What it means
A capital loss is simply the shortfall between what you paid for an asset and what you received when you sold it. If you bought shares for $25,000 and sold them for $18,000, you have a $7,000 capital loss.
Until you sell, a fall in value is only an unrealised loss, and it normally has no tax effect. Tax rules usually let you use realised capital losses to offset capital gains.
This is helpful because it reduces the amount of gain that is taxed. Some systems also let a limited amount of any excess be set against other income.
Capital losses are different from operating losses. An operating loss comes from the everyday trading of a business, where costs exceed revenue.
A capital loss comes from disposing of an asset held for investment or long-term use, and the two often follow separate tax rules. Businesses meet capital losses when they close a division, sell equipment for less than its book value, or write off an investment.
Selling costs add to the loss, because they reduce the proceeds. Accountants also check whether a loss on a sale to a connected party qualifies, since many systems restrict those.
Some investors sell losing assets on purpose before a year end to cut their tax bill, a practice called tax loss harvesting. Rules known as wash sale or bed and breakfasting rules can block the benefit if the same asset is bought back too soon.
Always check the local rules before relying on this approach. Valuation is a further point where capital losses matter for reporting.
A company may write down an asset in its accounts before it sells it, which is an impairment, but the tax loss usually waits for the actual sale. The difference between the accounting loss and the tax loss is tracked as a timing difference.
In practice
Real-world examples
Example 1
A restaurant group sells a shuttered site for $400,000 that it bought for $550,000. The $150,000 shortfall is a capital loss, which it can set against gains from a separate property sale.
Example 2
A freelance designer sells shares in a technology fund for $14,000 after buying them for $20,000. She records a capital loss of $6,000 and keeps the contract note, because her accountant needs it to claim the offset.
Example 3
A distribution company sells a fleet of old trucks for less than their tax written-down value. The finance team calculates the loss for the tax return and flags that it may be treated as an ordinary deduction instead of a capital loss, depending on the local rules.
Think of it
Capital losses are losses from selling investments for less than you paid-the opposite of capital gains.
Formula
Calculation
Capital loss = Cost basis + Selling costs - Sale proceeds
Worked example: a company bought a minority stake in a supplier for $25,000. It later sold the stake for $18,000 and paid $500 in fees.
Step 1: Add the selling costs to the cost basis: $25,000 + $500 = $25,500.
Step 2: Subtract the sale proceeds: $25,500 - $18,000 = $7,500.
Capital loss = $25,000 + $500 - $18,000 = $7,500.
If the company also made a $10,000 gain on another asset in the same year, the net gain would be $10,000 - $7,500 = $2,500, and tax would apply only to that smaller figure.Case study
Seen in the real world
Orchard Lane Holdings is an illustrative, fictional investment company with two holdings. One was sold for a gain of $90,000, and the other, a start-up that struggled, was sold for a loss of $60,000. The finance director sold both in the same tax year on purpose.
By netting the two, the taxable gain for the year was $30,000 instead of $90,000. At an assumed tax rate of 20%, the tax bill was $6,000 rather than $18,000. The company saved $12,000.
The illustrative lesson is that the timing of disposals can matter as much as the price. Planning the sale of a loss-making asset in the same year as a gain can reduce the tax paid. She also noted in the board paper that the saving depended on the tax rules continuing to allow the offset, so the numbers would be rechecked if the rules changed.
Watch out
Common mistakes
- Treating a fall in market value as a loss for tax purposes before the asset is actually sold.
- Forgetting to include selling costs, which increase the size of the loss.
- Assuming every loss on an asset sale can be set against any type of income, when capital losses are often limited to gains.
Questions
People also ask
Can capital losses reduce my salary tax?
Usually only in a limited way, and many systems restrict capital losses to offsetting capital gains.
What if I have more losses than gains?
The unused amount can often be carried forward to later years, depending on local rules.
Is a write-off the same as a capital loss?
A write-off reduces the asset's book value in the accounts, while a capital loss for tax usually requires a disposal or a qualifying event.
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