Accounts Assistant (, , United Kingdom)

One Day Agency is an integrated advertising and marketing agency with offices in Manchester, London, and Warsaw. In just five years, we’ve built a team of 12 dynamic professionals working with brands of all sizes, from small e-commerce businesses to F1 teams.

We specialise in delivering high-impact advertising campaigns across OOH, TV, Radio, and digital channels, helping brands grow through strategic media planning and buying.

The Role

We’re looking for a highly organised and detail-oriented  Accounting & Finance Manager to support the financial operations of the business. This is a pivotal role working closely with our leadership and operations teams to manage day-to-day finance functions, including accounts payable, payroll, reconciliations, and management reporting.

You’ll need to be confident working independently, proactively managing month-end processes and reporting, with a solid understanding of core accounting principles. Experience in the media/advertising industry is highly desirable.

Key Responsibilities

• Manage accounts payable and receivable processes
• Reconcile management accounts, P&L, balance sheets, and cash flow
• Process payroll and manage pension contributions
• Handle accruals and prepayments accurately
• Issue client invoices and ensure timely follow-up on payments
• Maintain accurate financial records and documentation
• Prepare financial reports for internal stakeholders
• Assist with budgeting and forecasting
• Ensure compliance with internal financial controls and HMRC regulations
• Liaise with external accountants, suppliers, and internal teams

What We’re Looking For

• AAT Level 4 qualification (minimum requirement)
• Proven experience working with Xero and CRM systems
• Demonstrated competency in:

• Accruals and prepayments
• Reconciliation of management accounts
• P&L, balance sheet, and cash flow reporting
• Payroll processing
• Invoicing and payables

• Previous experience in a finance/accounts assistant role
• Strong Excel/Sheets and general IT skills
• Excellent attention to detail and organisational skills
• Comfortable working independently and prioritising tasks
• Media/advertising industry experience preferred

Salary & Benefits

Flexible Work: WFH every Friday + 20 additional WFH days per year

Annual Leave: Up to 30 days

Professional Growth: Unlimited training and development budget

Top-tier office setup with high-end equipment

Additional perks listed on our Careers page.