The Small Business Owner’s Guide: Strategies to Minimize Taxes and Build Family Wealth

How Solo 401(k)s, Strategic Family Employment, and Tax-Efficient Investing Can Transform Your Financial Future

Introduction

At Propulsion Capital Management, we work with small business owners every day who share a common frustration: watching a significant portion of their hard-earned revenue disappear to federal and state taxes. The good news? The U.S. tax code offers a powerful suite of retirement and wealth-building tools specifically designed for self-employed individuals and small business owners — tools that, when used in combination, can potentially help your family save and generate long-term wealth.

The challenge is that most small business owners only use one or two of them in isolation, leaving enormous value on the table.

In this article, we’ll walk through five core strategies — Solo 401(k)s, SEP IRAs, employing your children, 529 plans, and more tax-efficient portfolio construction — and show you how they can work together to create a comprehensive wealth-building system for your family. While we’ll cover the key concepts and illustrate the potential impact with hypothetical numbers, the implementation is always tailored to your specific business, family, and financial goals.

Strategy 1: The Solo 401(k) — A Powerful

Retirement Tool

The Solo 401(k), also known as an Individual 401(k), is arguably the single most powerful tax-advantaged retirement vehicle available to self-employed individuals with no full-time employees (other than a spouse). It offers the highest contribution limits of any retirement plan available to sole proprietors and single-member LLCs.

Contribution Limits That Make a Real Difference

The Solo 401(k) allows contributions in two capacities — as both the employee and the employer. For 2026, the combined limit reaches $72,000 for those under 50, with additional catch-up contributions available for those 50 and older. A self-employed individual aged 60–63 could potentially shelter up to $83,250 from current-year taxation (IRS Notice 2025-67). That is a staggering amount of tax-deferred savings — and it’s available to you every single year.

Roth Option and Mega Backdoor Roth

Many Solo 401(k) providers now offer a designated Roth option, allowing you to make employee deferrals on an after-tax basis. While you don’t get a current-year deduction, all future growth is tax-free — a powerful choice if you expect to be in a higher tax bracket in retirement or want to create a tax-free legacy for your heirs.

Some plans also permit after-tax contributions that can be converted to Roth via an in-plan conversion — the so-called “mega backdoor Roth.” This strategy can increase your tax-free wealth accumulation, but it requires careful plan design and administration. Our team at Propulsion Capital Management helps clients determine whether this approach is right for their situation and ensures the plan document properly supports it.

Who Qualifies?

You qualify for a Solo 401(k) if you are self-employed with no full-time W-2 employees other than your spouse. This includes sole proprietors, single-member LLCs, partnerships (for each partner), and S-corporation shareholders who are the sole employee. If you have full-time employees, you’ll need a standard 401(k) plan or should consider a SEP IRA.

Strategy 2: SEP IRAs — Simplicity Meets

Generous Limits

The Simplified Employee Pension (SEP) IRA is the workhorse retirement plan for small business owners who want simplicity. There are no annual IRS filings, and it can be established and funded as late as your tax filing deadline, including extensions. For 2026, the maximum contribution is $72,000 (or 25% of compensation, whichever is less) (IRS Notice 2025-67).

SEP IRA vs. Solo 401(k): Choosing the Right Plan

While both plans offer generous contribution limits, the Solo 401(k) usually wins for most sole proprietors. The Solo 401(k) allows employee deferrals regardless of profit level, offers a Roth option (SEP IRAs are pre-tax only), and can include loan provisions. The SEP IRA’s advantage is pure simplicity — no plan document amendments, no annual filings, and last-minute setup capability.

Choosing the right retirement plan depends on your specific business structure, income level, number of employees, and long-term goals. This is one of the first things we evaluate when working with new clients at Propulsion Capital Management — the right plan choice alone can potentially generate additional tax savings.

Strategy 3: Employing Children

Many family businesses hire children to perform legitimate work—such as filing, social media management, data entry, or appearing in marketing materials—and pay them a reasonable wage. That compensation is a deductible business expense for the business and earned income for the children. Given their lower tax bracket, that money is often subject to lower taxes, or zero federal tax if the compensation is below the standard deduction for the child.

The Compounding Effect: Where Real Wealth Is Built

Once a child has earned income, they can contribute up to $7,500 (2026) to a Roth IRA (IRS Notice 2025-67). The remaining earnings can be invested in a custodial brokerage account. The key is to invest these funds in tax-efficient vehicles and let compounding do its work over decades. Consider this: a 14-year-old who can earn and invests $15,000 per year for five years (ages 14–18) and earns an average annual return of 8% will have approximately $95,000 by age 19.  

Strategy 4: 529 Plans — Tax-Free Education Savings

While employing your children builds long-term general-purpose wealth, 529 education savings plans address a specific and significant expense: the cost of higher education. Contributions grow tax-free, and withdrawals are tax-free when used for qualified education expenses. Many states also offer a state income tax deduction or credit for contributions.

A valuable recent development: the SECURE 2.0 Act now allows unused 529 plan funds to be rolled over into the beneficiary’s Roth IRA, subject to certain conditions including a $35,000 lifetime cap and a 15-year account age requirement. This provides a valuable safety net for families who overfund a 529 or whose child receives a scholarship, and it reinforces the value of opening 529 accounts early.

Strategy 5: Tax-Efficient Portfolio Construction

Getting money into the right accounts is only half the equation. Equally important is what you invest in and where you hold those investments. Poor investment choices can erode the tax benefits you’ve worked hard to secure.

The core principles of tax-efficient investing include:

·       Low-turnover index funds and ETFs that minimize taxable capital gains distributions.

·       Strategic asset location — holding tax-inefficient investments (bonds, REITs) inside tax-advantaged accounts and tax-efficient investments in taxable accounts.

·       Tax-loss harvesting to offset gains and reduce your annual tax liability.

At Propulsion Capital Management, tax-efficient portfolio construction is a cornerstone of our investment philosophy. We build portfolios designed to maximize after-tax returns across every account in your family’s financial picture — because it’s not what you earn that matters, it’s what you keep.

Let’s Build Your Plan

Our team specializes in helping small business owners implement these strategies as part of a comprehensive, personalized financial plan. We’ll evaluate your specific situation, identify the strategies that will have the greatest impact for your family, and coordinate the details of implementation — working alongside your CPA and tax attorney as needed — so you can focus on running your business.

Ready to take the next step? Visit us at propulsioncapitalmanagement.com or contact our team directly to schedule a complimentary consultation.

Disclaimer: This article is for informational purposes only and does not constitute tax, legal, or investment advice. Tax laws are subject to change. Consult with qualified tax and financial professionals before implementing any strategy discussed herein. Investment returns are hypothetical and not guaranteed. Past performance does not guarantee future results.