{
  "meta": {
    "title": "The 9-Step Mega Backdoor Roth Strategy",
    "titleHtml": "The 9-step <em>mega backdoor Roth.</em>",
    "description": "The mega backdoor Roth can move $40,000+ per year of after-tax 401(k) contributions into Roth, on top of regular Roth limits. Nine steps unlock the strategy where the plan permits it.",
    "dek": "The mega backdoor is the largest legal Roth-funding lever for high earners. The plan must support it. Most don't; the ones that do are an opportunity.",
    "datePublished": "2026-03-19",
    "dateModified": "2026-03-19",
    "section": "Tax Strategy",
    "readMinutes": 6,
    "wordCount": 800,
    "keywords": ["mega backdoor roth", "after tax 401k", "in service withdrawal", "in plan roth conversion", "401k limit 69000", "high earner roth", "roth ladder"]
  },
  "problem": {
    "headline": "$40,000+ of additional Roth funding most high earners miss.",
    "price": "$40,000+",
    "priceLabel": "Annual Roth funding above standard limits",
    "body": "The mega backdoor Roth allows after-tax 401(k) contributions above the standard employee limit ($23,500 in 2026) to be converted to Roth. Combined with employer match, the total annual 401(k) limit ($70,000 in 2026) leaves room for substantial Roth funding the standard contribution does not capture."
  },
  "indicatorsHeading": {
    "title": "The nine steps of",
    "em": "the mega backdoor.",
    "sublede": "Each requires plan-level support. The discipline is verifying the plan permits the steps and executing in the right order each year."
  },
  "indicators": [
    {"title": "Plan permits after-tax (non-Roth) contributions", "metric": "Source: SPD", "detail": "After-tax contributions are above-the-employee-deferral and below-the-total-415-limit. Plan must explicitly permit them."},
    {"title": "Plan permits in-service distributions or in-plan Roth conversions", "metric": "Source: SPD", "detail": "Without one of these, the after-tax contributions are stuck in the 401(k) and grow tax-deferred but not tax-free."},
    {"title": "Maximum employee deferral made first", "metric": "Limit: $23,500 (2026)", "detail": "The standard employee deferral fills first. After-tax contributions stack on top, up to the 415 limit minus deferral and match."},
    {"title": "Employer match captured fully", "metric": "Pattern: full match utilization", "detail": "Employer match counts against the 415 limit but doesn't reduce mega backdoor capacity directly. Maximize the match for free money."},
    {"title": "After-tax contributions sized to fill 415 limit", "metric": "Limit: $70,000 - deferral - match", "detail": "Calculate the gap: 415 limit minus employee deferral minus employer contributions. That's the mega backdoor capacity."},
    {"title": "Conversion frequency — quarterly or more often", "metric": "Pattern: minimize earnings", "detail": "Earnings on after-tax contributions become taxable on conversion. Frequent conversion minimizes the earnings buildup."},
    {"title": "Roth IRA destination vs in-plan Roth account", "metric": "Choice: external vs internal", "detail": "In-service distribution to Roth IRA preserves more flexibility. In-plan Roth conversion keeps funds inside 401(k)."},
    {"title": "Coordination with backdoor Roth strategy", "metric": "Pattern: stack both", "detail": "Standard backdoor Roth ($7,000) and mega backdoor Roth ($40,000+) stack. High earners can fund both."},
    {"title": "Employment continuity through conversion", "metric": "Pattern: maintain plan eligibility", "detail": "In-service withdrawal requires active employment. Termination changes the mechanics; plan termination changes them again."}
  ],
  "body": [
    {
      "h2": "How the mega backdoor differs from the regular backdoor",
      "paragraphs": [
        "The standard backdoor Roth converts $7,000 per year (2026 limit) of non-deductible IRA contributions to Roth. The mega backdoor uses 401(k) plan-level after-tax contributions, which can be many times larger. The two strategies are not exclusive — high earners with eligible 401(k) plans can run both simultaneously.",
        "The 415 limit ($70,000 in 2026) is the total annual limit on all 401(k) contributions: employee deferral, employer match, employer profit-sharing, and after-tax employee. The mega backdoor capacity is the residual after the other three. For a worker maximizing employee deferral ($23,500) and receiving $5,000 of employer match, the after-tax capacity is $41,500."
      ]
    },
    {
      "h2": "Plan eligibility — the bottleneck",
      "paragraphs": [
        "Most U.S. 401(k) plans do not permit after-tax (non-Roth) employee contributions. Among those that do, fewer permit in-service distributions or in-plan Roth conversions. The combination is found primarily in larger employers with sophisticated benefits programs. Approximately 20–30 percent of large U.S. plans support the mega backdoor.",
        "The discipline is to read the Summary Plan Description carefully. The relevant sections discuss employee contribution types and distribution rules. If both after-tax contributions and in-service distributions/conversions are permitted, the strategy is available."
      ]
    },
    {
      "h2": "Conversion timing minimizes the earnings tax",
      "paragraphs": [
        "After-tax contributions grow tax-deferred until converted. Earnings on the contributions are taxable income when converted. The discipline is to convert frequently — ideally on each contribution — to minimize the earnings buildup.",
        "Some plans allow automatic in-plan Roth conversions on contribution. These are operationally ideal. Others require manual quarterly or annual conversions. The frequency directly affects the after-tax efficiency of the strategy."
      ]
    },
    {
      "h2": "Stacking mega backdoor with other strategies",
      "paragraphs": [
        "High earners can stack: standard employee deferral ($23,500), backdoor Roth IRA ($7,000), and mega backdoor Roth ($40,000+). The combined annual Roth-funding capacity exceeds $70,000. Over a 10-year career window, this represents substantial Roth wealth generation.",
        "The strategy does not require unusual income. Even moderate-income employees can use the mega backdoor if their plan permits. The benefit is asymmetric: the strategy captures the most for those with the most disposable income, but it is structurally available across the wage distribution."
      ]
    }
  ],
  "faqs": [
    {"q": "Why don't more plans support this?", "a": "Plan complexity, ADP/ACP testing concerns for highly-compensated employees, and administrative cost. Plans that support it tend to be at large employers with sophisticated benefits."},
    {"q": "Can I do this without an employer plan?", "a": "Solo 401(k)s for self-employed permit the same structure. Many Solo 401(k) custodians (Fidelity, Schwab) do not support after-tax contributions; specialized providers do."},
    {"q": "What if my plan only allows in-service distributions at age 59½?", "a": "Strategy still works at and after age 59½. For younger employees, in-plan Roth conversion (if available) achieves the same result before that age."},
    {"q": "Are the converted earnings taxed?", "a": "Yes — earnings on after-tax contributions are taxed as ordinary income when converted. Frequent conversion minimizes this tax."},
    {"q": "Will Congress close the mega backdoor?", "a": "Build Back Better proposals included closure provisions. None passed. The strategy remains legal as of 2026 but is politically vulnerable."},
    {"q": "Can I roll mega backdoor Roth IRA later?", "a": "Yes — once funds are in a Roth IRA, normal rollover and conversion rules apply."}
  ]
}