Retirement accounts are the most powerful tax-advantaged tools available to American workers. A 401(k) at your job and an IRA you open yourself can together shelter over $30,000 per year from income tax, letting your investments compound faster than in a taxable account. But the rules — contribution limits, income limits, traditional vs Roth choices — change slightly each year and can be confusing.
This guide covers everything you need to know for 2025: the limits, the strategies, and exactly which account to fund first.
2025 Contribution Limits at a Glance
Key Retirement Account Limits — 2025
| Account | Employee/Individual Limit | Catch-Up (50+) | Total Limit (incl. employer) |
|---|---|---|---|
| 401(k), 403(b), 457(b) | $23,500 | $7,500 (50-59, 64+) / $11,250 (60-63)* | $70,000 |
| Traditional IRA | $7,000 | +$1,000 | $7,000 (or $8,000) |
| Roth IRA | $7,000 (income limits apply) | +$1,000 | $7,000 (or $8,000) |
| SEP-IRA | 25% of compensation | — | $70,000 |
| SIMPLE IRA | $16,500 | +$3,500 | — |
| HSA (self-only / family) | $4,300 / $8,550 | +$1,000 | — |
* The enhanced 60-63 catch-up ($11,250) is new under SECURE 2.0 Act, effective 2025. Workers aged 60, 61, 62, or 63 can contribute up to $34,750 total to their 401(k) in 2025.
Traditional vs Roth: The Core Decision
Every retirement account exists in two flavors — Traditional (pay tax later) and Roth (pay tax now). The choice affects your tax bill today and in retirement.
Traditional vs Roth — Side by Side
| Feature | Traditional | Roth |
|---|---|---|
| Tax on contributions | Pre-tax (reduces income now) | After-tax (no deduction now) |
| Tax on growth | Deferred until withdrawal | Tax-free growth |
| Tax on withdrawals | Taxed as ordinary income | Tax-free (after 5 yrs + age 59½) |
| Required Minimum Distributions | Yes, from age 73 | No (Roth IRA); Yes (Roth 401k, unless rolled to Roth IRA) |
| Best if you expect... | Lower tax rate in retirement | Same or higher tax rate in retirement |
| Income limits | Deductibility phases out at higher incomes (if covered by workplace plan) | Contribution phases out at higher incomes |
When to Choose Traditional vs Roth (Rules of Thumb)
- Young, low income (10-12% bracket): Roth wins. Pay taxes now at a low rate, get decades of tax-free growth.
- High earner, peak career (32-37% bracket): Traditional wins. Deduct at 35% now, withdraw at 22% in retirement.
- Unsure? Split the difference — contribute to both. Many 401(k) plans now offer a Roth 401(k) option alongside the traditional.
- Near retirement with large Traditional balance: Consider Roth conversions in years when your income is temporarily lower, spreading the tax hit over multiple years before RMDs force distributions.
Roth IRA Income Limits 2025
Unlike 401(k) Roth contributions, Roth IRA contributions have income limits:
Roth IRA Phase-Out Ranges — 2025
| Filing Status | Phase-Out Begins | Phase-Out Ends (No Contribution) |
|---|---|---|
| Single / Head of Household | $150,000 | $165,000 |
| Married Filing Jointly | $236,000 | $246,000 |
| Married Filing Separately | $0 | $10,000 |
If your income exceeds these limits, you cannot contribute directly to a Roth IRA. But you can use the backdoor Roth IRA (see below).
Traditional IRA Deductibility Limits 2025
Anyone can contribute to a Traditional IRA, but the deductibility phases out if you (or your spouse) are covered by a workplace retirement plan:
Traditional IRA Deduction Phase-Out — 2025
| Situation | Phase-Out Range |
|---|---|
| Single / HoH — covered by workplace plan | $79,000 – $89,000 |
| MFJ — covered by workplace plan (contributing spouse) | $126,000 – $146,000 |
| MFJ — NOT covered, but spouse IS covered | $236,000 – $246,000 |
| Neither covered by workplace plan | No phase-out — fully deductible |
Above the phase-out, you can still contribute (non-deductible), and then consider converting to Roth (backdoor Roth) to avoid ordinary income tax on future growth.
The Employer Match: Free Money First
If your employer offers a 401(k) match, always contribute enough to capture it before doing anything else. A 50% match up to 6% of salary is a 50% instant return — nothing else in investing comes close.
Employer Match Example — $80,000 Salary, 50% Match up to 6%
Maximum match: 6% × $80,000 = $4,800 × 50% = $2,400 free money per year
To get the full match, you must contribute $4,800 yourself. If you contribute only $3,000 (3.75%), you get $1,500 match — leaving $900 on the table.
Never leave employer match unclaimed. It's the first financial priority before any other investing.
The Optimal Funding Order for 2025
Priority Order: Where to Put Money First
- Step 1 — 401(k) up to employer match: Free money. Always do this first.
- Step 2 — HSA (if eligible for HDHP): Triple tax advantage (deduct contributions, tax-free growth, tax-free withdrawals for medical). Invest it — don't just let it sit.
- Step 3 — Roth IRA (or Traditional IRA) — $7,000: More flexibility than 401(k) (Roth contributions can be withdrawn anytime; more investment options).
- Step 4 — Max out 401(k) — remaining $19,500 (up to $23,500 total): Lower your taxable income further.
- Step 5 — Taxable brokerage: After maxing all tax-advantaged space, invest in a brokerage account using index funds (capital gains rates are lower than ordinary income).
The Backdoor Roth IRA
If your income exceeds the Roth IRA limits, you can still get money into Roth through the backdoor strategy:
- Make a non-deductible Traditional IRA contribution ($7,000)
- Immediately convert the Traditional IRA to Roth (file IRS Form 8606)
- If done promptly, there's little growth to tax — the conversion is nearly tax-free
Pro-rata rule warning: If you have existing Traditional IRA balances (from rollovers or deductible contributions), the pro-rata rule makes the conversion partially taxable. In that case, consider rolling the Traditional IRA into your employer's 401(k) first to clear the way for a clean backdoor Roth.
Frequently Asked Questions
What is the 401(k) contribution limit for 2025?
$23,500 for employees under 50. Ages 50-59 or 64+: $7,500 catch-up. Ages 60-63: $11,250 enhanced catch-up (SECURE 2.0). Total with employer contributions: up to $70,000.
What is the IRA contribution limit for 2025?
$7,000 (or $8,000 if age 50+). This applies to the combined total across all your traditional and Roth IRAs.
What is the Roth IRA income limit for 2025?
Phases out for single filers between $150,000–$165,000, and for MFJ between $236,000–$246,000. Above these, use the backdoor Roth strategy.
Should I choose Traditional or Roth 401(k)?
Traditional if you're in a high bracket now and expect lower taxes in retirement. Roth if you're in a low bracket now or expect higher taxes later. Many advisers recommend splitting between both.
What is the correct order to fund retirement accounts?
(1) 401(k) up to employer match, (2) HSA if eligible, (3) Max IRA, (4) Max remaining 401(k), (5) Taxable brokerage.
What is the backdoor Roth IRA?
A strategy for high earners: make a non-deductible Traditional IRA contribution, then immediately convert it to Roth. The conversion is essentially tax-free if done quickly and you have no other Traditional IRA balances.
Sources: IRS Notice 2024-80 (2025 retirement plan limits); SECURE 2.0 Act of 2022; IRS Publication 590-A (Contributions to IRAs). Educational purposes only — consult a financial adviser or tax professional for personalised guidance.
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