A capital gains tax (CGT) is the tax on profits realised on the sale of a non-inventory asset. The most common capital gains are realised from the sale of stocks, bonds, precious metals, real estate, and property.
Not all countries impose a capital gains tax, and most have different rates of taxation for individuals compared to corporations. Countries that do not impose a capital gains tax include Bahrain, Barbados, the Cayman Islands, the Isle of Man, Jamaica, New Zealand, Singapore, and others. In some countries, such as New Zealand and Singapore, professional traders and those who trade frequently are taxed on such profits as a business income.
Capital gains taxes are payable on most valuable items or assets sold at a profit. Antiques, shares, precious metals and second homes could be all subject to the tax if the profit is large enough. This lower boundary of profit is set by the government, and if the profit is lower than this limit it is tax-free. The profit is in most cases the difference between the amount (or value) an asset is sold for and the amount it was bought for.
The tax rate on capital gains may depend on the seller's income. If any property or asset is sold at a loss, it is possible to offset it against annual gains. For equities, national and state legislation often has a large array of fiscal obligations that must be respected regarding capital gains.
As an obstacle to sale The CGT can be considered a cost of selling which can be greater than, for example, transaction costs or provisions. The literature provides information that barriers for trading negatively affects the investors' willingness to trade, which in turn can change asset prices.
Companies with tax-sensitive customers are particularly reactive to capital gains tax and its change. CGT and changes to it affect trading and the stock market. Investors must be ready to react sensibly to these changes, taking into account the cumulative capital gains of their customers. Sales can be delayed due to unfavorable market conditions caused by capital gains tax. A study by Li Jin (2006) showed that a high capital gains tax may discourage selling, though a low capital gains tax can stimulate trade and incentivize investors to sell. "It is easy to show that to be willing to sell now the investor must believe that the stock price will go down permanently. Thus, a capital gains tax can create a potentially large barrier to selling. Of course, the foregoing calculation ignores the possibility that there might be another tax-timing option: Given capital gains tax rates fluctuate over time, it might be worthwhile to time the realization of capital gains and wait until a subsequent regime lowers the capital gains tax rate."
Locked-in effect Because capital gains are taxed only upon realization, an individual who owns a security that has increased in value may be less likely to sell it. The seller knows that when sold, tax is levied on the positive difference of the price at which the security was bought and the price at sale. If the seller chooses not to sell, the tax is postponed to later date. Postponing allows more time for the security to grow in value and generate returns. If the seller delays the sale, though the absolute value of the tax is greater than if they had not delayed, the present discounted value of the tax is reduced; thus allowing the security to grow undoes the tax. Therefore, the seller has an incentive to hold the securities longer than they would have without capital gains tax. This distortion has been called the locked-in effect or lock-in effect.
Martin Feldstein, former chairman of the Council of Economic Advisers under President Reagan has claimed that the effect is so large that reducing the capital gains tax would lead individuals to sell securities that they previously had refused to sell, to such an extent that government revenues would actually increase. 1994 estimates suggest that a permanent reduction in the capital gains tax rate would have little effect.
Investment behaviour
Asset allocation Capital gains tax systems have been argued to create distortions in portfolio allocation, as investors may favour assets with preferential tax treatment over higher-return investments subject to ordinary income rates. Some analysts observe that this can shift capital toward tax-advantaged vehicles such as municipal bonds or real estate investment trusts even when these offer lower pre-tax returns. Critics contend that such outcomes reduce economic efficiency by directing capital based on tax considerations rather than underlying economic fundamentals, though proponents of preferential treatment argue it serves legitimate policy goals such as encouraging long-term investment.
Timing of asset sales Investors may cluster asset sales around tax year boundaries and coordinate disposals with capital losses to minimize tax liability. This timing behavior has been associated with periods of reduced transaction volume when tax consequences are unfavorable, and with increased activity when conditions are advantageous. Some economists suggest this bunching effect can amplify market volatility and reduce the stabilizing influence of continuous trading.
Revenue and distribution
Contribution to total tax revenue In the United States, capital gains tax receipts have historically represented a modest and variable share of federal revenue. According to the Congressional Budget Office, such receipts are typically between 2% and 3% of total federal receipts, and normally account for approximately 4% to 7% of individual income tax revenues, though the proportion fluctuates significantly with asset market conditions. Revenue from this source remains modest relative to income and payroll taxes, reflecting the concentrated ownership of capital assets among higher-income taxpayers.
Burden across income levels Capital gains tax liability is highly concentrated among high-income taxpayers; in the United States, the top 1% of earners have accounted for approximately 75% of total capital gains tax paid. This concentration reflects the unequal distribution of capital assets rather than rate progressivity alone, as middle-income households hold most of their wealth in primary residences, which are often exempt or treated separately. The effective burden also varies based on asset composition, with higher-income investors generally having greater access to tax planning strategies.
Wealth concentration The relationship between capital gains taxation and wealth concentration is debated. Higher rates may limit wealth accumulation through asset appreciation, while the preferential treatment of investment income relative to wage income has been argued to advantage those who derive income primarily from capital. Exemptions for primary residences and retirement accounts provide wealth-building opportunities across income levels, while sophisticated tax planning strategies tend to be more accessible to high-net-worth investors.
Intergenerational equity Capital gains taxation intersects with intergenerational wealth transfer through the treatment of inherited assets. In the United States, step-up basis provisions reset the cost basis of inherited assets to their value at the time of the owner's death, eliminating any capital gains tax on appreciation during the decedent's lifetime. This has been characterized by some as advantaging wealthy families able to hold assets until death, compared with those who must realize gains during their lifetime. The overall burden on intergenerational wealth transfer depends on the interaction between capital gains and estate tax systems.
Impact on entrepreneurship Capital gains taxation affects the after-tax returns to successful business ventures and startup investments, which some argue discourages risk-taking. Policy recognition of this concern is reflected in provisions such as the qualified small business stock exclusion in the United States, which offers preferential treatment to offset investment risks. The timing of capital gains recognition may also influence decisions about when entrepreneurs sell businesses or take companies public.
Compliance and administration
Tax return filing obligations In most jurisdictions, taxpayers are required to report capital gains and losses on designated tax forms within specified timeframes following the tax year in which the disposal occurred. Annual reporting is generally required regardless of whether gains or losses were realized, with specific schedules dedicated to capital transactions. Reporting obligations typically extend to all qualifying asset disposals including securities, real estate, and business assets, with different forms used for different asset categories depending on the jurisdiction's tax structure.
Record-keeping requirements Taxpayers are generally required to report capital gains and losses on designated forms within specified timeframes following the tax year of disposal, with most jurisdictions requiring annual reporting through dedicated schedules. Comprehensive records must be maintained for all capital asset transactions – including acquisition dates, costs, improvement expenses, and disposal details — for minimum periods typically ranging from three to seven years after the relevant filing date.
Disclosure of foreign assets International tax compliance in many jurisdictions requires disclosure of foreign capital assets and related gains through specialized reporting forms capturing cross-border transactions. Taxpayers holding foreign securities, real estate, or business interests above specified thresholds may be required to file additional schedules detailing asset locations, values, and disposal proceeds.
Administrative expenses With collecting of any type of tax come administrative costs associated with collecting, administering and managing the collection of capital gains taxes. These costs are directly incurred by governments that collect taxes, and ultimately its citizens. Unfortunately, no studies (at least that Fraser Institute researchers knew of in 2007) specifically analyze the costs associated with capital gains taxes.
Canadian researcher Francois Vailancourt in 1989 examines the administrative costs associated with personal income taxes and two payroll taxes (CPP/QPP and UI). The costs include processing costs, administration and accommodation costs, capital expenses, and litigation costs. These costs represented roughly 1% of the gross revenues collected by these three tax sources. The paper does not show exactly what costs are incurred by capital gains tax.
Compliance costs Tax compliance costs are incurred when fulfilling the recording and filing requirements associated with paying a tax. These costs include such expenses as bookkeeping, reporting, calculating, and remitting tax payments. A study from 1992, which may be outdated due to technological advancements, found that American taxpayers who received capital gains income incurred higher compliance costs than those who did not. From a survey of 2,000 Minnesota households, the authors found that having capital gains increased the time individuals spent on paying taxes by 7.9 hours, increased the money they spent on professional tax assistance by about $21, and increased the total cost of compliance by $143 per taxpayer (not adjusted for inflation) per year.
Altogether the study concludes that very few studies measure compliance costs associated with capital gains tax, but those few that do clearly indicate that compliance costs are not insignificant. Therefore, the costs must be taken into consideration when assessing tax policy.
Tax avoidance or deferrence Taxpayers may defer capital gains taxes by simply deferring the sale of the asset. Depending on the specifics of national tax law, taxpayers may be able to legally reduce, or avoid capital gains taxes using the following strategies: