What it means
Tax basis is simply what an asset counts as having cost for tax purposes, adjusted over time for things like improvements or depreciation. When basis carries over, the transfer itself does not reset that number, so the gain built up in the previous owner's hands is passed along rather than wiped out.
The recipient's eventual tax bill therefore depends on a purchase they were not part of. The clearest place this shows up is a gift.
Someone who gives shares or property during their lifetime hands over the asset and the embedded gain together, so the recipient can face a large tax bill on a sale even though they received the asset at a much higher value. This is the mirror image of what happens on death in many systems, where basis is stepped up to market value and the accumulated gain disappears for tax purposes.
Carryover basis also appears in business transactions. Contributing an asset to a partnership or to a controlled corporation in exchange for an ownership interest, or reorganising a group under a tax free rollover, typically leaves the asset's basis unchanged in the new entity's hands.
The same idea underpins like-kind exchanges, where basis carries into the replacement property so the deferred gain is preserved rather than forgiven. Two nuances are worth holding on to.
Gifts of assets that have fallen in value can attract a special rule that limits the loss a recipient may claim, and any gift tax attributable to the appreciation can sometimes be added to basis. Because the details differ by country and by transaction type, carryover basis is a concept to identify early and then confirm with a tax adviser.
In practice
Real-world examples.
Example
A founder gifts 5% of her company to her brother when the business is valued at $10,000,000. Her basis in that slice is $2,500, so on a later trade sale the brother is taxed on almost the whole of his proceeds rather than on the growth since the gift.
Example
Two engineers form a partnership and one contributes equipment bought for $60,000 that is now worth $95,000. The partnership records a carryover basis of $60,000, so the extra $35,000 of appreciation remains taxable when the equipment is eventually sold.
Example
An investor sells a rental property and rolls the proceeds into a replacement under a like-kind exchange. The old basis carries into the new building, so the depreciation schedule restarts from a lower figure than the purchase price would suggest.
Formula
Calculation
Recipient's basis = donor's adjusted basis, carried over unchanged. Gain on eventual sale = sale proceeds - carryover basis.
A parent bought shares years ago for $40,000 and gifts them to an adult child when the market value is $150,000. The child's carryover basis is $40,000, not $150,000. The child later sells the shares for $180,000, so the taxable gain = $180,000 - $40,000 = $140,000, and at a 20% capital gains rate the tax = $140,000 x 20% = $28,000. Had the same shares instead passed on death with a stepped-up basis of $150,000, the gain would be $180,000 - $150,000 = $30,000 and the tax $30,000 x 20% = $6,000, a difference of $28,000 - $6,000 = $22,000.Case study
Seen in the real world.
Meadowbrook Orchards is a fictional family farming business used here to illustrate the point. The founder wanted to hand the land to his daughter and, wanting to see the transfer completed in his lifetime, gifted it outright when it was valued at $2,400,000 against an original basis of $300,000.
Four years later the daughter sold a parcel for $900,000. Because basis carried over, only a proportionate share of the original $300,000 could be set against the sale, and the taxable gain was far larger than the growth in value since the gift. The illustrative shock was that the family had assumed the $2,400,000 valuation had become the new cost figure.
The fictional adviser's later comment was that the choice between gifting during life and transferring on death is partly a tax basis question. Meadowbrook's family kept the remaining land in the founder's estate, accepting a different set of trade-offs in exchange for a basis reset at the appropriate time.
Watch out
Common mistakes.
- Assuming the value used for gift or transfer purposes automatically becomes the recipient's cost for capital gains.
- Failing to obtain and keep the donor's original purchase records, which leaves the recipient unable to prove basis years later.
- Treating gifts and inheritances as equivalent, when one carries basis over and the other often resets it to market value.
Questions
People also ask.
Does carryover basis apply to inherited assets?
Generally not in systems that provide a step-up on death, where basis is reset to market value, although rules differ and some countries apply carryover in both cases.
What happens if the asset has fallen in value at the date of the gift?
Special rules usually apply, often limiting the loss the recipient can claim by measuring it from the lower market value at the gift date.
Does the donor pay tax when making the gift?
Usually no capital gains tax arises on the gift itself in a carryover basis system, which is precisely why the untaxed gain travels with the asset.
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