Hillbrook

What Hillbrook does

Hillbrook Expatriate Tax Solutions B.V. is a privately held, founder-led Dutch professional services firm headquartered in Amsterdam (with a second office in Rotterdam) that provides integrated tax, immigration, and payroll services to expatriates, internationally mobile employees, and the companies that employ them in the Netherlands. Founded in 2010 by Erik Heslenfeld and Henk Amorison — both formerly of Price Waterhouse and Arthur Andersen/Deloitte respectively — the firm sells a unified portfolio spanning 30% Ruling services (the Dutch tax facility making up to 30% of qualifying foreign-hire salary tax-free through end-2026), tax advisory, tax compliance (Dutch and US Federal/State), Dutch payroll administration for international workforces integrated with the Nmbrs platform, residence and work permit immigration services, and Foreign Local Hire advisory. Roughly 20 global mobility professionals, the majority recruited from Big 4 expatriate practices, deliver services on a fee-for-service basis to three named segments: individual expats, entrepreneurs establishing businesses in the Netherlands, and corporate clients (SMEs through large multinationals).

Name

Hillbrook

Legal name

Hillbrook Expatriate Tax Solutions

Website

https://hillbrook.nl

Company type

Private

Founded year

2010

Operating status

Operating

Headcount range

11–50 employees

Short description

Hillbrook is a founder-led Amsterdam-based professional services firm specializing in Dutch expatriate tax, immigration, and payroll services for individuals, entrepreneurs, and corporate clients employing internationally mobile workers.

Ownership category

akta.pro rank

Product category

Expatriate Tax & Immigration Services

NAICS

Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121), Offices of Certified Public Accountants (541211)

akta.pro primary industry

Tax, Payroll & Compensation Advisory for Relocation (HSAKAJAG)

akta.pro secondary industry

Employee Helpdesk / HR Service Center (Tier 1) (BPAAAIAH)

Keywords

• Expatriate tax services
• Immigration compliance services
• 30% ruling assistance
• International payroll services
• Global mobility consulting

Headquarters

HQ city

Amsterdam

HQ country

Netherlands

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Professional Services: Hillbrook generates revenue through provision of expatriate tax and immigration professional services including tax advisory, tax compliance, immigration services, payroll administration, and 30% ruling assistance. Services are provided to both individuals and corporate clients on a fee-for-service basis.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Hillbrook is a niche expat tax, immigration and global mobility services firm serving individuals, entrepreneurs and companies operating in the Netherlands. Its core offerings are 30% Ruling Services, Payroll Administration (integrated with Nmbrs), Tax Advisory, Tax Compliance, Immigration Services, US Tax Filing, and Foreign Local Hires Services, delivered as fee-for-service professional engagements. The firm is positioned as a one-stop, independent boutique alternative to Big 4 accountancy firms for Dutch expatriate tax and immigration compliance.

Product overview

Hillbrook is a niche expat tax and immigration services firm offering a unified portfolio of professional services for expatriates and internationally mobile employees. The core offering consists of 30% Ruling Services (a Dutch tax benefit for foreign hires), Tax Advisory, Tax Compliance, Payroll Services (integrated with Nmbrs), Immigration Services, US Tax Services, and Foreign Local Hires Services. These services are designed to work together, providing a one-stop approach for both tax and immigration compliance for individuals, entrepreneurs, and companies operating in the Netherlands.

Differentiator

Problem solved

Functional benefit

Products and services

• 30% Ruling Services Dutch 30% ruling tax benefit service for employees hired from abroad, allowing up to 30% of salary to be earned tax-free (effectively reducing the marginal tax rate from 49.5% to 34.65%) until 31 December 2026. Supports both individuals and employers through application and ongoing compliance.
• Payroll Services Dutch payroll administration for international workforce, integrated with the Nmbrs platform, ensuring tax and social security compliance for expat payroll policies and 30% ruling application at the payroll level.
• Tax Advisory Advisory services for individuals and companies covering Dutch tax matters, including start-up businesses, cross-border activities and divorce-related tax aspects, delivered by Tax Lawyers and senior consultants.
• Tax Compliance
• Immigration Services Assistance with Dutch visas, residence permits and work permits for hiring foreign nationals or sending employees on international assignments, integrated with Hillbrook's tax practice.
• US Tax Services US Federal and State tax return preparation for US persons (citizens, dual citizens and green card holders) living in the Netherlands, enabling compliance with both Dutch and US tax systems.
• Foreign Local Hires Services

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Partnerships

Six partnerships are on record, tiered minor, major and core.

• Crowe Foederer HR ServicesminorStrategic or Co-development Partner · 1 October 2019Crowe Foederer HR Services partners Bram Krijnen and Berry Croonen present at FEM events on pension and global mobility topics organized by Hillbrook.
• JoHo InsurancesminorStrategic or Co-development Partner · 11 December 2018JoHo Insurances advisor Justien Hendriks presents at FEM events organized by Hillbrook on topics including EU social security and health insurance for international mobile workers.
• DeloittemajorStrategic or Co-development Partner · 8 August 2018Hillbrook and Deloitte jointly process approximately 2,000 residence permit applications per year via IND online portal. Both firms serve companies and multinationals bringing employees to Netherlands. Joint advocacy for IND online services improvement.
• Booking.comcoreGTM or Marketing PartnerHillbrook and Booking.com partnership nominated for Best Vendor Partnership at EMMA Awards 2019. Nature of partnership involves Hillbrook providing expatriate tax and immigration services to Booking.com employees.
• NmbrscoreTechnology or IntegrationHillbrook partnered with Nmbrs to develop integrated international payroll solution. Together they created one of the best integrated international payroll solutions on the market for handling Dutch payroll administration for international workforce.
• Forum for Expatriate Management (FEM)coreStrategic or Co-development PartnerHillbrook appointed as Chapter Head for Dutch Chapter of Forum for Expatriate Management, an international online community uniting expatriate service providers and in-house global mobility professionals. Hillbrook organizes events enabling corporate members and suppliers to gather for presentations and networking.

Scale indicators2 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• TeekensKarsten (TEKZ): Dutch boutique tax advisory firm focused on SME and international entrepreneurs; Of Counsel Roy Vliese was previously a partner at TEKZ. Overlaps with Hillbrook's entrepreneur and SME tax segments.
• Fragomen: Global immigration-only law firm with strong Netherlands practice; Hillbrook was nominated against Fragomen-tier immigration providers at EMMA Awards. Direct peer for corporate immigration mandates.
• Vialto Partners: Global mobility, tax, and immigration advisory firm spun out from Deloitte in 2022; serves multinational clients with cross-border workforce needs. Highly comparable in service mix to Hillbrook but with global scale.
• EY Netherlands (People Advisory Services / Global Mobility): Big 4 firm offering expatriate tax, immigration, and global mobility services to corporate clients in the Netherlands. Direct competitor across Hillbrook's core service portfolio.
• PwC Netherlands (People & Organization / Global Mobility): Big 4 firm with a global mobility tax practice serving multinationals with expatriate employees in the Netherlands. Hillbrook's founders and many of its consultants are ex-PwC alumni, making service-line overlap near-total.
• Deloitte Netherlands (Expat Tax / Global Mobility): Big 4 firm with the largest expat tax and immigration practice in the Netherlands. Directly competes with Hillbrook on enterprise accounts and is also a co-processing partner for IND residence permits, making it the most comparable peer.
• BOXX (Belgium): Belgian expat tax and global mobility firm where Hillbrook partner Lyke Apontoweil previously worked. Closely comparable boutique model serving expats and internationally mobile employees in the Benelux region.
• KPMG Meijburg & Co: Dutch tax advisory firm (KPMG's Dutch member) specializing in international and expatriate tax; Of Counsel Roy Vliese was previously a partner at KPMG Meijburg. Direct peer for mid-market and enterprise Dutch expat tax mandates.

Broad incumbents

• Baker McKenzie (Amsterdam): Global law firm with a strong Amsterdam office offering immigration and tax services to multinationals. Competes with Hillbrook on enterprise immigration mandates as part of a much broader legal portfolio.

Emerging players

• Crowe Foederer (Netherlands): Dutch member of Crowe Global; partners with Hillbrook on FEM events for pension and global mobility topics. Adjacent competitor in payroll, HR services, and international tax for mid-market clients.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/hillbrook-expatriate-tax

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Hillbrook