Choosing between a 401(k) and an IRA — or more precisely, deciding how to allocate contributions across both — is one of the most consequential financial decisions American workers make each year. As a CFP with more than 14 years of experience optimizing retirement savings for clients across income brackets, I have seen how a well-structured account funding order can add $200,000 to $500,000 to lifetime wealth compared to a haphazard approach. This guide provides a comprehensive comparison of 401(k)s and IRAs across every dimension that matters: contribution limits, employer benefits, investment options, fees, withdrawal rules, RMDs, loans, and tax treatment. We will also cover Roth variants, the optimal funding order, rollover rules, and decision frameworks for common situations. By the end, you will know exactly which dollars belong in which account and why.
The Core Difference: 401(k) vs IRA at a Glance
A 401(k) is an employer-sponsored retirement plan that allows employee salary-deferral contributions, often with an employer match, while an IRA is an individual retirement account you open and fund on your own. The 401(k) typically offers higher contribution limits, the potential for an employer match, and plan-imposed investment menus, while the IRA offers unlimited investment choice, lower fees at most brokers, and more flexible withdrawal rules. Most working Americans should use both rather than choosing between them, with the order of contributions optimized to capture maximum tax advantages and employer benefits. The table below summarizes the key differences across every dimension that matters for retirement planning.
| Feature | 401(k) | IRA (Traditional / Roth) |
|---|---|---|
| 2024 Contribution Limit | $23,000 | $7,000 |
| Catch-Up (Age 50+) | $7,500 | $1,000 |
| Total with Catch-Up | $30,500 | $8,000 |
| Employer Match | Common (50% to 100%) | Not available |
| Investment Options | Plan menu (15-30 funds) | Unlimited (stocks, ETFs, mutual funds) |
| Average Fees | 0.50%-1.50% (plan-dependent) | 0.03%-0.15% at low-cost brokers |
| Loans Allowed | Yes (up to 50% / $50,000) | No |
| Required Minimum Distributions | Age 73 (traditional) | Age 73 (traditional); none (Roth) |
| Early Withdrawal Penalty | 10% before 59½ (some exceptions) | 10% before 59½ (more exceptions) |
| Income Limits for Contributions | None (must have employer) | Roth: $161k/$240k; Traditional deductible: phase-outs |
2024 Contribution Limits: Know Your Tax-Advantaged Capacity
The IRS adjusts contribution limits for inflation most years, and 2024 brought meaningful increases across account types. Workers aged 50 and over qualify for catch-up contributions, which significantly expand tax-advantaged savings space in the high-earning years just before retirement. SEP IRAs and Solo 401(k)s offer much larger contribution limits for self-employed individuals because they include both employee and employer contribution components. Knowing your available capacity across all account types lets you optimize tax savings and avoid leaving tax-advantaged space unused at year-end.
| Account Type | 2024 Employee Limit | Catch-Up (50+) | Employer/Total Limit | Notes |
|---|---|---|---|---|
| 401(k) / 403(b) | $23,000 | $7,500 | $69,000 ($76,500 with catch-up) | Most common employer plan |
| Traditional / Roth IRA | $7,000 | $1,000 | $7,000 ($8,000 with catch-up) | Income limits apply to Roth and deductible Traditional |
| SEP IRA | — | — | $69,000 or 25% of compensation | Self-employed and small business |
| SIMPLE IRA | $16,000 | $3,500 | Varies with match | Small businesses (≤100 employees) |
| Solo 401(k) | $23,000 | $7,500 | $69,000 ($76,500 with catch-up) | Sole proprietors and one-person businesses |
| HSA (self / family) | $4,150 / $8,300 | $1,000 | — | Triple tax advantage if invested |
| 457(b) Governmental | $23,000 | $7,500 | $23,000 ($30,500 with catch-up) | State/local government and nonprofits |
Traditional vs Roth: The Tax Decision Framework
Both 401(k)s and IRAs offer traditional (pre-tax) and Roth (after-tax) variants, and choosing between them is one of the most impactful decisions in retirement planning. The fundamental question is whether your marginal tax rate today is higher or lower than your expected marginal tax rate in retirement. If you expect to be in a lower tax bracket in retirement, choose traditional and take the deduction now. If you expect to be in a higher bracket — common for young workers early in their careers, those with large traditional 401(k) balances, or those expecting significant pension income — choose Roth. Most workers benefit from holding both types for tax diversification, rather than going all-in on one.
| Your Situation | Recommended Choice | Rationale |
|---|---|---|
| Current bracket: 12% or below | Roth | Lock in low taxes now; expect higher bracket later |
| Current bracket: 22%, early career | Roth | Time + bracket growth favors Roth |
| Current bracket: 22%, mid-career | Mix (50/50) | Hedge against unknown future tax rates |
| Current bracket: 24%+ | Traditional | Large deduction now; expect lower retirement bracket |
| Current bracket: 32%+ | Traditional (401k) + Backdoor Roth (IRA) | Maximize deduction; Roth IRA via backdoor |
| Near retirement, low expected bracket | Traditional | Capture deduction at peak earnings |
| Near retirement, high expected bracket | Roth | Avoid RMDs pushing you into higher bracket |
Michael, a software engineer earning $95,000 in his second year post-college, had been contributing to a traditional 401(k) by default. After analyzing his situation, I recommended switching to Roth 401(k) contributions for three reasons: his current marginal rate was 22% (relatively low historically), his career trajectory would likely push him into the 32% bracket within five years, and he had decades of tax-free growth ahead. By contributing $15,000 per year to Roth 401(k), Michael forgoes a $3,300 annual tax deduction but locks in tax-free growth on contributions that, at 8% returns, will become roughly $440,000 by age 65 — all tax-free. The decision cost him current deductions but is projected to save him $130,000+ in retirement taxes.
The Optimal Funding Order: Where to Direct Each Dollar
Once you understand the account types and traditional vs Roth choice, the next question is the order in which to fund accounts. The order below maximizes employer benefits first (free money), then tax-advantaged space with broad investment choice, then large tax-deferred capacity, and finally taxable space. Work your way down the list, fully funding each tier before moving to the next. Following this order religiously is the single most reliable way to add six figures to your lifetime retirement wealth without increasing your total savings rate.
| Priority | Account | 2024 Amount | Why This Order |
|---|---|---|---|
| 1 | 401(k) to employer match | Up to 6% of salary (typical) | 50% to 100% immediate return |
| 2 | HSA (if eligible, invested) | $4,150 / $8,300 | Triple tax advantage, no FICA on growth |
| 3 | Roth or Traditional IRA | $7,000 / $8,000 (50+) | Broader investment options, lower fees |
| 4 | 401(k) to annual max | $23,000 / $30,500 (50+) | Large tax-deferred capacity |
| 5 | Mega Backdoor Roth (if offered) | Up to $46,000 additional | Massive Roth space if plan allows |
| 6 | Taxable brokerage | Unlimited | Flexibility, tax-loss harvesting |
| 7 | 529 college plan | Varies by state | Tax-free growth for education |
Investment Options and Fees: Where IRA Often Wins
One of the most significant differences between 401(k)s and IRAs is the investment menu and the associated fees. A typical 401(k) offers 15 to 30 funds selected by the employer, often including higher-cost actively managed options and institutional share classes with relatively high minimums. An IRA at a low-cost broker like Vanguard, Fidelity, or Schwab offers access to thousands of ETFs and mutual funds, including ultra-low-cost index funds with expense ratios as low as 0.03%. The difference matters: a 1% annual fee on a $100,000 balance growing at 8% over 30 years costs the investor approximately $90,000 in lost growth. Use the lowest-cost funds available in your 401(k), and supplement with an IRA for access to broader low-cost options.
| Investment Vehicle | 401(k) Typical Cost | IRA Typical Cost | Difference Per $100k |
|---|---|---|---|
| S&P 500 Index Fund | 0.20%-0.50% | 0.03% (VFIAX, FXAIX, SWPPX) | $170-$470/year |
| Target-Date Fund | 0.45%-0.85% | 0.08%-0.15% (Vanguard) | $300-$700/year |
| Actively Managed U.S. Equity | 0.75%-1.25% | 0.50%-0.90% | $250-$350/year |
| Bond Fund | 0.30%-0.60% | 0.03%-0.15% (VBTLX, etc.) | $150-$450/year |
| Plan Administrative Fee | 0.10%-0.50% | $0 | $100-$500/year |
Karen, age 47, had been contributing 8% to her 401(k) — enough to capture the full employer match — but the plan's lowest-cost fund had a 0.78% expense ratio plus a 0.35% plan administrative fee. Her $180,000 balance was paying approximately $2,000 per year in fees. I had Karen keep her 401(k) contribution at the 6% match level, then open a Roth IRA at Vanguard and direct her additional 2% (plus the savings from her raise) to VTI and VXUS at a blended 0.05% expense ratio. By age 65, the IRA portion alone was projected to grow to roughly $410,000, with approximately $90,000 in fee savings compared to keeping the same dollars in the 401(k). Karen's case illustrates how the IRA's lower-fee structure complements the 401(k) rather than replacing it.
Withdrawal Rules: Penalties, Exceptions, and Access
Both 401(k)s and IRAs impose a 10% early withdrawal penalty on distributions taken before age 59½, but the exceptions differ between the two account types and create meaningful planning flexibility. IRAs offer more penalty exceptions, including first-time home purchase ($10,000 lifetime), qualified higher education expenses, certain medical expenses, and substantially equal periodic payments (SEPP/72(t)). 401(k)s have fewer exceptions but offer the Rule of 55, which allows penalty-free withdrawals from your current employer's plan if you leave your job at age 55 or later. Roth accounts have unique rules: contributions (but not earnings) can be withdrawn tax- and penalty-free at any time, making Roth IRAs particularly flexible for early retirees.
| Withdrawal Scenario | 401(k) Penalty? | Traditional IRA Penalty? | Roth IRA Penalty? |
|---|---|---|---|
| After age 59½ | No | No | No |
| Before 59½, general | 10% penalty + tax | 10% penalty + tax | Contributions: none; Earnings: 10% + tax |
| Rule of 55 (separate service) | No (current employer only) | N/A | N/A |
| First-time home purchase ($10k) | 10% penalty | No penalty | No penalty (if account ≥5 years) |
| Qualified education expenses | 10% penalty | No penalty | Contributions: none; Earnings: 10% |
| Substantially Equal Periodic Payments | No penalty | No penalty | No penalty |
| Death or disability | No penalty | No penalty | No penalty |
Required Minimum Distributions (RMDs)
Required minimum distributions force account holders to begin withdrawing from tax-deferred retirement accounts starting at age 73 (under SECURE Act 2.0, rising to 75 in 2033). RMDs apply to traditional 401(k)s, traditional IRAs, SEP IRAs, and SIMPLE IRAs, but not to Roth IRAs during the owner's lifetime. Roth 401(k)s are subject to RMDs, but can be rolled into a Roth IRA to escape them. The RMD calculation divides your prior-year-end account balance by a life expectancy factor from IRS tables, producing a mandatory annual withdrawal that is taxed as ordinary income. Failing to take an RMD triggers a 25% excise tax on the shortfall (reduced to 10% if corrected timely), one of the harshest penalties in the tax code.
The Andersons, both 71, came to me with $850,000 in traditional IRAs and $420,000 in traditional 401(k) from Mr. Anderson's prior employer, plus $180,000 in Roth IRA. Their projected RMD at age 73 was approximately $40,000, on top of $50,000 in Social Security and $15,000 in pension income, pushing them into the 24% bracket and triggering IRMAA Medicare surcharges. I recommended converting approximately $80,000 per year from traditional IRA to Roth IRA during the two years before RMDs begin, paying tax at 22% and reducing the future RMD base. The strategy projected to save them approximately $35,000 in lifetime taxes and $14,400 in IRMAA surcharges. The case shows how strategic Roth conversions in the pre-RMD years can dramatically improve retirement tax outcomes.
401(k) Loans: Convenience with Hidden Risks
401(k) loans are permitted by most plans but generally should be a last resort due to the opportunity cost and repayment risk. You can typically borrow up to 50% of your vested balance or $50,000, whichever is less, and you pay interest back to your own account at the prime rate plus 1%. The interest is not deductible, and the borrowed amount stops compounding for the duration of the loan. The biggest risk is repayment upon job loss: if you leave your employer — voluntarily or not — the outstanding loan balance typically must be repaid within 60 days or it is treated as a taxable distribution with a 10% penalty if you are under 59½. Before taking a 401(k) loan, exhaust emergency savings, Roth IRA contribution withdrawals, and HSA funds.
Rollover Rules: When and How to Move Money
When you leave an employer, you have several options for your 401(k): leave it with the former employer, roll it into your new employer's 401(k), roll it into an IRA, or cash it out (almost always a mistake). Rolling into an IRA typically offers the lowest fees and broadest investment options, but may eliminate access to the Rule of 55 and creditor protections that vary by state. Rolling into a new employer's 401(k) preserves the Rule of 55 if you are 55+, allows for penalty-free withdrawals at 55 from that plan, and may offer access to institutional share classes. Always do a direct rollover (trustee-to-trustee transfer) rather than a 60-day indirect rollover to avoid the 20% withholding trap.
| Rollover Option | Pros | Cons | Best For |
|---|---|---|---|
| Leave with former employer | No action needed | Limited options, may have fees | Short-term, evaluating options |
| Roll to new employer 401(k) | Preserves Rule of 55, consolidation | Limited to plan menu | Still working, plan has good options |
| Roll to IRA | Low fees, unlimited options | Loses Rule of 55, no 401(k) loans | Most rollovers, especially $50k+ |
| Cash out | Immediate access | 20% withholding, 10% penalty, taxes | Almost never recommended |
Myth vs Fact: 401(k) and IRA Misconceptions
Myth: "I should always max out my 401(k) before contributing to an IRA."
Reality: The optimal order is to capture the employer match first, then fund an IRA (which typically offers lower fees and broader investment options), then return to the 401(k) to max it out. A worker earning $100,000 with a 6% match should contribute 6% to the 401(k), then $7,000 to a Roth IRA, then increase 401(k) contributions up to the $23,000 limit. Following this order can save $20,000 to $50,000 in fees over a working career while maintaining the same total savings rate. The "max 401(k) first" advice is common but suboptimal for most workers.
Myth: "Roth accounts are always better because withdrawals are tax-free."
Reality: Roth accounts are better when your current tax bracket is lower than your expected retirement bracket, but worse when the opposite is true. A worker in the 32% bracket contributing to Roth pays $320 in tax per $1,000 contributed, while a traditional contribution saves $320 in current taxes. If that worker retires in the 22% bracket, traditional would have been better because the $1,000 would have been taxed at only $220 in retirement. The Roth versus traditional decision is a tax bracket arbitrage, not a one-size-fits-all rule, and most workers benefit from holding both types for tax diversification.
Myth: "I cannot contribute to a Roth IRA because my income is too high."
Reality: High-income earners above the Roth IRA income limits (2024: $161,000 single, $240,000 married filing jointly) can still contribute to Roth IRAs via the backdoor Roth strategy. You contribute to a nondeductible traditional IRA (which has no income limit), then convert it to a Roth IRA, paying tax only on any pre-tax gains between contribution and conversion. If you have no other traditional IRA balances, the conversion is essentially tax-free. The strategy is legal, well-established, and used by millions of high-income households, but it requires careful execution to avoid the pro-rata rule.
Myth: "I should always roll my old 401(k) into an IRA."
Reality: While IRA rollovers often offer lower fees and broader investment options, there are situations where keeping money in a 401(k) is preferable. If you are 55 or older and might want penalty-free access before 59½, the Rule of 55 applies only to your current employer's 401(k). Some 401(k) plans offer access to institutional share classes with lower expense ratios than retail IRAs, particularly for balances over $250,000. 401(k)s also have stronger creditor protection under federal ERISA law than IRAs, which vary by state. Evaluate each rollover decision individually based on fees, options, age, and asset protection.
Myth: "Roth IRAs are not subject to RMDs."
Reality: Roth IRAs are not subject to RMDs during the original owner's lifetime, but Roth 401(k)s are subject to RMDs. To avoid RMDs on Roth 401(k) balances, roll the Roth 401(k) into a Roth IRA before RMDs begin at age 73. Inherited Roth IRAs are subject to RMDs under the 10-year rule for most non-spouse beneficiaries (under SECURE Act), meaning the entire balance must be distributed within 10 years of the original owner's death. The RMD rules are complex and vary by account type, beneficiary relationship, and original owner's death date.
Myth: "I can withdraw my 401(k) contributions any time without penalty."
Reality: Unlike Roth IRA contributions, which can be withdrawn tax- and penalty-free at any time, traditional 401(k) contributions are pre-tax and subject to income tax plus a 10% early withdrawal penalty if taken before 59½. The exceptions are limited and include death, disability, separation from service at age 55 or later (Rule of 55), and substantially equal periodic payments. Some plans offer hardship withdrawals for specific needs, but these are still subject to tax and penalty. Treat your 401(k) as locked away until 59½ unless you have a clear exception.
Myth: "I should borrow from my 401(k) rather than take a personal loan because I'm paying myself interest."
Reality: 401(k) loans have several hidden costs: the borrowed amount stops compounding, the interest is double-taxed (paid with after-tax dollars and taxed again on withdrawal), and the loan must typically be repaid within 60 days of leaving your employer. If you cannot repay, the balance is treated as a taxable distribution with a 10% penalty if under 59½. For most borrowers, a personal loan, home equity line of credit, or 0% balance transfer credit card is preferable to a 401(k) loan. Reserve 401(k) loans for true emergencies after exhausting other options.
Decision Framework: Choosing Your Strategy
Different life situations call for different account funding strategies. The framework below maps common scenarios to recommended account choices, helping you navigate the complexity with a clear path forward. Adapt the recommendations to your specific circumstances, and revisit the framework annually as your income, family situation, and career evolve. The right strategy is not static — it shifts as you move through your career and approach retirement.
| Situation | Recommended Strategy | Annual Tax Savings |
|---|---|---|
| Single, $50k income, age 25 | 401(k) to match → Roth IRA → max Roth 401(k) | $0 current; tax-free growth |
| Single, $100k income, age 35 | 401(k) to match → Roth IRA → max 401(k) (Roth or Trad mix) | $3,000-$7,000 |
| Married, $250k income, age 40 | 401(k) to match → Backdoor Roth IRA → max 401(k) Trad → HSA | $10,000-$18,000 |
| Self-employed, $150k net, age 45 | Solo 401(k) maxed at $46k employee+employer → SEP if needed | $11,000-$18,000 |
| Near retirement, $300k income, age 60 | Max 401(k) Trad + catch-up → Backdoor Roth → Mega Backdoor if available | $15,000-$30,000 |
| Multiple old 401(k)s, age 50 | Roll into IRA at low-cost broker, then continue current 401(k) | Fee savings $1,000+/year |
Frequently Asked Questions
1. Should I contribute to a 401(k) if my employer does not match?
Yes, but with caveats. Even without a match, the 401(k) offers significant tax-advantaged capacity ($23,000 in 2024) and possible state-level creditor protection. However, if your 401(k) has high fees (over 0.75% total), you may be better off funding an IRA first ($7,000 limit) for lower costs, then returning to the 401(k) for additional tax-deferred space. Compare your 401(k) fees against what you could get in an IRA, and prioritize the lower-cost option for dollars beyond what you need for tax deferral. The tax deferral benefit typically outweighs fees up to about 0.75% combined.
2. What is the backdoor Roth IRA and how does it work?
The backdoor Roth IRA is a two-step strategy for high-income earners who exceed Roth IRA income limits. Step one: contribute to a nondeductible traditional IRA, which has no income limits. Step two: convert the traditional IRA to a Roth IRA. If you have no other traditional IRA balances, the conversion is essentially tax-free because the only basis is your nondeductible contribution. If you do have other traditional IRA balances, the pro-rata rule applies and a portion of the conversion is taxable. Execute the contribution and conversion close together to minimize taxable gains between steps.
3. Can I contribute to both a 401(k) and an IRA in the same year?
Yes, you can contribute to both a 401(k) and an IRA in the same year, subject to each account's contribution limits. Your 401(k) participation may affect the deductibility of traditional IRA contributions if your modified AGI exceeds certain thresholds ($83,000-$103,000 for singles, $136,000-$156,000 for married filing jointly in 2024). Roth IRA contributions are subject to income limits regardless of 401(k) participation. The combined contribution limits are independent, so you can save $23,000 in a 401(k) and $7,000 in an IRA in the same year for a total of $30,000 in tax-advantaged space.
4. What happens to my 401(k) when I change jobs?
You have four options when you leave an employer: leave the 401(k) with the former employer, roll it into your new employer's 401(k) (if the new plan accepts rollovers), roll it into an IRA, or cash it out. Rolling into an IRA is usually the best option for balances over $5,000 because it offers lower fees and broader investment choices. Leaving the money with the former employer is fine for small balances or short transitional periods. Cashing out is almost always a mistake because it triggers taxes and a 10% penalty if under 59½, often destroying 30% to 50% of the balance.
5. What is the Rule of 55 and how does it work?
The Rule of 55 allows penalty-free withdrawals from your current employer's 401(k) if you separate from service (quit, retire, or are laid off) during or after the calendar year you turn 55. The rule applies only to the 401(k) of the employer you are leaving, not to IRAs or prior employer 401(k)s. If you roll a former employer's 401(k) into your current employer's plan, the rolled-in funds also become eligible for the Rule of 55. The withdrawals are still subject to ordinary income tax, but the 10% early withdrawal penalty is waived, making this a powerful tool for early retirees ages 55 to 59½.
6. Can I have multiple IRAs at different brokerages?
Yes, you can have as many IRAs at as many brokerages as you wish, but the total contribution limit is aggregated across all of them. If you have a Roth IRA at Vanguard and another at Fidelity, your combined contributions cannot exceed $7,000 in 2024 (or $8,000 if 50+). Most investors are best served by consolidating IRAs at one or two low-cost brokerages to simplify management and rebalancing. Multiple IRAs add complexity without benefit, particularly for tax reporting. Consolidate old IRAs through direct transfers whenever possible.
7. How do I avoid the pro-rata rule with a backdoor Roth?
The pro-rata rule applies when you have both pre-tax and after-tax money in traditional IRAs and you do a Roth conversion. To avoid the rule complicating your backdoor Roth, you should either roll pre-tax traditional IRA balances into an employer 401(k) plan before executing the backdoor, or do the backdoor before accumulating pre-tax IRA balances. If you have an existing traditional IRA with pre-tax money, consider rolling it into your employer's 401(k) to clear the path for clean backdoor Roth conversions. Consult a tax professional before executing if your situation is complex.
8. What is a mega backdoor Roth and who qualifies?
The mega backdoor Roth is a strategy that allows 401(k) participants to contribute up to $46,000 in additional after-tax money to their 401(k) and convert it to Roth, provided the plan allows after-tax contributions and in-service conversions or in-plan Roth rollovers. To qualify, your plan must specifically permit after-tax contributions (separate from employee salary deferrals and employer match) and either in-plan Roth rollovers or in-service withdrawals to a Roth IRA. Only about 20% of 401(k) plans offer this feature, typically at large employers. If your plan offers it, the mega backdoor is one of the most powerful wealth-building tools available.
9. Are 401(k) and IRA contributions deductible on my tax return?
Traditional 401(k) contributions are always deductible (pre-tax), reducing your W-2 box 1 wages before they appear on your tax return. Traditional IRA contributions are deductible only if you (and your spouse, if married) are not covered by an employer retirement plan, or if your modified AGI falls below phase-out thresholds. Roth 401(k) and Roth IRA contributions are never deductible because they are made with after-tax dollars. The Saver's Credit may apply to traditional and Roth contributions for taxpayers with AGI below $38,000 (single) or $76,000 (married) in 2024.
10. What is the difference between a SEP IRA and a Solo 401(k)?
Both SEP IRAs and Solo 401(k)s are designed for self-employed individuals and small business owners, but they differ in contribution mechanics. A SEP IRA allows contributions up to 25% of compensation or $69,000 in 2024, whichever is less, all from the employer side. A Solo 401(k) allows the same employer contribution plus an employee salary deferral of $23,000 ($30,500 with catch-up), so the same income can generate larger contributions to a Solo 401(k) at lower income levels. Solo 401(k)s also allow Roth contributions and participant loans, while SEP IRAs do not. For sole proprietors with income under $300,000, the Solo 401(k) typically allows larger contributions.
11. How are 401(k) and IRA withdrawals taxed in retirement?
Traditional 401(k) and traditional IRA withdrawals are taxed as ordinary income at your marginal tax rate in retirement. Roth 401(k) and Roth IRA qualified withdrawals (after age 59½ and five-year holding period) are tax-free. Social Security income can become taxable (up to 85%) if your combined income exceeds $25,000 (single) or $32,000 (married), which includes traditional retirement account withdrawals. Plan withdrawals across tax buckets to minimize the "tax torpedo" where Social Security becomes suddenly more taxed. Roth withdrawals do not count toward the Social Security taxation threshold, making them valuable for late-retirement tax management.
12. Can I transfer money between my 401(k) and IRA without penalty?
Yes, through rollovers and transfers, but the direction matters. You can roll a 401(k) into an IRA when you leave an employer, which is a tax-free direct transfer. Rolling an IRA into a 401(k) is also possible if the 401(k) plan accepts incoming rollovers, which most do. Direct rollovers (trustee-to-trustee) have no tax withholding. Indirect rollovers (where you receive the check) trigger 20% mandatory withholding and must be completed within 60 days to avoid taxation. Always use direct rollovers to avoid the withholding trap and potential tax liability.
13. What happens to my 401(k) or IRA when I die?
Your 401(k) and IRA pass to your designated beneficiaries outside of probate, making beneficiary designations critical. Spouses can roll inherited accounts into their own IRAs and treat them as their own, delaying RMDs until their own RMD age. Non-spouse beneficiaries under the SECURE Act must generally empty inherited IRAs within 10 years of the original owner's death, with limited exceptions for minor children, disabled individuals, and those within 10 years of age of the deceased. Roth IRAs inherited by non-spouses are also subject to the 10-year rule but distributions are tax-free. Update beneficiary designations after major life events such as marriage, divorce, births, and deaths.
14. Should I prioritize my 401(k) or paying off high-interest debt?
If your employer offers a 401(k) match, contribute enough to capture it even while paying off high-interest debt, because the match is a 50% to 100% immediate return that beats any credit card interest rate. Beyond the match, prioritize paying off high-interest debt (above 7% APR) before contributing more to retirement accounts, because the guaranteed return of debt paydown exceeds expected market returns for those rates. For low-interest debt below 5% (mortgages, some student loans), contribute more to retirement accounts because expected market returns exceed the debt rate. The order is: capture match → eliminate high-interest debt → fund Roth IRA → max 401(k) → eliminate low-interest debt or invest the surplus.
Putting It All Together: Your Account Strategy
The 401(k) versus IRA choice is not an either/or decision but a sequencing decision that should evolve with your income, age, and career stage. Start by capturing your employer match, then fund an IRA for low-cost diversification, then return to your 401(k) to max it out. Use Roth variants when you expect higher tax rates in retirement and traditional variants when you expect lower rates. Revisit your account funding order annually, especially after income changes, marriage, or job transitions. Use our compound interest calculator to project how different contribution strategies compound over time, and consult a fee-only fiduciary advisor for complex situations involving backdoor Roths, mega backdoor eligibility, or Roth conversion timing. The households that optimize their account funding order add hundreds of thousands of dollars to their retirement wealth without saving a single additional dollar — the optimization is purely a matter of putting each dollar in the account where it earns the highest after-tax, after-fee return.