Taxes for Investors Glossary
Taxes for Investors Glossary
This glossary defines the core terminology you'll encounter when managing investment taxes. Whether you're reading about holding periods, cost basis calculations, or account placement strategies, you'll find clear definitions and practical examples here. Each term is explained in plain language, with concrete situations that show how the concept applies to real investment decisions.
Adjusted Cost Basis
The cost basis of an asset after accounting for corporate actions, dividends, and other adjustments.
When a company performs a stock split, your adjusted cost basis changes to reflect the new share count. Similarly, if you reinvest dividends, each dividend addition increases your adjusted cost basis for that holding. Computing adjusted cost basis correctly is essential for accurate capital gain calculations when you sell. Your brokerage statement often tracks this automatically, but understanding the adjustments ensures you catch errors.
Asset Location
The strategic placement of specific investments across different account types to minimize taxes.
Asset location is the complement to asset allocation. While allocation decides what percentage goes into stocks versus bonds, location decides where each investment sits—taxable account, traditional IRA, or Roth IRA. For example, placing tax-inefficient bond funds in an IRA while holding tax-efficient stock index funds in a taxable account reduces your overall tax drag. Proper asset location can add 0.5 to 1 percent in after-tax returns over time.
Capital Gain
The profit realized when you sell an investment for more than you paid for it.
If you bought a stock for $50 and sold it for $80, your capital gain is $30. Capital gains can be short-term (held <1 year) or long-term (held ≥1 year), and each category is taxed differently. Long-term capital gains typically receive preferential tax treatment, making the holding period a crucial tax planning consideration.
Capital Loss Carryforward
The ability to apply unused capital losses to future years, up to $3,000 per year against ordinary income.
When you sell investments at a loss, you can use those losses to offset capital gains in the same year. If losses exceed gains, you can deduct up to $3,000 against ordinary income. Any remaining losses roll forward to future years indefinitely. For example, if you realize $15,000 in losses in one year and have no gains, you deduct $3,000 and carry forward $12,000 to use in subsequent years.
Cost Basis
The original purchase price of an investment, used to calculate capital gains or losses when you sell.
Cost basis is literally what you paid: if you bought 100 shares at $25 per share, your total cost basis is $2,500. When you sell those shares at $40 per share for $4,000, your capital gain is $1,500. Accurately tracking cost basis across all purchases, splits, and reinvested dividends is fundamental to tax reporting.
Dividend
A payment made by a corporation to its shareholders, typically from profits or accumulated reserves.
Dividends are usually paid in cash, though they can be reinvested automatically to purchase additional shares. They are taxable in the year received, even if reinvested. There are two types for tax purposes: qualified dividends (taxed like long-term capital gains) and ordinary dividends (taxed as ordinary income). A company might pay a quarterly dividend of $0.50 per share, resulting in taxable income for shareholders in that quarter.
Estate Tax
A federal tax on the transfer of property when an individual passes away, applicable to estates exceeding the exemption threshold.
The federal estate tax exemption is adjusted annually for inflation. In 2024, it stood at over $13 million per person. Estates below the exemption owe no federal estate tax; those exceeding it face rates up to 40 percent. Proper planning—such as gifting, trusts, or charitable donations—can reduce or eliminate estate tax liability for high-net-worth individuals.
FIFO
First-in, first-out: a cost basis method where the oldest shares purchased are considered sold first.
FIFO is the default cost basis method for most brokerages. If you bought 100 shares in January, then 100 more in March, and sold 100 shares in June, FIFO assumes you sold the January shares. This method often results in higher capital gains when prices rise over time. Many investors choose specific identification instead to optimize their tax outcomes.
Foreign Tax Credit
A tax credit reducing U.S. tax liability by the amount of foreign taxes paid on foreign investment income.
If you own foreign stocks that pay dividends and foreign taxes are withheld, you can claim a credit for those taxes against your U.S. tax liability. This prevents double taxation of the same income. The calculation is complex, particularly when foreign taxes exceed your U.S. liability, and requires careful Form 1118 preparation.
Form 1099-B
A tax form reporting the proceeds from the sale of securities in a brokerage account.
Your brokerage sends you a Form 1099-B annually, summarizing all security sales. It includes the proceeds, but may not always include accurate cost basis (especially for older purchases). You use this form to complete Schedule D and calculate your net capital gains or losses. Ensure the proceeds amount matches your actual sale prices.
Form 1099-DIV
A tax form reporting dividend income and foreign taxes paid on investments.
If you receive dividends of $10 or more from a single payer, the payer must send you a Form 1099-DIV. It breaks down ordinary dividends, qualified dividends, capital gain distributions, and foreign taxes. You report these amounts on your tax return and potentially claim a foreign tax credit. Mutual funds and REITs are common sources of 1099-DIV income.
Form 8949
A form used to report the details of capital gains and losses from the sale of securities or other assets.
Form 8949 is where you list each capital gain or loss transaction, along with the acquisition date, sale date, proceeds, cost basis, and gain or loss amount. It ties into Schedule D, which summarizes your net long-term and short-term gains or losses. Accurate preparation of Form 8949 is essential for proper tax reporting.
Gift Tax
A federal tax on the transfer of property by gift during a person's lifetime.
Gift tax generally applies when a gift exceeds the annual exclusion amount (indexed annually; $18,000 in 2024). Even large gifts between spouses or to qualified charities are exempt. Unused exemption room carries forward to the estate tax exemption. Proper gifting strategies can help high-net-worth individuals transfer wealth tax-efficiently.
Holding Period
The length of time an investment has been held, determining whether gains are classified as short-term or long-term.
A holding period of one year or less results in short-term capital gains, taxed as ordinary income. A holding period exceeding one year results in long-term capital gains, typically taxed at 0, 15, or 20 percent depending on income. The calculation begins the day after purchase and ends on the sale date. Even holding an investment for 366 days qualifies for long-term treatment.
K-1
A partnership tax form reporting each partner's share of income, deductions, credits, and losses.
Limited partners in partnerships, LLCs, and S-corporations receive K-1 forms rather than W-2s. The K-1 breaks down ordinary business income, capital gains, guaranteed payments, and various deductions. You must report K-1 income on your tax return and may owe estimated taxes even if you receive no cash distribution. A real estate partnership might show $50,000 in K-1 income, requiring a $10,000 estimated tax payment.
Long-Term Capital Gain
A profit on the sale of an asset held for more than one year, eligible for preferential capital gains tax rates.
Long-term capital gains are taxed at 0, 15, or 20 percent federally, depending on your taxable income—far lower than ordinary income rates of up to 37 percent. If you bought a stock for $100 in January 2023 and sold it for $150 in February 2024, the $50 gain qualifies for long-term treatment. This preferential rate makes holding periods strategically important for tax planning.
Marginal Tax Rate
Your highest applicable tax bracket, representing the tax rate on your last dollar of income.
If you earn $90,000 and fall into the 22 percent bracket, your marginal rate is 22 percent. Every additional dollar of income is taxed at 22 percent until you move into the next bracket. Understanding your marginal rate helps you assess the tax cost of realizing gains or benefits of harvesting losses. It's also crucial for evaluating the value of deductions.
MLP
Master Limited Partnership: a publicly traded partnership structure common in energy and infrastructure sectors.
MLPs operate as pass-through entities, distributing most of their cash flow to unit holders quarterly. These distributions are often partially a return of capital, reducing your cost basis and creating tax deferral. However, MLPs generate phantom income and K-1 forms, making them complex for taxable accounts. An oil pipeline MLP might distribute $3 per unit quarterly, with only $1.50 taxable as ordinary income.
Municipal Bond
A debt security issued by a state, city, or other local government, typically offering tax-free interest income.
Interest on municipal bonds is exempt from federal income tax and often from state and local income tax if issued in your home state. Municipal bonds pay lower yields than taxable bonds because of this tax advantage. For high-income investors, municipal bonds can be very tax-efficient. A municipal bond yielding 3 percent may be equivalent to a 5 percent taxable bond for someone in the 40 percent combined tax bracket.
Net Investment Income Tax
A 3.8 percent tax on net investment income for high-income individuals, in addition to capital gains and ordinary income taxes.
The Net Investment Income Tax (NIIT) applies to single filers with modified adjusted gross income exceeding $200,000 and married filers exceeding $250,000. It covers capital gains, dividends, interest, and rental income. If you realize $100,000 in long-term capital gains and are subject to NIIT, you owe an additional $3,800 in tax beyond the regular capital gains tax.
OID
Original Issue Discount: the difference between a bond's face value and its lower issue price.
A bond issued at $900 with a $1,000 face value has $100 of OID. You must recognize this discount as income annually, even though you don't receive the cash until maturity. This creates phantom income—you owe tax on income you haven't received. Zero-coupon bonds are extreme examples; they offer no coupons and the entire return is OID.
Ordinary Dividend
Dividend income taxed at ordinary income tax rates rather than the preferential long-term capital gains rates.
Ordinary dividends include most corporate dividends not meeting the holding period requirements for qualified status, as well as dividends from REITs and preferred stocks. They are also taxed at ordinary income rates up to 37 percent. Your Form 1099-DIV breaks down qualified and ordinary dividends separately.
Ordinary Income
Income subject to standard tax rates ranging up to 37 percent, including wages, interest, and certain dividends.
Ordinary income includes W-2 wages, self-employment income, interest, ordinary dividends, and short-term capital gains. It is taxed more heavily than long-term capital gains and qualified dividends. If you earn $100,000 in wages and have $50,000 in short-term gains, all $150,000 is subject to ordinary income tax rates.
Phantom Income
Taxable income on which you owe tax despite receiving no corresponding cash.
Phantom income commonly arises from K-1 entities (partnerships, MLPs, S-corporations) and certain bonds (OID). It can also result from unmarketable securities or deferred compensation arrangements. A partner might owe $20,000 in taxes on phantom income from a business in which he received no distribution, creating cash flow strain.
PFIC
Passive Foreign Investment Company: a foreign corporation with a high proportion of passive income, subject to special U.S. tax rules.
U.S. citizens owning PFIC stock must follow special tax regimes, often resulting in ordinary income treatment and complex Form 8621 calculations. PFICs can trap long-term capital gains in ordinary income tax rates. Many advisors recommend avoiding PFICs in taxable accounts or using the qualified electing fund election.
Qualified Dividend
Dividend income eligible for long-term capital gains tax rates, typically 0, 15, or 20 percent.
Qualified dividends must come from eligible corporations and be held for the required holding period (generally 60 days surrounding the ex-dividend date). Most U.S. corporate dividends and many foreign dividends qualify. Your broker or Form 1099-DIV identifies qualified versus ordinary dividends.
Realized Gain
A capital gain that has been recognized through the actual sale or disposal of an investment.
Once you sell an investment, the gain (or loss) is realized and must be reported on your tax return. Until then, a gain is only unrealized. If you bought a stock for $100 and it is now worth $150, you have an unrealized $50 gain, but no tax is owed. When you sell at $150, the gain is realized and becomes taxable.
REIT
Real Estate Investment Trust: a corporation that invests primarily in real estate and distributes at least 90 percent of income to shareholders.
REITs are pass-through entities providing real estate exposure with liquidity. However, REIT dividends are typically taxed as ordinary income, not qualified dividends. They also often pay return of capital distributions that reduce your cost basis. A REIT yielding 4 percent might distribute $1.50 as ordinary income and $0.50 as return of capital.
Return of Capital
A distribution that reduces your cost basis rather than creating taxable income, deferring tax until you sell.
A return of capital is not income; it's a partial return of your original investment. It reduces your cost basis, meaning when you eventually sell, your gain will be larger. Many master limited partnerships and some REITs pay significant returns of capital. If you bought shares for $100 and receive a $20 return of capital, your new basis is $80.
Roth Account
A retirement account where contributions are not deductible, but qualified distributions are tax-free.
Roth IRAs and Roth 401(k)s offer tax-free growth and withdrawals in retirement. Contributions are made with after-tax dollars, but the account grows tax-sheltered. Unlike traditional accounts, Roth accounts have no required minimum distributions during the account owner's lifetime. A $10,000 investment in a Roth IRA grows tax-free, and all withdrawals in retirement are tax-free.
Section 199A Deduction
A 20 percent deduction on qualified business income for pass-through entities and sole proprietors, subject to income limitations.
Section 199A allows eligible taxpayers to deduct 20 percent of their qualified business income (QBI) from partnerships, S-corporations, and sole proprietorships. High-income taxpayers face limitations based on business type and taxable income thresholds. If you have $200,000 in QBI, you might deduct $40,000, reducing your taxable income. The deduction expires after 2025 unless extended.
Short-Term Capital Gain
A profit on the sale of an asset held for one year or less, taxed as ordinary income at rates up to 37 percent.
Short-term capital gains are taxed like wages and other ordinary income, at your marginal rate. This makes the holding period critical for tax planning. If you buy a stock in December and sell in January for a profit, the gain is short-term and fully taxable at ordinary rates. Many active traders face substantial short-term gains that consume ordinary income tax room.
Specific Identification
A cost basis method allowing you to choose which shares are sold, optimizing your capital gains or losses.
Specific identification lets you sell your highest-cost shares first, minimizing gains. You must identify which shares are sold at the time of sale and maintain records. If you bought 100 shares at $20 and 100 more at $30, and sell 100 shares at $40, you can specify selling the $30 shares to minimize your $10 per share gain. This method requires more paperwork but offers superior tax control.
Step-Up in Basis
The increase in an asset's cost basis to its fair market value at the date of death.
When you inherit an asset, your cost basis is stepped up (or stepped down) to its fair market value on the date of death. This eliminates all unrealized gains that existed at death. If you inherited stock worth $100,000 that had an original cost basis of $20,000, your new basis is $100,000, and the $80,000 gain is permanently tax-free if you sell immediately.
Tax Drag
The reduction in after-tax returns caused by taxes paid on investment income and gains.
Tax drag includes capital gains taxes, dividend taxes, and taxes on ordinary income. Asset location and tax-loss harvesting strategies reduce tax drag. A portfolio returning 8 percent before tax but 6.5 percent after tax is experiencing 150 basis points of tax drag. Minimizing tax drag is a key element of long-term wealth building.
Tax Deferral
The postponement of tax liability to a future year through various strategies and account structures.
Deferral accounts like traditional IRAs, 401(k)s, and deferred compensation plans defer taxes on earnings until withdrawal. Return of capital distributions and OID bonds create involuntary deferrals. Deferral compounds the advantage of tax-free growth, but deferred taxes must eventually be paid. Deferring $10,000 in taxes for 20 years at 5 percent growth means that money compounds to $26,533.
Tax-Loss Harvesting
The strategic sale of securities at a loss to offset capital gains or up to $3,000 of ordinary income annually.
Tax-loss harvesting crystallizes losses that can reduce your tax bill. After harvesting, you can repurchase a similar (but not substantially identical) security to maintain your market exposure. If you have $25,000 in realized gains and harvest $25,000 in losses, they net to zero, saving potentially $3,750 to $9,250 in federal tax. Wash sale rules prevent you from repurchasing the exact same security for 30 days.
Tax Lot
A specific batch of shares purchased at a particular time, tracked separately for cost basis and tax reporting purposes.
Your portfolio typically contains multiple tax lots of the same security, each with a different purchase date and cost basis. Tracking tax lots allows you to use specific identification to select which shares to sell. A holding of 1,000 Apple shares might consist of 300 shares bought at $100, 400 at $120, and 300 at $130—three separate tax lots.
Taxable Equivalent Yield
The yield of a taxable bond that would provide the same after-tax return as a tax-exempt security.
Taxable equivalent yield accounts for your tax rate. A municipal bond yielding 3 percent has a taxable equivalent yield of 5 percent for someone in the 40 percent tax bracket. This metric helps you compare taxable and tax-exempt investments fairly. Calculating taxable equivalent yield is essential for deciding between municipal and corporate bonds.
Unrealized Gain
A profit on an investment that has not yet been sold, and therefore is not yet taxable.
An unrealized gain represents only a paper profit until you sell. A stock you bought for $50 now worth $80 shows an unrealized $30 gain, but you owe no tax. If you sell at $80, the gain becomes realized and taxable. Unrealized gains allow you to defer taxes indefinitely if you do not sell.
Wash Sale
A sale of securities at a loss followed by the purchase of substantially identical securities within 30 days, disallowing the loss.
Wash sale rules prevent you from claiming a loss if you buy the same or substantially identical security within 30 days before or after the sale. The disallowed loss is added to your cost basis of the new shares. If you sell Microsoft at a $5,000 loss on December 15 and buy it back on January 10, the loss is disallowed and your new basis increases by $5,000.
Withholding Tax
A tax collected and remitted by a payer on behalf of the recipient, such as taxes withheld from dividends or wages.
Withholding taxes are preliminary tax payments made during the year on earned and investment income. Dividend withholding, estimated tax withholding, and W-2 withholding are common forms. At year-end, your actual tax liability is calculated and reconciled with withholding; you either owe additional tax or receive a refund. If your employer withholds $3,000 but you actually owe $2,500, you receive a $500 refund.