At the adviser’s table, the founder is not talking about tax theory. She is trying to rebuild a private file while the BV still needs wages approved, invoices sent, and cash kept steady. The picture is familiar: a rental flat, a securities account, and an old private loan sit beside the business, even if the company itself is not the taxpayer.
From right to paperwork
The box 3 repair route reaches back to 2017 for eligible taxpayers. It follows the 2021 Kerstarrest and later Supreme Court rulings, including ECLI:NL:HR:2024:704 on 6 June 2024. The Wet tegenbewijsregeling box 3 entered into force on 19 July 2025. What started as legal redress now works like an execution file.
The Opgaaf Werkelijk Rendement, or OWR form, became available on 10 July 2025. By 8 December 2025, more than 476,000 forms had been submitted, and about 2.8 million letters had gone out about its use. Processing began in phases in autumn 2025, starting with the oldest years from 2017.
For 2021 and later, a taxpayer does not need to have objected to report actual return. That matters because the route is open, but it is not instant. Relief only becomes cash after the form, the review, and the assessment have moved far enough.
Why the private file still reaches the company
Box 3 is private income tax. Companies are not box 3 taxpayers. The file belongs to the natural person.
That neat separation often breaks down in small business life. The founder may fund the BV from private savings, lend money to the company, time dividends around private tax cash, or stand behind guarantees and current-account balances. A delay in the private file can change company decisions, even when the company itself has no box 3 position.
Back at the table, the business still has wages to approve and bills to pay. The private file needs WOZ material, rental income, debt interest, portfolio values, loan records, and proof of value movements. The digital form is only the front door. Behind it sit old statements, bank portals, broker reports, and missing papers.
Proof lives outside the form
The actual-return data sits with the taxpayer, not in the pre-filled tax return. A separate OWR form is needed for each tax year. For 2020 to 2024, it sits in Mijn Belastingdienst. For 2017 to 2019, it runs through a separate route on the Belastingdienst website.
No attachments can be sent with the form. That is a small detail with a large effect. The evidence still has to exist, year by year, even if it stays outside the submission. If the file goes to review, the taxpayer must still show how the figures were built.
The timing rules matter too. If an invited taxpayer sends no OWR form, the final assessment uses the fictitious return. Belastingdienst expects that assessment within 24 weeks, or 40 weeks when a tax consultant filed the return.
Calculation rules also narrow the room. Actual return is calculated over total box 3 assets and debts, without the heffingsvrij vermogen. A negative actual return in one year cannot be carried to another year. Costs are generally not deductible, except for limited items such as box 3 debt interest and certain WOZ-related investment adjustments.
The OWR selection module looks at every submitted form. It uses expert selection rules and is not self-learning. It can send a file straight through or toward staff review. For advisers and taxpayers, the message is plain: clean records may not buy speed, but gaps always create work.
The boundary years are not the same
The 2017 to 2020 years have the sharpest gate. On 25 June 2026, the Supreme Court ruled in ECLI:NL:HR:2026:907 on the Massaalbezwaarplus route for those years. Belastingdienst now states that people who did not object, objected late, or filed a late reduction request have no right to box 3 repair for 2017 to 2020. They also may not use the OWR form for those years.
For 2021 to 2024, the route remains broader. Taxpayers with box 3 income can report actual return for those years. From 2025, actual return can be reported in the income tax return itself. The old repair route, the current return, and the planned system now run side by side.
The government wants a system based on actual return from 1 January 2028. Rijksoverheid says the Tweede Kamer adopted the proposal on 12 February 2026. Later official material says the new system needs more data and brings heavier administration. That is no small change. About 3.9 million taxpayers have box 3 income, and about 1.4 million cannot have the return fully pre-filled because of assets such as real estate and non-listed shares.
Many founders sit in that group. They hold property, loans, investments, and mixed household-company cash flows. The private file is not a side note. It is part of how the business keeps moving.
Do not spend the refund early
The 2026 parameters add pressure. Official budget material sets the forfait for other assets at 7.78 percent for 2026 and lowers the heffingsvrij vermogen to €51,396. It also expects about 300,000 additional taxpayers to owe box 3 tax because of the lower threshold.
That is why more people will test the actual-return route. Advisers will have to sort by year, eligibility, asset type, proof quality, and likely cash effect. A quick form and a reconstruction job are not the same service.
For the founder, the practical discipline is simple. Keep one evidence trail per year. Separate settled tax cash from expected relief. Check the formal position for 2017 to 2020 before spending time on a route that is closed. Treat 2021 to 2024 as open, but still proof-heavy.
Box 3 repair is not only about getting money back. It asks whether the private balance sheet can explain itself when the tax system asks. For small business owners, that is the lasting lesson. Private records sit close to business judgment. They shape when cash is trusted, when dividends are sensible, and when relief is still only a number on paper.
Want a clear check of your file, timing risk, and cash planning before decisions are made?
The data, sourcing, and analysis behind this article were conducted by Linda Pavan. 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 before publication.
