Trucking Retirement Planning: SEP IRA, Solo 401(k), and Building Wealth as an Owner-Operator

Most owner-operators are good at making money. They’re bad at keeping it for later. The median career in long-haul trucking is shorter than most drivers assume, and the physical demands of the job (sitting, loading, irregular sleep, thousands of hours behind the wheel) mean few owner-operators can realistically keep running past their mid-60s. Unlike a company driver who may have access to an employer 401(k) with a matching contribution, an independent owner-operator has no pension, no employer match, and no automatic payroll deductions routing money into a retirement account. Unless you set something up yourself, the only retirement income you’ll have is Social Security, and for self-employed truckers that benefit is calculated on net self-employment earnings (after expenses), not gross revenue. A driver who grosses $250,000 but nets $90,000 after fuel, insurance, maintenance, and depreciation is building a Social Security benefit based on the $90,000 figure. That’s a surprise to a lot of people.

The good news is that the tax code gives self-employed individuals access to retirement plans that can shelter $70,000 or more per year from current income tax. These aren’t exotic strategies. They’re standard retirement accounts, available to any owner-operator willing to open one and fund it. The retirement contribution is a business deduction, which means it reduces your taxable income in the year you make it, lowers your quarterly estimated tax payments, and grows tax-deferred (or tax-free, if you use a Roth option) until you draw on it in retirement. It’s the single most powerful tax-planning tool available to a self-employed trucker, and the majority of owner-operators don’t use it at all.

Why do owner-operators need a separate retirement plan?

Owner-operators have no employer standing behind them. A company driver at a large carrier may have a 401(k) with a 3% to 6% employer match, which is free money on top of the driver’s own contributions. An owner-operator gets none of that. The self-employment tax system provides Social Security and Medicare coverage, but the Social Security benefit alone won’t cover most people’s living expenses in retirement, and for owner-operators the benefit amount is often smaller than expected because the calculation uses net self-employment earnings, not gross receipts.

There’s another factor that’s specific to trucking. The job has an expiration date. The Bureau of Labor Statistics reports high turnover and relatively short median tenure across the industry. The reasons aren’t mysterious: the work is physically demanding, time away from home is hard on families, and regulatory requirements (DOT medical exams, random drug testing, hours-of-service compliance) create constant friction. A driver who enters the industry at 30 and plans to retire at 67 has 37 years of saving ahead of them. A driver who enters at 45 and can’t keep driving past 62 has 17 years, and those 17 years need to do the work of 37. Starting late means contributing more, and the retirement plan limits are generous enough to allow that.

Beyond the wealth-building function, every dollar contributed to a retirement plan is a dollar deducted from your current-year taxable income. An owner-operator in the 22% federal tax bracket who contributes $30,000 to a Solo 401(k) reduces their federal income tax by $6,600 for that year. The money isn’t gone; it’s in the driver’s retirement account, growing tax-deferred. The contribution also reduces adjusted gross income, which affects the calculation for other tax benefits (the premium tax credit for ACA health insurance, for example, is based on AGI, and a lower AGI can mean larger subsidies). For a self-employed trucker, the retirement contribution is simultaneously a savings vehicle, a tax deduction, and an AGI management tool.

What is a SEP IRA and how does it work for truckers?

A SEP IRA (Simplified Employee Pension Individual Retirement Account) is the simplest retirement plan available to a self-employed individual. It’s established under IRC 408(k), and the setup is a single-page form (IRS Form 5305-SEP or a brokerage equivalent). There’s no annual filing requirement with the IRS, no plan document to maintain beyond the initial adoption agreement, and the administrative burden is as close to zero as a retirement plan can get.

The contribution limit for a SEP IRA is 25% of net self-employment income, after the self-employment tax deduction, up to a maximum of $70,000 for 2025. For a sole proprietor or single-member LLC, the effective contribution rate is approximately 20% of net Schedule C income after the self-employment tax adjustment. The math works like this: you start with net profit from Schedule C, subtract half of your self-employment tax (the deductible portion under IRC 164(f)), and then apply 25% to that adjusted figure. Because the SEP contribution itself reduces earned income, the circular calculation lands at about 20% of unadjusted net profit. It’s counterintuitive, but it’s the standard formula.

The funding deadline is the biggest advantage of the SEP IRA for truckers who don’t plan ahead. You can open and fund a SEP IRA up to your tax filing deadline, including extensions. That means an owner-operator who files for an extension has until October 15 to decide how much to contribute and to actually move the money. A driver who had a great year hauling freight in 2025 but didn’t think about retirement until tax season can still open a SEP in September 2026 and contribute for the 2025 tax year. No other plan is this forgiving on timing.

The disadvantages are real, though. First, the SEP IRA is employer-contribution only. There’s no employee deferral component. That means the contribution is calculated as a percentage of income, and you can’t “top up” with a flat dollar amount the way you can with a 401(k). At lower income levels, 20% of net income may be a modest amount. An owner-operator with $60,000 in net SE income can contribute approximately $12,000 to a SEP, which is respectable but well below the $23,500 employee deferral available in a Solo 401(k). Second, there’s no Roth option. SEP contributions are always pre-tax, meaning the money is taxed when withdrawn in retirement. Third, if the owner-operator has employees, the SEP requires the same contribution percentage for all eligible employees. An owner who contributes 15% for themselves must contribute 15% for every employee who has worked for the business in at least three of the last five years and earned at least $750 in compensation. For a single owner-operator with no W-2 employees, this isn’t a concern. For someone who hires a second driver, it changes the calculation entirely.

How is a Solo 401(k) different from a SEP IRA?

A Solo 401(k), also called an Individual 401(k), is a one-participant 401(k) plan designed for self-employed individuals with no employees other than a spouse. It’s authorized under IRC 401(k) and follows the same basic rules as a corporate 401(k), but without the complexity of managing multiple participants. For an owner-operator, it’s the most flexible retirement plan available.

The Solo 401(k) has two contribution components. The first is the employee deferral: you can contribute up to $23,500 for 2025, the same limit that applies to any employee in a regular 401(k). If you’re age 50 or older, you get an additional $7,500 catch-up contribution, bringing the employee deferral to $31,000. Under the SECURE 2.0 Act, participants age 60 through 63 get an enhanced catch-up limit of $11,250 for 2025, pushing the total employee deferral to $34,750 for that age group. The second component is the employer profit-sharing contribution: up to 25% of net SE income (after the SE tax adjustment), using the same formula as a SEP IRA.

The combined limit for both components is $70,000 for 2025 ($77,500 with the standard catch-up, or $81,250 with the enhanced age 60-63 catch-up). That’s the same dollar cap as the SEP IRA, but the Solo 401(k) lets you reach it at lower income levels because of the employee deferral. An owner-operator who nets $60,000 can defer $23,500 as the employee contribution (it’s capped at the lesser of the limit or 100% of earned income) plus approximately $11,100 in employer profit-sharing (using the effective rate), for a total of about $34,600. The same driver would be limited to roughly $11,100 in a SEP IRA, because the SEP has no employee deferral. At moderate income levels, the Solo 401(k) roughly triples the available contribution.

The Roth option is the other major differentiator. The employee deferral portion of a Solo 401(k) can be designated as Roth contributions, meaning you pay tax on the contribution now (no current deduction for the Roth portion) but the money grows tax-free and comes out tax-free in retirement. The employer profit-sharing portion has historically been pre-tax only, though the SECURE 2.0 Act now permits Roth employer contributions as well (not all plan providers have updated their documents to allow this). The Roth option doesn’t exist in a SEP IRA at all.

The Solo 401(k) also offers a loan provision. Under IRC 72(p), you can borrow up to the lesser of $50,000 or 50% of your vested account balance. The loan must be repaid within five years (longer for a primary residence) with substantially level payments at least quarterly. For an owner-operator, the loan provision can serve as an emergency fund of sorts: if the truck needs a major repair and cash is tight, borrowing from your own 401(k) at a reasonable interest rate (you’re paying the interest to yourself) is a better option than a payday loan or running up credit card debt. It’s not ideal to borrow from retirement savings, but having the option is a meaningful advantage over the SEP IRA, which doesn’t permit loans.

The trade-offs: more paperwork, a firm establishment deadline, and an annual filing once the balance grows. The Solo 401(k) must be established (plan documents signed) by December 31 of the year for which you want the first contribution. You can’t wait until tax-filing time the way you can with a SEP. The contributions themselves can be funded up to the tax filing deadline (including extensions), but the plan must exist before the calendar year ends. Once the total plan assets exceed $250,000, you must file Form 5500-EZ with the IRS each year. It’s a simple one-page form, but it’s a deadline to track. And the plan documents themselves (adoption agreement, basic plan document) are more involved than the single-page SEP setup, though most brokerages (Fidelity, Schwab, Vanguard) provide the documents free of charge when you open the account.

Is a SIMPLE IRA ever the right choice for an owner-operator?

A SIMPLE IRA (Savings Incentive Match Plan for Employees) is a retirement plan available to employers with 100 or fewer employees who don’t maintain another retirement plan. It has lower contribution limits than either the SEP or Solo 401(k): the employee deferral is $16,500 for 2025 (plus $3,500 catch-up for age 50+, or $5,250 for ages 60-63 under SECURE 2.0), and the employer contribution is either a 2% non-elective contribution for all eligible employees or a dollar-for-dollar match up to 3% of compensation.

For a single owner-operator with no employees, the SIMPLE IRA is almost never the optimal choice. The maximum total contribution at any income level is $16,500 plus the 3% match on net SE income, which at $120,000 of income produces roughly $16,500 + $3,600 = $20,100. The same driver could contribute $40,000 or more to a Solo 401(k). The SIMPLE IRA’s lower limits make sense for small employers who want a low-cost plan with minimal administrative burden and modest employer contribution obligations. For an owner-operator trying to maximize tax-deferred savings, the math doesn’t work.

There’s one scenario where the SIMPLE IRA has a narrow advantage. If the owner-operator has a few W-2 employees (a second driver, a dispatcher, a mechanic) and doesn’t want to make the 25% employer contribution that a SEP would require for each of them, the SIMPLE IRA’s 3% match is significantly cheaper per employee. But even in that scenario, the Solo 401(k) can’t be used (it’s limited to owner-only businesses), and the decision becomes SEP vs SIMPLE, with the SIMPLE winning only when the employer contribution cost for employees outweighs the owner’s lost contribution capacity. This is a situation that requires running the numbers with your specific payroll.

How does entity structure change the contribution calculation?

The entity you operate under controls what counts as “earned income” for retirement plan purposes, and that changes how much you can contribute. This is one of the most overlooked interactions in trucking tax planning.

As a sole proprietor or single-member LLC (disregarded for tax purposes), your contribution base is net self-employment income from Schedule C, adjusted for the deductible half of self-employment tax. You’ve seen the formula above. The number tracks directly with business profitability, which means a big year on the road produces a big contribution opportunity, and a bad year (truck breakdown, rate downturn, injury layoff) produces a small one. There’s no salary to set, no payroll to run for retirement purposes, and the contribution is calculated on your tax return when it’s prepared.

With an S-corp election, the calculation shifts fundamentally. Under an S-corp, the retirement plan contribution is based on your W-2 salary, not on total S-corp income. The employer profit-sharing contribution (the 25% component) is calculated on W-2 wages. The employee deferral (the $23,500 component) is also based on compensation, but since it’s capped at a flat dollar amount, the W-2 salary just needs to be at least $23,500 for the full deferral to be available.

This creates a tension that owner-operators need to understand. A lower W-2 salary saves self-employment tax (the FICA savings that make the S-corp attractive in the first place), but it also reduces the employer contribution base. A higher W-2 salary costs more in FICA but unlocks a larger retirement contribution.

For a sole proprietor at the same $150,000 income level, the Solo 401(k) calculation produces: employee deferral of $23,500, plus employer profit-sharing of $150,000 x 0.18587 = $27,881, for a total of $51,381. That’s more than either S-corp scenario above, because the full net SE income serves as the contribution base without the salary split. But the sole proprietor is also paying self-employment tax on the entire $150,000 of net income (approximately $21,194), whereas the S-corp driver with a $70,000 salary pays $10,710 in FICA. The FICA savings of $10,484 in the S-corp exceed the retirement contribution advantage of the sole proprietorship ($51,381 minus $41,000 = $10,381). This is a close call at $150,000, and it’s the reason the S-corp salary decision and the retirement contribution decision need to be made together, not in isolation.

When should a trucker choose Roth contributions over traditional pre-tax?

The Roth vs traditional question is one of the most consequential decisions in retirement planning, and for owner-operators it has a trucking-specific dimension. The basic framework is straightforward: traditional (pre-tax) contributions reduce your taxable income now but are taxed as ordinary income when you withdraw them in retirement. Roth (after-tax) contributions give you no deduction now, but the money grows tax-free and comes out tax-free in retirement, provided you meet the qualifying distribution rules (age 59 1/2 and five years since the first Roth contribution to the plan).

The conventional wisdom is to contribute pre-tax when your current tax rate is high and Roth when it’s low. If you’re paying 32% today and expect to pay 22% in retirement, pre-tax wins. If you’re paying 12% today and expect to be higher later, Roth wins. The answer depends on a comparison between your marginal tax rate today and your effective tax rate in retirement.

For owner-operators, the Roth case is often stronger than they realize, for three reasons.

First, many owner-operators have taxable income that’s lower than their cash income would suggest. After deducting fuel, insurance, repairs, depreciation (especially Section 179 or 100% bonus depreciation under IRC 168(k) on a new or used truck), per diem, and all other business expenses, a driver who grosses $250,000 might have taxable income in the 12% or 22% bracket. If the driver takes the Section 179 deduction on a $160,000 truck in the same year, taxable income could land in the 12% bracket or even show a loss. That’s a year when Roth contributions are extremely cheap, because the tax paid on the contribution is low.

Second, retirement income often ends up higher than people expect. Social Security benefits are partially taxable (up to 85% of benefits are included in taxable income at higher income levels). Required minimum distributions (RMDs) from traditional retirement accounts begin at age 73 (75 starting in 2033 under SECURE 2.0) and force withdrawals whether you need the money or not. If the driver has saved well, the combination of Social Security income, RMDs from a traditional IRA or 401(k), and any other income (part-time work, rental income, pension) can push the retiree into a higher bracket than they were in during their working years. Roth withdrawals don’t count toward this calculation, because they’re not included in taxable income.

Third, tax rates in the future are uncertain. The current individual rate structure under the Tax Cuts and Jobs Act is scheduled to sunset after 2025 unless extended. If rates revert to pre-TCJA levels, the 12% bracket would become 15%, the 22% bracket would become 25%, and the 24% bracket would become 28%. Paying tax at today’s rates and locking in tax-free growth is a hedge against rising rates.

The Roth decision isn’t right for everyone. An owner-operator in the 32% or 35% bracket today who expects to be in the 22% bracket in retirement is better off with traditional pre-tax contributions. The key is knowing your current marginal rate, which requires an accurate projection of taxable income after all deductions, and making an informed estimate of your retirement tax situation. Your CPA should be running this comparison every year as part of the tax-planning process, because the answer can change from year to year as income fluctuates.

How do catch-up contributions work for older drivers who started saving late?

The catch-up contribution rules exist specifically for people who didn’t start saving early enough, and truckers who entered the industry later in life or spent years as company drivers without access to a good plan are the target audience.

For Solo 401(k) plans, the standard catch-up contribution for participants age 50 and older is $7,500 on top of the regular $23,500 employee deferral, bringing the employee component to $31,000. The employer profit-sharing contribution (up to 25% of net SE income or W-2 salary) is unaffected by the catch-up, so the total plan limit for someone age 50 or older is $77,500 for 2025.

Starting in 2025, the SECURE 2.0 Act introduces a higher catch-up limit for participants aged 60 through 63. Instead of $7,500, these participants can defer an additional $11,250, bringing the employee deferral to $34,750 and the total plan limit to $81,250. This is a four-year window, because it applies only to ages 60, 61, 62, and 63. At age 64, the catch-up reverts to the standard $7,500. The window is designed to help people in the final stretch before retirement make up for lost time.

For SEP IRAs, there are no catch-up contributions. The contribution is a percentage of income regardless of age. This is another point in favor of the Solo 401(k) for older drivers.

For SIMPLE IRAs, the standard catch-up is $3,500 for age 50+, and SECURE 2.0 provides an enhanced catch-up of $5,250 for ages 60-63. Even with the enhanced catch-up, the SIMPLE IRA’s total capacity is well below the Solo 401(k).

The practical impact for a trucker who started late is significant. A 55-year-old owner-operator with $130,000 in net SE income who maxes out a Solo 401(k) can contribute approximately $31,000 (employee deferral with catch-up) plus $24,163 (employer profit-sharing) = $55,163 per year. Over 10 years of consistent contributions at that level, assuming 7% average returns, the account grows to approximately $761,000. That’s a meaningful retirement fund, built in a single decade. The same driver in a SEP IRA would be limited to approximately $24,163 per year with no catch-up, reaching roughly $334,000 over the same period. The catch-up contributions alone account for over $400,000 of the difference.

What are the deadlines and practical steps to get started?

Setting up a retirement plan as an owner-operator is not complicated, but the deadlines are firm, and missing them means waiting an extra year. Here’s what each plan requires.

SEP IRA setup and funding:

• Open the account at any major brokerage (Fidelity, Schwab, and Vanguard all offer free SEP IRA accounts with no setup fees and no annual maintenance charges)
• Complete the adoption agreement (IRS Form 5305-SEP or the brokerage’s equivalent one-page form)
• Deadline to establish AND fund: your tax filing deadline, including extensions. For a sole proprietor filing Form 1040, that’s April 15, or October 15 if you file an extension. This means you can open a SEP IRA in September 2026 and make your 2025 contribution that same day
• No annual filing with the IRS (no Form 5500)
• Contributions are reported on Schedule 1, Line 16

Solo 401(k) setup and funding:

• Open the account at a major brokerage (same providers offer free Solo 401(k) plans)
• Complete the plan adoption agreement and the basic plan document (the brokerage provides these; it takes 15 to 30 minutes)
• Deadline to establish the plan: December 31 of the year for which you want the first contribution. If you want to make a 2025 contribution, the plan must be set up by December 31, 2025
• Deadline to fund contributions: tax filing deadline, including extensions. You can transfer the money into the account up to October 15, 2026 (with extension) for a 2025 contribution, as long as the plan was established by December 31, 2025
• For the employee deferral as a sole proprietor: the deferral should be made by December 31 of the tax year (the IRS guidance for sole proprietors is that the deferral is due by the date earnings are received or currently available, which for a sole proprietor effectively means the end of the tax year)
• File Form 5500-EZ once total plan assets exceed $250,000 (due July 31 following the plan year-end, with an extension available)
• Contributions are reported on Schedule 1, Line 16

Investment approach:

The retirement plan is a container. What you put inside it matters, but it doesn’t need to be complicated. Broad-market index funds (a total US stock market fund, a total international fund, and a bond fund) provide diversified exposure at minimal cost. Target-date funds (a single fund that adjusts its stock/bond allocation as the target retirement year approaches) are a reasonable one-fund solution. The goal is consistent, diversified investing at low cost, not stock-picking or speculation. A driver who contributes $30,000 per year to a Solo 401(k) invested in a total market index fund with a 0.03% expense ratio will accumulate significantly more wealth over 20 years than one who contributes the same amount to a high-fee managed account or chases individual stock picks.

The contribution timing is also worth thinking about for owner-operators with variable income. Trucking revenue can fluctuate sharply. A driver who has a strong first half (Q1 rates are typically higher, produce season and holiday freight push rates up in Q3 and Q4) may want to set aside money throughout the year rather than trying to fund the entire contribution in one lump sum. Some drivers set up automatic monthly transfers from their business account to their Solo 401(k). Others estimate the annual contribution during tax planning season and fund it in one or two transfers before the deadline. Either approach works. The important thing is that the money actually moves into the account.

What should I do next?

If you’re an owner-operator running without a retirement plan, the first step is deciding between a SEP IRA and a Solo 401(k). For most drivers, the Solo 401(k) is the better choice because of the higher contribution capacity at moderate income levels, the Roth option, and the loan provision. The SEP IRA makes sense if you value simplicity above all else and your income is high enough that the percentage-based contribution hits a meaningful number.

The second step is opening the account. Pick one of the major no-fee brokerages, complete the paperwork, and fund the account before the deadline. Don’t overthink the investment selection. A total market index fund is a perfectly fine starting point, and you can refine the allocation later.

The retirement planning decision connects directly to several other tax decisions in your trucking operation. Your deduction strategy determines your net income, which determines your contribution base. Your entity structure (sole prop, LLC, or S-corp) changes the contribution formula and creates the salary optimization question. The owner-operator vs company driver comparison covers retirement plan access as one of the factors in the employment-model decision, because company drivers may have access to an employer match that owner-operators have to build on their own. And your bookkeeping and record-keeping practices need to track retirement contributions, plan deadlines, and the Form 5500-EZ filing once your balance crosses the $250,000 threshold.

All of these decisions interact. The driver who optimizes deductions, chooses the right entity, sets the right salary, and funds the right retirement plan at the maximum level will end up with tens of thousands of dollars more per year in retirement savings and tax savings than the driver who handles each decision in isolation or doesn’t address them at all.

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.