The reform route is shifting, but today’s assessment still demands cash, records and restraint.
A provisional assessment lies beside a broker statement and the latest valuation of a second home. The figures belong to the same person, but they tell different stories. One reflects tax calculated through the current bridge system. Another shows what investments actually earned. The property may have produced rent, private use, value growth, costs and debt interest.
For a founder, this is private administration until the payment touches a dividend decision or reduces the household reserve behind the business. That is when Box 3 crosses the quiet boundary between personal tax and company governance.
The September tax package brought no Box 3 adjustment. The government had not reached a proposal with broad parliamentary support. The Minister of Finance did announce that the cabinet would work towards a definitive proposal for a capital-gains tax. That is a direction, not yet a working system.
Politics and assessments keep different clocks
The Tweede Kamer adopted the Wet werkelijk rendement box 3 on 12 February 2026. The official timetable identifies 1 January 2028 as the intended start date. The bill still requires treatment by the Eerste Kamer, while the wider design continues to develop.
Taxpayers therefore face three different realities. The bridge system operates today. An adopted bill based on actual return is moving through parliament. A newer political direction points towards taxing gains when assets are realised. Its details and timing have not been settled.
Those models create different pressures. Annual taxation of value growth can produce tax before an asset has been sold. Taxation at realisation delays that moment, but increases the importance of acquisition prices, disposals and transaction history. The practical warning is clear: do not build a business plan around one promised design too early.
The 2026 assessment is more immediate. For provisional assessments, the Belastingdienst uses a notional return of 1.28 per cent for bank deposits and 6.00 per cent for investments and other assets. The Box 3 rate is 36 per cent. The tax-free allowance is €59,357 for one person and €118,714 for fiscal partners under the bridge calculation.
The private balance sheet reaches the BV
Consider an owner-manager who planned to take a dividend next spring. Part of that dividend would rebuild a private reserve after paying a provisional assessment. Another part might repay a family loan or support a property renovation. A possible Box 3 reduction sits quietly inside those expectations.
That reduction is not yet cash. Under the counterproof regime, a taxpayer may report actual return when it produces a lower result than the notional calculation. The final outcome depends on the return, the assessment process and the records supporting the figures.
The distinction matters because private liquidity often carries more weight in a small company than formal charts suggest. An owner with a strong household reserve may leave more money inside the BV. Someone facing a larger private tax payment may prefer a dividend, delay an investment or become less willing to absorb a weak quarter.
None of those choices is automatically wrong. The governance weakness begins when an uncertain refund, an unfinished reform or an assumed concession enters the decision as though it were money already held at the bank.
Records are the stable part
The current actual-return route already asks more from private administration. Direct income and annual changes in the value of Box 3 assets and debts are relevant, including unrealised gains and losses. Positive and negative returns can interact within the same calendar year. A negative total is set at zero and cannot move into another year.
Costs are generally not deductible, apart from limited exceptions. From 2026, private use of a second home or another Box 3 property can also produce an own-use addition. The calendar of rental and private use is therefore part of the tax picture, not merely a detail for the family diary.
The useful tax-file question is simple: can I show, for every 2026 Box 3 asset and debt, the income, annual value change, interest, transactions and relevant property use behind the reported result?
A reliable answer may require bank statements, annual broker reports, valuation documents, loan agreements, interest records, rental income and dates of private use. Platform access is not a record strategy. Accounts close, advisers change and historic transaction data can become difficult to retrieve when it matters.
Cash only counts when it arrives
The scale of the counterproof programme also deserves sober attention. The Belastingdienst estimated that around 360,000 citizens could qualify for a refund for one or more years. Its 2026 annual plan allowed for up to 975 full-time-equivalent staff to handle the work. That indicates a substantial processing burden, not the timing of any individual payment.
A prudent household separates assessed tax, estimated exposure and possible future recovery. The same restraint should govern money moving between an owner and the company. A private payment funded by the BV still needs a clear legal and accounting basis, whether it is salary, dividend, repayment or another documented transaction.
The founder with the assessment, broker statement and property valuation does not need to predict the final architecture of Box 3 tonight. The useful task is smaller. Keep the private records complete. Keep possible relief outside available cash. Let business decisions rest on money that exists under rules that apply now.
Dutch Box 3 policy may move again. Good administration does not need to wait for it.
Before using expected Box 3 relief in a dividend or investment decision, review the underlying records and cash assumptions with an adviser.
The data, sourcing, and analysis behind this article were conducted by Linda Pavan Geraedts. AI was not used to identify sources, build the factual basis, or produce the analytical judgment contained here. AI was used only as a drafting aid. The final English text was personally reviewed, edited, and approved by Linda Pavan Geraedts before publication.
References
- Verzachtingen in box 3 sneuvelen op begroting
- Rijksoverheid - Status of the Wet werkelijk rendement box 3
- Rijksoverheid - September 2026 policy direction toward capital-gains taxation
- Belastingdienst - Current counterproof regime and actual-return evidence
- Belastingdienst - 2026 cash exposure under the bridge system
- Rijksoverheid - Current rates, exemption and green-investment transition
- Belastingdienst - Administrative capacity and duration of the recovery process
- Rijksoverheid - Closed route for many non-objectors for 2017 through 2020
