Retirement Planning for Self-Employed Business Owners

Why Entrepreneurs Neglect Retirement (and Why That Is Expensive)

The most common excuse is "my business is my retirement plan." This logic has a critical flaw: businesses are illiquid, unpredictable, and heavily dependent on the owner. A business valued at $500,000 today might be worth $100,000 in five years if the market shifts, a key employee leaves, or you burn out. Even if the value holds, selling a small business is difficult and time-consuming. Fewer than 20% of businesses listed for sale actually close a deal, and the process typically takes 6 to 12 months. Retirement accounts, by contrast, are liquid (after age 59.5), diversified across the entire economy, and not dependent on your continued involvement.

The tax advantages alone make retirement contributions one of the smartest financial moves for self-employed business owners. A sole proprietor earning $100,000 in net business income who contributes $25,000 to a SEP IRA reduces their taxable income to $75,000, saving approximately $6,000 to $8,000 in federal income tax depending on their bracket. That $25,000 then grows tax-deferred for decades, compounding without annual tax drag on dividends and capital gains. Over 20 years at an average 8% return, that single $25,000 contribution grows to roughly $116,000. If you make that contribution every year for 20 years, you accumulate approximately $1.2 million in retirement savings, most of it from compound growth on money that would have gone to taxes if left in a regular brokerage account.

The second most common excuse is "I cannot afford to save for retirement right now." This is understandable in the first year or two of a business, but if the business still cannot support retirement contributions after three years, that is a signal that the business model, pricing, or cost structure needs attention. A business that generates enough profit to live on but not enough to save 10% to 15% for retirement is not yet a sustainable enterprise because it depends on the owner working indefinitely without ever stopping.

Your Retirement Account Options

Self-employed individuals have four main retirement account types, each with different contribution limits, tax treatments, and administrative requirements. Choosing the right one depends on your income level, whether you have employees, and whether you prefer to pay taxes now (Roth) or in retirement (traditional).

SEP IRA (Simplified Employee Pension)

The SEP IRA is the simplest retirement account for self-employed individuals. You can contribute up to 25% of your net self-employment income (after deducting half of self-employment tax), with a maximum of $70,000 per year (2025 limit). Opening a SEP IRA takes about 15 minutes at any brokerage (Vanguard, Fidelity, Schwab), requires no annual IRS filings, and you can wait until your tax filing deadline (including extensions) to make contributions for the previous year. This flexibility is valuable for business owners whose income varies, because you can decide the contribution amount in April after seeing the final year's numbers.

The limitation is that SEP IRAs only allow traditional (pre-tax) contributions, not Roth contributions. All money contributed grows tax-deferred but is taxed as ordinary income when withdrawn in retirement. If you have employees, you must contribute the same percentage of their compensation as you contribute for yourself, which can make SEP IRAs expensive for businesses with staff. Our complete SEP IRA guide covers contribution calculations, investment options, and the specific scenarios where a SEP IRA is the best choice.

Solo 401(k)

The Solo 401(k), also called an individual 401(k) or one-participant 401(k), offers the highest contribution limits and the most flexibility for self-employed individuals without employees (other than a spouse). You can make both "employee" contributions (up to $23,500 in 2025) and "employer" contributions (up to 25% of net self-employment income), with a combined maximum of $70,000 per year. If you are 50 or older, add a $7,500 catch-up contribution for a total potential of $77,500.

The key advantage over a SEP IRA is the employee contribution portion. A business owner earning $60,000 in net self-employment income can contribute $23,500 as an employee contribution plus $15,000 as an employer contribution (25% of $60,000), totaling $38,500. The same person with a SEP IRA is limited to $15,000 (25% of $60,000). At lower income levels, the Solo 401(k) allows substantially larger contributions. Additionally, Solo 401(k) plans can accept Roth contributions on the employee portion, allowing after-tax contributions that grow and are withdrawn completely tax-free in retirement. Our Solo 401(k) guide walks through the setup process and contribution calculations.

Traditional and Roth IRA

Traditional and Roth IRAs have much lower contribution limits ($7,000 per year, $8,000 if 50 or older for 2025) but serve as supplements to a SEP IRA or Solo 401(k). If you max out your primary retirement account and still want to save more in a tax-advantaged vehicle, an IRA provides additional space. Traditional IRA contributions may be tax-deductible depending on your income level and whether you have a workplace retirement plan. Roth IRA contributions are never deductible but qualified withdrawals in retirement are completely tax-free. High-income earners who exceed the Roth IRA income limits ($161,000 for single filers, $240,000 for married filing jointly in 2025) can use a backdoor Roth IRA strategy, contributing to a traditional IRA and converting to Roth.

SIMPLE IRA

The SIMPLE IRA (Savings Incentive Match Plan for Employees) is designed for small businesses with 100 or fewer employees. Employee contributions are limited to $16,500 per year (2025), and the employer must either match contributions up to 3% of compensation or make a flat 2% contribution for all eligible employees. SIMPLE IRAs have lower limits than SEP IRAs or Solo 401(k)s, but they are useful for small businesses with employees who want to offer a retirement benefit without the administrative complexity of a traditional 401(k) plan.

How to Choose the Right Account

If you are a solo operator earning under $60,000 per year, a Solo 401(k) allows the largest contributions because the fixed employee contribution ($23,500) represents a larger share of your income than the percentage-based SEP IRA contribution (25%). If you are a solo operator earning over $100,000 per year, a SEP IRA and Solo 401(k) reach similar total contribution amounts, but the Solo 401(k) adds the Roth option and potential loan feature. If you have employees, the SEP IRA requires matching contributions for all eligible staff, which may make it expensive, while a Solo 401(k) is only available to businesses with no employees (other than a spouse).

For most solo ecommerce sellers and online business owners, the Solo 401(k) is the best choice. It offers the highest contributions at moderate income levels, includes a Roth option for tax-free retirement growth, allows loans from the plan if needed, and is relatively simple to administer for a one-person business. If you value simplicity over optimization and do not want to deal with plan documents or annual filings (required for Solo 401(k) balances over $250,000), the SEP IRA is the easier alternative with only slightly lower contribution capacity at most income levels.

Investing Retirement Contributions

The account type determines tax treatment, but you choose the investments within the account. For most business owners, a simple three-fund portfolio provides excellent diversification with minimal maintenance: a total US stock market index fund (60% to 70% of the portfolio), a total international stock market index fund (15% to 25%), and a total US bond market index fund (10% to 20%). Adjust the bond allocation based on your age and risk tolerance, increasing it as you approach retirement.

Target-date retirement funds offer an even simpler option. You choose a fund with a target year near your expected retirement (for example, a 2050 target-date fund if you plan to retire around 2050), and the fund automatically adjusts its stock-to-bond ratio as you age. Target-date funds at Vanguard, Fidelity, and Schwab have expense ratios between 0.10% and 0.15%, which is low enough that the convenience is worth the slight premium over building a three-fund portfolio yourself.

Avoid picking individual stocks within your retirement accounts. Your business is already a concentrated bet on a single venture. Your retirement savings should be the opposite: broadly diversified across thousands of companies and multiple asset classes, providing a financial foundation that does not depend on any single business, industry, or economic trend. The investment strategies guide covers portfolio construction for business owners in more detail.

Saving for Retirement on Irregular Income

The biggest practical challenge for self-employed retirement saving is inconsistent income. You cannot commit to a fixed monthly contribution when you do not know what next month's revenue will look like. Two approaches solve this problem.

The percentage approach sets aside a fixed percentage (10% to 20%) of every payment you receive. If a $5,000 marketplace payout arrives, $500 to $1,000 moves to a savings account earmarked for retirement contributions. At year end, you make a lump-sum retirement contribution with the accumulated savings. This approach automatically scales with your income: busy months generate larger savings, slow months generate smaller savings, and the annual total reflects your actual earning capacity.

The year-end approach waits until you know the full year's income and then makes a single retirement contribution before the tax filing deadline. This works well for SEP IRAs and traditional IRA contributions, which can be made up to April 15th (or October 15th with an extension) for the prior tax year. Solo 401(k) employee contributions must be made by December 31st if you are a sole proprietor, but employer contributions can be made until the tax filing deadline. The year-end approach requires more discipline because the money is available for other uses throughout the year, but it offers maximum flexibility for businesses with highly variable income.

The best practice is to combine both approaches. Set aside a percentage throughout the year into a dedicated savings account, then make the formal retirement contribution as a lump sum when you finalize your tax numbers. This way the money is saved incrementally but contributed optimally.