The uniform capitalization rules specify the costs you add to basis in certain circumstances.

Intangible assets include goodwill, patents, copyrights, trademarks, trade names, and franchises. The basis of an intangible asset is usually the cost to buy or create it. If you acquire multiple assets, for example a going business for a lump sum, see Allocating the Basis, later, to figure the basis of the individual assets. The basis of certain intangibles can be amortized. See chapter 9 of Publication 535 for information on the amortization of these costs.

If you buy multiple assets for a lump sum, you and the seller may agree to a specific allocation of the purchase price among the assets in the sales contract. If this allocation is based on the value of each asset and you and the seller have adverse tax interests, the allocation generally will be accepted. However, see Trade or Business Acquired, next.

If you acquire a trade or business, allocate the consideration paid to the various assets acquired. Generally, reduce the consideration paid by any cash and general deposit accounts (including checking and savings accounts) received. Allocate the remaining consideration to the other business assets received in proportion to (but not more than) their fair market value in the following order.

If you buy buildings and the land on which they stand for a lump sum, allocate the basis of the property among the land and the buildings so you can figure the depreciation allowable on the buildings.

Figure the basis of each asset by multiplying the lump sum by a fraction. The numerator is the FMV of that asset and the denominator is the FMV of the whole property at the time of purchase. If you are not certain of the FMV of the land and buildings, you can allocate the basis based on their assessed values for real estate tax purposes.

Increase the basis of property by assessments for items such as paving roads and building ditches that increase the value of the property assessed. Do not deduct them as taxes. However, you can deduct as taxes charges for maintenance, repairs, or interest charges related to the improvements.

Do not add to your basis costs you can deduct as current expenses. For example, amounts paid for incidental repairs or maintenance that are deductible as business expenses cannot be added to basis. However, you can choose either to deduct or to capitalize certain other costs. If you capitalize these costs, include them in your basis. If you deduct them, do not include them in your basis. (See Uniform Capitalization Rules, earlier.)

The costs you can choose to deduct or to capitalize include the following.

For more information about deducting or capitalizing costs, see chapter 8 in Publication 535.

If you have a casualty or theft loss, decrease the basis in your property by any insurance or other reimbursement and by any deductible loss not covered by insurance.

You must increase your basis in the property by the amount you spend on repairs that substantially prolong the life of the property, increase its value, or adapt it to a different use. To make this determination, compare the repaired property to the property before the casualty. For more information on casualty and theft losses, see Publication 547, Casualties, Disasters, and Thefts.

The amount you receive for granting an easement is generally considered to be a sale of an interest in real property. It reduces the basis of the affected part of the property. If the amount received is more than the basis of the part of the property affected by the easement, reduce your basis in that part to zero and treat the excess as a recognized gain.

If you claim the credit for a qualified electric vehicle, you must reduce your basis in that vehicle by the maximum credit allowable even if the credit allowed is less than that maximum amount. For information on this credit, see chapter 12 in Publication 535.

Decrease the basis in your car by the gas-guzzler (fuel economy) tax if you begin using the car within 1 year of the date of its first sale for ultimate use. This rule also applies to someone who later buys the car and begins using it not more than 1 year after the original sale for ultimate use. If the car is imported, the one-year period begins on the date of entry or withdrawal of the car from the warehouse if that date is later than the date of the first sale for ultimate use.

If you take the section 179 deduction for all or part of the cost of qualifying business property, decrease the basis of the property by the deduction. For more information about the section 179 deduction, see Publication 946.

If you take the deduction for clean-fuel vehicles or clean-fuel vehicle refueling property, decrease the basis of the property by the amount of the deduction. For more information about these deductions, see chapter 12 in Publication 535.

You can exclude from gross income any subsidy you received from a public utility company for the purchase or installation of any energy conservation measure for a dwelling unit. Reduce the basis of the property for which you received the subsidy by the excluded amount. For more information on this subsidy, see Publication 525.

Decrease the basis of property by the depreciation you deducted, or could have deducted, on your tax returns under the method of depreciation you chose. If you took less depreciation than you could have under the method chosen, decrease the basis by the amount you could have taken under that method. If you did not take a depreciation deduction, reduce the basis by the full amount of the depreciation you could have taken.

Unless a timely election is made not to deduct the special depreciation allowance for property placed in service after September 10, 2001, decrease the property's basis by the special depreciation allowance you deducted or could have deducted.

If you deducted more depreciation than you should have, decrease your basis by the amount equal to the depreciation you should have deducted plus the part of the excess depreciation you deducted that actually reduced your tax liability for the year.

In decreasing your basis for depreciation, take into account the amount deducted on your tax returns as depreciation and any depreciation capitalized under the uniform capitalization rules.

For information on figuring depreciation, see Publication 946.

If you are claiming depreciation on a business vehicle, see Publication 463. If the car is not used more than 50% for business during the tax year, you may have to recapture excess depreciation. Include the excess depreciation in your gross income and add it to your basis in the property. For information on the computation of excess depreciation, see chapter 4 in Publication 463.

If a debt you owe is canceled or forgiven, other than as a gift or bequest, you generally must include the canceled amount in your gross income for tax purposes. A debt includes any indebtedness for which you are liable or which attaches to property you hold.

You can exclude canceled debt from income in the following situations.

If you exclude from income canceled debt under situation (1) or (2), you may have to reduce the basis of your depreciable and nondepreciable property. However, in situation (3), you must reduce the basis of your depreciable property by the excluded amount.

For more information about canceled debt in a bankruptcy case or during insolvency, see Publication 908, Bankruptcy Tax Guide. For more information about canceled debt that is qualified farm debt, see chapter 4 in Publication 225. For more information about qualified real property business debt, see chapter 5 in Publication 334, Tax Guide for Small Business.

If you postponed gain from the sale of your main home before May 7, 1997, you must reduce the basis of your new home by the postponed gain. For more information on the rules for the sale of a home, see Publication 523.

If you claim an adoption credit for the cost of improvements you added to the basis of your home, decrease the basis of your home by the credit allowed. This also applies to amounts you received under an employer's adoption assistance program and excluded from income. For more information on these benefits, see Publication 968, Tax Benefits for Adoption.

If you are an employer, you can claim the employer-provided child care credit on amounts you paid or incurred to acquire, construct, rehabilitate, or expand property used as part of your qualified child care facility. You must reduce your basis in that property by the credit claimed.

A bargain purchase is a purchase of an item for less than its FMV. If, as compensation for services, you purchase goods or other property at less than FMV, include the difference between the purchase price and the property's FMV in your income. Your basis in the property is its FMV (your purchase price plus the amount you include in income).

If the difference between your purchase price and the FMV represents a qualified employee discount, do not include the difference in income. However, your basis in the property is still its FMV. See Employee Discounts in Publication 15–B, Employer's Tax Guide to Fringe Benefits.

If you receive property for your services and the property is subject to certain restrictions, your basis in the property is its FMV when it becomes substantially vested unless you make the election discussed later. Property becomes substantially vested when your rights in the property or the rights of any person to whom you transfer the property are not subject to a substantial risk of forfeiture.

There is substantial risk of forfeiture when the rights to full enjoyment of the property depend on the future performance of substantial services by any person.

When the property becomes substantially vested, include the FMV, less any amount you paid for the property, in income.

If you receive property as a result of an involuntary conversion, such as a casualty, theft, or condemnation, you can figure the basis of the replacement property you receive using the basis of the converted property.

The exchange of property for the same kind of property is the most common type of nontaxable exchange.

To qualify as a like-kind exchange, you must hold for business or investment purposes both the property you transfer and the property you receive. There must also be an exchange of like-kind property. For more information, see Like-Kind Exchanges in Publication 544.

The basis of the property you receive is the same as the basis of the property you gave up.

A partially nontaxable exchange is an exchange in which you receive unlike property or money in addition to like property. The basis of the property you receive is the same as the basis of the property you gave up, with the following adjustments.

If the other party to the exchange assumes your liabilities, treat the debt assumption as money you received in the exchange.

If you sell property and buy similar property in two mutually dependent transactions, you may have to treat the sale and purchase as a single nontaxable exchange.

If you have property used partly for business and partly for personal use, and you exchange it in a nontaxable exchange for property to be used wholly or partly in your business, the basis of the property you receive is figured as if you had exchanged two properties. The first is an exchange of like-kind property. The second is personal-use property on which gain is recognized and loss is not recognized.

First, figure your adjusted basis in the property as if you transferred two separate properties. Figure the adjusted basis of each part of the property by taking into account any adjustments to basis. Deduct the depreciation you took or could have taken from the adjusted basis of the business part. Then figure the amount realized for your property and allocate it to the business and nonbusiness parts of the property.

The business part of the property is permitted to be exchanged tax free. However, you must recognize any gain from the exchange of the nonbusiness part. You are deemed to have received, in exchange for the nonbusiness part, an amount equal to its FMV on the date of the exchange. The basis of the property you acquired is the total basis of the property transferred (adjusted to the date of the exchange), increased by any gain recognized on the nonbusiness part.

If the nonbusiness part of the property transferred is your main home, you may qualify to exclude from income all or part of the gain on that part. For more information, see Publication 523.

If the FMV of the property at the time of the gift is less than the donor's adjusted basis, your basis depends on whether you have a gain or a loss when you dispose of the property. Your basis for figuring gain is the same as the donor's adjusted basis plus or minus any required adjustment to basis while you held the property. Your basis for figuring loss is its FMV when you received the gift plus or minus any required adjustment to basis while you held the property (see Adjusted Basis, earlier).

If you use the donor's adjusted basis for figuring a gain and get a loss, and then use the FMV for figuring a loss and have a gain, you have neither gain nor loss on the sale or disposition of the property.

If the FMV of the property is equal to or greater than the donor's adjusted basis, your basis is the donor's adjusted basis at the time you received the gift. Increase your basis by all or part of any gift tax paid, depending on the date of the gift.

Also, for figuring gain or loss from a sale or other disposition of the property, or for figuring depreciation, depletion, or amortization deductions on business property, you must increase or decrease your basis by any required adjustments to basis while you held the property. See Adjusted Basis, earlier.

In community property states (Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin), husband and wife are each usually considered to own half the community property. When either spouse dies, the total value of the community property, even the part belonging to the surviving spouse, generally becomes the basis of the entire property. For this rule to apply, at least half the value of the community property interest must be includable in the decedent's gross estate, whether or not the estate must file a return.

For example, you and your spouse owned community property that had a basis of $80,000. When your spouse died, half the FMV of the community interest was includible in your spouse's estate. The FMV of the community interest was $100,000. The basis of your half of the property after the death of your spouse is $50,000 (half of the $100,000 FMV). The basis of the other half to your spouse's heirs is also $50,000.

For more information on community property, see Publication 555, Community Property.

The following example explains the rule for the basis of property held by a surviving tenant in joint tenancy or tenancy by the entirety.

Include one-half of the value of a qualified joint interest in the decedent's gross estate. It does not matter how much each spouse contributed to the purchase price. Also, it does not matter which spouse dies first.

A qualified joint interest is any interest in property held by husband and wife as either of the following.

Under certain conditions, when a person dies the executor or personal representative of that person's estate can choose to value the qualified real property on other than its FMV. If so, the executor or personal representative values the qualified real property based on its use as a farm or its use in a closely held business. If the executor or personal representative chooses this method of valuation for estate tax purposes, that value is the basis of the property for the heirs. Qualified heirs should be able to get the necessary value from the executor or personal representative of the estate.