Two people earn the same salary, save the same fraction of it, buy the same underlying assets and hold for the same twenty-five years. One ends with half as much again as the other. Skill and luck have nothing to do with it. The difference is the container.
Worked example: $6,000 of pay through four containers
Take one concrete unit: $6,000 of pre-tax salary over a 25-year horizon, earning a 7.0% annual total return of which two points arrive as dividends. The holder faces a 22% marginal income-tax rate now and at withdrawal, and a 15% rate on long-term gains and qualified dividends [verify: rates and brackets under the Internal Revenue Code as published by the IRS at irs.gov; brackets are indexed annually and the rates themselves are set by statute]. Put that $6,000 through four containers and it becomes four different numbers.
| Container | Pattern | What $6,000 of pre-tax salary becomes |
|---|---|---|
| Taxable brokerage | taxed in, taxed on the way, taxed out | $21,551.91 |
| Traditional 401(k) or IRA | exempt in, exempt on the way, taxed out | $25,400.38 |
| Roth 401(k) or IRA | taxed in, exempt on the way, exempt out | $25,400.38 |
| Health savings account | exempt in, exempt on the way, exempt out | $32,564.60 |
The taxable account keeps 66.2% of what the health savings account keeps, on identical assets held for identical time by an identical investor. Worked example 7 builds every one of those four numbers line by line, including the year-by-year basis accretion inside the taxable account that most quick comparisons get wrong.
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What does the comparison show?
Three structural facts fall out of that table and they carry across both jurisdictions.
The first is that traditional and Roth are the same product when the tax rate does not move. Both arrive at $25,400.38 here, to the cent, and the identity behind that is worth committing to memory because it settles an argument that consumes an enormous amount of internet oxygen. Deferring tax at rate t and paying it later at the same rate t is arithmetically identical to paying it now, because multiplication commutes. Traditional wins only when your later rate is lower. Roth wins only when your later rate is higher. The ratio of Roth to traditional is (1 − t now) ÷ (1 − t later), which is 0.9744 when you go from 24% to 22% and 1.0556 when you go from 24% to 28%. Everything else said about the choice is a claim about your future tax rate dressed up as a claim about a product.
The second is that a taxable account leaks even when you never sell. The $6,000 case above never realises a gain until the final day, yet it still ends 15% behind the deferred wrapper, because the dividends were taxed every year and the tax on them came out of a compounding base. The drag is small annually and enormous cumulatively, and every cost you will meet on this page has that shape.
The third is that an exempt-exempt-exempt wrapper is a conditional promise. A health savings account is tax-free only against qualified medical spending, and it requires a high-deductible health plan to fund at all [verify: IRS Publication 969, irs.gov, current-year edition]. Its money is not the same liquid money as the brokerage account's. The comparison in the table holds the assets constant and lets the tax treatment vary, which is the right way to see the effect, and it is not a recommendation to fill an account you cannot spend from.
How do India's tax wrappers work?
India's wrappers do not map one for one onto the American ones, and trying to force the mapping is how advisers get this wrong.
The Public Provident Fund is the closest thing to an exempt-exempt-exempt container. Contributions attract a deduction, the credited interest is exempt, and the maturity proceeds are exempt. The fund carries a fifteen-year lock and an annual contribution ceiling [verify: the PPF Scheme as notified by the Ministry of Finance, and Section 80C of the income-tax statute; the rate is reset quarterly and the ceiling is set by notification]. The Employees' Provident Fund works similarly for salaried employees with an employer contribution alongside, and it has acquired a taxable band on employee contributions above a threshold. That is the kind of amendment that turns a memorised rule into a wrong one [verify: EPF Scheme rules and the relevant Finance Act amendment]. The National Pension System is a deferred wrapper with a compulsory annuitisation leg at exit, treated in its own section because the arithmetic that matters is in that leg.
Set one rupee of return against one rupee of deposit interest and the wrapper effect shows in currency. Fifteen annual contributions of ₹1,50,000 growing at 7.1% inside a fully exempt wrapper reach ₹40,68,209. The same flows in a taxable deposit paying the same 7.1%, taxed each year at a 30% slab with 4% cess, reach ₹33,65,608, because after tax the deposit compounds at 4.8848% and not at 7.1%. The wrapper is worth ₹7,02,601 over fifteen years on ₹22,50,000 of contributions, and the investment decision inside both containers was identical.
What is asset location?
Asset location is the name for using this deliberately: put the assets whose income is taxed worst inside the wrappers that shelter income, and keep the assets you can control the realisation timing on in the taxable account. The full planning treatment, with the constraint framework and the client conversation around it, belongs to the private-wealth branch and is not repeated here. What belongs here is the arithmetic that tells you how much the decision is worth, because if you can't compute the ₹7,02,601, you can't argue for it.