Billing Administrator

Investigo; Milton Keynes; On-site; GBP 28,000 - 34,000; Full time

Job summary

Investigo, based in Milton Keynes, is seeking a detail-oriented Billing Administrator to join a busy finance team. The role focuses on producing and validating invoices, reconciling data, and resolving billing discrepancies with strong Excel skills.

The ideal candidate will manage complex billing processes, work with multiple data sources, and ensure data integrity across systems while supporting month-end revenue activities. This is a full-time, on-site position in Milton Keynes.

Qualifications

• Experience in Billing Administrator or similar role.
• Proven ability to manage complex billing processes.
• Advanced Excel skills including VLOOKUP, XLOOKUP and Pivot Tables.
• Excellent attention to detail with data accuracy.

Responsibilities

• Produce accurate and timely invoices across a diverse customer base.
• Manage complex billing processes involving multiple data sources, pricing structures, and charge types.
• Review, reconcile, and validate large volumes of billing data prior to invoice generation.
• Investigate and resolve billing discrepancies, queries, and exceptions.
• Maintain billing records and ensure data integrity across finance systems.
• Work closely with operational and commercial teams to gather and verify billing information.
• Analyse billing trends and identify areas for process improvement.
• Support month-end activities relating to revenue and invoicing.
• Create and maintain Excel reports to assist with billing analysis and validation.
• Ensure all billing activities comply with internal controls and company procedures.

Skills

Billing knowledge

Excel advanced

Data analysis

Attention to detail

Tools

ERP systems

Job description

We are seeking a detail-oriented Billing Administrator to join a busy finance team within a growing business, based in Milton Keynes. This role is ideal for someone with strong billing experience who is comfortable working with complex datasets, managing high volumes of information, and ensuring absolute accuracy across customer invoicing processes.

You will play a key role in producing and validating invoices, analysing multiple data streams, and resolving billing discrepancies. This position requires excellent Excel skills, strong attention to detail, and previous experience handling complex billing arrangements.

Key Responsibilities

• Produce accurate and timely invoices across a diverse customer base.
• Manage complex billing processes involving multiple data sources, pricing structures, and charge types.
• Review, reconcile, and validate large volumes of billing data prior to invoice generation.
• Investigate and resolve billing discrepancies, queries, and exceptions.
• Maintain billing records and ensure data integrity across finance systems.
• Work closely with operational and commercial teams to gather and verify billing information.
• Analyse billing trends and identify areas for process improvement.
• Support month-end activities relating to revenue and invoicing.
• Create and maintain Excel reports to assist with billing analysis and validation.
• Ensure all billing activities comply with internal controls and company procedures.

Requirements

• Previous experience in a Billing Administrator, Billing Coordinator, Revenue Administrator, Sales Ledger or similar billing-focused role.
• Proven experience managing complex billing processes rather than high-volume standard invoicing.
• Advanced or strong intermediate Excel skills including VLOOKUP/XLOOKUP, Pivot Tables, data analysis, and reconciliation work.
• Excellent attention to detail with the ability to identify anomalies across multiple lines of data.
• Strong analytical and problem-solving skills.
• Ability to work accurately under pressure and meet deadlines.
• Confident communicating with both finance and non-finance stakeholders.
• Experience using ERP or finance systems would be advantageous.

What We're Looking For

• Someone who thrives when working with complex billing data.
• A highly organised individual with a meticulous eye for detail.
• A strong Excel user who enjoys analysing data and resolving discrepancies.
• A proactive team player who can improve processes and challenge inaccuracies.
• A candidate who takes ownership of billing accuracy and customer outcomes.

This is an excellent opportunity for an experienced Billing Administrator looking to join a fast-paced business where accuracy, data analysis, and attention to detail are highly valued.