Choosing the right mix of retirement accounts can save you tens of thousands in taxes over your lifetime. Here’s how every major retirement account compares on contribution limits, tax treatment, and withdrawal rules for 2026.
Master Comparison Table
| Feature | Traditional 401(k) | Roth 401(k) | Traditional IRA | Roth IRA | HSA | SEP IRA | Solo 401(k) |
|---|---|---|---|---|---|---|---|
| 2026 contribution limit | $23,500 | $23,500 | $7,000 | $7,000 | $4,300 (self) / $8,550 (family) | $70,000 or 25% of comp | $70,000 total |
| Catch-up (50+) | +$7,500 | +$7,500 | +$1,000 | +$1,000 | +$1,000 (55+) | N/A | +$7,500 |
| Tax on contributions | Tax-deductible | After-tax | Tax-deductible* | After-tax | Tax-deductible | Tax-deductible | Tax-deductible or Roth |
| Tax on growth | Tax-deferred | Tax-free | Tax-deferred | Tax-free | Tax-free | Tax-deferred | Tax-deferred or free |
| Tax on withdrawals | Ordinary income | Tax-free | Ordinary income | Tax-free | Tax-free (medical) | Ordinary income | Depends on contribution type |
| Income limit | None | None | Deduction phases out | $161K (S) / $240K (MFJ) | Must have HDHP | Must have self-employment income | Must have self-employment income |
| Employer match | Yes | Yes | No | No | Some employers | Employer contributes | You are employer |
| RMDs | Age 73/75 | Age 73/75** | Age 73/75 | None | None | Age 73/75 | Age 73/75 |
| Early withdrawal penalty | 10% before 59½ | 10% on earnings before 59½ | 10% before 59½ | None on contributions | 20% for non-medical before 65 | 10% before 59½ | 10% before 59½ |
*Deduction may be limited if covered by workplace plan. **Roth 401(k) RMDs can be avoided by rolling to Roth IRA.
2026 Contribution Limits Summary
| Account | Under 50 | Age 50-59 / 64+ | Age 60-63 (Super Catch-Up) |
|---|---|---|---|
| 401(k) / 403(b) / 457(b) | $23,500 | $31,000 | $34,750 |
| Traditional IRA | $7,000 | $8,000 | $8,000 |
| Roth IRA | $7,000 | $8,000 | $8,000 |
| HSA (self-only) | $4,300 | $5,300 | $5,300 |
| HSA (family) | $8,550 | $9,550 | $9,550 |
| SEP IRA | Up to $70,000 | Up to $70,000 | Up to $70,000 |
| Solo 401(k) | Up to $70,000 | Up to $77,500 | Up to $81,250 |
| SIMPLE IRA | $16,500 | $20,000 | $21,750 |
Tax Treatment Comparison
Contribution Phase
| Account | Tax Benefit | Best If You Expect… |
|---|---|---|
| Traditional 401(k) | Reduces taxable income today | To be in a lower tax bracket in retirement |
| Roth 401(k) | No tax break today | To be in the same or higher bracket in retirement |
| Traditional IRA | Reduces taxable income (if eligible) | To be in a lower bracket later |
| Roth IRA | No tax break today | Higher bracket later OR want flexibility |
| HSA | Reduces taxable income (+ no FICA) | Medical expenses now or in retirement |
Withdrawal Phase
| Account | Age 59½+ Withdrawals | Before 59½ | RMD Rules |
|---|---|---|---|
| Traditional 401(k) | Taxed as ordinary income | 10% penalty + income tax | Start at 73 or 75 |
| Roth 401(k) | Tax-free (if 5-year rule met) | 10% penalty on earnings | Required (roll to Roth IRA to avoid) |
| Traditional IRA | Taxed as ordinary income | 10% penalty + income tax | Start at 73 or 75 |
| Roth IRA | Tax-free (if qualified) | Contributions any time; earnings penalized | None during your lifetime |
| HSA | Tax-free for medical; taxed for non-medical | 20% penalty + tax for non-medical | None |
Account Priority Order
Recommended Savings Priority
| Priority | Action | Why |
|---|---|---|
| 1 | 401(k) up to employer match | Free money (50-100% return instantly) |
| 2 | HSA (if eligible) | Triple tax advantage—best tax-advantaged account |
| 3 | Roth IRA (if income-eligible) | Tax-free growth, no RMDs, flexible withdrawals |
| 4 | 401(k) above match to max | Additional tax-deferred growth |
| 5 | Backdoor Roth IRA | If over Roth IRA income limit |
| 6 | Mega backdoor Roth | If plan allows after-tax contributions |
| 7 | Taxable brokerage account | No limits, flexible, favorable capital gains rates |
| 8 | 529 plan | If you have education expenses to fund |
Maximum Possible Tax-Advantaged Savings (2026, Under 50)
| Account | Maximum |
|---|---|
| 401(k) | $23,500 |
| Roth IRA | $7,000 |
| HSA (family) | $8,550 |
| Mega backdoor Roth (if available) | ~$39,000 |
| Total potential | $78,050 |
Self-Employed Retirement Accounts
SEP IRA vs Solo 401(k) vs SIMPLE IRA
| Feature | SEP IRA | Solo 401(k) | SIMPLE IRA |
|---|---|---|---|
| Who can use | Self-employed, small business | Self-employed, no employees | Small businesses (≤100 employees) |
| Max contribution (2026) | $70,000 or 25% of net SE income | $70,000 (employee + employer) | $16,500 + employer match |
| Employee contributions | No (employer only) | Yes ($23,500) | Yes ($16,500) |
| Roth option | No | Yes | Yes (starting 2023) |
| Loan provision | No | Yes | No |
| Complexity | Very easy | Moderate | Easy |
| Best for | High-income, easy setup | Maximum flexibility | Small businesses with employees |
Self-Employed Contribution Examples
| Net Self-Employment Income | SEP IRA Max (25%) | Solo 401(k) Max | Difference |
|---|---|---|---|
| $50,000 | $12,500 | $35,963* | +$23,463 |
| $100,000 | $25,000 | $48,500* | +$23,500 |
| $150,000 | $37,500 | $61,000* | +$23,500 |
| $200,000 | $50,000 | $70,000 | +$20,000 |
| $280,000+ | $70,000 | $70,000 | Same |
*Solo 401(k) = $23,500 employee + 25% of net SE income as employer contribution.
Account Features Comparison
Flexibility and Access
| Feature | 401(k) | IRA | Roth IRA | HSA |
|---|---|---|---|---|
| Loan available | Usually (up to $50,000) | No | No | No |
| Hardship withdrawal | Yes (with cause) | Yes (with penalty exceptions) | Contributions anytime | For qualified medical expenses |
| Creditor protection | Federal (ERISA) | State-dependent (up to $1.5M federal in bankruptcy) | Same as IRA | Varies by state |
| Investment options | Limited to plan choices | Nearly unlimited | Nearly unlimited | Varies by provider |
| Rollover options | To IRA or new 401(k) | To 401(k) or Roth IRA | To another Roth IRA | To another HSA |
Which Accounts to Have at Each Life Stage
| Life Stage | Recommended Accounts | Focus |
|---|---|---|
| 20s (starting career) | 401(k) to match + Roth IRA | Roth while in lower brackets |
| 30s (growing income) | 401(k) max + Roth IRA + HSA | Tax diversification |
| 40s (peak earning) | Max all available + backdoor Roth | Maximize tax-advantaged space |
| 50s (pre-retirement) | Max all + catch-up contributions | Accelerate savings |
| 60s (transition) | Roth conversions if in lower bracket | Tax-efficient drawdown planning |
| 70s+ (retirement) | RMD management, Roth IRA | Minimize RMD tax impact |
Tax Diversification Strategy
Why Have Multiple Account Types
| Account Type | Tax Treatment | Role in Retirement |
|---|---|---|
| Pre-tax (401(k), traditional IRA) | Taxed on withdrawal | Fill up low tax brackets |
| Roth (Roth IRA, Roth 401(k)) | Tax-free withdrawal | Large expenses without tax impact |
| HSA | Tax-free for medical | Cover healthcare costs tax-free |
| Taxable brokerage | Capital gains rates | Flexible access, long-term capital gains rates |
Tax-Efficient Withdrawal Example ($80,000/year Needed)
| Source | Amount | Tax Impact |
|---|---|---|
| Social Security | $25,000 | ~$0 (85% threshold not reached) |
| Traditional 401(k) | $23,475 | ~$2,600 (fills 12% bracket) |
| Roth IRA | $25,000 | $0 |
| HSA (medical expenses) | $6,525 | $0 |
| Total income | $80,000 | ~$2,600 total tax |
| Effective tax rate | — | 3.3% |