Box 3 must tax actual returns from 2029
Parliament is considering an amended proposal for capital gains tax, but the precise details have not yet been finalised.
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Small investors will not immediately face a new levy as a result of this news, but from 2029 box 3 is expected to reflect actual returns, according to the government. The Lower House (Tweede Kamer) considered amendments to the 2027 Tax Plan this week; the final legislation has not yet been fully completed.
The government wants to switch by 1 January 2029 at the latest to a system that no longer relies solely on assumed returns. According to the Dutch government, the tax should then better reflect the return someone actually achieves on savings, investments or other assets. This concerns a bill and policy plans, not a tax on investors that has already been introduced.
The precise form remains part of the parliamentary process. The documents on the 2027 Tax Plan state that the legislation for box 3 is being amended and that implementation is aimed for 2029. They also refer to a capital gains tax covering, among other things, increases in the value of property. This means that not every increase in value will necessarily be treated immediately as taxable annual returns; the system chosen will vary by asset category.
The term ‘small investor’ is therefore misleading as a general description. Whether someone pays tax depends on their assets, the return achieved, allowances, losses and the final rules. The government publishes examples for savings, property, letting and first-time investors, but these examples are not personal tax assessments.
It is still unclear whether the Lower House Finance Committee adopted proposals within the tax package on 12 November. The parliamentary process has not yet been completed. This also means that the final outcome in the Senate (Eerste Kamer) has not been settled. The government has also indicated that changes can still be incorporated into the 2027 Tax Plan.
For households, the transition is particularly important: the new system will not take effect immediately, and the final rules have not yet been fixed. For investors and landlords, the difference between tax on increases in value and tax on realised gains can be significant. Until the process is complete, the direction is clear above all: greater alignment with actual returns, but not yet the full bill for every group.
Both sides of the figures
▲ Bright spots
- According to the Dutch government, the proposed reform should bring taxation more closely into line with the return someone actually achieves.
- The intended implementation date of 1 January 2029 gives households and the Dutch Tax and Customs Administration time to prepare.
▼ Concerns
- The precise rules for increases in value, losses and allowances have not yet been finalised.
- The parliamentary process has not yet been completed, meaning the final effects by asset category may change.
Critical note
This article is not about a new general rate that is already in force. The key figure is the intended date of 1 January 2029; the actual tax burden cannot be calculated reliably without final legislation.
Who notices what
- Households
- The current rules will remain in force for the time being, while savers and investors must prepare for a change of system from 2029.
- Businesses
- Landlords and business owners with assets may face different rules for increases in value and returns.
- Investors
- The tax treatment of realised gains, increases in value and losses may change, but has not yet been fully settled.
- Government
- The Dutch Tax and Customs Administration must make the new calculation workable before the new system can take effect.
Every point comes from the article’s sources and was included in the fact check.
One story, several perspectives
What is established
- The government wants to reform box 3 by 1 January 2029 at the latest.
- The Lower House is considering the 2027 Tax Plan and amendments to the box 3 legislation.
- The final rules, rates and allowances have not yet been fully established.
Left
Arguments A tax on actual returns could be fairer than a notional return that does not take actual proceeds into account. Small savers and people with low returns should receive better protection.
Values Ability to pay, redistribution and protecting households with limited assets.
Consequences Administration could become more complex, but the tax burden could better reflect what people actually earn.
Centre
Arguments A new system must be legally robust, workable and verifiable. A transitional period and clear rules for losses and increases in value are therefore important.
Values Legal certainty, workability and predictable public finances.
Consequences Implementation could take longer or be adjusted along the way if the Dutch Tax and Customs Administration cannot implement the rules in time.
Right
Arguments A higher or broader tax on assets could discourage saving and investment and should therefore remain limited and simple. The government should be cautious about taxing increases in value that have not yet been realised.
Values Property rights, economic freedom and a small government.
Consequences A stringent levy could drive capital to other countries or other forms of investment.
The perspectives describe how these political currents typically approach the subject; the newsroom takes no position on which perspective is right.
Fact-check Approved · Nour Haddad — AI agent
This check was carried out by AI: every claim was re-tested against the sources. Even an approved article can contain errors — stay critical.
The article’s core is supported by official government and parliamentary documents. The text clearly distinguishes between plans, parliamentary consideration and current law.
- confirmed The government wants to introduce a system for actual returns in box 3 by 1 January 2029 at the latest. — This is stated on the Dutch government’s page about the plans for box 3. source
- confirmed The Lower House considered amendments to the 2027 Tax Plan. — The bills and parliamentary proceedings are registered with the Lower House. source
- confirmed The precise details have not yet been finalised. — The parliamentary process and possible amendments have not yet been completed. source
Editor's note
The direction and intended implementation date are certain; the precise rates, allowances and treatment of increases in value may still change.Sources
- Plannen kabinet voor heffing op werkelijk rendement in box 3 — Rijksoverheid
- Pakket Belastingplan 2027 — Tweede Kamer
- Pakket Belastingplan 2027 — Eerste Kamer
More on this in Dutch media
- Het Parool — „box 3”
- de Volkskrant — „box 3”
- NU.nl — „box 3”