Account Strategy
Roth IRA vs Taxable Brokerage — Where Should Your Next Dollar Go?
Short answer: Roth IRA first, almost always. Here's the full math and the exceptions.
The Speedrun Take
The Roth IRA wins for most people because tax-free growth for 30+ years is worth more than the flexibility of a taxable account. But the Roth IRA has a $7,000/year limit and income restrictions. Once those are hit, the taxable brokerage takes over. Follow the investment order: 401k match → HSA → Roth IRA → Max 401k → Taxable.
The Core Difference
Roth IRA
- →Contribute after-tax money
- →Growth is completely tax-free
- →Qualified withdrawals in retirement are tax-free
- →Contribution limit: $7,000/year
- →Income limit: phases out above $146k single / $230k married (2024)
Taxable Brokerage
- →Contribute after-tax money
- →Growth is taxed annually (dividends) and at sale (capital gains)
- →No contribution limit
- →No income restrictions
- →No penalties for early withdrawal
The Tax Math
Let's run the numbers on a single year's $7,000 contribution invested for 30 years at 8% annual growth.
| Roth IRA | Taxable Brokerage | |
|---|---|---|
| Starting amount | $7,000 | $7,000 |
| Value after 30 yrs | $70,500 | $70,500 |
| Tax at withdrawal | $0 — tax-free | 15% on ~$63,500 gains ≈ $9,500 |
| Net in your pocket | $70,500 | ~$61,000 |
Roth advantage on this single contribution: ~$9,500. Multiply this across every year you contribute and the gap becomes significant.
Start the 5-Year Clock Today
Open a Roth IRA at Fidelity and buy FZROX at a 0% expense ratio — the same account that runs the Roth vs taxable math above.
When Taxable Beats Roth
The Roth wins most of the time — but there are real exceptions.
Income exceeds the Roth limit and 401k is maxed
The Backdoor Roth is an option, but it's complex. If you don't want to deal with it, taxable is a solid choice.
You need the money before 59½ and contributions aren't enough
Roth contributions can be withdrawn anytime, but growth is locked up. Taxable has zero restrictions.
You're in the 0% capital gains bracket
Income under ~$47k single (2024)? Long-term capital gains are taxed at 0%. Taxable growth is effectively tax-free — the Roth advantage shrinks dramatically.
You want assets not available inside an IRA
Certain complex or alternative investments can't be held in an IRA. Taxable is your only option.
The Access Rules (Common Misunderstanding)
Most people think Roth is locked until 59½.
That's only true for the growth. Your contributions — the money you actually put in — can be withdrawn anytime, at any age, with no penalty and no taxes. You already paid taxes on it.
Example: you contribute $7,000 to a Roth IRA. It grows to $9,500. You can pull out $7,000 tomorrow with zero penalty. Only the $2,500 in growth is restricted until 59½ (with some exceptions for first home purchase, disability, etc.).
This makes the Roth far more accessible than most people realize — and removes one of the main arguments for choosing taxable over Roth.
The 5-Year Rule
Your Roth IRA must be open for at least 5 years before you can withdraw growth tax-free and penalty-free (even after age 59½).
The clock starts on January 1st of the first year you contribute. Open your Roth IRA now — even with just $1 — to start the 5-year clock immediately. Waiting costs you years of flexibility.
Which Funds to Use in Each Account
Asset location matters. Put the right funds in the right accounts.
Roth IRA — Maximize Growth
All growth comes out tax-free, so load up on high-growth funds.
- →FZROX — Fidelity Zero Total Market (0% expense ratio)
- →VTI — Vanguard Total Stock Market ETF
- →High-growth assets — every dollar of gain is forever tax-free
Taxable — Prioritize Tax Efficiency
Minimize taxable events. Broad index ETFs are ideal.
- →VTI / VXUS — low turnover, tax efficient
- →Avoid bond funds — interest is taxed as ordinary income
- →Avoid high-turnover active funds — frequent sales create taxable events
Decision Flowchart
Work through these in order. Most people stop at step 1.
Are you over the Roth income limit?
Have you maxed your Roth IRA ($7,000)?
Need the money before 59½?
Get Started Today
Open Fidelity — Best for Both Account Types
Fidelity lets you open a Roth IRA and a taxable brokerage in the same place. FZROX at 0% expense ratio inside your Roth IRA is the strongest combination available.