Start by comparing the accounts, checking your employer match, and choosing a contribution you can afford this month.
For fund choice (index funds, expense ratios), use Investing basics for beginners and Expense ratios. Account wrappers (taxable brokerage vs 401(k)/IRA/HSA): Taxable vs tax-advantaged accounts. Cash you need soon still belongs in an emergency fund, not in the market.
Two accounts, one plain contrast
| Workplace 401(k) (or 403(b)) | Roth IRA | |
|---|---|---|
| Where it lives | Employer’s plan (Fidelity, Vanguard, Empower, and others as recordkeepers) | IRA you open at a brokerage or bank |
| Tax timing (typical) | Traditional 401(k): pre-tax contributions; tax later on withdrawals. Roth 401(k) exists at some employers | Contributions are after-tax; qualified withdrawals are tax-free under IRS rules. IRA-only tax timing: Roth vs traditional IRA taxes |
| Employer match | Often available; free money when you contribute enough to capture it | No employer match |
| 2026-style habit | Automatic paycheck deferral | Automatic transfer from checking on payday |
| Income / eligibility | Plan rules; deferral limits apply | Contribution and income phase-outs apply; check current IRS limits |
Exact dollar limits change by year. Look up the current IRS IRA and 401(k) limits before you set a number.
A practical order for many beginners
- Get the full employer match in the 401(k) if one exists (example: 100% match on the first 4% of pay). Skipping the match leaves compensation on the table. See formulas, vesting, and a paycheck example in Employer 401(k) match.
- Keep a starter emergency fund in a liquid HYSA so a car repair does not become a 401(k) loan.
- Add a Roth IRA (if eligible) for flexible investing outside the workplace plan, especially if you want Roth tax treatment and broad fund choice.
- Increase 401(k) deferrals later toward the annual limit once cash buffers and high-APR debt are under control.
- Full priority map (match → cash → IRA → higher deferrals): When should I contribute to a 401(k) vs an IRA first.
- If you have an HDHP + HSA, keep the deductible in HSA cash, then consider investing HSA surplus alongside Roth/401(k) dollars.
Map contributions inside Budgeting basics so rent still clears. Irregular bills (insurance, car registration) stay in a sinking fund, not in retirement accounts.
Worked example: $70,000 salary, 4% match
Morgan earns $70,000 and the employer matches 100% of the first 4% deferred.
| Step | Monthly action (approx) | Why |
|---|---|---|
| Defer 4% to 401(k) | ~$233 from pay + ~$233 match | Captures the full match |
| HYSA emergency transfer | $100 | Builds cash buffer |
| Roth IRA auto-invest | $100 | After-tax retirement bucket (if eligible) |
Morgan’s “first 4%” is not optional math if the match is real. The Roth IRA layer comes after that match and a minimum cash cushion. Fund picks inside either account can be a low-cost broad index fund; account type and investment choice are separate decisions.
If Morgan has a Roth 401(k) option, that is still a workplace account with plan menus and possible match rules. It is not the same paperwork as a Roth IRA.
Related retirement decisions
- Backdoor Roth basics and mega-backdoor strategies (high-level; not tax advice)
- Solo 401(k) / SEP details for contractors (see tax filing cues in Filing taxes for beginners only as orientation)
- Mortgage payoff vs invest debates and homebuying depth
- Detailed withdrawal-penalty matrices and required minimum distributions (RMDs)
- Roth conversion tax timing (when people move pre-tax dollars to Roth) and the related Roth IRA 5-year rules for contributions vs conversions vs earnings
If your situation includes equity compensation, a pension, or a soon-to-be home purchase, get personalized advice.
Before you leave a job that matched you, confirm how much of that match you keep under employer match vesting.
Inside either wrapper, a single target-date fund can hold the allocation if you will not rebalance yourself.
If you move a workplace plan to an IRA after leaving a job, prefer a direct rollover and avoid the 60-day trap: 401(k) to IRA rollover checklist.
If your plan allows after-tax contributions and Roth conversion, see Mega backdoor Roth basics.
Self-employed profit above IRA room: compare a SEP IRA for side income.
How match formulas turn into dollars per paycheck: What is an employer match on a 401(k).
Checklist
- Log into the benefits portal; write down the match formula and whether Roth 401(k) exists.
- Set deferrals at least high enough to capture the full match.
- Confirm emergency cash has a home before raising investable surplus.
- If eligible, open a Roth IRA and automate a small payday transfer. A spouse with little earned income may still get an IRA funded under spousal rules: Spousal IRA basics.
- Choose low-cost diversified funds (a single target-date fund is a common 401(k) default); ignore hot-stock tips. Cap employer-stock concentration across 401(k)/ESPP/RSUs: Employer stock concentration risk.
- Re-read IRS limit pages each January; adjust autos accordingly. After age 50, extra room may apply. See Catch-up contributions.
- Keep contribution totals visible in the monthly budget.
High earners blocked from direct Roth IRA contributions sometimes use a nondeductible contribution plus conversion. See Backdoor Roth IRA basics. Traditional IRA deduction phaseouts when a workplace plan is in play are a separate MAGI worksheet: Traditional IRA deduction phaseouts.
Small-employer workplace plans may use a SIMPLE IRA rather than a full 401(k). Compare deferral limits and required employer contributions before you assume match rules. Self-employed filers with no staff often compare a solo 401(k) when they want both elective deferrals and employer profit-sharing.
Early-access Roth conversion ladders (five-year clocks after each conversion): Roth conversion ladder basics.
Non-spouse beneficiaries often face a post-SECURE empty-by-year-10 clock, not the same as owner RMDs: Inherited IRA 10-year rule basics.
Non-spouse heirs of a Roth IRA often face a 10-year empty-by with tax-free qualified distributions: Inherited Roth IRA basics.
529 leftovers into a beneficiary Roth under SECURE 2.0: 529-to-Roth IRA rollover basics.
Educational only. Not tax, legal, or investment advice. Contribution limits, income phase-outs, and plan rules change; confirm with IRS publications and your plan documents.