Cost Basis Defined: The Ultimate 101 Guide (2024)

Revenue from sales of products or services is just one source of income for a business. Asecond income stream for many businesses is non-operating revenue from capital assetinvestments. Any business can hold capital investments, and many nonprofits rely on them forrevenue. Businesses can realize profits or losses in either revenue steam — but whenitcomes to capital assets, cost basis is the key to how a business calculates its gains andlosses.

There’s a wide spectrum of capital asset types in which businesses can invest,beginning withthe stocks, bonds and money market funds where many park cash-on-hand until needed. Butfactories and equipment are also capital assets, as are goodwill, patents and copyrights.Cost basis is the key to determining the gain or loss for all these capital assets.

What Is Cost Basis?

Just as a business calculates the costs in creating products, it must keep careful records onthe purchase of each capital asset, which is called the asset’s cost basis. The costbasiscan change over time as depreciation is taken or capital improvements are made.

Cost basis vs tax basis — what’s the difference?

When the business disposes of a capital asset, it calculates and reports to the IRS thecurrent adjusted cost basis of the asset, which is also called the tax basis. The profit or loss from the business’sinvestment in that asset is the difference between the sale price and the tax basis.

Key Takeaways

  • Cost basis is the original price of a capital asset plus any costs associated withbuying the asset.
  • Capital gains or losses are computed by subtracting the cost basis from the market valueat the time of sale.
  • A business can choose from multiple cost basis methods to calculate the capital gain orloss.

Cost Basis Explained

When a business acquires a capital asset, such as stocks or other securities, real estate oreven another business, the initial purchase price becomes the original cost basis of thatinvestment. This initial cost basis includes any costs of acquiring the investment, such asattorney and advisor fees in the case of an acquisition. Cost basis for an asset can changeover time for many reasons. Consider an office building: Taking depreciation lowers thebuilding’s cost basis, but the cost of a new roof (which eventually will be required)is acapital improvement that adds to the cost basis.

Why Is Cost Basis Important?

The cost basis of an asset is important because it’s used to determine tax liability.When acapital asset is sold, the sale price minus the cost basis determines whether the investmentis profitable. When an entire business is sold, the profit or loss of each capital assetmust be determined separately using each asset’s cost basis.

Cost Basis Methods

When a company buys multiple investments of the same type over time, such as shares of stockin the same company, determining the cost basis when the investments are sold can becomefairly convoluted. The order in which the shares are sold can greatly impact thebusiness’ultimate gain or loss. When selling securities such as stocks, the IRS allows you to reportusing the special identification or first in, first out methods.

  • First In, first out (FIFO):

    Using this method, stocks are sold in the order they were bought. If FIFO wereapplied to the example in the previous bullet, a business that sells 150 shareswould have a cost basis of $10 each for 100 shares and $25 for the rest, for a costbasis of $2,250. At a sale price of $35 per share, it would realize a gain of$3,000.

  • Specific identification (SpecID):

    Using this method, the company identifies the stocks to be sold by specifying theacquisition date and price. That way, it could sell a custom mix with a cost basisof $10, $25 or $30 to achieve a specific cost basis to suit its needs.

  • Average cost (AvgCost):

    This uses the average cost of all shares purchased as the cost basis. Using averagecost, if a business bought 100 shares of Company A’s stock at $10 per share,another100 at $25 and 200 more at $30, the average cost per share (and, therefore, yourcost basis for each share sold) would be $23.75 ($10 + $25 + $30 + $30 / 4). If thebusiness sold 150 shares at $35 per share, it would realize a gain of $1,687.50($5,250 - $3,562.50).

  • Highest in, first out (HIFO):

    In this method, the highest priced stocks are sold first. So selling 150 shares fromthe example above would result in a cost basis of $30 per share and a realized gainof $750.

  • Last in, first out (LIFO):

    With this method, the stocks purchased most recently are sold first.

The IRS does not formally recognize AvgCost, HIFO or LIFO. However, the SpecID method allowsfor some flexibility. For example, when SpecID is used to indicate the most recent sharesacquired, it’s essentially the LIFO methodology.

To decide which method works best for your business, you should consult a certified taxadvisor or financial planner. Once you decide upon a method, the key is to keep it ineffect.

How to Determine Cost Basis

The cost basis of an asset depends on the asset type and, in some cases, how the asset wasacquired. Here’s a breakdown of the most common assets and how the cost basis for eachisdetermined.

  • A business: The buyer divides the purchase price among all thecapital assets in the business, assigning a cost basis to each asset. The value ofan individual partner’s interest in a partnership is also considered a capitalasset.

  • Stocks and bonds: The purchase price is the initial cost basis,including any brokerage fees or commissions, plus reinvested dividends (if any).

  • Gifted assets: The cost basis of assets given to a business iseither the fair market value or the donor’s cost basis.

  • Inherited assets: The cost basis for inherited assets is the fairmarket value on the day the previous owner died.

  • Intangible assets: The cost basis for intellectual property, such aspatents, copyrights, trademarks, trade names and franchises, is the cost to createor acquire those assets. In an acquisition, the cost basis for goodwill is thedifference between the value of the company acquired and the amount paid for thebusiness.

How to Calculate Cost Basis

How a business calculates cost basis for capital assets can become fairly complex —sincedifferent factors can apply to different capital investments — but they all start withtheinitial purchase price plus any costs of acquiring the investment. The purchase priceincludes not only cash, but also any amounts paid in debt obligations, services or realestate. Costs to acquire the investment can include sales, real estate and excise taxes;shipping costs; installation and testing charges; and commissions and fees.

Cost basis calculations get more complicated over time, as a cost basis is adjusted bysubtracting or adding different factors. With stocks and bonds, for example, reinvesteddividends are added to the cost basis. For real estate, depreciation is subtracted from thecost basis and any capital improvements are added. Maintenance costs, however, are anoperating expense and do not affect the cost basis. So, a factory’s cost basis mightincludethe initial cost of construction, minus depreciation over time, plus the major refit fiveyears down the road — but not the salaries of the people who worked there all thoseyears.

Accuracy in Tax Reporting Cost Basis

Well-kept records are key to proving an asset’s cost basis to the IRS. When a capitalassetis sold, the gain or loss is calculated as the current market price minus the cost basis.

Why is cost basis reporting accuracy so important?

Cost basis reporting accuracy is vital because an asset’s adjusted cost basis becomesits taxbasis for computing tax liability when the asset is sold. If the difference is positive, thebusiness realizes a gain; if negative, it means a loss. The length of time the businessholds the capital asset is also important in computing tax liability. Any investment assetheld for more than one year is subject to capital gains tax, which could be 0%, 15% or 20%depending on the investor’s filing status and income for personal filings. Other taxrateswill apply for businesses. For example, the tax rate for a C-Corp is currently 21%,regardless of income. And for certain types of assets, the capital gains rates can be up to28%. Short-term investments — assets held for up to a year — are taxed ascapital gains. Thetax rate will be the same as the individual or corporate tax rate, but must be reportedseparately from income using a separate IRS form (8949) and 1049-D.

Choosing a Cost Basis Method

Certainly, the fair market value of an asset plays a large part in deciding which cost basismethod to use. FIFO is simple and has the virtue of maximizing gains if the asset value hasincreased while minimizing losses if the value has decreased. SpecID gives the company themost control in tax planning because specific shares can be selected for sale.

Pros and Cons of the Methods for Calculating Cost Basis

Cost Basis MethodProsCons
FIFOOften maximizes gains if the asset value has increasedOften minimizes losses if the asset value has decreased
SpecIDMost precise control of gains and lossesComplicated and requires careful records
*LIFOUsually results in a comparatively low tax burden with prices haveincreasedThe taxes that are incurred will often be taxed at higher short-termcapital gains rates
*HIFOMinimizes gains and maximizes lossesMay force short-term gains on recently acquired shares
*AvgCostSimplest methodDoes not maximize gains

Cost Basis Comparisons

The table below shows the impact of applying cost basis methods to two scenarios. In bothscenarios, Company A owns 300 shares of ABC company stock. The first 100 shares were boughtat $400 each, the second 100 shares at $200 each and the third 100 at $600. Now the companywants to sell 150 shares and must decide which of the basis methods to use to maximize gainsand minimize losses. The table shows how the methods compare in gains or losses for ascenario in which the share price has climbed to $700 and a second scenario in which theprice has fallen to $300. As the table makes clear, the different cost basis methods yielddifferent results in each scenario.

Cost Basis MethodShares Sold @ Cost BasisGain/(Loss) @ Selling Price = $700Gain/(Loss) @ Selling Price = $300
FIFO100 @ $400 and 50 @ $200$55,000 ($300 per share for 100 shares plus $500 pershare for 50) ($5,000) (+$100 per share for 100 and -$100 for 50)
SpecIDAny selection is possible. To maximize gains, let’s assume: 100 @$200and 50 @ $400 $65,000 ($500 per share for 100 shares plus $300 pershare for 50)$5,000 ($100 per share for 100 shares minus $100 pershare for 50)
*LIFO100 @ $600 and 50 @ $400$25,000 ($100 per share for 100 shares plus $300 pershare for 50)($35,000) ($300 per share for 100 shares and $100 pershare for 50)
*HIFO100 @ $600 and 50 @ $400 $25,000 ($100 per share for 100 shares plus $300 pershare for 50)($35,000) ($300 per share for 100 shares and $100 pershare for 50)
*AvgCost150 @ $400$45,000 ($300 per share)($15,000) (-$100 per share)

*Reminder: The IRS does not formally recognize AvgCost, HIFO or LIFO. However, the SpecIDmethod allows for some flexibility.

Examples of Cost Basis

Most stock transactions are straightforward. The cost basis is the price paid plus anycommissions, with little or no adjustment. In some special cases, however, such as mergers,stock splits and bankruptcies, the cost basis is affected by actions beyond thebusiness’scontrol.

  • Mergers:

    If a business owns stock in a company that merges with another company, the businessusually receives payment in stock, cash or a combination of stock and cash (calledcash to boot). With stock payments, the merging company determines the new number ofshares and market value, requiring an adjustment to the original cost basis. Anall-cash merger is effectively the same as selling all shares, and the gain or lossis calculated at that time using the original cost basis. In cash-to-bootsettlements, any fraction of a share resulting from the exchange ratio triggers acash payment for that fraction.

  • Stock splits:

    When stocks split, the total investment does not change. The current cost basis isdivided among the new number of shares. For example, in a 2-for-1 split, the costbasis of each share is cut in half.

  • Bankruptcies:

    If a business claims Chapter 7 bankruptcy, its shares lose all value. A loss cannotbe claimed until either the company’s stock is sold (often for a penny) or isdeclared to be worthless. In Chapter 11, however, the shares could continue to betraded and, depending on the settlement, the cost basis could remain unchanged.

Tracking and Reporting on Cost Basis With Software

Given the need for a high level of reporting accuracy to produce trusted cost basiscalculations for tax purposes, good business accounting software plays animportant role. Software can help businesses keep detailed records of costs and dates ofpurchase for their capital assets. A range of business accounting software is available fortracking not only operating revenue and expenses, but also the cost basis for capital assetsand other investments.

In addition to producing goods and services, businesses can realize a second stream ofrevenue from capital assets and capital investments. Many factors go into calculating thecost basis of an asset, including how it was acquired and the costs associated withacquiring it. Keeping careful records of the cost basis and acquisition dates of capitalassets is essential for calculating gains and losses when the assets are sold. Good businessaccounting software can help with all that record-keeping, tracking and, when the time comesto sell an asset, identifying the best cost basis method to use for tax planning purposes.

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Cost Basis FAQs

What does cost basis mean?

Cost basis is the total cost that an individual or business pays for a capital asset, whethera home, an office building or investment securities like stocks and bonds. It’s usedtocalculate the taxable gain or loss when the asset is sold.

How do you calculate cost basis?

Calculating cost basis can be simple or complex, depending on the circ*mstances. If you buyshares of a non-dividend-bearing stock from a no-fee online brokerage, your cost basis isthe price you paid. But if you paid a commission, or if you invest in dividend stocks, thenthose fees get added into the cost basis when you sell. With property, like a home or officebuilding, depreciation can lower the cost basis over time while capital improvements —forexample, a new roof or HVAC system — add to the cost basis.

Do you pay taxes on cost basis?

You don’t pay taxes on the cost basis of an asset, but cost basis is used to calculatethetaxable gain when an asset is sold. You pay tax on the difference between the sale price ofthe asset and the cost basis, i.e., Taxable gain = Sale price - cost basis. If you sellstock for $10,000 that originally cost you $9,000, you must pay tax on the $1,000difference.

What is included in cost basis?

The initial purchase price is the core of the cost basis for any capital asset or investment.That includes costs of acquisition, like attorney and advisor fees. Over time, factors likedepreciation of the asset or capital improvement can add or subtract from the cost basis ofcertain assets, like buildings. In the case of securities, reinvested dividends cause thecost basis for those securities to rise.

Is cost basis the same as cash basis?

Cash basis is an accounting method that records expenses or income when a payment is made orcash is received. It’s not as insightful as accrual accounting,which combines the current and expected future cash inflows and outflows. And cost basis isthe cost of an asset and is used to determine taxable gain/loss when it’s sold.

Cost Basis Defined: The Ultimate 101 Guide (2024)

FAQs

What is cost basis 101? ›

Cost basis is the original value of an asset for tax purposes—usually the purchase price, adjusted for stock splits, dividends, and return of capital distributions. This value is used to determine the capital gain, which is equal to the difference between the asset's cost basis and the current market value.

How do you figure out the cost basis? ›

You can calculate your cost basis per share in two ways: Take the original investment amount ($10,000) and divide it by the new number of shares you hold (2,000 shares) to arrive at the new per-share cost basis ($10,000/2,000 = $5).

How does IRS verify cost basis? ›

The IRS expects taxpayers to keep the original documentation for capital assets, such as real estate and investments. It uses these documents, along with third-party records, bank statements and published market data, to verify the cost basis of assets.

What happens if 1099-B does not show cost basis? ›

How can we help? The Form 1099-B that you receive might only report the sale date and sales proceeds. If it does not report the date acquired or cost basis, you still need to enter that information when you report your Form 1099-B in the TaxAct program so that it will transfer to Schedule D and/or Form 8949.

What is process costing 101? ›

The five steps in process costing are to analyze inventory, convert incomplete units to completed units equivalent, determine total expenses, calculate cost per unit of output, and allocate costs to completed and incomplete units.

What is the cost basis simplified? ›

The Bottom Line. Cost basis is the original value or purchase price of an asset or investment for tax purposes. It is used to calculate capital gains or losses, which is the difference between the selling and purchase prices of capital assets. Tracking cost basis is required for tax purposes.

What if I don't know my cost basis? ›

Go directly to the source

You can also call the company's shareholder services department for help. For shares purchased more than 10 years ago, go to a public library or law school library and look for back issues of newspapers, such as USA Today, to find the high and low price on the date of purchase.

What cannot be included in the cost basis of a main home? ›

The cost includes the cost of materials, equipment, and labor. However, you may not add the cost of your own labor to the property's basis. Add the interest you pay on construction loans during the construction period, but deduct interest you pay before and after construction as an operating expense.

What is the best cost basis method? ›

First-in, first-out method (FIFO)

This is the default for all investments other than mutual funds. Method implications: Because asset prices tend to rise over time, using FIFO as your cost basis method will have the oldest shares sold first, and those shares will often have the lowest cost basis.

What happens if cost basis is not reported to IRS? ›

If you do not report your cost basis to the IRS, the IRS considers your securities to have been sold at a 100% capital gain, which can result in a higher tax liability.

Does painting a house add to the cost basis? ›

Expenses to fix up a home for sale, such as a fresh coast of paint, cannot be deducted from the sales proceeds, nor can they be added to basis, says Gray. For rental properties, the cost basis rules are similar to those for residences.

Who is responsible for tracking cost basis? ›

Individual taxpayers are responsible for tracking the cost basis of their noncovered investments and for calculating and reporting the holding period and any realized gain or loss on the sale of those investments.

How do I calculate cost basis without records? ›

You can do that by going to the company's website, BigCharts, or Yahoo Finance to find historical high and low prices for that period. (They should be adjusted for any splits.) With that information, you can then estimate your capital gains. Average the two prices, then multiply the total by the number of shares sold.

What is the formula for cost basis? ›

The cost of shares, including reinvested dividends and capital gains distributions, divided by the number of shares held, is used to compute the average cost of each share. Shares are disposed of on a first in first out basis.

What if cost basis is incorrect? ›

If the cost basis information that is reported on your Form 1099-B is incorrect, you can report a correction to the IRS using Form 8949.

What happens if I don't know the cost basis of a stock? ›

If you can't determine exactly which shares you're selling, tax rules generally require you to calculate a gain or loss as if you're selling the earliest acquired shares (sometimes referred to as the "first in, first out" method).

Why is my cost basis higher than my purchase price? ›

Cost basis is the amount you paid for an investment, but it isn't always what you paid when you purchased it. Reinvesting dividends or capital gains will increase your cost basis.

What is included in the cost basis of a home? ›

Your cost basis typically includes: The original investment you made in the property minus the value of the land on which it sits.

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