The verdict in three sentences
A consulting firm that runs staffing, timesheets and margin in Excel loses money without seeing it: per-engagement margin is only known after the fact. A SaaS PSA at EUR 25-55/user/month industrialises tracking and is enough for many firms; a custom platform at EUR 60,000-130,000 earns its place when your staffing model, grade-based day rates and billing have their own logic. The quantified 2026 gain: +5 to +9 margin points via real-time day-rate tracking and -6 hrs/week of entry per manager.
What engagement management software costs in 2026
Cost scales with consultant count and integration depth (billing, accounting, BI). Below are 2026 orders of magnitude for a 40-consultant firm.
| Line item | Market SaaS PSA | Custom platform |
|---|---|---|
| License / year (40 consultants) | EUR 12,000 - 26,000 | EUR 0 (owned) |
| Initial build | setup incl. EUR 3,000-8,000 | EUR 60,000 - 130,000 |
| Billing + accounting integration | EUR 4,000 - 9,000 | EUR 8,000 - 15,000 |
| Monthly maintenance | included (support) | EUR 1,000 - 2,200/month |
| Time to go live | 4 - 8 weeks | 12 - 18 weeks |
| 3-year total (estimate) | EUR 55,000 - 110,000 | EUR 105,000 - 220,000 |
SaaS wins for a standard firm that wants to move fast; custom wins when margin steering becomes a competitive edge or when user count blows up the license bill.
What real-time steering changes on margin
The core of the value is utilization rate and per-engagement margin. Here's the quantified impact of moving from Excel to a structured tool.
| Indicator | Excel steering | Structured tool |
|---|---|---|
| Average utilization rate | 62 - 68% | 72 - 78% |
| Per-engagement margin visibility | T+30 (post-billing) | real-time |
| Entry time / manager / week | 8 - 10 hrs | 2 - 4 hrs (-6 hrs) |
| Consultants on unstaffed bench | 12 - 18% | 6 - 10% |
| Billing delays | frequent | near zero |
| Net margin points gained | baseline | +5 to +9 pts |
For a firm at EUR 6M revenue, +6 net margin points is EUR 360,000 of extra result per year, without selling one more engagement.
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Mini case study
Julian, managing partner of a 40-consultant firm in Berlin (EUR 6M revenue, 14% net margin), ran everything in Excel with a 65% utilization rate. He deploys a custom platform: build EUR 95,000 + billing/accounting integration EUR 12,000 + maintenance EUR 1,600/month. Optimised staffing lifts utilization to 73% and net margin to 20%, i.e. +6 points = ~EUR 360,000/year. Managers save 6 hrs/week (~5 managers x 6 hrs x 45 wks at EUR 60 = ~EUR 81,000/year). Year 1 cost: ~EUR 126,200; year 1 gains: ~EUR 440,000. Payback in about 4 months.
FAQ
Isn't a SaaS PSA enough for 40 consultants? Often yes, if your staffing and billing model is standard. Custom is justified when you have grade-based day-rate rules, mixed fixed-price/T&M engagements or specific margin BI that SaaS doesn't model.
How does custom win margin points? By making utilization, bench and per-engagement margin visible in real time: partners reallocate consultants before an engagement drifts, rather than at billing time.
Can we connect our billing tool? Yes. We integrate your billing and accounting (DATEV, Sage, Xero...) for EUR 8,000-15,000 to avoid re-entry and make recognised revenue reliable.
How long to go live? Plan 12 to 18 weeks of build, with a first staffing + timesheets version delivered around week 8 for a pilot on one business unit.
How do we manage consultant change management? Entry must take under 3 minutes/day, mobile-first. A heavy tool goes unfilled: we scope ergonomics and automated reminders from the design workshop.
Let's scope your project. Give us your consultant headcount, revenue and current billing tool: we benchmark SaaS PSA vs custom platform. 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.
