London, UK - June 16, 2026; Certino, the specialist provider of expatriate payroll calculation infrastructure, has partnered with Topia, the global talent mobility platform, to address one of HR’s most persistent operational failures: paying internationally mobile employees accurately and compliantly.
Certino’s payroll-ready gross-up and shadow payroll calculations are now embedded directly within Topia Horizon, giving organizations a single, connected workflow for cross-border compensation and compliance across more than 90 countries, replacing the disconnected systems, multiple providers and spreadsheets that have long defined the space.
As international workforces grow, regulatory scrutiny intensifies and the pressure on HR, mobility, payroll and tax teams shows no sign of easing. Demand for international talent is rising, yet global compensation remains fragmented, error-prone and heavily manual, a liability that organisations can no longer afford to ignore. Topia Horizon's agentic AI automates risk assessments across tax, immigration, social security and permanent establishment before every trip and remote request. This partnership extends that intelligence directly into payroll execution.
David Walters, CEO, Topia, said, “International talent mobility has become a strategic priority but the operational processes underpinning it have not kept pace. Too many organisations are still managing critical payroll and tax calculations through manual processes that create unnecessary risk and cost. Topia Horizon’s intelligence closes that gap, surfaces risk, generates policy-linked cost simulations, and now connects directly to payroll-ready calculations through Certino. Partnering with Certino means organizations can run a more accurate, connected and scalable global compensation operation.”
By combining Topia Horizon with Certino’s payroll calculation infrastructure, the partnership enables organisations to reduce operational complexity, improve compliance confidence and eliminate the manual handoffs that create risk at month-end. Payroll instruction outputs are supported across more than 90 countries.
Tom Lockyer, CEO, Certino, added, “Gross-up calculations and shadow payroll obligations have always required significant manual effort and multiple handoffs. The consequences of getting them wrong are serious. Certino was built to standardise and automate these calculations, delivering consistent, payroll-ready outcomes at scale. Embedding that capability inside Topia Horizon brings specialist expatriate tax calculation directly into the operational workflow, enabling global mobility teams to execute with greater control, transparency and confidence.”
The integration is designed to serve both enterprise HR and mobility teams managing cross-border employees directly, and the mobility providers and managed service operators delivering global compensation programmes on behalf of clients, giving both a more operationally consistent approach to managing payroll obligations at scale.
The integrated capability is available to all organisations using Topia Horizon.
About Certino:
Certino is a specialist platform for global mobility tax calculation and shadow payroll, supporting multinational organisations alongside leading accountancy, payroll and relocation partners. The platform delivers consistent, payroll-ready expatriate tax calculations across multiple jurisdictions, helping organisations standardise complex equalisation and gross-up processes while improving cost predictability, reducing operational risk and enhancing the employee experience. By combining specialist tax expertise with scalable technology, Certino enables global mobility programmes to operate with greater control, transparency and confidence.
About Topia
Topia is the global leader in workforce mobility technology, helping organisations of all sizes manage every dimension of employee movement, compliantly, efficiently, and at scale. Topia's Horizon platform brings together agentic AI, policy intelligence, and end-to-end program management to give mobility teams the tools they've always deserved. Trusted by some of the world's most complex global organizations, Topia combines deep domain expertise in tax, immigration, and global HR with modern technology built for the way work actually happens today.
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