When most people think about saving for retirement, they think of 401(k) and IRA. Maybe a Roth IRA if they’ve done some research. But the tax code offers a surprising number of retirement savings vehicles that fly under the radar — and some of them come with contribution limits and tax advantages that dwarf what a standard 401(k) can offer.
Here are seven retirement accounts that could dramatically change your savings trajectory if you qualify for them.
1. The Solo 401(k) With Mega Backdoor Roth
If you have any self-employment income — even a side gig — a solo 401(k) is one of the most powerful retirement tools available. You can contribute up to $23,500 as the employee, plus up to 25% of net self-employment income as the employer, for a combined maximum of $69,000 in 2026.
But the real power move is the mega backdoor, Roth. Some solo 401(k) providers allow after-tax contributions up to the $69,000 cap, which you can then immediately convert to Roth. This strategy lets high earners who are normally phased out of Roth IRA contributions contribute to a Roth account through the back door. You can also check Vanguard’s Roth IRA income limits to understand phase-out thresholds.
Not every plan provider supports this feature, so check before you open an account. Providers like Fidelity and Schwab offer solo 401(k) plans that accommodate this strategy.
2. The Health Savings Account as a Stealth Retirement Fund
The HSA is technically a health care account, but it’s arguably the most tax-advantaged retirement vehicle in the entire tax code. It’s the only account that offers a triple tax benefit: contributions are tax-deductible, growth is tax-free, and withdrawals for qualified medical expenses are tax-free. Learn how to maximize your HSA as a retirement strategy in 2026.
In 2026, you can contribute $4,300 for individual coverage or $8,750 for family coverage. If you’re 55 or older, add another $1,000 in catch-up contributions.
The retirement strategy is to pay current medical expenses out of pocket, let the HSA grow and invest for decades, and then use it tax-free in retirement when healthcare costs are highest. After age 65, you can withdraw HSA funds for any purpose — you’ll just pay income tax on non-medical withdrawals, making it function like a traditional IRA at that point.
3. The Cash Balance Pension Plan
This is the account that high earners don’t know about, and it might be the biggest missed opportunity in retirement planning. A cash balance plan is a type of defined benefit pension that you set up for your own business. The contribution limits are dramatically higher than any other retirement account — often $150,000 to $300,000 per year or more, depending on your age.
The older you are, the more you can contribute, because the plan is designed to fund a specific retirement benefit. A 55-year-old business owner could potentially shelter $250,000 or more annually, all tax-deductible.
The catch is that cash balance plans require actuarial administration, which costs $2,000 to $4,000 per year. But for business owners with high income, the tax savings far outweigh the administrative costs. A cash balance plan can be layered on top of a 401(k) for even greater savings.
4. The SEP IRA
The Simplified Employee Pension IRA allows self-employed individuals and small business owners to contribute up to 25% of net self-employment income, with a maximum of $69,000 in 2026. It’s simpler to set up and maintain than a solo 401(k), with no annual filing requirements.
The main limitation compared to a solo 401(k) is that SEP IRAs don’t offer an employee deferral component, so your contribution is limited to the 25% employer calculation. For freelancers with moderate income, this means lower total contributions. But for high earners who want simplicity, the SEP IRA is hard to beat.
One important caveat: if you have employees, you must contribute the same percentage for them as you do for yourself. This makes the SEP less attractive for businesses with staff.
5. The SIMPLE IRA
The Savings Incentive Match Plan for Employees is designed for small businesses with 100 or fewer employees. In 2026, employees can defer up to $16,500, with a $3,500 catch-up contribution for those 50 and older. Learn about the new catch-up contribution rules for 2026. The employer must either match contributions up to 3% of compensation or make a 2% non-elective contribution for all eligible employees.
The SIMPLE IRA occupies a middle ground between the SEP and the 401(k). It has lower contribution limits than either, but it’s significantly cheaper and easier to administer than a 401(k). For very small businesses that want to offer a retirement benefit without the complexity of a full 401(k) plan, it fills an important niche.
6. The 457(b) Deferred Compensation Plan
If you work for a state or local government, a hospital, or certain nonprofits, you may have access to a 457(b) plan. The contribution limit is $23,500 in 2026 — the same as a 401(k). But here’s what makes the 457(b) special: it’s not subject to the 10% early withdrawal penalty.
If you leave your employer at any age, you can access your 457(b) funds without penalty. For people planning early retirement or career transitions, this is a significant advantage over a 401(k) or 403(b), where early withdrawals before age 59½ trigger a penalty.
Even better, if your employer offers both a 403(b) and a 457(b), you can max out both — effectively doubling your annual tax-advantaged savings to $47,000.
7. The SECURE 2.0 Starter 401(k)
Starting in 2024, the SECURE 2.0 Act created a new simplified 401(k) option for businesses that don’t currently offer any retirement plan. The starter 401(k) requires no employer contributions and has a contribution limit tied to the IRA limit ($7,000 in 2026, plus $1,000 catch-up).
While the contribution limit is modest, the starter 401(k) addresses a real problem: millions of small-business employees have no access to workplace retirement savings. If your employer just started offering one, it’s worth participating — especially if it includes auto-enrollment and auto-escalation features mandated by SECURE 2.0.
Which Account Is Right for You?
The answer depends on your employment situation, income level, and time horizon. For most W-2 employees, maximizing contributions to a 401(k) and an HSA is the foundation. Self-employed individuals should explore a solo 401(k) or SEP IRA based on their income level and level of complexity desired. Learn about common retirement planning myths that could cost you thousands. High earners with business income should seriously evaluate a cash balance plan — the tax savings can be transformative.
The common thread is that each of these accounts offers tax advantages that compound significantly over time. Check the IRS announcement for 2026 contribution limits. Review BLS data on retirement plan access. The earlier you discover and use them, the more powerful they become.
