A Gelderland court signal shows why founders must keep loss claims alive while the assessment route can still be defended.
A small business owner can carry an old loss like a private memory. The unpaid hours, the website that never reached scale, the car used for meetings, the invoices that almost arrived, the agreement once made with the tax authority. In the ledger, those years can still feel alive. In Dutch income tax, memory has no value by itself.
The signal has to become readable
A Gelderland District Court decision of 5 June 2026, ECLI:NL:RBGEL:2026:4499, brings that point into focus. For founders, the lesson is plain. A bookkeeping loss becomes useful only when the activity qualifies as a source of income and the loss moves through the formal tax route.
The loss needs a tax address
The Dutch Box 1 system gives losses a fixed route. A loss from work and home can be set off against Box 1 income from the three preceding calendar years and the nine following calendar years. The Belastingdienst applies that order in sequence: first the earlier years, then the later ones. Box 1 losses stay out of Box 2 and Box 3.
That window matters, but it is not the first gate. Under the Wet inkomstenbelasting 2001, a loss must be fixed through a loss decision, the verliesbeschikking. Backward and forward set-off also follow formal decisions. A negative number in annual accounts, or in a submitted return, is weaker than that decision.
This is one of the quiet risks in a Dutch tax file. The business mind sees economic reality. Money went out. Work was done. The activity had a name and a purpose. The tax file looks at source, decision, date, and route. Only that route controls the assessment.
The source test comes first
Before loss set-off can help, the activity needs a source of income. The Belastingdienst uses three elements: participation in economic traffic, an intention to make profit, and a reasonable expectation of profit. The last point often breaks the case. A founder can keep hoping for profit after the market has stopped supporting that hope.
What the signal changes
Many honest files weaken here. A side activity keeps its name. The website stays online. Subscriptions continue. A car is financed. Professional identity survives, especially in creative, advisory, editorial, and knowledge work. Yet persistent negative results can move the activity outside the income-tax source test.
That distinction is not moral. It is practical. The work may have been serious, and the cash may have been spent. But when the source test fails, those costs may stop producing the tax result the founder expected.
Old settlements need later decisions
The case signal also touches a familiar founder instinct: leaning on an old settlement with the tax authority. A vaststellingsovereenkomst can matter. It can settle a specific dispute and bind both sides within its scope. The Belastingdienst also states that such an agreement may not conflict with law or policy.
That makes the settlement part of the file, not the whole file. It sits alongside later assessments, formal loss decisions, and the statutory loss window. A positive income-tax assessment can also carry an implicit nil-loss decision. Once that assessment becomes final, the loss position can harden with it.
For a founder, timing is governance. The six-week objection period is not decoration. Once it passes, the room to repair the position narrows. In some income-tax cases, the taxpayer may still ask for ambtshalve reduction within five years after the tax year. That is a backstop, not a substitute for timely objection.
Cash planning follows the formal file
Return to the founder at the table. If an old loss is expected to produce a refund, cash planning may already depend on it. A tax reserve may be lower. A price increase may be delayed. Another year of costs may feel bearable because the return is expected to soften the pain.
What founders should check
The ledger then tells two stories at once. One records spending. The other expects tax recoverability. If the formal loss decision is missing, if the activity fails the source test, or if the relevant years have closed, the second story can disappear.
Belastingrente can add weight. Under Dutch tax rules, interest generally runs from six months after the end of the tax year until the day before the assessment becomes collectible. The pressure is not only the denied deduction. It is also the time cost of a position that stayed open too long.
What changes tomorrow morning
The useful question is not whether the founder worked hard. Most did. The better question is whether the tax position still has three supports: a qualifying source of income, a formal loss decision, and a live procedural route. If one support is missing, the tax plan changes.
A disciplined small business file keeps final assessments, loss decisions, set-off decisions, objection dates, and settlement agreements together. It also keeps proof of market reality: customers, pricing, turnover development, pipeline, and the changes made to reach profit. These records show whether the activity still belongs in Box 1 as a business source.
That discipline also keeps income tax separate from VAT. A VAT refund follows its own rules and decisions. It should not be pulled into an income-tax loss dispute as if every tax claim shares one door.
Losses deserve respect, but they need current proof. A founder may carry the memory of hard years for life. Dutch income tax asks a sharper question: was the loss formally determined, did the activity still point to profit, and did the right decision get challenged in time?
Tomorrow's tax bill is paid with current evidence, not with old effort alone.
Sources
- Uitspraak ECLI:NL:RBGEL:2026:4499 – Semantius
- Wettenbank (Wet inkomstenbelasting 2001, art. 3.150) – Loss set-off window for Box 1 (IB)
- Belastingdienst – Order and mechanics of Box 1 loss set-off
- Rechtspraak – Implicit ‘loss-at-nil’ in a positive assessment
- Parket bij de Hoge Raad (PHR) – Loss set-off requires an actual loss decision (jurisprudential anchor)
- Belastingdienst – ‘Source of income’ threshold
- Belastingdienst – ‘Overig werk’ and persistent negatives
- Belastingdienst – Business expenses: deductibility depends on business purpose
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