Several types of retirement plans—including 401(k), defined benefit, and profit-sharing plans—can be suitable for established small businesses and professional practices. However, if you operate a very small business, such as a home-based, start-up, or sideline business, you may want to consider a Savings Incentive Match Plan for Employees (SIMPLE IRA).
A SIMPLE IRA is a retirement plan designed for small businesses. It encourages employers to provide retirement benefits to eligible employees and may also be an option for certain self-employed individuals without employees.
Contributions generally come from two sources: employee salary-reduction contributions and employer contributions. A self-employed individual without employees may contribute in both capacities, subject to the applicable rules.
Generally, a business must have 100 or fewer employees who received at least the applicable compensation threshold in the preceding calendar year to establish a SIMPLE IRA, and it generally cannot maintain another employer-sponsored retirement plan during the same year. Specific eligibility rules and exceptions apply.
Table of Contents
- How Much You Can Put In and Deduct
- Withdrawal: Easy, but Taxable
- A SIMPLE IRA
- What’s Not So Good About SIMPLE IRAs
- How to Get Started in a SIMPLE IRA
How Much You Can Put In and Deduct
For business owners with relatively modest earnings, a SIMPLE IRA may provide a straightforward way to save for retirement while receiving tax advantages. Eligible contributions may reduce taxable income, subject to IRS rules and the individual’s circumstances.
For reference, the standard employee elective deferral limit for a SIMPLE IRA was $16,500 in 2025, compared with $16,000 in 2024. The amount an owner can contribute depends on compensation or net self-employment earnings, the plan’s terms, and applicable contribution limits.
Employer contributions are also generally required. Depending on the plan, an employer may make matching contributions based on employee contributions or a prescribed contribution for eligible employees. The rules and calculations for self-employed individuals differ from those that apply to employees receiving wages.
For 2025, the standard catch-up contribution limit for eligible SIMPLE IRA participants aged 50 or older was generally $3,500. Beginning in 2025, eligible participants aged 60 through 63 could qualify for an increased catch-up limit of $5,250. These are historical 2025 figures; verify current limits and eligibility with the IRS or a qualified retirement-plan professional.
Example from the original article: An owner-employee aged 60, 61, 62, or 63 in 2025 with $50,000 in self-employment earnings might have been eligible to make a $16,500 employee contribution, a $5,250 catch-up contribution, and a $1,500 employer contribution under the example’s assumptions, for a total of $23,250. Actual allowable contributions depend on the applicable self-employment and plan rules.
Eligible lower-income participants may also qualify for the federal Retirement Savings Contributions Credit, commonly known as the Saver’s Credit. Eligibility and the amount of the credit depend on factors such as adjusted gross income, filing status, age, and qualifying contributions. The credit limits and rules should be checked for the relevant tax year.
SIMPLE IRAs may be worth considering for home-based businesses and individuals earning additional income from a sideline business. If living expenses are covered by a primary job or a spouse’s income, a business owner may be able to direct more of the eligible business earnings toward retirement savings, within the applicable limits.
However, an individual 401(k), also called a solo 401(k), may permit higher contributions for some self-employed individuals. For example, the original article compares the contribution potential of a SIMPLE IRA and an individual 401(k) for someone with $50,000 in self-employment earnings in 2025. The actual amount available under either plan depends on the person’s age, eligible compensation, plan terms, and applicable IRS calculations.
Before choosing a plan, compare the total contribution limits, employer contribution requirements, administrative costs, and eligibility rules for each option.
Withdrawal: Easy, but Taxable
SIMPLE IRA funds may generally be withdrawn, but taking money out can result in income tax and, in some circumstances, an additional tax on early distributions.
For many participants, distributions taken before age 59½ may be subject to an additional 10% tax unless an exception applies. For SIMPLE IRAs, the additional tax may rise to 25% for certain early distributions made during the first two years of participation, subject to the applicable rules and exceptions.
Because withdrawals can reduce retirement savings and create tax costs, review the applicable distribution rules and consult a tax professional before taking money out of a SIMPLE IRA.
A SIMPLE IRA
A SIMPLE IRA is generally easier to establish and operate than many more complex retirement plans. Contributions are deposited into individual IRA accounts, and participants use the investment options offered by their financial institution.
Individuals who are already familiar with IRA rules may find the arrangement relatively straightforward. However, account terms, investment choices, beneficiary provisions, and creditor protections can vary, so participants should review the account documents carefully.
Administrative and reporting requirements may be less burdensome than those associated with some other employer-sponsored plans, particularly for small businesses. Financial institutions serving as trustees or custodians generally handle certain account-related reporting responsibilities.
Even with a relatively simple plan, employers must comply with applicable eligibility, contribution, notice, deposit, and reporting requirements. Self-employed individuals should also ensure that contributions are calculated and reported correctly.
What’s Not So Good About SIMPLE IRAs
Although SIMPLE IRAs offer advantages, they may not be the best choice for every business. As self-employment earnings increase or a business’s retirement objectives change, another type of plan may offer more suitable contribution opportunities or features.
Contribution Timing and Deadlines
Contribution deadlines differ depending on the type of contribution, the employer’s circumstances, and applicable rules. Employer contributions and employee salary-reduction contributions may have different requirements. Self-employed individuals should not assume that the same deadlines apply to both portions of their contributions.
Making contributions earlier may also give investments more time to grow. However, the timing decision should be balanced with cash-flow needs and the applicable contribution deadlines.
Plan Establishment Deadlines
A SIMPLE IRA generally must be established by October 1 of the year for which it is intended to operate. A special rule may apply when a business is established after October 1, allowing the plan to be established as soon as administratively feasible. Confirm the applicable deadline before relying on a SIMPLE IRA for a particular tax year.
This timing requirement can make a SIMPLE IRA less flexible than some other retirement arrangements that may allow an employer to establish a plan after the end of the tax year, subject to specific rules.
Participation in Another Employer’s Plan
If you operate a sideline business and also contribute to a 401(k) or another employer-sponsored retirement plan through a separate job, your contribution limits may be affected.
Employee elective deferrals across certain plans, including 401(k) and 403(b) arrangements, generally share an annual limit. The coordination rules can be complex, and the treatment of SIMPLE IRA contributions depends on the type of plan and applicable law.
For example, the original article uses a 2025 scenario in which an individual under age 50 contributes to a 401(k) through one job and also has a SIMPLE IRA for a separate business. The allowable contributions must be calculated under the relevant limits rather than assuming that each plan provides a completely separate employee deferral allowance.
Before contributing to multiple retirement plans, consult your accountant or plan administrator to determine the amount you can legally contribute and deduct.
How to Get Started in a SIMPLE IRA
SIMPLE IRAs are commonly offered by financial institutions that also provide traditional IRAs and 401(k) plans. A provider can explain its investment options, account fees, plan documents, and administrative services.
When establishing a plan, employers generally need to complete the appropriate plan documentation and adoption agreement. The documentation identifies the plan’s effective date and the arrangements for employee contributions and employer contributions.
A salary-reduction agreement is also used to record an employee’s election to contribute through salary deductions. Self-employed individuals must follow the applicable procedures for making contributions from their business earnings.
Financial institutions may provide instructions explaining how to operate the plan and meet ongoing requirements. The business owner will also need to establish their own SIMPLE IRA account if participating in the plan.
Before signing any documents, confirm the plan’s eligibility requirements, establishment deadline, contribution formula, employee notice obligations, and annual contribution limits. A qualified accountant or retirement-plan professional can help you determine whether a SIMPLE IRA is the right fit for your business.
Important: This article discusses retirement plans under U.S. law. The contribution limits and certain rules mentioned in the source refer to 2024 and 2025 and may have changed. Confirm current IRS guidance before making retirement-plan or tax decisions.
