Compare the long-term growth of taxable vs. tax-deferred accounts. See the impact of taxes on your investment returns.
Comparison at Retirement Age
Tax-Deferred Account
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Before tax
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After tax (withdrawn)
Taxable Account
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After annual taxes on dividends
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After selling (capital gains tax)
Projected Growth Comparison
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⚠️ Disclaimer: This calculator provides estimates for educational purposes only. Tax laws and rates vary. Consult a tax professional for personalized advice.
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Frequently Asked Quentions
1. What is the difference between a taxable and a tax‑deferred account?
A taxable account (like a standard brokerage account) requires you to pay taxes on dividends and capital gains as they occur, and contributions are made with after‑tax money. A tax‑deferred account (like a traditional IRA or 401k) allows your investments to grow without annual taxes; you pay ordinary income tax only when you withdraw money in retirement.
2. Why does the calculator show a larger after‑tax value for tax‑deferred accounts in most cases?
Because tax‑deferred accounts avoid annual tax drag on dividends and capital gains, allowing more of your money to compound over time. Even though withdrawals are taxed as ordinary income, the long‑term compounding benefit usually outweighs the higher tax rate.
3. Does the calculator assume contributions are the same for both accounts?
Yes. In reality, because tax‑deferred contributions are pre‑tax, you could contribute more for the same after‑tax cost. This calculator focuses on the after‑tax outcome of the same nominal contribution amount.
4. How are dividends taxed in the taxable account?
We assume dividends are qualified and taxed at the long‑term capital gains rate you enter. If you hold non‑qualified dividends, they would be taxed at your ordinary rate, increasing the tax drag.
5. What about state taxes?
This calculator does not include state taxes, which can add several percentage points to your tax drag. You can approximate by increasing the capital gains or ordinary rate.
6. Can I use this calculator for Roth accounts?
No, Roth accounts are tax‑free (not just tax‑deferred). For Roth, you would use a different calculator. This tool is for comparing taxable vs. traditional tax‑deferred accounts.
7. What if I sell investments in the taxable account before retirement?
The calculator assumes you hold all investments until retirement. If you sell earlier, capital gains taxes would be triggered sooner, potentially reducing growth.
8. How does the calculator handle reinvested dividends?
In the taxable account, dividends are taxed and then reinvested after tax. This is a realistic simulation of how annual dividend taxes affect growth.
9. Should I always prioritize tax‑deferred accounts over taxable?
Generally, yes, for long‑term retirement savings. However, if you need liquidity before retirement or expect to be in a higher tax bracket in retirement, a Roth or taxable account might be more appropriate. This calculator helps you compare outcomes.
10. How often should I update this analysis?
Whenever your tax rates change, your investment strategy changes, or you have a significant change in income. Use it to guide your annual savings allocation decisions.
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Contact our team to build a custom calculator.
What Is the Taxable vs. Tax Deferred Investment Growth Calculator?
This calculator helps you compare the long‑term after‑tax growth of two common investment account types: taxable brokerage accounts and tax‑deferred retirement accounts (like traditional IRAs or 401(k)s). It accounts for annual taxes on dividends in taxable accounts, capital gains taxes when you sell, and ordinary income taxes when you withdraw from a tax‑deferred account. By seeing the numbers side by side, you can make more informed decisions about where to invest.
✨ Key Takeaway: Tax‑deferred accounts usually outperform taxable accounts over long periods because taxes on growth are deferred until withdrawal, and you avoid annual tax drag on dividends and capital gains.
How to Use the Calculator
- Enter your current age and retirement age – the number of years your investments will grow.
- Enter initial investment and annual contribution – the amount you start with and add each year.
- Provide expected annual return – total return (price appreciation + dividends).
- Enter dividend yield – the portion of return paid as dividends (taxed annually in taxable accounts).
- Set your tax rates – ordinary income tax rate (for tax‑deferred withdrawals) and long‑term capital gains/qualified dividend rate (for taxable account).
- Click Calculate to see the after‑tax value of both accounts at retirement and the tax advantage of the tax‑deferred account.
⚠️ Important: This calculator assumes contributions are the same for both accounts. In reality, tax‑deferred contributions are pre‑tax, allowing you to contribute more for the same after‑tax cost. The comparison focuses on after‑tax outcomes.
How the Calculation Works
Tax‑Deferred Account:
Balance grows tax‑free each year: Bt+1 = Bt × (1 + r) + C
After‑tax value = Balance × (1 – ordinary_rate)
Taxable Account:
Dividends taxed annually at capital gains rate: after‑tax dividends = dividends × (1 – cap_gains_rate)
Price appreciation: (r – div) × balance
At sale, capital gains tax = (balance – basis) × cap_gains_rate
Balance grows tax‑free each year: Bt+1 = Bt × (1 + r) + C
After‑tax value = Balance × (1 – ordinary_rate)
Taxable Account:
Dividends taxed annually at capital gains rate: after‑tax dividends = dividends × (1 – cap_gains_rate)
Price appreciation: (r – div) × balance
At sale, capital gains tax = (balance – basis) × cap_gains_rate
The simulation runs year by year to capture the effect of annual tax drag in the taxable account.
Practical Examples
📘 Example 1: Long-Term Growth
Age 30, retire at 65, $10,000 initial, $5,000/year, 7% return, 2% dividend yield, 22% ordinary rate, 15% capital gains. Tax‑deferred after‑tax: ~$850,000; taxable after‑tax: ~$720,000. Advantage: $130,000.
Age 30, retire at 65, $10,000 initial, $5,000/year, 7% return, 2% dividend yield, 22% ordinary rate, 15% capital gains. Tax‑deferred after‑tax: ~$850,000; taxable after‑tax: ~$720,000. Advantage: $130,000.
📘 Example 2: Low Dividend Yield
Same as above but 0% dividend yield. Taxable account still has capital gains tax at withdrawal. Tax‑deferred advantage narrows but remains significant.
Same as above but 0% dividend yield. Taxable account still has capital gains tax at withdrawal. Tax‑deferred advantage narrows but remains significant.
📘 Example 3: High Tax Bracket
32% ordinary rate, 20% capital gains. The tax‑deferred advantage becomes even larger because you avoid high annual taxes on dividends and defer the higher ordinary tax until withdrawal (which may be in a lower bracket).
32% ordinary rate, 20% capital gains. The tax‑deferred advantage becomes even larger because you avoid high annual taxes on dividends and defer the higher ordinary tax until withdrawal (which may be in a lower bracket).
When This Calculator Is Most Useful
- Deciding between retirement accounts and taxable accounts – when you have extra savings beyond tax‑advantaged limits.
- Evaluating the impact of dividend taxes – high‑dividend strategies are more tax‑efficient in tax‑deferred accounts.
- Planning asset location – which types of investments to hold in which account.
- Retirement withdrawal planning – seeing the after‑tax value of your savings.
Important Assumptions and Limitations
- Constant tax rates and returns – rates may change over time; returns are not constant.
- No tax loss harvesting or other optimization in taxable account – real investors may reduce taxes through strategies not modeled.
- Dividends assumed qualified and taxed at capital gains rate – some dividends may be non‑qualified (ordinary rate).
- No state taxes considered – state taxes can increase the tax drag.
- No early withdrawal penalties considered – assumes withdrawals at retirement age.
Tips for Maximizing Tax Efficiency
- Max out tax‑deferred accounts (401k, IRA) before investing in taxable accounts.
- Hold high‑dividend or high‑turnover investments in tax‑deferred accounts.
- Use tax‑efficient funds (e.g., index ETFs) in taxable accounts to minimize annual taxable distributions.
- Consider Roth accounts for tax‑free growth if you expect higher tax rates in retirement.
- Review your asset location strategy annually.
Common Mistakes to Avoid
❌ Mistake 1: Ignoring the tax drag of dividends – even a 2% dividend can cost thousands over decades.
❌ Mistake 2: Holding tax‑inefficient funds (active mutual funds with high turnover) in taxable accounts.
❌ Mistake 3: Forgetting that tax‑deferred withdrawals are taxed as ordinary income – plan for that.
❌ Mistake 4: Not considering that tax‑deferred contributions reduce current taxable income.
❌ Mistake 5: Assuming taxable account growth is tax‑free until sale – annual dividend taxes matter.
❌ Mistake 2: Holding tax‑inefficient funds (active mutual funds with high turnover) in taxable accounts.
❌ Mistake 3: Forgetting that tax‑deferred withdrawals are taxed as ordinary income – plan for that.
❌ Mistake 4: Not considering that tax‑deferred contributions reduce current taxable income.
❌ Mistake 5: Assuming taxable account growth is tax‑free until sale – annual dividend taxes matter.
Comparison Table: Tax‑Deferred vs. Taxable Account Features
| Feature | Tax‑Deferred (e.g., Traditional IRA) | Taxable Account |
|---|---|---|
| Contributions | Pre‑tax (reduces current taxable income) | After‑tax |
| Dividends & Capital Gains | Tax‑deferred | Taxed annually (dividends) and at sale |
| Withdrawals | Taxed as ordinary income | Capital gains tax on appreciation |
| Contribution Limits | Yes (e.g., $6,500 IRA, $22,500 401k) | No limit |
Related Concepts
- Roth IRA vs. Traditional IRA – another comparison of tax treatment.
- Asset Location – placing assets in the most tax‑efficient accounts.
- Tax‑Efficient Fund Selection – using ETFs and index funds to minimize taxable distributions.
- Capital Gains Harvesting – strategies to manage taxes in taxable accounts.
✅ Final Thoughts
Choosing between taxable and tax‑deferred accounts has a profound impact on your long‑term wealth. This calculator quantifies the benefit of tax deferral, helping you see why maxing out retirement accounts is a top priority. Use it to make informed decisions about where to allocate your savings, and remember to consider your personal tax situation and investment horizon.
⚠️ Disclaimer: Calculator Mafia provides this tool for informational purposes only. It does not constitute tax or financial advice. Tax laws are complex and subject to change. Always consult a qualified tax professional before making investment decisions.