Regular monthly investing into Hong Kong stocks or ETFs.
Future value
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Total invested
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Gain (tax-free)
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Your breakdown
Updates live as you type| Result after 20 years | Amount |
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The case for investing on autopilot
Dollar-cost averaging means putting the same amount into the market on a fixed schedule, every month, whatever the price that month happens to be. When prices are low your money buys more units; when they are high it buys fewer. You stop trying to time the market and let regular contributions and compounding do the work. This calculator takes a monthly amount, an expected annual return and a time horizon, and shows the future value, what you actually contributed, and the gain on top. In Hong Kong that gain is the headline, because for a genuine buy-and-hold investor it is tax-free.
The tool is built for the long-horizon saver feeding a stocks or ETF plan, not the trader. Its discipline is the point: the same sum, month after month, is what most reliably turns a modest salary into real wealth over a couple of decades.
$8,000 a month for twenty years
Take the defaults: $8,000 invested every month, an assumed 7 percent annual return, over 20 years. You contribute $1.92 million in total, $8,000 times 12 months times 20 years. Compounded monthly at 7 percent, that grows to about $4.17 million. The difference, roughly $2.25 million, is investment gain, and as a long-term investor in Hong Kong you keep every dollar of it because there is no capital gains tax on the disposal of a genuine investment.
More than half the final pot is gain rather than the cash you put in. The chart shows the split: the grey block is your contributions, the teal block on top is the tax-free growth.
Read the projection, do not trust it blindly
The maths is exact but the inputs are not. The 7 percent is a smooth assumption; real markets deliver lumpy returns, with crashes and surges along the way, and the final figure is highly sensitive to the rate you pick, so try a more cautious number and see how much the pot shrinks. The projection also ignores two real drags. Inflation means $4.17 million in twenty years buys less than it does today, so a return after inflation is the more honest lens. And fund fees compound against you the same way returns compound for you; a one percent annual fee can quietly remove a large slice of the gain over two decades, which is worth checking with a fee-impact tool. None of these is a tax, though. The tax line genuinely is zero, because Hong Kong levies no capital gains tax on a buy-and-hold investor.
Common questions
Is dollar-cost averaging actually better than investing a lump sum?
Not usually on pure returns, but often better in practice. Historically, investing a lump sum as soon as you have it tends to beat drip-feeding it in, simply because markets rise more often than they fall, so money in sooner compounds longer. Dollar-cost averaging wins on behaviour: it removes the temptation to wait for a better moment, it smooths the emotional ride, and it matches how most people are actually paid, monthly. For someone investing out of salary rather than a windfall, it is the natural and disciplined approach this calculator models.
Could frequent trading turn my gain into a taxable one?
It could. The tax-free treatment rests on you being an investor, not a trader. If you buy and sell often, hold for very short periods and run the activity like a business, the Inland Revenue Department could treat the profits as revenue and assess them to profits tax instead. A genuine monthly buy-and-hold plan, held for years, sits firmly on the investor side of that line. Keep the discipline this tool assumes and the zero-tax outcome holds; churn the portfolio aggressively and you risk losing it.