Careers at One Day.

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 Accounts Assistant 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

💰 Salary: Up to £30,000

🏡 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.