Accounts Assistant

Colliers International; City of Westminster; On-site; GBP 28,000 - 38,000; Full time

Job summary

Colliers in London seeks an accounts payable/receivable assistant to support the Project Management service line. You will ensure timely processing of supplier invoices, align PO codes with project budgets, and assist with CIS and VAT compliance across multiple projects.

Key duties include supplier onboarding, handling invoice queries, and aiding month-end reconciliations. Strong Excel skills and attention to detail are essential in a fast-paced environment.

Qualifications

• Experience in accounts payable or finance administration.
• Proficiency in Microsoft Excel and finance systems.
• Strong attention to detail with the ability to manage high volumes and deadlines.
• Experience processing invoices, purchase orders and reconciliations.
• Desirable: experience in a project-based construction or professional services environment; CIS, VAT and multi-currency transactions; project financial trackers.

Responsibilities

• Process supplier invoices accurately and in a timely manner across multiple projects.
• Maintain alignment between supplier invoices, purchase orders and project trackers.
• Act as first point of contact for invoice queries with project managers, cost managers and suppliers.
• Support onboarding of new suppliers and ensure documentation and compliance.
• Assist CIS & VAT compliance, verify subcontractors and prepare monthly CIS returns.
• Support accruals, month-end close and reconciliations across projects.

Skills

Attention to detail

Deadline management

Organisational skills

Stakeholder management

Proactive problem solving

Communication

Tools

Excel

Finance systems

Job description

To provide dedicated accounts payable and accounts receivable support to the Project Management service line, with a primary focus on principal contracting delivery. The role will ensure timely and accurate processing of supplier invoices, maintain alignment between purchase orders, project budgets and financial trackers, and support compliance with internal financial controls and external regulatory requirements, including VAT and CIS., 1. Accounts Payable and Payment Processing - Process supplier invoices accurately and in a timely manner across multiple projects, validate them against approved purchase orders and contract terms, ensure correct coding to project budgets and cost centres, and support payment runs within agreed terms. 2. Principal Contracting Support - Maintain alignment between supplier invoices, purchase orders and project trackers, monitor contractor spend against approved budgets, and support finance and project teams with principal contracting workflows. Prepare finance related client approval documents, ensuring alignment with client requirements and guidelines. 3. Invoice Query Management - Act as a first point of contact for invoice queries, liaise with project managers, cost managers and suppliers to resolve discrepancies, and ensure timely resolution to avoid payment delays. 4. Supplier Onboarding & Compliance - support onboarding new suppliers, ensuring all required documentation is complete and assist in maintaining compliance with finance and audit requirements. 5. CIS & VAT Compliance - Support the administration of the Construction Industry Scheme (CIS), and VAT compliance by helping verify subcontractors, apply the correct CIS deductions, prepare monthly CIS returns, maintain accurate financial records, and ensure supplier invoices are treated correctly for VAT, including domestic reverse charge requirements. 6. Month-end and reconciliation - Assist with accruals, month-end close, supplier statement reconciliations and maintenance of accurate records of invoices, payments and outstanding liabilities, while supporting process standardisation across projects.

Essential

• Previous experience in accounts payable or finance administration
• Strong attention to detail, accuracy and ability to manage a high volume of deadlines
• Experience processing invoices, purchase orders and reconciliations
• Proficiency in Microsoft Excel and finance systems

Desirable

• Experience in a project-based, construction or professional services environment
• Exposure to principal contracting, CIS, VAT including domestic reverse charge, and multi-currency transactions
• Experience using project financial trackers

Key Competencies

• Strong organisational, communication and stakeholder management skills
• Proactive, solutions-oriented approach with the ability to work independently and as part of a team

Colliers is a leading commercial real estate services company, providing a full range of services to real estate occupiers, developers and investors on a local, national and international basis. Services include brokerage sales and leasing (landlord and tenant representation), real estate management, valuation, consulting, project management, project marketing and research. We provide our services across the core sectors (office, industrial, retail and hotel) as well as many specialised property types. The UK business is headquartered in London, with over 1300 specialists throughout 16 offices across the UK and Ireland.