409 | 401(k), Mega Backdoor Roth, and the Premium Tax Credit

Most people worry that leaving their W-2 job means diving into a tax nightmare — but what if the opposite were true? Self-employment opens doors to retirement accounts and tax strategies that traditional employees can't access, yet fear of the unknown keeps countless would-be entrepreneurs stuck in corporate life.

Sean Mullaney — tax expert and author of Solo 401k: The Solopreneur's Retirement Account — joins Brad to break down the mechanics of self-employment taxation, retirement planning, and healthcare subsidies. Both income tax and self-employment tax come into play when you work for yourself, requiring estimated quarterly payments instead of automatic W-2 withholding. The conversation then shifts to the Solo 401k, which replicates (and often exceeds) the benefits of traditional employer-sponsored plans while giving you full control over your investment choices and higher contribution limits. The episode closes with a deep look at the Premium Tax Credit for Affordable Care Act plans, explaining how self-employed individuals and early retirees can strategically reduce their modified adjusted gross income to qualify for better subsidies — a crucial consideration for anyone seeking affordable healthcare outside of employer coverage.

Chapter Markers

• Introduction to Self-Employment and Taxation [00:00:00]
• Estimated Tax Payments Explained [00:08:11]
• Understanding the Solo 401k [00:19:51]
• Premium Tax Credit Overview [00:54:05]
• Conclusion [01:09:05]

Key Insights

• "Taxes shouldn't deter you from pursuing self-employment." [00:03:22]
• "Knowledge empowers you to leave your W-2 job without fear of taxes." [00:19:34]
• "Self-employed? You can still save effectively for retirement." [00:23:11]
• "Consider Roth conversions if you're early retired and have low income." [01:01:23]
• "Use IRS Pub 560 to help calculate your employer contributions." [00:44:01]

Related Resources

• IRS Publication 560 — Calculating employer contributions [00:44:01]
• Healthcare.gov Premium Tax Credit — Premium tax credit information [01:07:18]

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▶ Listen Next: Ep. 421 — Secure Act 2.0 Deep Dive: What Changed for Retirement Savings | Essential Listening

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