SOKA-BAU

What SOKA-BAU does

SOKA-BAU is the joint social fund institution of the German construction industry, operating as a dual-entity structure comprising Urlaubs- und Lohnausgleichskasse der Bauwirtschaft (ULAK, registered association) and Zusatzversorgungskasse des Baugewerbes AG (ZVK, stock corporation), both headquartered in Wiesbaden and jointly governed by the employer associations HDB and ZDB and the trade union IG BAU. It administers three mandated product pillars for the industry's commercial workforce: portable vacation cash equalization (Urlaub), branch pension provision (Tarifrente Bau, which replaced the legacy Rentenbeihilfe in 2016), and vocational training subsidies (Berufsbildung, in operation since 1974). Participation is mandatory for construction companies covered by the applicable collective agreements, producing a captive membership base of nearly 80,000 companies across Germany.

The underlying technology is a digital platform stack centered on the Kundenportal (employer and employee self-service portals), an electronic monthly-reporting system that integrates with an approved roster of construction payroll software providers (DATEV, NEVARIS, RIB, pds, Sage, SAP, BRZ, among others), and supporting services including the SIKOflex/SIKOplan working-time-account solutions and the bau-stellen.de job portal. The revenue model is contribution-based and regulated by collective agreement: employers pay percentage-of-gross-wages contributions into vacation, pension, vocational training, and winter-employment accounts, while individuals can additionally save through the voluntary BauRente ZukunftPlus and BasisPlus products. Bilateral agreements with Belgium, Denmark, France, Italy, Austria, and Switzerland extend coverage to international worker dispatches. ZVK is supervised by BaFin as a Pensionskasse.

Customer interaction occurs across multiple channels — the Kundenportal, free phone hotlines for employers and employees, webinars, on-site info events (SOKA-BAU vor Ort), social media, and a dedicated international portal — and the institution regularly surveys customers for service quality feedback. Sub-brands include Tarifrente Bau, BauRente, SIKOflex, SIKOplan, and bau-stellen.de, collectively positioning SOKA-BAU as the trusted industry-wide administrator of social security, retirement, and training-funding flows for German construction.

Name

SOKA-BAU

Legal name

Urlaubs- und Lohnausgleichskasse der Bauwirtschaft, rechtsfähiger Verein gemäß § 22 BGB (ULAK) - Zusatzversorgungskasse des Baugewerbes AG (ZVK)

Website

https://soka-bau.de

Company type

Private

Founded year

1957

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

SOKA-BAU is the jointly-operated social fund institution of the German construction industry, providing mandated vacation management, branch pension, vocational training funding, and voluntary supplementary retirement products to nearly 80,000 member companies and their commercial workers under collective-agreement-based contributions.

Ownership category

akta.pro rank

Product category

Construction Industry Social Benefits Administration

NAICS

Professional Employer Organizations (561330), Technical and Trade Schools (6115)

SIC

Accident & Health Insurance (6321)

akta.pro primary industry

Veterans, Military & Employer/Third-Party Billing Benefits (EDALAJAJ)

Keywords

• Construction industry benefits
• Branch pension administration
• Vacation fund management
• Vocational training subsidies
• Social fund services

Headquarters

HQ city

Wiesbaden

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Social Security Contributions from Employers: Construction companies pay monthly social security contributions based on a percentage of gross wages of commercial workers. These contributions fund vacation compensation, supplementary pensions, and vocational training.
2. BauRente Contributions: Voluntary supplementary pension contributions (BauRente ZukunftPlus for employees, BauRente BasisPlus for employers/business owners) that provide additional retirement benefits with state subsidies.
3. Winter Employment Levy Collection: SOKA-BAU collects the winter employment levy (1% of gross wages since 01/01/2026) on behalf of the Federal Employment Agency to finance seasonal short-time work benefits.

Pricing tiers

Go-to-market motion1 record

Distribution channels6 records

Marketing channels8 records

Core offering

SOKA-BAU is the joint social fund institution of the German construction industry that administers tariff-based vacation, pension, and vocational training benefits. It collects social security contributions from construction employers, manages portable vacation entitlements, provides the branch pension (Tarifrente Bau), funds apprenticeship training, and operates Germany's largest construction job portal (bau-stellen.de).

Product overview

SOKA-BAU is the social fund organization (Sozialkasse) for the German construction industry, operating as a dual-entity structure under the Urlaubs- und Lohnausgleichskasse der Bauwirtschaft (ULAK) and Zusatzversorgungskasse des Baugewerbes AG (ZVK). The company provides a portfolio of tariff-based services organized around three core pillars: Urlaub (vacation management with portable vacation accounts), Rente (branch pension covering Rentenbeihilfe and Tarifrente Bau), and Berufsbildung (vocational training subsidies). Additional offerings include the voluntary BauRente supplementary pension (ZukunftPlus for employees, BasisPlus for business owners), SIKOflex and SIKOplan working time account solutions, and the bau-stellen.de job exchange portal. Customers interact with SOKA-BAU through the Kundenportal employer and employee platforms, while data exchange with approved Baulohn-Programm (payroll) software partners enables automated monthly reporting.

Differentiator

Problem solved

Functional benefit

Brands

• Tarifrente Bau: The branch pension scheme for the construction industry that replaced the previous Rentenbeihilfe in 2016.
• BauRente
• SIKOflex
• SIKOplan
• Bau-Stellen.de

Products and services

• Urlaub (Vacation Management) Manages portable vacation accounts for commercial construction workers, enabling vacation rights to transfer between employers and allowing payout of unused vacation upon employment termination.
• Rente (Branch Pension - Tarifrente Bau) Provides automatic branch pension for all construction workers, with contributions collected via monthly employer reports and benefits portable across employers. Administered under the ZVK (Zusatzversorgungskasse des Baugewerbes AG) entity.
• Berufsbildung (Vocational Training) Supports vocational training in the construction industry by subsidizing apprenticeship compensation and covering costs of inter-company training centers, including course fees, travel, and accommodation. Reimbursement amounts can reach up to €51,208 per apprentice over a 3-year apprenticeship.
• BauRente (Voluntary Supplementary Pension)

Quantifiable outcome

• Up to €51,208 in total funding per apprentice over a 3-year apprenticeship (€25,123 reimbursement of apprenticeship remuneration plus €26,085 for over-the-company training)
• +2 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration31 records

Feature4 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• Austria - BUAK (Bauarbeiter-Urlaubs- und Abfertigungskasse)coreStrategic or Co-development Partner · 1 September 2005Framework agreement for mutual exemption from vacation contribution requirements for construction worker dispatches between Germany and Austria.
• Denmark - Ministry of EmploymentcoreStrategic or Co-development Partner · 14 May 2002Government agreement on mutual inclusion in vacation systems for companies dispatching workers between Germany and Denmark.
• Belgium - ONSS (Office National de Sécurité Sociale) and OPOCcoreStrategic or Co-development PartnerBilateral agreement for mutual exemption from vacation contribution requirements when German companies dispatch workers to Belgium and vice versa. Prevents double payments for construction companies working across borders.
• France - Congés Intempéries BTP Union des Caisses de FrancecoreStrategic or Co-development PartnerFramework agreement for mutual exemption from vacation procedures when German and French construction companies dispatch workers to each other's countries.
• Italy - CNCE (Commissione Nazionale Paritetica per le Casse Edili)coreStrategic or Co-development PartnerFramework agreement for mutual exemption from vacation contribution requirements for construction worker dispatches between Germany and Italy.
• HDB (Hauptverband der Deutschen Bauindustrie)coreStrategic or Co-development PartnerOne of two employer associations that jointly operate SOKA-BAU as the social fund institution of the German construction industry.
• ZDB (Zentralverband des Deutschen Baugewerbes)coreStrategic or Co-development PartnerOne of two employer associations that jointly operate SOKA-BAU as the social fund institution of the German construction industry.
• IG BAU (Industriegewerkschaft Bauen-Agrar-Umwelt)coreStrategic or Co-development PartnerTrade union representing construction workers, jointly operates SOKA-BAU as a joint institution of the German construction industry's social partners.
• Switzerland - Parifonds BauminorOthersSwiss fund for training and enforcement in construction; German companies dispatching to Switzerland may have contribution obligations to Parifonds Bau.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Sozialkasse des Berliner Baugewerbes (SKB): Berlin-based German construction industry social fund that handles vacation and training procedures for Berlin employers outside of SOKA-BAU's direct administration. Functions as a regional carve-out with identical mandate and product portfolio.
• Urlaubskasse des Bayerischen Baugewerbes: Bavaria's parallel social fund for the construction industry, handling vacation procedures for Bavarian employers. Closest direct peer to SOKA-BAU given identical scope and product structure, just geographically carved out.
• Malerkasse (ZVK des Maler- und Lackiererhandwerks): Social fund for the German painter and decorator trade, structurally analogous to SOKA-BAU but serving a different industry sector. Demonstrates how the German sectoral social fund model is replicated across multiple trades, providing a directly comparable operating template.

Regional players

• BUAK (Bauarbeiter-Urlaubs- und Abfertigungskasse): Austrian construction industry social fund with bilateral framework agreement with SOKA-BAU. Provides vacation pay, severance, and winter benefit administration for Austrian construction workers — directly comparable model and the most operationally aligned cross-border counterpart.
• CNCE (Commissione Nazionale Paritetica per le Casse Edili): Italian national body coordinating construction social funds (Casse Edili) across Italy. Has a framework agreement with SOKA-BAU for cross-border dispatches. Operates the same sectoral social fund model for the Italian construction industry.
• Congés Intempéries BTP: French construction industry social fund managing paid vacation, apprenticeship funding, and weather-related benefits for French construction workers. Direct bilateral partner of SOKA-BAU with comparable scope and product offering.
• Parifonds Bau: Swiss construction industry fund for training and enforcement, a bilateral partner of SOKA-BAU. Manages vocational training levies and labor compliance for the Swiss construction sector — smaller scale but same sectoral social fund archetype.
• ONSS (Office National de Sécurité Sociale): Belgian national social security office with bilateral agreement with SOKA-BAU for cross-border construction worker dispatches. While broader in scope than SOKA-BAU (covers all sectors), it is the operational counterpart for Belgian-German construction worker coordination.

Emerging players

• MetallRente Pensionskasse: German supplementary pension fund for the metalworking industry, jointly operated by employers and IG Metall. Comparable as a sectoral Pensionskasse with voluntary supplementary pension products (Riester, employer contributions), competing with SOKA-BAU's BauRente in the broader German market for occupational retirement provision.

Others

• Zentralwohlfahrtsstelle der Juden in Deutschland: Not a direct peer but illustrative of Germany's broader social fund ecosystem; included to highlight the structural pattern of jointly-governed German social institutions. SOKA-BAU's closest functional analogs are actually within the construction industry's parallel funds.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UClbMbnmmQa0SMXcSj5Vhiag
• Facebookfacebook.com/SOKA.BAU
• LinkedInlinkedin.com/company/18150450
• Instagraminstagram.com/sokabau
• Xx.com/SOKA_BAU

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 SOKA-BAU