Taxable vs Tax-Advantaged Account Growth Comparison
Compare a simple taxable account with a tax-advantaged account (Roth-style or Traditional-style) and see how taxes on returns can affect your long-term growth in this simplified model.
This is an educational tool to help you understand tax drag, not personalized tax or investment advice.
Last updated: February 9, 2026
Taxable vs Tax-Advantaged Accounts: Where Should Your Money Go?
You can invest $10,000 in a taxable brokerage or a Roth IRA. Same investment, same expected return—but 30 years later, one account could have $30,000 more. The difference comes down to "tax drag": the annual bite taxes take from returns in a taxable account.
This taxable vs tax-advantaged calculator shows the long-term cost of paying taxes each year on dividends and gains versus deferring or avoiding taxes entirely. The common mistake is underestimating how small annual tax costs compound into large differences over decades.
Tax-advantaged accounts (401k, IRA, HSA) have contribution limits and access restrictions. Taxable accounts offer flexibility but cost you returns along the way. Understanding this trade-off helps you prioritize where to save first.
How Account Types Compare
| Factor | Taxable Brokerage | Tax-Advantaged |
|---|---|---|
| Annual taxes on growth | Yes—dividends, interest, realized gains | No—grows tax-deferred or tax-free |
| Contribution limits | None | Annual limits apply ($7k IRA, $23.5k 401k in 2025) |
| Access before 59½ | Anytime, no penalty | Penalties or restrictions apply |
| Tax at withdrawal | Only unrealized capital gains (at long-term rates) | Traditional: ordinary income tax; Roth: none |
| Best for | After maxing tax-advantaged, or goals before retirement | Long-term retirement savings |
Tax Drag Explained Simply
Every year in a taxable account, you pay taxes on dividends and any gains you realize. That money leaves your account and can't compound. At 1% annual tax drag, you effectively earn 6% instead of 7%. Over 30 years, that 1% difference costs you roughly 25% of your potential ending balance.
In tax-advantaged accounts, 100% of your returns stay invested and compound. Traditional accounts defer taxes until withdrawal. Roth accounts never tax the growth at all. Either way, more money stays working for you.
The effect isn't dramatic year by year—but compounded over decades, it's significant. This is why most advisors say: max out tax-advantaged accounts before putting money in taxable investments.
Two Scenarios to Consider
Example 1: Young Investor, 35-Year Horizon
Setup: $6,000/year for 35 years, 7% return, 1.2% annual tax drag in the taxable account. Compare taxable vs Roth IRA.
Result: Roth ending balance: ~$880,000 (all tax-free). Taxable ending balance: ~$720,000 (mostly already taxed). Difference: $160,000.
Takeaway: That 1.2% annual tax drag costs $160k over 35 years. For young investors with decades ahead, maxing Roth is almost always right.
Example 2: High Earner, 15-Year Horizon
Setup: Already maxing 401k and IRA. Has $20,000/year extra to invest. 15-year horizon, 7% return, 0.8% tax drag (using tax-efficient index funds).
Result: Taxable ending balance: ~$520,000 vs ~$550,000 if tax-advantaged were available. Difference: ~$30,000.
Takeaway: With tax-efficient investing and a shorter horizon, the gap shrinks. Taxable accounts make sense after maxing all tax-advantaged options—just minimize tax drag with index funds.
When Each Account Type Makes Sense
Prioritize Tax-Advantaged When
- You haven't maxed your 401k, IRA, or HSA
- You won't need the money before retirement
- You have 10+ years until you'll access the funds
- Your employer offers a 401k match (always take free money)
Taxable Accounts Make Sense When
- You've already maxed tax-advantaged options
- You need money before 59½ (house down payment, early retirement)
- You want no restrictions on when and how you access funds
- You're building a bridge to retirement before 59½
What This Calculator Assumes
Tax drag varies by investment type: broad index funds might be 0.3-0.7%, dividend stocks 1-2%, actively managed funds 1-3%. Enter an estimate based on your expected investments.
The calculator doesn't model state taxes, specific capital gains rates, or tax-loss harvesting (which can reduce taxable account drag). It uses simplified assumptions for illustration.
For Traditional accounts, remember the ending balance still owes taxes at withdrawal. Roth balances are fully yours. The fair comparison is after-tax values, which this calculator shows.
Official Sources
- IRS.gov — Capital Gains and Losses — Tax treatment of investment gains
- IRS.gov — Retirement Plans — Tax-advantaged account rules
- SEC Investor.gov — Tax-efficient investing education
Tax rates and rules change. Verify current information at irs.gov before making decisions based on these comparisons.
For Educational Purposes Only - Not Financial Advice
This calculator provides estimates for informational and educational purposes only. It does not constitute financial, tax, investment, or legal advice. Results are based on the information you provide and current tax laws, which may change. Always consult with a qualified CPA, tax professional, or financial advisor for advice specific to your personal situation. Tax rates and limits shown should be verified with official IRS.gov sources.