The verdict in three sentences
For a firm of 45 staff and 70 statutory audit engagements, the real issue is not the working-paper tool, it is the gap between time budget and actuals that nobody sees before the invoice. Off-the-shelf software costs EUR 60 to 150 per user per month, or EUR 32,000 to 81,000 a year, while a custom module at EUR 25,000 to 50,000 connected to your practice management system pays back in 12 to 18 months. The measurable lever is simple: recovering 8 to 12% of unbilled hours, which weighs far more than license fees.
What an audit engagement tracking tool must cover
A firm combining accounting services and statutory audit juggles three logics: team scheduling, documentation of work compliant with auditing standards, and profitability per engagement. Working-paper tools handle the second very well, rarely the third.
| Feature | Off-the-shelf audit software | Kolonell custom module |
|---|---|---|
| Digital working papers and reviews | Yes, very complete | Connected to the existing tool via API or export |
| Time budget per engagement and per cycle | Basic, often per engagement only | Per cycle (inventory, revenue, cash) and per staff member |
| Real-time budget vs actuals | Monthly report | Daily dashboard with alerts at 80% |
| Link to practice management software | Rare or paid add-on | Sync of time entries and clients |
| Team scheduling for busy season | Extra module | Included, weekly view per partner |
| Fee billing tracking | Missing | WIP, overruns, suggested fee extensions |
| Indicative 2026 cost | EUR 60 to 150 per user per month | EUR 25,000 to 50,000 then EUR 300 to 600 per month |
The most profitable approach is hybrid: keep the working-paper software your auditors know and add a steering layer that reads time entries, compares them with the engagement letter budget and alerts the signing partner before the overrun.
Licenses or custom: the five-year math
A license looks cheap per month, but it multiplies by headcount and never goes down. Here is a 2026 order of magnitude for a 45-person firm.
| Five-year cost item | Full off-the-shelf suite | Hybrid: audit tool + custom module |
|---|---|---|
| Licenses (45 users) | 45 × EUR 110 × 60 months = EUR 297,000 | Audit tool only, 25 auditors × EUR 70 × 60 = EUR 105,000 |
| Initial development | EUR 0 to 8,000 setup | EUR 38,000 |
| Maintenance and hosting | Included | EUR 450 × 60 months = EUR 27,000 |
| Staff training | EUR 6,000 | EUR 4,000 |
| Five-year total | about EUR 305,000 | about EUR 174,000 |
| Hours recovered per year (estimate) | 3 to 5% | 8 to 12% |
Custom is not always cheaper: for a 10-person firm, a license remains the right choice. Above 30 staff with a structured audit practice, the gap becomes clear, especially if the tool flags overruns early enough to negotiate additional fees.
Timeline, security and compliance
A steering module is delivered in 10 to 14 weeks: 2 weeks of scoping with partners, 6 to 8 weeks of development, 2 weeks of acceptance testing on 5 pilot engagements. Data stays hosted in the EU, encrypted, with strong authentication and access logs, which meets auditor confidentiality requirements and GDPR. Starting in May or June avoids disrupting the December year-end season.
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Aoife, partner at an accounting and audit firm in Dublin, oversees 70 engagements with a total budget of 14,000 hours a year. The average billed hourly rate is EUR 95. Without steering, about 10% of hours, or 1,400 hours, are consumed beyond budget with no fee extension. With alerts at 80% of budget per cycle, the firm recovers half of them through extra fees or reorganization: 700 hours × EUR 95 = EUR 66,500 a year. For a module at EUR 38,000 and EUR 5,400 of yearly maintenance, payback comes in under 8 months.
FAQ
Can we keep our current working-paper software?
Yes, and it is recommended. The custom module connects via API or scheduled export, which avoids retraining 25 auditors and preserves 100% of file history.
How long before we see results?
The first budget vs actuals dashboards are usable at acceptance, 10 to 14 weeks after kickoff. A review after one full season measures the 8 to 12% of hours recovered.
Is our audited clients' data safe?
Hosting is in the EU, data is encrypted at rest and in transit, and every access is logged. Rights are set per engagement, so a staff member only sees the engagements they are assigned to.
What budget for a smaller firm?
For 15 to 25 staff, a reduced scope (budget vs actuals and alerts) costs between EUR 18,000 and 25,000. Below 10 people, off-the-shelf software at EUR 60 per user per month is enough.
Does the module also handle accounting engagements?
Yes, the same logic applies to bookkeeping, review and advisory work. Many firms discover overruns are larger on payroll engagements than on audit, sometimes 15%.
Let's scope your project. We define the scope with you (time steering, scheduling, billing), an indicative budget between EUR 25,000 and 50,000 and a realistic delivery date before your next busy season. 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.
