Tax-advantaged retirement accounts are one of the most powerful — and most underused — tools available to regular people. Understanding what they are, how they differ, and which to prioritize can be worth hundreds of thousands of dollars over a lifetime.
A 401k is offered through your employer. Contributions are pre-tax (Traditional 401k), reducing your taxable income today. Many employers match contributions up to a certain percentage — that match is free money and should always be captured first. The 2025 contribution limit is $23,500 ($31,000 if age 50+).
Contributions are made with after-tax money. But the growth and withdrawals in retirement are completely tax-free. For young investors in lower tax brackets today, the Roth IRA is often the ideal account — you pay taxes on a small income now, and never pay taxes on the decades of growth. 2025 contribution limit: $7,000 ($8,000 if 50+).
Contributions may be tax-deductible today (depending on income and access to a workplace plan). Growth is tax-deferred. Withdrawals in retirement are taxed as ordinary income. Makes most sense when you expect to be in a lower tax bracket in retirement than you are today.
Many employers now offer a Roth 401k option — which combines the higher contribution limits of a 401k with the after-tax, tax-free-growth structure of a Roth IRA. For those with long time horizons and access to this option, it's worth considering, especially if you expect your tax bracket to rise.
Traditional IRAs and 401ks require you to start withdrawing a minimum amount each year after age 73. This forces you to take taxable income in retirement even if you don't need it. Roth IRAs have no RMDs during the owner's lifetime — one of the key advantages of Roth accounts for estate planning.
High earners above the Roth IRA income limits ($161,000 single / $240,000 married for 2024) can still access a Roth IRA through the "backdoor" strategy: contribute to a non-deductible Traditional IRA, then convert it to Roth. It's legal, widely used, and worth understanding if you're above the income limits.
The question most retirement advisors won't bring up — but probably should. Reed walks through how he holds Bitcoin inside a tax-advantaged IRA and why the combination of Bitcoin's potential and IRA tax benefits is hard to ignore.
Read: Bitcoin IRA — How I Did It →| Account | 2025 Limit | Tax Benefit | Withdrawals | Employer Match? |
|---|---|---|---|---|
| Roth IRA | $7,000 | After-tax contribution | Tax-free in retirement | No |
| Traditional IRA | $7,000 | May be deductible | Taxed as income | No |
| 401k (Traditional) | $23,500 | Pre-tax contribution | Taxed as income | Often yes |
| Roth 401k | $23,500 | After-tax contribution | Tax-free in retirement | Often yes |
Contribution limits subject to change. Verify current limits at IRS.gov. Catch-up contributions available at 50+ for all accounts.
"The order I'd suggest for most people: first, contribute to your 401k enough to get the full employer match. Then max your Roth IRA. Then, if you can, go back and max the 401k. The tax-free growth in a Roth IRA over 30-40 years is extraordinary — and the earlier you start, the more powerful it becomes. If I could redo one thing in my financial life, it would be opening a Roth IRA at 22 instead of 29."
It depends on your tax situation. If you're in a low tax bracket now and expect to be in a higher one later (typical for young earners), Roth wins — you pay taxes at today's lower rate. If you're in a high bracket now and expect lower income in retirement, Traditional wins — you get the deduction today. Many people benefit from having both — diversifying tax treatment.
Generally, withdrawals before age 59½ from retirement accounts incur a 10% penalty plus income taxes. Roth IRA contributions (not earnings) can be withdrawn penalty-free at any time — another reason Roth is popular for younger investors. There are exceptions (first home purchase, disability, medical expenses) — worth researching if you're in that situation.
You have several options: leave it with your former employer, roll it over to your new employer's 401k, roll it over to an IRA, or cash it out (not recommended — triggers taxes and penalties). Rolling to an IRA gives you the most investment flexibility and control. Consolidating accounts you've accumulated over multiple jobs simplifies management.