An IT consulting firm with 80 billable consultants and a 12% bench rate has roughly 10 people sitting idle every month. At an average fully loaded cost of £65,000 per year per consultant, that’s over £650,000 in payroll not covered by revenue. Yet the vast majority of these businesses still manage this reality with a spreadsheet for scheduling, a separate invoicing tool, and a payroll system that talks to neither.
The global IT services and consulting market employs tens of millions of people across hundreds of thousands of firms (IDC Worldwide IT Services Forecast). Within this landscape, IT staffing and consulting firms are the segment most sensitive to poor operational management: their product is their consultants’ time. When that time goes unbilled, it still costs money.
This guide explains why generic ERPs fall short for IT consulting firms, how to choose between a dedicated PSA (Professional Services Automation) platform and a sector-specific ERP, and which solution fits your firm’s size.
Why an IT Consulting Firm Is Not a Standard Business
The unplaced consultant: an immediate, unrecoverable loss
In a manufacturing plant, a line shutdown costs money but the inventory still exists. In an IT consulting firm, a consultant on the bench costs money and produces nothing. It is a net, immediate, non-recoverable loss.
Bench time refers to the period when a consultant is between engagements: internal training, pre-sales support, unplanned availability. The duration depends on market conditions, the consultant’s profile, and the efficiency of the internal staffing process. Most IT consulting firm directors target a utilisation rate above 85% to maintain economic equilibrium. Below that threshold, operating margins deteriorate rapidly.
A generic ERP has no concept of “utilisation rate.” It manages orders, stock, and delivery notes. It has no module to project the availability of 50 consultants over the next 60 days and alert the sales team when a senior architect becomes free in three weeks.
The economic equation specific to IT consulting
An IT consulting firm generates revenue through three main models, often mixed across the same client portfolio:
- Time and materials (T&M): billing at actual time spent, based on a contracted daily or hourly rate. The invoice is typically issued monthly on production of a signed timesheet.
- Fixed price: a set fee for a defined scope. Billing may occur at final delivery, at milestones, or as a percentage of completion according to contract terms.
- Capped T&M (or soft fixed price): a hybrid where billed time is capped but overruns can be recharged under specific conditions.
This diversity of billing models is the first hurdle an IT consulting firm hits with a standard ERP. An off-the-shelf system knows how to generate an invoice against a sales order. It does not know how to automatically calculate the billable amount for a T&M engagement from validated timesheets, or trigger a milestone invoice when a deliverable is accepted in the project module.
Payment terms: a cash flow constraint to manage proactively
Payment terms in IT services typically run 30 to 60 days from the invoice date, depending on jurisdiction and client contract. Public sector clients often have statutory payment deadlines (30 days in many EU countries and the UK), while large enterprise clients may push for 60 or 90 days.
DSO (Days Sales Outstanding) — the average time to collect invoices — is a critical metric for IT consulting firm cash flow. A DSO of 55 days across 100 consultants billed monthly on T&M represents a significant working capital lock-up. The best ERP/PSA platforms for IT consulting firms integrate automated reminders and DSO dashboards to anticipate cash pressure before it hits.
The 6 Core Processes an IT Consulting Firm Must Centralise
1. Staffing and resource planning
Assigning the right consultant to the right engagement at the right time. This requires real-time visibility into availability by profile, certified skills, geographic mobility, and current contractual commitments. A 90-day planning view is the minimum to anticipate engagement endings and launch replacement processes before a consultant hits the bench.
2. Time tracking and management validation
Timesheet entry is the raw material of T&M billing. It must be daily or weekly, granular (engagement, phase, activity), validated by the engagement manager, and exportable automatically into billing. Any friction in this process — no offline entry, poor mobile interface — translates into billing delays and a deteriorating DSO.
3. Complex multi-model billing
Automatically generating a T&M invoice from validated timesheets, triggering a milestone invoice on deliverable acceptance, handling advance payments on fixed-price projects and credit notes in case of disputes. Billing in an IT consulting firm is not a simple accounting operation: it is a business process that must articulate with project management and contractual commitments.
4. Bench time management
Tracking bench periods by consultant, calculating global and branch utilisation rates, anticipating engagement endings and triggering sales alerts. The objective is not just to measure bench time but to reduce it actively: an alert saying “Consultant X becomes available in 15 days” sent to the sales team three weeks before the engagement ends can mean the difference between two days on the bench and three weeks.
5. Skills management and competency repository
Maintaining an up-to-date repository of each consultant’s skills, certifications, and experience is essential for effective staffing. This repository must be queryable quickly: “Who is available, AWS certified, with retail sector experience, based in London?” is a routine question in any staffing or delivery management team.
6. P&L per engagement and margin per consultant
Calculating the economic contribution of each engagement (billed revenue minus fully loaded consultant cost for the period) in real time, not in retrospect at the quarterly close. A management tool that displays the running margin of an engagement allows the delivery manager to act before a cost overrun, not after.
What Generic ERPs Are Missing for IT Consulting Firms
ERPs such as SAP Business One, Sage Intacct, or Odoo in its standard configuration are built for flow-based businesses: orders, stock, delivery notes, purchases. Their data model is structured around products and transactions, not around time and projects.
| IT consulting firm need | SAP B1 | Sage Intacct | Odoo standard | What is missing |
|---|---|---|---|---|
| 90-day consultant planning | No | No | Partial | Multi-profile capacity view with alerts |
| Granular time tracking | No | No | Yes (Timesheets) | Management validation + billing export |
| Utilisation rate calculation | No | No | No | Native bench management module |
| Automated T&M billing | No | No | Partial | Link from validated timesheet to invoice |
| Real-time P&L per engagement | No | No | Partial | Fully loaded cost vs. recognised revenue analytics |
| Engagement end alerts | No | No | No | Sales notification module |
Odoo deserves a separate mention: with the Project, Timesheets, and Invoicing modules correctly configured, it covers a significant portion of the needs of an IT consulting firm with fewer than 50 consultants. But the configuration effort is substantial, and as soon as billing becomes more complex (milestone fixed price, contract amendments, multi-entity engagements), the limits of the standard setup become apparent.
PSA Platforms Built for IT Consulting Firms
BoondManager: the leading PSA for European consulting firms
BoondManager is built specifically for IT consulting firms, management consultancies, and staffing businesses. It covers the full cycle: sales CRM, staffing, time tracking, billing, HR reporting, and P&L per engagement. Originally a French solution, it is now used across Europe and available in English.
Pricing: Core plan at €59/manager/month + €4/consultant/month, Advanced plan (with AI features and multi-entity) at €79/manager/month + €4/consultant/month, Enterprise at €99/manager/month.
Strengths: interface designed for frontline users (sales, HR, consultant), strong bench management, integrated CRM/ATS module for recruitment, native T&M and fixed-price billing.
Limitations: financial reporting less powerful than full ERP solutions, best suited to firms up to approximately 500 consultants.
Fitnet Manager: project-centric billing and profitability
Fitnet Manager is a SaaS ERP dedicated to professional services firms since 2008. It targets IT consulting firms, audit firms, and engineering consultancies that need rigorous project billing and precise engagement tracking.
Pricing: from €10/user/month (Essentials) to €35/user/month (Premium), with intermediate Flex, Pro, and Plus plans.
Strengths: detailed engagement management, comprehensive billing module (T&M, fixed price, milestones, advances), integrated pre-accounting, strong value for money for firms of 20 to 200 people.
Limitations: less modern UX than BoondManager, lighter CRM and staffing features. Primarily French market.
Stafiz: forecasting and billing automation
Stafiz is a modular platform founded in 2016 that distinguishes itself through its forecasting-first approach. The forecasting module projects revenue and margin six months out from signed engagements, weighted pipeline, and resource availability.
Pricing: on request (the site redirects to a pricing form).
Strengths: advanced capacity forecasting, automated T&M billing, strong analytical reporting, targets consulting firms and IT staffing businesses between 20 and 500 people.
Kantata (formerly Mavenlink): global PSA for mid-market consulting firms
Kantata is the leading international PSA for professional services firms outside the French market. Born from the merger of Mavenlink and Kimble, it covers resource management, project delivery, billing, and profitability tracking.
Strengths: deep Salesforce integration, strong resource management and forecasting, suited to English-speaking markets and globally distributed firms, native multi-currency and multi-entity.
Limitations: higher implementation complexity and cost than European-focused alternatives. Better suited to firms above 100 consultants.
Certinia (formerly FinancialForce): PSA on Salesforce
Certinia is a native Salesforce application covering professional services operations: resource management, project billing, revenue recognition, and analytics. For firms already on Salesforce, it provides the tightest CRM-to-delivery integration available.
Strengths: real-time visibility from opportunity to cash, IFRS 15 revenue recognition built in, strong for global IT consulting firms with complex billing requirements.
Limitations: requires Salesforce licence as a prerequisite; total cost of ownership is significant.
Akuiteo: for larger consulting firms and multi-entity groups
Akuiteo is a French ERP for professional services and project-based businesses, positioned for more mature organisations (100 to 1,000 employees). It covers engagement management, staffing, bench management, complex billing, and multi-entity consolidation.
Pricing: on request.
Strengths: robust multi-entity features, complex project management (multi-milestone fixed price, amendments, subcontracting), strong analytics for consulting groups with multiple offices or practices.
Limitations: primarily French market focus; limited international track record compared to Kantata or Certinia.
Bench Management in Detail: How an ERP Reduces Unbilled Time
Bench time is the variable that under-equipped IT consulting firms manage too late. The optimal process relies on three levers that the best PSA platforms automate:
Anticipation: automatically detecting upcoming engagement endings in the next three to six weeks. A contract ending on 30 June should trigger a sales alert by 10 June at the latest. A PSA that integrates contract management can automate this alert.
Visibility: a “upcoming availability” dashboard filterable by profile, skill, location, and available-from date allows the staffing manager to propose consultants to the sales team before they even ask. Selling available profiles is faster than selling profiles that need to be freed from a current engagement.
Tracking: recording bench days by consultant, practice, and period allows the business to calculate the real cost of bench time (unbilled days × fully loaded daily cost) and set it against the commercial actions deployed. It is a performance indicator for HR and sales as much as for finance.
KPIs for IT Consulting Firm Leadership
A well-configured ERP/PSA management dashboard for an IT consulting firm should display in real time:
- Utilisation rate (percentage of billable consultants on engagement vs. total billable headcount): weekly indicator, with alerts when the trend declines.
- Billing backlog: amount of signed engagements not yet invoiced. Allows forecasting revenue for the coming weeks without assumptions.
- Current DSO: average invoice collection time. A DSO drifting above 50 days should trigger a collections campaign.
- Margin per engagement: net economic contribution of each active project. Under-performing engagements must be identified before the monthly close.
- Billable utilisation per consultant: ratio of billable hours to available hours in the period. Distinguishes under-utilised consultants from those in structural bench.
- Realization rate: ratio of billed revenue to theoretical revenue (hours logged × contracted daily rate). A rate below 95% signals hours entered but not billable (internal pre-sales, non-recharged training, client disputes).
Recommended Solution by Firm Size
IT consulting firms with fewer than 50 consultants
Odoo (Project, Timesheets, Accounting, and Invoicing modules) or BoondManager Core are the two most appropriate options. Odoo offers more flexibility but requires significant upfront configuration. BoondManager is ready to use for the IT consulting use case but less customisable. Total budget (licences + configuration): £15,000 to £40,000.
IT consulting firms with 50 to 200 consultants
This is the segment where generic tools most clearly show their limits and a dedicated PSA becomes necessary. BoondManager Advanced, Stafiz, or Fitnet Manager Pro are the strongest options for European and French-speaking markets. For English-speaking or globally distributed firms, Kantata enters the picture. The choice depends on whether the priority is forecasting (Stafiz), complex project billing (Fitnet), integrated HR and recruitment (BoondManager), or global reach (Kantata). Total budget: £40,000 to £120,000.
IT consulting firms with 200 to 500+ consultants and multi-office groups
Akuiteo (Europe/France-focused) or a full ERP suite with integrated PSA module — Microsoft Dynamics 365 Project Operations, Oracle NetSuite SRP, Certinia on Salesforce — becomes relevant. Multi-entity consolidation, subcontractor management, and regulatory compliance (mandatory e-invoicing, IFRS 15 for listed groups) justify the investment. Total budget: £120,000 to £400,000.
The 3 Traps of Migrating to a PSA or ERP
The first trap: trying to migrate five years of historical engagement data into the new system. This is a sinkhole of configuration effort and quality control. The pragmatic rule: migrate active contracts and clients, rebuild historical reporting in a dedicated BI tool if needed, and start clean on the past.
The second trap: underestimating consultant resistance to timesheet entry. A time tracking process that takes five minutes a week gets adopted. One that takes twenty minutes becomes a permanent friction point. Mobile interface quality is a selection criterion as important as financial functionality.
The third trap: neglecting sales team training on the new CRM/staffing module. Sales teams are typically the first users of a PSA (they enter opportunities, proposed daily rates, requested profiles). If their adoption is partial, the forecasting module is unusable for lack of reliable input data.
To explore PSA platforms further, see our comparison of PSA platforms for professional services: Kantata, Certinia, Unit4, Deltek and our guide to ERP treasury and cash flow management in real time. If your immediate challenge is bench time reduction, our analysis of ERP for professional services firms: staffing, project billing and profitability covers the fundamentals in depth.
