{ "presentation": "complete-card", "format_version": 3, "overview": "A mega backdoor Roth moves a workplace plan’s separate after-tax contributions into a Roth retirement account. People use it to save more for retirement beyond their ordinary 401(k) deferrals. It requires specific employer-plan features; a Roth option alone is not enough.", "overview_sources": "Fidelity · 2026", "overview_source_ids": [ "money59-mega-backdoor-roth-fidelity-mega" ], "sections": [ { "role": "explanation", "title": "The contribution, then the Roth move", "items": [ { "label": "There are three different contribution types.", "text": "Ordinary pre-tax deferrals postpone income tax; ordinary Roth deferrals pay it now. Both use the employee deferral limit. Separate non-Roth after-tax contributions use already-taxed pay, but their earnings are pretax money. Those separate contributions are the starting point here.", "source": "Fidelity · 2026", "source_ids": [ "money59-mega-backdoor-roth-fidelity-aftertax" ] }, { "label": "Confirm both the contribution and an available Roth route.", "text": "The summary plan description explains the features. Ask the administrator whether separate after-tax contributions are allowed, then whether they can move to Roth inside the plan or through a rollover while still employed. Either route can work. Setup involves payroll elections, conversion instructions, and checking that the first transfer occurred.", "source": "Fidelity · 2026", "source_ids": [ "money59-mega-backdoor-roth-fidelity-mega" ] }, { "label": "U.S. 2026 limits: $24,500 deferrals; $72,000 total additions.", "text": "Qualifying catch-up deferrals are separate from that total: $8,000 at age 50 or older, or $11,250 at ages 60–63, if permitted.", "source": "IRS · 2026 limits", "source_ids": [ "money59-mega-backdoor-roth-notice2026" ] }, { "label": "Employer money reduces the available after-tax room.", "text": "For an illustrative under-50 employee with sufficient compensation, $24,500 of deferrals and $10,000 from the employer leave $37,500 under the $72,000 ceiling. Count other employer additions and allocated forfeitures too. The total cannot exceed 100% of compensation, and the plan can set a lower limit.", "source": "IRS · annual-additions rules", "source_ids": [ "money59-mega-backdoor-roth-additions" ] }, { "label": "Already-taxed principal and untaxed earnings need different treatment.", "text": "A rollover distribution generally carries proportional pretax and after-tax amounts. A permitted split can send after-tax principal to a Roth IRA and pretax earnings to a traditional IRA, deferring tax on those earnings. Sending earnings to Roth instead makes them taxable. The administrator must identify the amounts and destinations; requesting only the principal does not remove the allocation rules.", "source": "IRS · after-tax rollovers", "source_ids": [ "money59-mega-backdoor-roth-aftertax-rollovers" ] }, { "label": "The deposit and its growth can go to different tax destinations.", "text": "Illustration: a permitted full distribution of an after-tax source contains $10,000 of contributions and $300 of earnings. If the plan correctly directs the $10,000 to a Roth IRA and $300 to a traditional IRA, the earnings remain tax-deferred. Sending the entire $10,300 to Roth instead brings the $300 of earnings into income. This assumes those are the administrator-confirmed amounts for the distribution. The $300 traditional IRA destination can also affect a separate backdoor Roth calculation later that year.", "source": "Illustration · context: Internal Revenue Service", "source_ids": [ "money59-mega-backdoor-roth-aftertax-rollovers" ], "provenance": "original-illustration" } ] }, { "role": "benefits", "title": "Why people use it", "items": [ { "label": "More savings can receive Roth treatment.", "text": "The rollover is separate from an ordinary IRA contribution, so its size is not restricted to the IRA contribution allowance. Available workplace contribution room still controls what can go in.", "source": "Fidelity · 2026", "source_ids": [ "money59-mega-backdoor-roth-fidelity-mega" ] }, { "label": "Later Roth earnings can be withdrawn tax-free.", "text": "That requires a qualifying withdrawal. In a Roth workplace account, the usual conditions are five tax years plus age 59½; death or disability can also qualify. This tax treatment does not guarantee investment gains.", "source": "IRS · Roth account rules", "source_ids": [ "money59-mega-backdoor-roth-roth-account" ] } ] }, { "role": "cautions", "title": "Good to know", "items": [ { "label": "Converting does not unlock the money for spending.", "text": "Plan withdrawal restrictions still matter. Early withdrawals can trigger tax or penalties, and Roth 401(k) and Roth IRA withdrawal rules differ. Check conversion frequency, transaction charges, investment fees, and access before choosing a destination.", "source": "IRS · in-plan Roth rules", "source_ids": [ "money59-mega-backdoor-roth-inplan" ] }, { "label": "Plan testing can reduce what highly paid employees keep.", "text": "After-tax contributions enter the ACP nondiscrimination test, which compares employee groups’ contributions. Where testing applies, a failed test can require refunds or other corrections even below the individual dollar ceiling.", "source": "IRS · ACP testing", "source_ids": [ "money59-mega-backdoor-roth-acp" ] }, { "label": "An IRA destination affects the other backdoor.", "text": "Pre-tax earnings rolled into traditional, SEP or SIMPLE IRAs enter the year-end pro-rata calculation for regular backdoor Roth conversions. Workplace rollovers follow different rules.", "source": "IRS · Form 8606, 2025 instructions", "source_ids": [ "money59-mega-backdoor-roth-8606" ] } ] }, { "role": "community", "title": "From community discussion", "items": [ { "label": "Automatic payday conversions saved repeated phone calls.", "text": "Bogleheads commenters described one call to activate ongoing in-plan conversions; another converted manually each payday. Participants weighing an IRA rollover mentioned repeated security questions and advisor offers during calls. Convenient automation meant keeping the money in the Roth 401(k).", "source": "Community · Reddit r/Bogleheads", "source_ids": [ "money59-mega-backdoor-roth-reddit-fidelity" ] }, { "label": "Quarterly IRA rollovers came with a separate earnings destination.", "text": "One participant called quarterly, sending principal to a Roth IRA and gains to a traditional IRA, which they later converted. The poster also asked about a different fund mix to reduce pre-conversion earnings; that feature was not established. A reply’s expectation of small quarterly gains was not a guarantee.", "source": "Community · Reddit r/Bogleheads", "source_ids": [ "money59-mega-backdoor-roth-reddit-fidelity" ] }, { "label": "A $20 rollover charge changed the comparison.", "text": "A personalfinance poster reported quarterly IRA rollovers costing $20 each, versus free automatic in-plan conversions. Replies weighed the plan’s fund choices and withdrawal access. That was one reported fee arrangement, not a current fee schedule for every plan.", "source": "Community · Reddit r/personalfinance", "source_ids": [ "money59-mega-backdoor-roth-reddit-fees" ] }, { "label": "An assumed automatic conversion left money waiting for months.", "text": "A Fire commenter said they owed some tax after discovering conversions were not automatic at their employer. They later called to activate payday conversions. The delay illustrates why a payroll deduction and a completed Roth move are separate checks; the report did not quantify the tax.", "source": "Community · Reddit r/Fire", "source_ids": [ "money59-mega-backdoor-roth-reddit-delay" ] }, { "label": "Spreadsheets tracked balances; Form 1099-R caused anxiety.", "text": "Reports describe spreadsheets separating pre-tax, Roth and non-Roth after-tax money, monthly conversion reminders, and anxiety about the first Form 1099-R. They discuss checking conversion records against the form and involving a tax professional for a large conversion year; receiving the form alone did not mean failure.", "source": "Community", "provenance": "preserved-community-record" }, { "label": "A new job sometimes removed the feature entirely.", "text": "Reports describe rereading plan documents after a job change and at enrollment. Some stopped when the new plan lacked a Roth route, or waited for a permitted rollover event. Others used a taxable brokerage or regular IRA backdoor instead; those alternatives have their own tax and eligibility rules.", "source": "Community", "provenance": "preserved-community-record" }, { "label": "Extra Roth saving was optional even in a high-income year.", "text": "Reports prioritized the match and ordinary retirement saving without diverting rent or emergency cash. Some used this feature only when cash was comfortably available. Their ordering was a budgeting preference, not a rule requiring everyone to max other accounts first.", "source": "Community", "provenance": "preserved-community-record" } ] } ], "related": [ "backdoor-roth", "the-match", "roth-vs-traditional", "taxable-brokerage", "four-oh-one-k-rollover" ] }