Group Payroll Specialist (part-time, 15 hours per week)

Job Title: Group Payroll Specialist (part-time, 15 hours per week)

Location: London – Hybrid

We are Strata!

Imagine being part of a fast and exciting brand experience agency whose clients include specialists in new technology, creators of some of the most stunning electric vehicles on the planet, financial institutions, and global leaders in pharmaceutical solutions. As an agency, we elevate these brands and make them heard through immersive and memorable virtual and face 2 face experiences.

As a people-first business, we encourage ambition, support and reward. We’re always listening and open to your ideas, just as we do with our clients.

Our name? It’s Strata, an agency on a mission to be the very best. This means we always want to hear from the very best creative and intelligent souls who genuinely believe that every moment matters.

Job Overview

We are looking for a detail-oriented and highly organised Group Payroll Specialist to manage end-to-end payroll operations across multiple entities within our fast-paced events agency. This role is critical to ensuring all payrolled staff are paid accurately and on time within a complex, high-volume, project-driven environment.

You will work closely with Finance, HR, and operational teams to support payroll compliance, improve processes, and provide a seamless payroll experience across the group.

Key Responsibilities

Payroll Management

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Process end-to-end payroll for multiple entities within the group (multiple monthly payrolls)

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Ensure accurate calculation of salaries, overtime, bonuses, commissions, and deductions are processed via internal software and/or an external agency.

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Maintain payroll data integrity and ensure timely submissions

Compliance & Reporting

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Ensure full compliance with HMRC regulations, legislation, and statutory requirements.

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Responsible for overseeing accurate calculations for PAYE, National Insurance, pensions, and other statutory deductions

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Liaise with external bureau to prepare and submit RTI filings and year-end reporting (P60s, P11Ds, etc.)

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Liaise with external auditors, pension providers, and tax authorities as required

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Produce all P11ds as required up to March 2027.

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Complete project to ensure all benefits are included in payroll in accordance with government deadlines (for the tax year from 5 April 2027 onwards)

Systems & Processes

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Maintain and optimise payroll systems and processes across the group

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Partner with HR to ensure accurate employee data flow (starters, leavers, changes)

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Identify and implement process improvements to enhance efficiency and accuracy

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Support payroll system upgrades, integrations, and project work

Stakeholder Management

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Act as the primary point of contact for all payroll-related queries

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Provide guidance to employees, managers, and HR teams

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Collaborate with Finance on reconciliations and reporting requirements

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Support international payroll coordination if applicable

Event Workforce Payroll

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Manage high-volume payroll cycles tied to projects and live events

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Process payments for casual and temporary staff under tight deadlines

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Ensure accurate tracking of hours worked, rates, and approvals