The verdict in three sentences
For a consulting firm, the gain is not in billing but in real-time time tracking tied to margin per engagement. A custom tool (EUR 30,000 to 75,000) merges timesheets, engagement budget, utilization rate and billing into a single control tower, with ROI driven by recovered margin points. Below 8 consultants a time-tracking SaaS suffices; beyond that, custom locks in profitability.
Cost per module of a 2026 custom tool
The core need of a Dublin firm: see in real time whether an engagement is slipping before it is too late.
| Module | Indicative cost | Key function |
|---|---|---|
| Timesheets + utilization | EUR 7,000 to 14,000 | Mobile entry, approval |
| Budget and engagement tracking | EUR 8,000 to 16,000 | Budget vs actual, slippage alerts |
| Per-engagement profitability | EUR 6,000 to 12,000 | Margin, average day rate |
| Billing + accounting integration | EUR 7,000 to 15,000 | Invoices, export to accounting |
| Partner reporting | EUR 4,000 to 9,000 | Pipeline, backlog, forecasts |
| Total tool | EUR 30,000 to 75,000 | 10 to 16 weeks |
5-year TCO and margin impact
Maintenance runs 8 to 12 %/year. Here is an order of magnitude for a EUR 50,000 tool and a firm billing EUR 2.4 M/year.
| Item | Amount |
|---|---|
| Tool development (year 1) | EUR 50,000 |
| Maintenance 4 years (10 %/year) | EUR 20,000 |
| Hosting + support 5 years | EUR 12,000 |
| 5-year TCO (approx.) | EUR 82,000 |
| Estimated margin gain (+3 pts on 2.4 M) | ~+EUR 72,000/year |
2026 order-of-magnitude estimates.
Mini case study
Thomas, partner at a 14-consultant firm in Dublin, ran engagements on Excel with a 10-day lag on logged time. Result: overruns detected too late, eroded margin. After a custom tool at EUR 50,000 with mobile entry and slippage alerts, billable utilization rose from 63 % to 68 % and margin by +3 points. On EUR 2.4 M in revenue, those 3 points represent roughly EUR 72,000/year of additional margin. Partner reporting dropped from 2 days/month to 1 hour. ROI in about 14 months.
FAQ
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How much does a custom engagement management tool cost in 2026?
From EUR 30,000 to 75,000 depending on modules (time, engagement budget, profitability, billing, reporting). A 10-to-15 consultant firm lands around EUR 45,000 to 60,000.
When does a time-tracking SaaS suffice?
Below 8 consultants or for simple engagements, a SaaS at EUR 10-20/user/month covers the need. Custom is justified when margin per engagement becomes the central issue.
Does the tool integrate with accounting?
Yes: automatic export of invoices and entries to your accounting software or ERP, removing double entry and making margin tracking reliable.
Can overruns be detected in real time?
Yes: the budget module continuously compares consumed vs sold budget and triggers alerts as soon as a threshold (e.g. 80 %) is reached, before margin is lost.
How long to implement?
10 to 16 weeks. Timesheets and engagement tracking ship first, then billing and reporting.
Let's scope your project. Share your consultant count, annual revenue and accounting tool: we price time, profitability and billing. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
