How taxes on investment income change returns

Taxes reduce investment returns because the income an investment produces, and the profit you make when you sell it, can both be taxed. An investment that gains 8 percent in a year does not necessarily leave you with 8 percent, and a bond fund that pays interest may deliver less than its stated yield once the tax bill arrives. How much tax applies depends on the kind of income, how long you held the investment and the type of account that holds it.

Taxes are often more predictable than they first appear, which means they can be planned around. Many investors only notice them when they file a return, after the decisions that caused them have already been made. Learning the basic categories before you buy helps you judge an investment by its after-tax result rather than its headline return. Tax rules differ by country and change over time, so the details below are general. A qualified tax professional can explain how the rules apply to your own situation.

Three kinds of investment income

Investments can produce three main kinds of taxable money. Interest is paid by bonds, savings accounts and some other holdings. Dividends are payments that companies and some funds make out of their earnings. Capital gains arise when you sell an investment for more than you paid for it. In the United States, interest is generally taxed as ordinary income in the year you receive it, the same way wages are taxed. Some dividends, called qualified dividends, generally receive the lower rates that apply to long-term capital gains when certain holding-period conditions are met. Other dividends are taxed as ordinary income.

Interest from some municipal bonds is generally exempt from federal income tax in the United States, which can change whether a particular bond makes sense in a taxable account. Whether that exemption also applies to state and local taxes depends on where you live. Checking the tax characteristics of an investment before you buy it is a habit that many investors skip.

Why the holding period changes the bill

Capital gains are generally taxed when you realize them, which usually means when you sell. A stock that rises in value and that you keep holding has an unrealized gain, and no tax is normally due on it yet. In the United States, gains on investments held for one year or less are generally short-term and taxed as ordinary income. Gains on investments held longer than one year are generally long-term and usually taxed at lower rates. The gap between the two treatments can be large, so the date you sell can matter as much as the price.

Losses work in the opposite direction. A realized loss can generally offset gains, and in many tax systems a net loss can offset some other income, subject to annual limits. The United States also has a wash-sale rule. If you sell an investment at a loss and buy a substantially identical one within 30 days before or after the sale, the loss is generally disallowed for that tax year. Investors who sell for tax reasons often overlook this rule, so check it before trading.

How funds can create taxes you did not expect

Owning a fund in a taxable account can create a tax bill even if you never sell your shares. Many mutual funds, and some exchange-traded funds, distribute capital gains that they realized when managers sold holdings during the year. Those distributions are generally taxable in the year they are paid. They may also be reinvested automatically, which means you can owe tax on money you never received as cash. Funds with high portfolio turnover, where many holdings are sold and replaced within a year, tend to produce larger distributions.

This is one reason the same fund can produce different after-tax results for different investors. A fund's distribution history appears in its annual reports, and it is worth reviewing before you buy into a taxable account. Holding a fund in a tax-advantaged account can avoid these annual taxable distributions, although the rules of that account then apply.

Account type changes when taxes are paid

The type of account that holds an investment often matters as much as the investment itself. Tax-deferred retirement accounts generally let investments grow without annual tax on interest, dividends or gains. Taxes are typically paid when money is withdrawn, and withdrawals are generally taxed as ordinary income. Some retirement accounts are funded with after-tax money, and qualified withdrawals from them can be tax-free, subject to the account's rules. A standard taxable brokerage account offers no such shelter, so income and gains are taxed as they occur.

Many investors use this difference when deciding where to hold each investment, a practice often called asset location. Holdings that produce a lot of taxable interest may be placed where that interest is sheltered, while holdings that generate few annual taxable distributions may sit comfortably in a taxable account. Withdrawing money early from a tax-advantaged account can bring additional taxes and penalties, depending on the rules that apply.

Using tax information without chasing tax savings

Tax efficiency is a useful lens, but it should not override everything else. An investment that is tax-efficient but poorly diversified or expensive may still leave you with less than a simpler alternative. Selling only to change an investment's tax result can add trading costs, cause you to miss a market recovery and create a taxable gain that waiting would have deferred. Start with the risk, cost and time horizon that fit your goals, and then examine the after-tax picture.

A practical starting point is a short note for each holding that lists the taxable income it produces, the account that holds it and how long you expect to keep it. Review the note once a year, and again after large gains or losses. For decisions involving significant money, a qualified tax professional can apply the applicable rules to your circumstances, something general information cannot do.