Choosing the right retirement plan for your company is more than a financial decision. It’s a tool for attracting talent, keeping employees engaged, and building your own retirement savings. For many small businesses, the choice often comes down to a SIMPLE IRA or a 401(k).
Both let employees contribute from their paycheck into a retirement account, but they differ in flexibility, cost, contribution limits, and administrative complexity. This updated 2025 & 2026 guide breaks down each plan, including new rules under SECURE 2.0, so you can make a confident choice.
Key Takeaways
A SIMPLE IRA works well when you want the lowest cost and least complexity, and you’re comfortable with required employer contributions and lower contribution limits.
A 401(k) offers the most flexibility and the highest savings potential, making it attractive for owners who want to maximize contributions or expect to grow their workforce.
SECURE 2.0 rules allow more customization, including Roth options, higher contribution limits in 2026, and the ability to switch mid-year from a SIMPLE IRA to a safe harbor 401(k).
What is a SIMPLE IRA?
SIMPLE stands for Savings Incentive Match Plan for Employees. A SIMPLE IRA is for small businesses with fewer than 100 employees and offers a straightforward way to set up a retirement plan without heavy administrative or compliance requirements.
Employers must contribute either:
A 3% match on employee deferrals, or
A 2% nonelective contribution to all eligible employees’ accounts.
Recent rule changes allow for:
Roth SIMPLE IRAs, if your provider supports them
Optional additional employer nonelective contributions (up to 10% of compensation, capped annually)
3 Steps to Set Up a SIMPLE IRA
- Execute a written agreement to provide benefits to all eligible employees. (Form 5304-SIMPLE or 5305-SIMPLE).
- Provide an annual employee notice before the 60-day election period (Nov 2–Dec 31).
- Set up a SIMPLE IRA account for each eligible employee.
2025–2026 SIMPLE IRA Contribution Limits
These are the standard IRS limits for most SIMPLE IRA plans:
Employee Contribution Limits
2025: $16,500
2026: $17,000
Catch-Up Contributions (Age 50+)
2025: $3,500
2026: $4,000
Special Catch-Up (Ages 60–63)
2025 & 2026: $5,250
Some employers may be eligible for an enhanced SIMPLE structure that allows slightly higher employee contributions, but the limits remain far below what a 401(k) can accommodate.
Pros of SIMPLE IRA
- Easy to establish.
- Easy and inexpensive to maintain: no filing requirements.
- There is no discrimination testing required.
- Roth option available (if your provider supports it).
- Employer can add an optional extra nonelective contribution.
Cons of SIMPLE IRA
- Employer contributions are mandatory.
- Lower employee contribution limits than a 401(k).
- Withdrawals or rollovers to non-SIMPLE plans within the first 2 years face a 25% penalty (with limited exceptions).
- No loan feature.
What is a 401(k)?
A 401(k) is an employer-sponsored retirement plan for companies of any size. A 401(k) is versatile and can be offered to employees with or without a company match or contribution. There are limits to how much can go into a 401(k) each year, but these limits are much greater than with a SIMPLE IRA. A 401(k) can offer a Roth component for employee contributions. This means that employees can set aside after-tax money each year that can then grow tax-free.
2025–2026 401(k) Contribution Limits
Employee Contribution Limits (Under Age 50)
2025: $23,500
2026: $24,500
Catch-Up Contributions (Age 50+)
2025: $7,500
2026: $8,000
Special Catch-Up (Ages 60–63)
2025 & 2026: $11,250
Total Annual Maximum (Employee + Employer)
2025: $70,000
2026: $72,000
These higher ceilings are often the main reason business owners upgrade from a SIMPLE IRA to a 401(k).
Pros of 401(k)
- If the small business expands into a larger entity, there is no need to change plan types. 401(k) plans are for all business sizes.
- Higher contribution limits.
- Vesting is allowed; employees do not have to be 100% immediately vested in employer contributions.
- There is no matching or nonelective deferral requirement. The 401(k) plan can be set up solely for employees to contribute to their own retirement.
- Allows for a Roth provision.
Cons of 401(k)
- More paperwork is involved in the setup and maintenance of a 401(k) plan.
- Higher maintenance costs.
- Eligibility testing must be performed annually.
Curious about where your next dollar should go? Download our guide to help you decide!
SIMPLE IRA vs 401(k)
| Category | SIMPLE IRA | 401(k) |
|---|---|---|
| Availability | Small businesses with fewer than 100 employees | Companies with 1 or more employees |
| Employee contribution limit 2026 | $17,000 | $24,500 |
| Employee contribution limit 2025 | $16,500 | $23,500 |
| Employee catch-up (50+) 2026 | $4,000 (standard); $5,000 (ages 60–63) | $8,000 (standard); $11,250 (ages 60–63) |
| Employee catch-up (50+) 2025 | $3,500 (standard); $5,000 (ages 60–63) | $7,500 (standard); $11,250 (ages 60–63) |
| Employer contributions | Employers must contribute 2% non-elective or 3% match for each eligible employee | No mandatory employer contribution |
| 401(k) employer contribution limits | Not applicable (SIMPLE rules are separate) | Combined employee + employer contributions: $72,000 (2026) / $70,000 (2025) |
| Vesting | All contributions immediately 100% vested | Employer contributions may follow a vesting schedule |
| Tax benefits | Employer contributions are tax-deductible | Employer contributions are tax-deductible |
| Can it be combined with other retirement plans? | No | Yes |
| Costs / administration | Low cost and minimal administrative requirements | Higher setup costs and administrative responsibilities |
| Who is an “eligible employee”? | Must have earned at least $5,000 in any 2 preceding years and expected to earn $5,000 this year | At least 21 years old, with 1 year of service (1,000 hours), or 500 hours × 2 years under long-term part-time rule |
Can an employer have a SIMPLE IRA and a 401(k) in the same year?
Generally no. However, new rules allow a mid-year switch from a SIMPLE IRA to a safe harbor 401(k) if you meet notice requirements.
Other limited exceptions exist, such as for separate, collectively bargained employees.
Can I move my SIMPLE IRA to a 401(k)?
Yes. As long as your 401(k) accepts rollovers from prior plans, you can roll a SIMPLE IRA into your current 401(k) plan. One rule on this is that you must keep your SIMPLE IRA where it is for 2 years from when you first participated before rolling the money to any account other than another SIMPLE. If you do roll the money out before 2 years, it will be treated as an early withdrawal, and this comes with income tax as well as a 25% additional tax.
This could be a costly mistake. So, ensure you have had your SIMPLE plan in place for a full 2 years before rolling it out.
How to Choose Between SIMPLE IRA and 401(k)
A few questions can clarify which plan fits your business:
1. How much do you want to save personally?
If you want to contribute more than SIMPLE limits allow, a 401(k) offers far more runway.
2. Do you expect your business to grow?
A 401(k) is more scalable if you plan to expand your team.
3. How predictable is your cash flow?
SIMPLE IRAs require employer contributions every year.
401(k)s allow flexible employer contributions, depending on plan design.
4. Do you want to use retirement benefits as a retention tool?
401(k)s allow vesting schedules that can encourage employees to stay.
5. How much admin responsibility are you willing to manage?
A SIMPLE IRA is nearly effortless.
A 401(k) involves more oversight and annual filings.
What is a SIMPLE 401(k) plan? Is this a good option?
A SIMPLE 401(K) is a hybrid plan that has many similarities to a SIMPLE IRA with a few key differences. SIMPLE 401(k)s are meant for small businesses with fewer than 100 people, just like the SIMPLE IRA.
SIMPLE 401(k) plans still have the employer contribution rules. Employers must either do a 3% match or 2% non-elective contribution. Employees may also contribute. A SIMPLE 401(k) also does not allow for a vesting schedule. Employees are always 100% vested in employer contributions, just like a SIMPLE IRA. The annual contribution limit is also the same for SIMPLE 401(k)s as it is for SIMPLE IRAs.
The key difference between SIMPLE 401(k) plans and SIMPLE IRAs is that SIMPLE 401(k) plans may allow loans, whereas SIMPLE IRAs do not. The other difference is that, for SIMPLE IRAs, there is no age limit for determining who is an eligible employee. For the SIMPLE 401(k), an eligible employee must be at least 21 years old and have at least 1 year of service.
Choose a SIMPLE IRA or a 401(k) for your small business
A SIMPLE IRA or a 401(k) are great retirement savings options for your small business. Whichever plan you choose, make sure that you thoroughly research your options and know the administration fees and investment costs.
Ready to get started with District Capital?
At District Capital Management, we help high-earning professionals and business owners evaluate retirement plan options within the context of their entire financial picture, taxes, cash flow, long-term investing, and business growth. We don’t provide guarantees or one-size-fits-all recommendations; instead, we guide you through the key trade-offs so you can make an informed, confident decision.
If you’re interested in a comprehensive financial plan for yourself and your small business, schedule a free discovery call today.
Frequently Asked Questions
Can a small business start with a SIMPLE IRA and later switch to a 401(k)?
Yes. Under SECURE 2.0, small businesses can transition from a SIMPLE IRA to a safe harbor 401(k) mid-year if proper notice is given to employees.
Do SIMPLE IRAs or 401(k)s offer Roth contribution options?
Some providers now offer Roth SIMPLE IRAs, while most 401(k) plans include a Roth option. Both allow after-tax contributions with tax-free growth if withdrawal rules are met.
Which retirement plan has lower administrative costs, SIMPLE IRA or 401(k)?
A SIMPLE IRA typically has minimal setup and ongoing costs. A 401(k) requires more administration and compliance testing, which can increase costs but offers more flexibility and higher contribution limits.
Can business owners contribute to their own SIMPLE IRA or 401(k)?
Yes. Owners can contribute as both an employer and an employee. However, contribution limits and rules differ between SIMPLE IRAs and 401(k)s.
Are loans allowed from a SIMPLE IRA or 401(k)?
Loans are not permitted from SIMPLE IRAs. Many 401(k) plans allow loans, depending on how the plan is structured.
What happens if an employee leaves the company with a SIMPLE IRA or 401(k)?
Both plans are portable. SIMPLE IRA balances can be rolled into other IRAs (after the two-year rule), and 401(k) balances can be rolled into another employer’s plan or an IRA.
How do employer contributions differ between SIMPLE IRAs and 401(k)s?
SIMPLE IRAs require either a 2% nonelective contribution or a 3% match. 401(k) plans do not require employer contributions, but employers may choose to add matching or profit-sharing contributions.
Kayla Welte, AFC®, ChFC®, CFP®, has been helping clients maximize their finances since 2009. With a background in financial education & counseling, Kayla is passionate about helping people prioritize & reach their financial goals. Kayla is a Financial Planner at District Capital Management, a financial planning firm designed to help professionals in their 30s & 40s retire by 55. Schedule a free discovery call.
