Tax drag is a fee you can often remove entirely
The claim
Holding the same investment inside a tax-advantaged account rather than a taxable one raises net returns with no additional risk taken.
Why we rate it strong
Arithmetic, given the tax rules. What varies is the size of the effect across jurisdictions and account types.
Tax on dividends and realised gains works exactly like a fee: an annual deduction from returns, scaling with the balance, compounding against you. The difference is that in most jurisdictions a portion of it is optional, because tax-advantaged accounts exist and are usually under-used relative to their limits.
The size of the effect depends on your jurisdiction, marginal rate, and the yield of the holding, but the direction never does. Sheltering the same asset raises the net return without changing the risk taken. No security selection decision can make that claim.
Asset location follows from the same logic. If some of your holdings must sit in a taxable account, put the tax-inefficient ones — high-yield bonds, high-turnover funds, anything throwing off regular taxable income — inside the shelter, and leave the tax-efficient ones outside.
We deliberately do not give jurisdiction-specific tax guidance. The rules differ substantially between countries, they change, and getting them wrong is expensive. What this tool does is show you the size of the drag so you know how much attention the question deserves.
Where this breaks down
- Tax-advantaged accounts usually restrict access to the money, and that lock-up has a real cost if you need liquidity.
- Rules change. A shelter that is generous today may be less so in thirty years, which is a genuine argument for holding some assets outside.
- Contribution limits bind. Beyond them the comparison shifts to tax-efficient investing inside a taxable account.
Sources
Follow these rather than taking our word for the summary.
William F. Sharpe (1991). The Arithmetic of Active Management
Financial Analysts Journal, 47(1), 7-9
Finding: Costs, including tax drag, are deducted from a fixed pool of market return; reducing them is the reliable way to raise net returns.