Why tax-efficient investing matters
Tax-efficient investing is about keeping more of your investment returns by minimising the taxes you pay. Even small improvements in tax efficiency can compound into significant savings over decades of investing.
Tax-advantaged investment accounts
Contribution limits below are for the 2024 tax year. They are adjusted most years, so confirm the current figures before planning around them, and check the rules that apply where you live.
401(k) plans
Traditional 401(k)
- Pre-tax contributions
- Tax-deferred growth
- Taxed as ordinary income in retirement
- 2024 limit: $23,000 ($30,500 if 50+)
Roth 401(k)
- After-tax contributions
- Tax-free growth and withdrawals
- No required distributions
- Same contribution limits
Individual retirement accounts (IRAs)
Traditional IRA
- Potentially deductible contributions
- Tax-deferred growth
- Income limits for deductibility
- 2024 limit: $7,000 ($8,000 if 50+)
Roth IRA
- After-tax contributions
- Tax-free growth and withdrawals
- Income limits apply
- More flexible withdrawal rules
Health Savings Account (HSA)
Asset location strategy
Asset location involves placing different types of investments in the most tax-efficient accounts. This strategy can meaningfully improve your after-tax returns without changing your overall allocation at all.
Tax-deferred accounts
(401k, Traditional IRA)
Best for:
- Taxable bonds
- REITs
- High-turnover funds
- Dividend-heavy stocks
Tax-free accounts
(Roth IRA, Roth 401k)
Best for:
- Highest growth potential assets
- Small-cap stocks
- International stocks
- Assets you will not need soon
Taxable accounts
(Brokerage accounts)
Best for:
- Tax-efficient index funds
- Tax-managed funds
- Municipal bonds
- Individual stocks (for tax-loss harvesting)
Tax-loss harvesting
Tax-loss harvesting involves selling investments at a loss to offset capital gains and reduce your tax bill. It is particularly effective in taxable accounts.
Sell at a loss
Sell investments that are trading below your purchase price.
Offset your gains
Use the losses to offset capital gains from other investments.
Deduct against income
If losses exceed gains, deduct up to $3,000 against ordinary income.
Carry forward the rest
Carry forward excess losses to future years.
Why index funds are tax-efficient
Low turnover
Minimal buying and selling reduces taxable distributions.
In-kind redemptions
ETFs can distribute low-basis shares to institutional investors.
Broad diversification
Reduces the impact of individual stock actions like spin-offs.
Tax efficiency comparison
| Investment type | Typical tax efficiency |
|---|---|
| Index funds | Most efficient |
| ETFs | Very efficient |
| Active funds | Less efficient |
| Individual stocks | Variable |
Choosing tax-efficient funds
Low turnover ratio
Look for turnover under 20% annually.
Tax-managed options
Some funds specifically optimise for tax efficiency.
ETF structure
ETFs are generally more tax-efficient than mutual funds. See ETFs vs mutual funds.
Distribution history
Check the fund's capital gains distribution history.
Popular tax-efficient index funds
VTI — Vanguard Total Stock Market Index (VTSAX/VTI)
Broad US market exposure with very low turnover.
VOO — Vanguard S&P 500 Index (VFIAX/VOO)
Tracks the 500 largest US companies.
FZROX — Fidelity Total Market Index
Fidelity's zero expense ratio total market fund.
SCHB — Schwab Total Stock Market (SWTSX/SCHB)
Schwab's broad US market option.
IVV — iShares Core S&P 500
A large, liquid S&P 500 ETF. Compare options on the funds page.
Municipal bonds for tax efficiency
Benefits
- Federal tax-free interest
- State tax-free (for in-state bonds)
- Good for high-tax-bracket investors
- Lower volatility than stocks
Considerations
- Lower yields than taxable bonds
- Credit risk exists
- May trigger AMT
- Best held in taxable accounts
Tax-equivalent yield formula:
Tax-equivalent yield = municipal yield / (1 - your tax rate)
Example: 3% municipal yield / (1 - 0.32) = 4.41% tax-equivalent yield.
Year-end tax planning
December actions
- Review tax-loss harvesting opportunities
- Maximise retirement account contributions
- Consider Roth conversions
- Donate appreciated securities to charity
Quarterly reviews
- Monitor capital gains and losses
- Rebalance tax-efficiently
- Check your asset location strategy
- Review fund distributions
Common tax-efficiency mistakes
Key takeaways
- Maximise contributions to tax-advantaged accounts first
- Use asset location to place investments in appropriate account types
- Choose tax-efficient index funds and ETFs
- Implement tax-loss harvesting in taxable accounts
- Consider municipal bonds if you are a high-income investor
- Plan year-end tax moves in advance
- Remember: what matters is after-tax returns, not just gross returns