I have a solo 401(k) and hire an employee?
You must terminate or amend your solo 401(k) once you hire a non-spouse employee who works 1,000+ hours annually. The IRS gives you until the end of the plan year to correct this. You can roll the assets into a SEP IRA or traditional 401(k).
Many owners overlook this rule and face plan disqualification penalties when managing their s corporation retirement plans.
Are Roth contributions available in S corp retirement plans?
Yes, solo 401(k) plans and traditional 401(k) plans can offer a Roth option. Roth contributions are made after-tax, so they don't reduce your current taxable income. However, qualified withdrawals in retirement are tax-free.
This works well for S corp owners who expect to be in a higher tax bracket later, making Roth provisions a valuable feature in certain s corporation retirement plans.
Can I have both a SEP IRA and a solo 401(k) for my S corp?
Technically yes, but it rarely makes sense. Both plans fall under the same employer contribution limit of 25% of compensation. Having both doesn't increase your total contribution room. The solo 401(k) alone already allows the maximum employer contribution plus employee deferrals, making a SEP IRA redundant for most S corp owners evaluating their s corporation retirement plans.
Conclusion
Choosing the right s corporation retirement plans depends on your salary level, age, employee count, and savings goals. The key takeaways are:
- Solo 401(k) plans offer the highest contributions at lower salary levels for owner-only S corps
- SEP IRAs provide maximum simplicity with competitive contribution limits
- Defined benefit plans unlock six-figure contributions for high-income owners over 50
- SIMPLE IRAs balance employee benefits with administrative ease
- 401(k) plans with new comparability profit sharing scale well as your team grows
Your next step is to calculate your W-2 salary, determine your contribution capacity, and contact a plan provider or third-party administrator for a proposal. The right s corporation retirement plans can save you thousands in taxes this year while building long-term wealth.
