Most people recognize they should be saving for retirement. Fewer understand how the different account types work — 401(k), Roth IRA, Traditional IRA — and which makes sense depending on your situation. Here’s a clear breakdown.
The Tax Treatment Divide
Retirement accounts offer tax advantages that regular investment accounts don’t. The key question: do you pay taxes on the money before it goes in (Roth) or when it comes out (Traditional/pre-tax)? That decision drives most of the planning around retirement accounts.
401(k) Plans: Employer-Sponsored
A 401(k) is offered through your employer. Traditional 401(k) contributions are pre-tax — they reduce your taxable income today. If you earn $70,000 and contribute $6,000 to a traditional 401(k), you’re only taxed on $64,000 of income. The money grows tax-deferred; you pay ordinary income tax when you withdraw in retirement.
Roth 401(k)s are also available at many employers: contributions come from after-tax dollars, but withdrawals in retirement are tax-free.
The 2025 contribution limit for 401(k)s is $23,500 ($31,000 for those 50+). This is the combined limit for both traditional and Roth contributions to a 401(k).
Employer Match
Many employers match a percentage of your contributions — for example, 50% of contributions up to 6% of salary. If you earn $60,000 and contribute 6% ($3,600), the employer adds $1,800. That’s an immediate 50% return on your contribution. Contributing at least enough to get the full match is broadly agreed to be the highest-priority retirement action for people with access to a matching plan.
Traditional IRA
An Individual Retirement Account (IRA) is opened independently of your employer. Traditional IRA contributions may be tax-deductible depending on your income and whether you have a workplace retirement plan. Earnings grow tax-deferred; withdrawals in retirement are taxed as ordinary income.
The 2025 contribution limit is $7,000 ($8,000 for those 50+). Deductibility phases out at higher incomes for those covered by a workplace plan.
Roth IRA
Roth IRA contributions are made with after-tax dollars — no deduction today. In exchange, qualified withdrawals in retirement are completely tax-free, including decades of growth.
Eligibility phases out at higher incomes: in 2025, the phase-out starts at $150,000 for single filers and $236,000 for married filing jointly. Above these thresholds, contributions are limited or eliminated. There’s a workaround (the “backdoor Roth” conversion) for high earners, though it has its own considerations.
The Roth IRA also has a unique feature: contributions (not earnings) can be withdrawn any time without penalty or tax — making it somewhat accessible as a savings vehicle in a pinch, though depleting retirement savings for non-retirement expenses has significant long-term cost.
Traditional vs Roth: The Core Decision
The question is whether you’ll be in a higher or lower tax bracket in retirement than you are now. If you’re early in your career and expect income (and taxes) to rise: Roth is often better — pay taxes at today’s lower rate. If you’re in peak earning years and expect income to decline in retirement: Traditional is often better — defer taxes until you’re in a lower bracket.
When uncertain, diversifying between both types provides flexibility. You can adjust withdrawals in retirement based on tax conditions at that time.
Sequence: Which Accounts First
A common ordering: (1) 401(k) contributions up to the employer match (free money), (2) max out an IRA (more investment options, potentially better costs than your 401(k)), (3) contribute more to the 401(k) up to the annual limit. This isn’t universal — if your 401(k) has excellent low-cost index funds, maximizing it before the IRA is reasonable. If your 401(k) has high-fee options, the IRA first may be preferable.
Starting Amount and Consistency
You don’t need to max out these accounts to benefit from them. Contributing $200/month to a Roth IRA starting at 25 results in more than $300,000 at a 7% average annual return by age 65 — from $96,000 in contributions. Starting later requires significantly larger contributions to reach the same result. Time is the most valuable factor.
