Holding for a year changes your tax bill

There is a date in your investment records that can be worth thousands of dollars, and nothing about it appears on your statement. It is the day you bought — because holding for more than a year changes which tax system applies to your profit.

Two systems, one asset

Short-term gains — assets held a year or less — are taxed as ordinary income, at exactly the same rates as your salary. There is no tax advantage to investment profit here at all.

Long-term gains — held more than a year — are taxed on a separate, deliberately gentler schedule with brackets of 0%, 15%, and 20% depending on your income. Many ordinary earners pay 15%; some pay nothing.

The boundary is more than one year, not a calendar year. Buy on 10 March and you must sell on 11 March of the following year or later.

What two days can cost

The same asset: bought for $40,000, sold for $95,000 — a gain of $55,000 — by someone earning $120,000.

• Sold at 11 months — short-term. Estimated tax $12,100, an effective 22.0% of the gain. Net proceeds $82,900.
• Sold at 13 months — long-term. Estimated tax $8,250, an effective 15.0% of the gain. Net proceeds $86,750.

Waiting produces $3,850 more in your pocket for the same investment, the same price, and the same decision — made two months apart.

Why the system is built this way

The favourable long-term rate is a deliberate policy choice intended to encourage patient investment rather than rapid trading. Whether it succeeds is arguable; that it exists is not, and you may as well be on the right side of it.

It is also why frequent trading is doubly costly. Beyond the spreads and the difficulty of being right repeatedly, every profitable trade inside a year is taxed at your highest rate. A strategy needs to clear that bar before it beats simply holding.

The things that change the answer

Losses offset gains. Sell a loser and it nets against your winners. Losses beyond your gains can offset a limited amount of ordinary income each year, with the rest carried forward. Deliberately realising losses to reduce a tax bill is called tax-loss harvesting, and it is one of the few genuinely free improvements available.

Tax-advantaged accounts sidestep all of it. Inside a 401(k) or IRA there is no capital gains tax on trades at all. This is why rebalancing belongs in those accounts where possible — the same transaction is taxable in a brokerage account and invisible in a retirement one.

Your income sets the bracket. The long-term rate depends on total taxable income, so a large gain can push part of itself into a higher band. A year with low income — between jobs, early retirement — can be an unusually good year to realise gains.

Primary homes get their own rules. A substantial amount of gain on a home you have lived in can be excluded entirely, subject to conditions on how long you owned and occupied it. That is a separate regime from the one above.

The practical rule

Before selling anything at a profit, check the purchase date. If you are within a few weeks of the one-year mark, the wait is almost always worth it — you are being paid $3,850 in this example to do nothing.

The exception is when the investment case has genuinely changed. Do not hold a position you believe is falling apart purely to reach a tax boundary. Tax should shape the timing of a decision, not the decision itself.

Estimates use 2026 long-term capital gains brackets for a single filer. State capital gains tax is separate — several states tax gains as ordinary income, which can materially change the comparison.