Strategie
Tax-Loss Harvesting in Czech Conditions: When It Makes Sense and When It Does Not
Key takeaways
- Tax-loss harvesting sells loss-making positions to offset taxable gains in the same year.
- In the Czech Republic there is a time test (3 years) and a value test (CZK 100,000 in proceeds) — both can make the classic US technique inapplicable.
- If you do not plan to sell, no taxable gain arises — harvesting therefore does not help.
- The technique makes sense when rebalancing or closing positions where a taxable gain actually arises.
- This article is not tax advice; consult a tax adviser.
Tax-loss harvesting is the technique of deliberately selling loss-making positions, whose loss offsets taxable gains from other sales in the same tax year — thereby reducing the tax bill.
How the technique works in the USA
In the US tax system, realised gains from the sale of equities are taxable regardless of the holding period (with a distinction between short-term and long-term capital gains tax). An investor therefore sells a loss-making position, recognises the loss, which reduces their taxable gain — and immediately buys a similar but not identical position to maintain market exposure. The system works because every sale is a taxable event.
Why it works differently in the Czech Republic
Czech tax rules are significantly more favourable for long-term investors — but this advantage also strips tax-loss harvesting of its purpose:
- Time test (3 years): if you hold an ETF or shares for more than 3 years, the proceeds from sale are exempt from income tax. Selling a loss-making position after 3 years has no tax effect — the gain is exempt anyway.
- Value test (CZK 100,000): if total proceeds from securities sales do not exceed CZK 100,000 per year, they are also exempt regardless of holding period. A small investor who sells less than CZK 100,000 does not need harvesting.
When tax-loss harvesting makes sense in the Czech Republic
The technique can be useful in specific scenarios:
- You are selling a position held for less than 3 years (you do not meet the time test) and have a gain on another short-term position. Realising a loss on a third position offsets this situation.
- Your annual sales proceeds exceed CZK 100,000 and you do not meet the time test.
- You actively trade and regularly realise gains — systematic record-keeping and offsetting then makes sense.
Practical advice for the passive investor
If you invest in global ETFs, regularly add more, and do not plan to sell before three years, tax-loss harvesting very likely does not apply to you at all. Either no gain ever arises (because you do not sell), or — after three years — it will be exempt. Energy spent on harvesting is better invested elsewhere: for example in disciplined DCA investing.
FAQ
What is tax-loss harvesting?
The deliberate sale of a loss-making investment in order to recognise a loss that reduces taxable gains from other sales in the same year. A popular technique in the USA, where every realised gain is taxable.
Why is tax-loss harvesting less useful in the Czech Republic?
Because of the time test (3 years) and the value test (CZK 100,000). If you hold investments for more than 3 years or sell less than CZK 100,000 per year, the income is exempt from tax. There is then nothing for harvesting to offset.
Who does the technique make sense for in the Czech Republic?
For investors who are selling positions held for less than 3 years at a gain, exceeding CZK 100,000 per year, or who actively trade. A long-term passive investor typically does not need it.
Is tax-loss harvesting legal?
Yes, it is a legal tax optimisation permitted by law. You must follow the rules — in particular avoid violating the wash sale principle (not formally codified in the Czech Republic, but immediately buying back an identical security after selling it is inefficient). Consult a tax adviser.