What is WBSO (R&D Tax Credit)?
WBSO (Wet Bevordering Speur- en Ontwikkelingswerk) is a Dutch R&D tax incentive. It reduces wage costs for qualifying research and development work. The credit is 32% on the first EUR 350,000 of qualifying R&D wages (40% for starters in their first 5 years); 16% above EUR 350,000. Both BVs and self-employed ZZP individuals can apply.
Current Rate (Calendar year; apply quarterly to RVO before the project starts)
32% credit on first EUR 350,000 qualifying wages (40% for starters); 16% above EUR 350,000 (2025)
Example
A Dutch tech startup (starter status) has EUR 200,000 qualifying R&D wages in 2025. WBSO credit: 40% x EUR 200,000 = EUR 80,000, applied directly against the monthly loonheffing (wage tax) payment, effectively reducing payroll costs.
How WBSO (R&D Tax Credit) works in Netherlands
WBSO (Wet Bevordering Speur- en Ontwikkelingswerk) is a core pillar of the Dutch innovation incentive system. It provides direct wage cost relief for businesses conducting qualifying research and development, reducing the financial burden of maintaining an R&D function in the Netherlands.
**How WBSO works**
WBSO reduces the amount of loonheffing (payroll tax) an employer remits to the Belastingdienst each month. It is not a cash grant but a reduction in payroll tax obligations: 1. Apply to RVO (Netherlands Enterprise Agency) before the R&D project or period starts 2. RVO assesses the application and issues an S&O verklaring (R&D statement) confirming the credit amount 3. During the year, the employer withholds less loonheffing by the approved WBSO amount 4. At year-end, the actual R&D hours and wages are reconciled with the application
**Qualifying activities**
WBSO covers two main categories: - Technical-scientific research (TSO): research aimed at new scientific insights, typically in a university or research institution collaboration - Development of technically new products, production processes, or software (SO): the main category for tech companies, covering development of new functionality not available in the market
Support and maintenance, project management overhead, and commercialisation activities do not qualify. Only wages paid for actual R&D hours qualify.
**Rates (2025)**
- Starters (first S&O verklaring within first 5 calendar years of existence): 40% on first EUR 350,000 of qualifying wage costs - Other companies: 32% on first EUR 350,000 of qualifying wage costs - Both starters and others: 16% on qualifying wage costs above EUR 350,000
**ZZP self-employed**
Self-employed individuals (ZZP) can also apply for WBSO. Instead of a payroll tax credit, they receive a fixed WBSO aftrek (deduction) applied against their Box 1 income tax. The credit is EUR 13,454 per year (2025) for full-time R&D; higher for starters.
**Link to Innovation Box**
Having a WBSO declaration is the most practical route into the Innovation Box for companies without a formal patent. WBSO-covered IP development that results in profitable IP can then benefit from the 9% Innovation Box VPB rate on the commercialised profits. WBSO and the Innovation Box together can dramatically reduce the effective tax burden on innovation-driven businesses.
**Applying to RVO**
Applications are submitted via rvo.nl before each quarter. You describe the project, estimated R&D hours, and qualifying wage costs. RVO typically processes applications within 3 weeks. Retrospective applications are not accepted, which is why businesses must plan ahead.
Related terms
The Innovation Box is a Dutch VPB incentive that taxes profits derived from qualifying self-developed intellectual property at an effective rate of 9% rather than the standard 19% or 25.8% rates. To qualify, the IP must be partly developed in-house and typically supported by a WBSO R&D grant. The regime follows the OECD nexus approach.
Vennootschapsbelasting (VPB) is Dutch corporate income tax. The rate is 19% on the first EUR 200,000 of taxable profit and 25.8% above that threshold. BVs, NVs, and most other Dutch legal entities are subject to VPB. The annual return (aangifte vpb) is filed with the Belastingdienst within 5 months of the financial year-end.
A Besloten Vennootschap (BV) is a Dutch private limited company, the most common corporate structure for entrepreneurs, SMEs, and foreign investors setting up in the Netherlands. Since the 2012 Flex-BV law, minimum share capital is EUR 0.01. The BV is a separate legal entity; its shareholders have limited liability. Shares are not publicly tradeable.
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