Retirement plans for employees rank among the most effective benefits a growing business can offer, yet most owners still don’t know which option actually fits their team. Should you set up a 401(k), a SIMPLE IRA, a SEP-IRA, or something else entirely? What does the IRS require of you as the plan sponsor? And how much will it really cost to run one properly, year after year?
These are the exact questions we field every week at Soteria HR. As part of our benefits management services, we help small to mid-sized companies design retirement offerings that work for their teams and their bottom lines. In addition, we’ve guided dozens of organizations through plan selection, provider comparisons, and the compliance maze that follows.
This guide goes further than a basic plan comparison. Below, you’ll find every major plan type, real cost ranges, employer legal duties, a step-by-step setup process, the mistakes that trip up first-time sponsors, and answers to the questions employers ask most often. By the end, you’ll have a practical, decision-ready path forward, not just a list of acronyms.
What Counts as an Employee Retirement Plan?
An employee retirement plan is any employer-sponsored program that helps workers save for retirement through tax-advantaged accounts. These plans differ from personal savings accounts because your company sets them up, selects the provider, and often contributes funds or matches employee deferrals. Specifically, the IRS regulates these programs and grants tax benefits to both you and your employees in exchange for following strict rules. For the official rules, the IRS retirement plans resource center is the authoritative starting point.
Tax-Advantaged Accounts Built for the Long Term
Retirement plans for employees work by letting workers set aside pre-tax or post-tax dollars that grow without immediate tax consequences. Contributions to traditional plans reduce taxable income today, while Roth options tax contributions now but allow tax-free withdrawals later. As a result, the money generally stays locked until age 59½, with some exceptions, which prevents early spending and keeps funds available for retirement.
The IRS sets annual contribution limits and requires specific reporting. In return, however, both you and your team get tax advantages that personal savings accounts simply can’t match.
Employer Involvement Makes It Official
What separates these plans from personal retirement accounts is your role as employer. You select the plan provider, decide which investment options to offer, handle payroll deductions, and ensure the program meets federal requirements. In particular, many plans require you to provide annual disclosures to participants and file reports with the Department of Labor. Some employers contribute matching funds or profit-sharing dollars, though that’s not required for every plan type. Above all, your active involvement in administration and oversight transforms a simple savings vehicle into an official employee benefit.
Types of Retirement Plans for Employees, Explained
You have several retirement plans for employees to choose from, and each serves different business sizes, budgets, and administrative capacities. The right plan depends on your headcount, how much you want to contribute, and how much complexity your team can handle. Below is every major option, including several that businesses often overlook.
Traditional and Roth 401(k) Plans
Traditional 401(k) plans work well for companies with 20 or more employees and offer the highest contribution limits of any workplace option, up to $23,000 annually per employee in 2024, plus catch-up contributions for workers 50 and older. You decide whether to match contributions, but these plans require annual nondiscrimination testing and regular filings with the Department of Labor. A Roth 401(k) variant lets employees contribute after-tax dollars in exchange for tax-free withdrawals in retirement, giving your team flexibility to split savings between pre-tax and post-tax buckets. For a neutral technical overview of how these accounts function, see Wikipedia’s 401(k) overview.
SIMPLE IRA and SEP-IRA Plans
SIMPLE IRA plans fit businesses with fewer than 100 employees and skip complex testing requirements. In exchange, you must contribute either a 3% match or a 2% nonelective contribution for all eligible workers, whether or not they defer their own pay. SEP-IRA plans, by contrast, work best for solo entrepreneurs or small teams where only the employer contributes, allowing up to 25% of compensation or $69,000 per person in 2024.
If you employ fewer than 10 people and want minimal administration, a SEP-IRA often provides the cleanest path forward.
Defined Benefit Pension Plans
Defined benefit pension plans still exist, and they promise a specific monthly payout at retirement rather than a variable account balance. However, they cost significantly more to run and require actuarial calculations each year, which makes them rare among small businesses today. A related option, the cash balance plan, blends features of pensions and 401(k)s and appeals mainly to high-earning professional practices, such as law firms or medical groups, that want to shelter large amounts of income quickly.
Profit-Sharing, 403(b), and ESOP Options
Beyond the plans above, a few specialized options fit specific situations. A profit-sharing plan lets you contribute a discretionary amount each year based on company performance, and it can stand alone or sit alongside a 401(k). 403(b) plans function like 401(k)s but apply specifically to nonprofits, schools, and certain tax-exempt organizations. Finally, an Employee Stock Ownership Plan (ESOP) gives workers an equity stake in the company itself, which can be a powerful retention tool for founder-led businesses planning a future ownership transition. Consider these alongside your core retirement offering when you build a competitive employee benefits package.
Quick Reference: Which Plan Fits Which Business
- 1–10 employees, minimal admin: SEP-IRA
- Under 100 employees, mandatory but simple contributions: SIMPLE IRA
- 20+ employees, highest limits and flexibility: Traditional or Roth 401(k)
- Nonprofits and schools: 403(b)
- High-earning professional practices: Cash balance or defined benefit pension
- Succession-focused, founder-led companies: ESOP
Retirement Plan Costs and Employer Responsibilities
Setting up retirement plans for employees involves both upfront expenses and ongoing obligations that vary widely by plan type. You need to budget for administrative fees, investment management costs, and potentially matching contributions, while also meeting federal reporting requirements and fiduciary responsibilities that carry real legal weight.
What You’ll Pay to Run a Plan
Traditional 401(k) plans typically cost $2,000 to $5,000 annually for small businesses, plus investment fees that range from 0.5% to 2% of plan assets. You might also pay setup fees between $500 and $2,500. SIMPLE IRA and SEP-IRA plans cost significantly less because they skip most administrative requirements, though you still pay custodial fees to the financial institution holding the accounts. Beyond provider fees, you cover your own contribution commitments, whether that’s matching employee deferrals or making nonelective contributions.
Many providers now offer low-cost 401(k) options designed specifically for small businesses, but you still need to compare fee structures carefully.
Your Legal and Fiduciary Duties
Federal law requires you to act as a fiduciary when you sponsor certain retirement plans, meaning you must put employee interests first when selecting investments and managing the program. You file Form 5500 annually for most 401(k) plans and ensure timely deposit of employee deferrals. Plans also require written documents, employee disclosures, and proper record keeping that you maintain for years. The Department of Labor’s Employee Benefits Security Administration publishes detailed fiduciary guidance if you want to review your obligations in full.
How to Choose the Right Retirement Savings Plan for Your Team
Choosing the right retirement plans for employees starts with understanding your current workforce size and projected growth over the next three to five years. Companies with fewer than 10 employees typically benefit from SIMPLE IRA or SEP-IRA plans that minimize administrative burden. Businesses with 20 or more workers, on the other hand, often find traditional 401(k) plans worth the added complexity because they offer higher contribution limits and more flexibility in employer contributions.
Match Your Budget to Your Plan Type
Your decision hinges on how much you can contribute and what administrative costs you can sustain. If you want minimal employer contributions, a SEP-IRA lets you contribute only in profitable years. SIMPLE IRAs require mandatory contributions but keep setup costs low. Traditional 401(k) plans offer optional matching that helps you control costs while still providing a competitive benefit. This kind of decision fits naturally into broader strategic benefits planning rather than a one-time purchase decision.
Start with what you can afford consistently, then upgrade your plan as revenue grows and your team expands.
Consider Employee Expectations and Competitors
Look at what similar companies in your industry offer and what candidates ask about during interviews. If competitors provide generous 401(k) matches, you risk losing talent without something comparable. Survey your current team to understand which benefits matter most, then build a plan that addresses both retention and recruitment needs. In fact, benchmarking retirement offerings works best as one piece of a larger effort to create a competitive employee benefits package overall.
How to Set Up Workplace Retirement Plans, Step by Step
Setting up retirement plans for employees requires selecting a provider, completing paperwork, and integrating payroll systems within 30 to 90 days. Below is the process broken into clear, sequential steps so nothing falls through the cracks.
- Assess your workforce size and budget. Determine your headcount, growth trajectory, and how much you can realistically commit to matching or nonelective contributions each year.
- Request proposals from at least three providers. Compare administrative capabilities, fee structures, and investment lineups side by side before committing to a single vendor.
- Select your plan design and compliance structure. Choose eligibility rules, contribution formulas, vesting schedules, and whether you need nondiscrimination testing built in.
- Complete plan documents and connect payroll. Sign the formal plan agreement and integrate your payroll system so employee deferrals transfer automatically each pay period.
- Launch enrollment and begin ongoing administration. Hold employee enrollment meetings, distribute required notices, and schedule annual reviews with your provider going forward.
Partner With the Right Provider
You evaluate providers by requesting proposals from at least three firms and comparing their administrative capabilities alongside investment lineups. Established providers like Fidelity, Vanguard, and Charles Schwab offer comprehensive platforms with lower fees for small businesses. Your provider handles most compliance tasks, manages employee accounts, and processes contribution deposits, but you remain responsible as the plan sponsor for ensuring proper operation.
Choose a provider that assigns you a dedicated contact person who understands small business needs and responds quickly when issues arise.
For a deeper walkthrough of the surrounding compliance work, see our Small Business HR: Your Ultimate Guide to Setup & Compliance.
Handle Payroll Integration and Compliance
Payroll integration connects your existing system to the retirement plan provider so employee deferrals transfer automatically each pay period. You submit contributions within 7 business days of withholding them from paychecks, track employee eligibility as headcount changes, and maintain accurate records. Annual tasks include filing Form 5500, distributing required notices, and reviewing plan performance with your provider. If this ongoing workload feels heavy, our guide on how to manage employee benefits breaks the process down further.
Common Mistakes Employers Make With Retirement Benefits
Even well-intentioned employers stumble when rolling out retirement plans for employees. Understanding these pitfalls in advance saves time, money, and compliance headaches down the road.
- Choosing a plan based on price alone. The cheapest provider often lacks the support you need during audits or employee disputes.
- Missing the 7-business-day deposit rule. Late deferral deposits are one of the most common Department of Labor violations among small businesses.
- Skipping employee education. A plan nobody understands rarely gets used, which undermines its value as a retention tool.
- Forgetting Form 5500 filings. Missed or late filings trigger penalties that compound quickly if left unaddressed.
- Never revisiting the plan design. A plan that fit your company at 8 employees may no longer fit at 40; therefore, annual reviews matter.
Retirement Plans for Employees: Frequently Asked Questions
What is the most common retirement plan for small employers?
The SIMPLE IRA and the traditional 401(k) are the two most common retirement plans for employees at small and mid-sized businesses. SIMPLE IRAs suit companies under 100 employees that want low administrative overhead, while 401(k) plans suit larger teams that need higher contribution limits.
Are employers legally required to offer a retirement plan?
In most states, no federal law mandates retirement plans for employees. However, a growing number of states now require businesses of certain sizes to offer a plan or enroll workers in a state-run alternative, so it’s worth checking your state’s specific rules.
How much does it cost to start a 401(k) for employees?
Most small businesses pay $500 to $2,500 in setup fees, followed by $2,000 to $5,000 in annual administrative costs, plus investment fees ranging from 0.5% to 2% of plan assets. Costs vary based on provider, plan complexity, and whether you choose to match employee contributions.
Can a small business with fewer than 10 employees offer a 401(k)?
Yes, a small business can offer a 401(k) at any size. That said, a SEP-IRA or SIMPLE IRA often makes more sense for very small teams because both carry lower administrative costs and skip the nondiscrimination testing that 401(k) plans require.
What happens to an employee’s retirement savings if they leave the company?
Employees generally keep their own contributions in full, along with any vested employer contributions. They can roll the balance into a new employer’s plan, transfer it to an individual IRA, or, in some cases, leave it with the original provider, depending on plan rules.
Who is considered the fiduciary for retirement plans for employees?
The employer sponsoring the plan typically holds fiduciary responsibility, which means putting employee interests first when selecting investments and providers. Many businesses hire a third-party administrator or financial advisor to share this duty, though ultimate accountability still rests with the plan sponsor.
Next Steps for a Stronger Retirement Benefits Plan
You now understand the major types of retirement plans for employees, what they cost to run, and how to match the right option to your business stage. In summary, the next move involves getting quotes from providers, comparing plan features against your budget, and deciding on contribution levels that balance competitiveness with sustainability. Most employers underestimate the time required to properly administer these programs, particularly around compliance deadlines and employee communications.
Professional HR support makes the difference between a plan that runs smoothly and one that creates headaches. At Soteria HR, we help growing companies design and manage retirement benefits that attract talent without overwhelming your team. We handle provider selection, coordinate enrollment, and keep you compliant with federal requirements so you can focus on running your business. Learn more about our benefits management services or reach out to discuss which retirement plans for employees fit your organization best.
