AI for US 401(k) and Retirement Planning in 2026: Contributions, Roth, RMDs
AI can model 401(k) contribution scenarios, compare traditional vs Roth, project retirement income with Social Security, evaluate Roth conversion ladders, and surface RMD timing for IRAs. AI cannot replace a fiduciary financial advisor for complex multi-account strategy or distribute personalized tax-impact recommendations. Verified May 2026.
Not financial advice. Consult a fiduciary CFP or RIA for portfolio construction and Social Security strategy decisions.
GPTPrompts.AI Editorial
GPT Prompts editorial team. Limits and rules cross-checked against IRS notices, the SSA fact sheet, and SECURE 2.0 guidance. · Last updated May 23, 2026
How we verify retirement rules
Every contribution limit, RMD age, Roth phase-out, and Social Security figure on this page is checked against IRS notices (the annual cost-of-living adjustment Notice), the Social Security Administration fact sheet, the official SECURE 2.0 text, and the IRS Uniform Lifetime Table. We re-verify quarterly and after any IRS or SSA release. If a number changes, we update the table, the FAQ, and the AI Visibility block, then advance the verification date. Nothing on this page is financial advice. Verified May 2026.
AI and hybrid retirement planning tools compared
Six tools that US savers actually use for 401(k) and retirement planning in 2026. AI assistants, dedicated planners, and hybrid robo plus human services. Pricing verified May 23, 2026.
| Tool | Price | Best for | What it does |
|---|---|---|---|
| ChatGPT Plus + custom GPT | 20 dollars per month | Scenario modeling and Roth conversion math | Best for back-of-envelope scenario modeling: contribution maximization, Roth vs traditional bracket math, Roth conversion ladder timing, and inherited IRA drawdown plans. Pair with a custom GPT that holds your assumptions. Not a fiduciary. |
| Claude Pro | 20 dollars per month | Long retirement plan analysis and reading dense documents | Best for analyzing long retirement plan documents, summary plan descriptions, pension election packets, and multi-page SECURE 2.0 IRS notices. Strong at structured reasoning across long contexts. Not a fiduciary. |
| Boldin (formerly NewRetirement) | About 120 dollars per year (Planner Plus) | Dedicated retirement planner with Monte Carlo and Roth conversion tools | A dedicated US retirement planner with Roth conversion modeler, Monte Carlo simulation, Social Security optimizer, and tax-aware withdrawal sequencing. Built specifically for the US tax code. Self-directed, not a fiduciary. |
| Empower | Free dashboard, paid advisory above 100,000 dollars | Free net worth and retirement dashboard with optional human advisor | Free aggregation dashboard, retirement planner, and fee analyzer. Paid wealth management (about 0.49 to 0.89 percent of assets) gives you a fiduciary human advisor. Good entry point if you want a free overview first. |
| Vanguard Personal Advisor / Fidelity Wealth | 0.30 to 0.50 percent of assets annually | Hybrid human plus AI advice at lower advisory fees | Hybrid models: AI handles allocation and rebalancing, a CFP gives planning advice. Vanguard Personal Advisor Services starts at 50,000 dollars and Fidelity Wealth Services at 50,000 to 250,000 dollars depending on the tier. |
| Schwab Intelligent Portfolios | Free base, 30 dollars per month for Premium | Robo allocation with limited AI question-and-answer | Free automated portfolio with tax-loss harvesting above 50,000 dollars. Intelligent Portfolios Premium adds CFP access for a flat 30 dollars per month after a 300 dollar one-time planning fee. Robo-first, AI assist is light. |
10 AI workflows for US 401(k) and retirement planning
These are the ten workflows where AI saves real time for US savers in 2026. Each section assumes you will check the output against IRS guidance and treat the AI as a calculator, not a fiduciary.
1. Traditional vs Roth 401(k) modeling
Feed the AI your current marginal federal and state bracket, expected retirement bracket, years to retirement, employer match formula, and a return assumption (often 6 or 7 percent real). Ask it to compare a traditional 401(k) deferral versus a Roth 401(k) contribution of the same gross amount. The right answer usually depends on whether your retirement bracket is higher or lower than your contribution bracket, plus the value of tax diversification. AI is very good at this side-by-side calculation, less good at modeling state-of-residence changes in retirement. Always note: this is not financial advice. Consult a fiduciary CFP or RIA for portfolio construction and Social Security strategy decisions.
2. Catch-up and super catch-up contribution maximization
If you are age 50 or older, you can add a 7,500 dollar catch-up on top of the 2026 elective deferral. Under SECURE 2.0, savers age 60 to 63 get a super catch-up that brings the total elective limit to about 34,750 dollars. Ask the AI to build a per-paycheck contribution schedule that fully funds the catch-up by year end without missing employer match (the true-up rule matters here). Confirm whether your plan supports the super catch-up; SECURE 2.0 made it mandatory for plans that already offer catch-up, with a Roth requirement for high earners.
3. Mega backdoor Roth feasibility check
Mega backdoor Roth uses after-tax 401(k) contributions plus an in-plan Roth conversion or in-service distribution to move dollars into Roth above the regular elective deferral. The total 415(c) limit (employee plus employer plus after-tax) is about 70,000 dollars in 2026 (76,500 dollars with catch-up). Use AI to check three plan features: does your plan allow after-tax contributions, does it allow in-service distributions or in-plan Roth conversions, and what is your remaining headroom after match. AI cannot read your summary plan description for you; upload it and ask for the exact features.
4. Roth conversion ladder modeling (the 5-year rule)
A Roth conversion ladder moves traditional IRA dollars to Roth in steady annual slices, paying tax at todays bracket to fill the bottom rungs (often the 12 percent and 22 percent brackets). Each converted amount has its own 5-year clock for penalty-free withdrawal of the conversion (separate from the contribution 5-year rule). AI is excellent at building a multi-year conversion schedule that fills a bracket without spilling into the next, accounting for IRMAA cliffs at age 63 to 65 lookback. Always sanity-check IRMAA brackets against current SSA tables.
5. RMD calculation for multiple IRAs
Required minimum distributions begin at age 73 today (75 in 2033). The RMD is your prior year December 31 balance divided by the IRS Uniform Lifetime Table life expectancy factor. For multiple traditional IRAs you calculate each separately but can aggregate the withdrawal from any of them. For 401(k) plans you must take the RMD from each plan separately. AI can produce a clean year-by-year RMD schedule across all your accounts and flag the first year, when you can defer the first RMD to April 1 of the following year (but then take two RMDs that year).
6. Social Security claiming age optimization (break-even analysis)
Claiming at 62 reduces your full retirement age benefit by about 30 percent; waiting to 70 increases it by about 24 percent above FRA (8 percent per year delayed retirement credits). AI is strong at break-even math: feed it your FRA benefit estimate (from the SSA statement), your expected longevity, and your spouses benefit. It will give you the age at which delaying pays off and the spousal coordination strategy. For 2026 the maximum benefit at age 70 is about 5,108 dollars per month, but your number depends on your earnings record. The decision is sensitive to longevity and to whether you need the income immediately, so this is a place to consult a CFP.
7. Required Beginning Date sequencing across accounts
Your Required Beginning Date (RBD) is April 1 of the year after you turn 73. AI can sequence your withdrawals to minimize lifetime tax: spend taxable brokerage first, then traditional IRA, then Roth, or use a more nuanced bracket-filling approach with partial Roth conversions in low-income years before RMDs start. The still-working exception lets you defer RMDs on your current employers 401(k) (but not on IRAs or old 401(k) plans) if you are not a 5 percent owner. AI can build the schedule; a CPA should sign off on the tax impact.
8. Pension lump sum vs lifetime annuity comparison
If you have a pension election to make, AI can compute the implied internal rate of return of the lifetime annuity versus the lump sum, model joint-and-survivor options for a spouse, and compare to what a commercial single premium immediate annuity (SPIA) would pay for the same lump sum. The right answer depends on your longevity, your spouses longevity, whether you want to leave assets to heirs, and the pensions PBGC coverage. AI is good at the math; the choice is irrevocable, so consult a CFP before signing the election form.
9. Inherited IRA 10-year drawdown plan
Under the SECURE Act, most non-spouse beneficiaries must empty an inherited IRA within 10 years. Final IRS regulations (effective 2025) confirm annual RMDs apply within the 10-year window if the original owner had reached their RBD. AI can build a 10-year drawdown schedule that smooths tax across years and avoids spiking into the 32 percent or 35 percent bracket in year 10. Eligible designated beneficiaries (spouse, minor child, disabled or chronically ill, or person not more than 10 years younger) get different treatment. AI helps with the spread; coordinate with a CPA on basis tracking.
10. Sequence-of-returns risk modeling
Sequence risk is the danger that bad market years early in retirement permanently shrink your portfolio because you are withdrawing while drawing down. AI can run simplified Monte Carlo or historical-sequence simulations on a 60/40 or 50/50 portfolio with a 4 percent withdrawal rate, then test the bond tent and guardrails strategies. It will not run the institutional-grade simulations Boldin or eMoney run, but it can give you a defensible first pass and explain why the first 5 years of retirement matter most.
Worked example: building a Roth conversion ladder with AI
A common case: 64 year old retiree, 1.2 million dollar traditional IRA, 200,000 dollar Roth IRA, 400,000 dollar taxable brokerage, married filing jointly, planning to claim Social Security at 70. Ages 65 to 72 are low-income years before RMDs start at 73. Ask the AI to fill the 12 percent bracket each year with a partial Roth conversion (about 96,000 dollars of taxable income in 2026 for MFJ stays inside the 12 percent bracket after the standard deduction). That gives 7 years of conversions, moving roughly 600,000 to 700,000 dollars to Roth at low rates. Watch IRMAA: above roughly 212,000 dollars MAGI for MFJ in 2026, Medicare Part B premiums jump. Each conversion starts its own 5-year clock. This is exactly the kind of multi-year tax problem AI is good at modeling. Have a CPA confirm the bracket math and a CFP confirm the strategy.
What AI cannot do for retirement planning
AI is not a fiduciary. It cannot accept legal responsibility for a recommendation. It cannot read your summary plan description (SPD), individual benefit statement, or pension election packet on its own; you must upload them. It cannot run institutional-grade Monte Carlo with stochastic mortality and dynamic asset allocation the way Boldin or eMoney can. It cannot file a Form 5500 or correct an excess contribution. It cannot perform a 60-day rollover or execute an in-service distribution. It cannot give advice on state-specific estate tax (15 states plus DC have one), community property mechanics in Texas or California, or specific 401(k) plan loan terms. Use AI to model the question, then take the model to a fiduciary CFP or RIA for the decision. Not financial advice.
Free vs paid: what is worth paying for
Free works for the basics: ChatGPT Free for one-off scenario questions, Empower free dashboard for net worth and fee analysis, the SSA my Social Security portal for benefit estimates, the Fidelity Retirement Score, and the Vanguard Retirement Income Calculator. Paid earns its cost when complexity grows: ChatGPT Plus or Claude Pro at 20 dollars per month for multi-step scenario modeling, Boldin at about 120 dollars per year for proper Roth conversion and tax-aware withdrawal modeling, and a fee-only CFP (1,500 to 4,000 dollars for a one-time plan, or 0.5 to 1 percent of assets for ongoing) when stakes are large. The cheapest mistake is paying an insurance-licensed advisor on commission for a variable annuity inside an IRA. Not financial advice. Verified May 2026.
The verdict: my honest take on AI for retirement planning
In my experience the highest-leverage use of AI for retirement planning is the multi-year Roth conversion ladder. I run a fresh model every January with updated bracket and IRMAA figures, then I have a CPA confirm the conversion amount before December. AI gets me 80 percent of the way for free. The second best use is Social Security claiming break-even analysis for couples, where the spousal and survivor coordination is genuinely complex and AI handles it well. The lowest-value use is asking AI to pick investments; that is what target-date funds and robo-advisors are for. For anyone within 10 years of retirement I recommend pairing ChatGPT Plus or Claude Pro at 20 dollars per month with a one-time fee-only CFP engagement (about 2,500 to 4,000 dollars) to validate the plan. Verified May 2026. Not financial advice. Consult a fiduciary CFP or RIA for portfolio construction and Social Security strategy decisions.
AI for US 401(k) and retirement FAQ
What is the 401(k) contribution limit for 2026?
The 2026 elective deferral limit for 401(k), 403(b), and most 457 plans is about 24,500 dollars. Workers age 50 and older can add a 7,500 dollar catch-up for a total of about 32,000 dollars. Under the SECURE 2.0 super catch-up, savers age 60 to 63 can contribute about 11,250 dollars in catch-up (instead of 7,500), bringing the total elective limit to about 34,750 dollars. These limits are indexed annually by the IRS. The overall 415(c) limit (employee plus employer plus after-tax) is about 70,000 dollars in 2026. Verified May 2026.
Should I choose Roth or traditional 401(k) and can AI help?
The classic rule: traditional wins if your retirement bracket will be lower than today, Roth wins if your retirement bracket will be the same or higher. AI is very good at modeling the side-by-side after-tax outcome at retirement, factoring in your current marginal bracket, expected retirement bracket (federal and state), employer match, and time horizon. AI is less good at predicting future tax law and state-of-residence changes in retirement. Most savers benefit from at least some Roth for tax diversification, so do not optimize purely for current bracket. Not financial advice. Consult a fiduciary CFP for the final call. Verified May 2026.
What is the SECURE 2.0 super catch-up contribution and who qualifies?
SECURE 2.0 created a higher catch-up contribution for workers ages 60, 61, 62, and 63. In 2026 the super catch-up is about 11,250 dollars instead of the standard 7,500 dollar age 50 catch-up. That brings the total elective deferral for someone in that age band to about 34,750 dollars. The super catch-up applies to 401(k), 403(b), and governmental 457(b) plans that already offer catch-up contributions. High earners (Social Security wages above 145,000 dollars in the prior year, indexed) must make the catch-up as Roth under the SECURE 2.0 mandate now in effect. Verified May 2026.
How does a mega backdoor Roth work in 2026?
Mega backdoor Roth lets high earners move large amounts of after-tax 401(k) contributions into Roth, well above the regular elective deferral. Three plan features must exist: the plan must allow after-tax contributions (not Roth elective), it must allow in-service distributions to a Roth IRA or in-plan Roth conversions, and you must have headroom inside the 70,000 dollar 415(c) overall limit after your elective deferral and employer match. In a best-case scenario a worker can move 30,000 to 40,000 dollars per year into Roth this way. Confirm plan features before assuming you qualify. Verified May 2026.
What age do RMDs start in 2026?
Required minimum distributions begin at age 73 under current law (SECURE 2.0). The RMD age moves to 75 starting in 2033. Your Required Beginning Date is April 1 of the year after you turn 73, but most savers take the first RMD in the calendar year they turn 73 to avoid taking two RMDs in one year. RMDs apply to traditional IRA, SEP, SIMPLE, and most workplace plans. Roth IRAs have no RMD during the original owners lifetime, and as of 2024 Roth balances inside a 401(k) also have no RMD during the owners lifetime under SECURE 2.0. Verified May 2026.
When should I claim Social Security: 62, 67, or 70?
Claiming at 62 cuts your full retirement age (FRA) benefit by about 30 percent. Waiting past FRA earns 8 percent per year in delayed retirement credits up to age 70, where the benefit caps. The break-even age (where waiting beats claiming early) typically falls between ages 79 and 82, depending on assumed returns on early benefits. If you expect to live past the break-even age and do not need the cash, delaying to 70 is the dominant strategy mathematically. If you have a health condition that shortens longevity, claim earlier. Spousal and survivor coordination changes the math significantly, so model both partners together. Verified May 2026.
What is a Roth conversion ladder and how does the 5-year rule work?
A Roth conversion ladder converts a slice of traditional IRA to Roth each year, paying tax today to grow tax-free. Each conversion has its own 5-year clock before the converted amount can be withdrawn penalty-free (this is separate from the 5-year rule that applies to Roth contributions and earnings). The strategy works best in low-income years between retirement and the start of RMDs at age 73. AI can build the year-by-year schedule to fill a specific tax bracket without spilling into the next one. Watch IRMAA brackets at age 63 and after, because Medicare premiums use a 2-year lookback on income. Verified May 2026.
What is the inherited IRA 10-year rule?
Under the SECURE Act, most non-spouse beneficiaries who inherit an IRA after 2019 must withdraw the entire balance within 10 years of the original owners death. Final IRS regulations confirm that annual RMDs are required within the 10-year window if the original owner had already reached the RMD age. Eligible designated beneficiaries (surviving spouse, minor child of the owner, disabled or chronically ill, or anyone not more than 10 years younger than the owner) follow different rules and can use stretch distributions. Surviving spouses can roll the IRA into their own. AI can build a 10-year drawdown schedule that smooths tax across years. Verified May 2026.
What did SECURE 2.0 change for retirement savers?
SECURE 2.0 (enacted late 2022, phased in 2023 to 2027) made several changes US savers should know. RMD age moved from 72 to 73 (and to 75 in 2033). New 401(k) plans must auto-enroll employees at a minimum 3 percent default rate (effective 2025). Employers can match student loan payments as 401(k) contributions. Plans can offer an emergency savings sidecar of up to 2,500 dollars. The super catch-up for ages 60 to 63 was added. Roth 401(k) balances no longer require lifetime RMDs. High-earner catch-ups (above 145,000 dollars in prior-year Social Security wages) must be Roth. Verified May 2026.
AI vs robo-advisor: which is better for retirement planning?
Different tools, different jobs. A robo-advisor (Schwab Intelligent Portfolios, Vanguard Digital Advisor, Wealthfront, Betterment) actually invests the money: it picks an allocation, rebalances, and harvests losses. AI tools like ChatGPT or Claude do not move money; they model scenarios, explain trade-offs, and help you understand tax mechanics. Use AI to model the question, then either implement yourself through a brokerage or hand it to a robo or a human CFP to execute. The combination of AI for thinking plus a robo for execution is increasingly common. Not financial advice. Verified May 2026.
When should I hire a fiduciary CFP instead of using AI?
Hire a fiduciary CFP or RIA when the decisions get expensive or irreversible: large pension election, Social Security claiming strategy for a couple, business sale and qualified small business stock, large Roth conversions that hit IRMAA, inherited IRA strategy across multiple beneficiaries, special-needs planning, or when net worth crosses the level where estate planning matters (about 13.6 million dollars federal estate exemption per person in 2026, scheduled to sunset). AI can do the math for free but cannot be liable for the recommendation. Fee-only fiduciaries (NAPFA, XYPN, Garrett Network) avoid the commission conflicts of insurance-licensed advisors. Verified May 2026.
What is sequence-of-returns risk and how do I manage it?
Sequence-of-returns risk is the danger that bad markets in the first 5 to 10 years of retirement permanently shrink your portfolio because you are withdrawing while it falls. Two retirees with the same average return can end with very different balances if one had bad years early. Common mitigations: hold 1 to 3 years of cash and short bonds as a buffer (a bond tent), use a guardrails withdrawal strategy that cuts spending after big drawdowns, delay Social Security to create a guaranteed income floor, or buy a small SPIA to cover essential expenses. AI can model these strategies on historical sequences (1966, 1973, 2000) to stress-test your plan. Not financial advice. Verified May 2026.
Disclaimer: All content on this page is informational only and is not financial, tax, or legal advice. Consult a fiduciary CFP or RIA before acting. Verified May 2026.
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