What it means
A capital loss happens when you sell an asset below its purchase cost. Tax systems that separate gains by holding period do the same with losses, so a loss on an asset held for a brief time is a short-term loss.
The category matters because of how it is netted against gains. In the United States, short-term losses are first set against short-term gains, and long-term losses against long-term gains.
If one category ends up with a net loss, it is then used against the net gain of the other category. The aim is to reach a single net figure for the year.
If the year ends with a net loss overall, individuals can usually deduct a limited amount against other income and carry forward the rest to later years. The size of the limit and the carry-forward rules are set by the tax authority and can change.
Companies often face different rules, so the treatment depends on the type of entity. Investors sometimes sell losing positions deliberately to create a loss that offsets gains elsewhere, a practice called tax-loss harvesting.
Rules known as wash sale rules stop investors from selling a loss-making asset and buying it straight back to claim the loss. These rules disallow the loss if the same or a very similar asset is repurchased within a short window around the sale.
From a planning point of view, a short-term loss is not good news, but it is not wasted either. It is a tax asset that can reduce future bills if the rules allow it to be used.
Good record keeping of dates and costs is what makes the claim possible.
In practice
Real-world examples.
Example
A teacher buys shares in a tech company for $4,000 and sells them six months later for $2,800 after bad news. The $1,200 short-term loss is set against a short-term gain she made on another sale. Her tax bill falls by an amount that partly softens the blow.
Example
A fund manager reviews the portfolio in December and sells three holdings that are showing losses of $18,000 in total. He uses the losses to offset gains realised earlier in the year. He waits more than a month before buying anything similar so the loss is not disallowed.
Example
A small company sells a piece of equipment it held for ten months at a loss. The accountant checks whether the loss is treated as a capital loss or an ordinary business loss in the local tax rules. The distinction decides how and when it can be used.
Formula
Calculation
Short-term loss = purchase cost (including fees) - sale proceeds (after fees), for an asset held for the short-term period or less
Net short-term result = short-term gains - short-term losses
Suppose an investor sells shares bought for $9,000 eight months ago for $6,500, giving a short-term loss of 9,000 - 6,500 = $2,500. In the same year she has short-term gains of $10,000 on other sales, so the net short-term result is 10,000 - 2,500 = $7,500. At an assumed 30% tax rate, the tax saving from the loss is 2,500 x 0.30 = $750.Case study
Seen in the real world.
Hartwell Family Office is an illustrative, fictional firm managing money for a single family. In October its adviser saw that the family had realised $60,000 of short-term gains from quick trades in the year.
He reviewed the unrealised positions and found two shares, held for less than a year, with combined paper losses of $22,000. By selling them before the year end, the family converted the paper losses to realised short-term losses and cut the net short-term gain to $38,000.
At an assumed 30% rate the saving was $6,600, but the adviser also warned the family that they would lose the chance to recover if the shares rebounded. The illustrative lesson is that harvesting a loss is a trade-off between a certain tax saving and the uncertain future value of the asset.
Watch out
Common mistakes.
- Selling a loser and buying it back immediately, which can trigger wash sale rules and cancel the tax benefit.
- Forgetting to record the dates, so a loss is placed in the wrong category and offset in the wrong order.
- Selling a good investment only to create a tax loss, when the future return could be worth more than the tax saved.
Questions
People also ask.
Can a short-term loss be carried forward?
In many systems, yes, any net loss that cannot be used this year can be carried to future years, although the limits vary by country.
Does a short-term loss reduce my salary tax?
Only up to a limited amount if you have a net capital loss overall, which depends on the local tax rules.
Is a paper loss the same as a short-term loss?
No, a paper loss is on an asset you still own, and it only becomes a short-term loss when you sell.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%