What are capital gains?

A capital gain is the profit you make when you sell an investment for more than you paid for it. If you buy a share for $40 and sell it for $60, the $20 difference is a capital gain; if you sell for $30, the $10 difference is a capital loss.

Realized vs. unrealized: the gain only counts when you sell

A gain is unrealized (a "paper" gain) while you still hold the investment — it can grow or vanish before you do anything. It becomes realized only when you actually sell. This distinction matters because in most tax systems only a realized gain is a taxable event: watching a holding rise on screen does not itself create a tax bill.

Holding period usually changes the tax treatment

Many tax systems tax gains on investments held a short time (often under a year) at a higher rate than gains on investments held longer — a deliberate incentive to invest for the long term. The exact thresholds, rates, and rules vary by country and change over time, so treat this as general education, not tax advice, and check the current rules for your own jurisdiction.

How this connects to Quantustik

Because a gain is only realized when you sell, exit timing is a first-class decision, not an afterthought — the same idea behind our take-profit and stop-loss framing and realized return. Frequent trading also realizes gains more often, which can raise your tax drag versus holding. None of this is investment or tax advice.

Frequently asked questions

When is a capital gain taxed?

In most tax systems a gain is taxable only when it is realized — that is, when you actually sell. An unrealized gain on a holding you still own is generally not a taxable event. Rules vary by jurisdiction; this is not tax advice.

What is the difference between a realized and an unrealized gain?

An unrealized (paper) gain is the increase in value of something you still hold and can still lose. A realized gain is locked in when you sell. Only realized gains put cash in hand — and, in most systems, only they are taxed.

Does how long I hold affect my capital gains?

Often yes. Many tax systems apply a lower rate to gains on investments held longer (commonly over a year) than to short-term gains, to reward long-term investing. Check the current rules for your own country.