The verdict in three sentences
For a consulting firm in Singapore, a PSA (Professional Services Automation) SaaS at 40-130 USD/user/month covers time tracking, staffing and billing with fast onboarding. Custom software at 45 000-105 000 EUR pays off when you want fine control of margin per assignment and native accounting integration. The ROI is direct: making the billing rate visible tends to lift it by around 10 points.
What PSA software costs in 2026
The 2026 market offers mature PSA tools for firms. Here are the orders of magnitude seen in Singapore.
| Solution | Entry cost | Recurring cost | Lead time |
|---|---|---|---|
| PSA SaaS (per user) | 0-3 000 USD setup | 40-130 USD/user/month | 2-5 weeks |
| Time tracking + expenses | included to 2 000 USD | subscription | 1-3 weeks |
| Billing + accounting connector | included to 4 000 USD | subscription | 2-4 weeks |
| Integrated custom build | 45 000-105 000 EUR | 12 %/yr maintenance | 5-8 months |
| Hybrid SaaS + connectors | 16 000-38 000 EUR | subscriptions + 10 % maintenance | 3-4 months |
For a 12-consultant firm, PSA SaaS runs 5 760-18 720 USD/year. Custom is justified once margin control and staffing become strategic.
Custom builds: what the budget covers
A 45 000-105 000 EUR project relies on a day rate of 460-740 EUR. Maintenance at 12 %/yr covers security, evolutions and support.
| Work item | Indicative effort | Budget (2026 order of magnitude) |
|---|---|---|
| Scoping + assignment model | 8-12 days | 5 000-9 000 EUR |
| Time tracking + mobile entry | 15-25 days | 9 000-19 000 EUR |
| Staffing + capacity plan | 15-25 days | 9 000-19 000 EUR |
| Billing + margin per assignment | 18-28 days | 11 000-21 000 EUR |
| Accounting connector + reporting | 10-18 days | 6 000-14 000 EUR |
| Testing + rollout | 8-12 days | 5 000-9 000 EUR |
The margin-per-assignment module is the highest-return item: it turns a gut feeling into hard, assignment-by-assignment steering.
Mini case study
Camille, director of a 12-consultant firm in Singapore, bills an average day rate of 720 EUR across ~200 billable days/consultant/year. Her real billing rate is estimated at 68 %, for lack of rigorous time tracking.
She invests 72 000 EUR in a custom build with mobile time tracking and visible margin per assignment. Target: move from 68 % to 78 % billing rate, i.e. +10 points x 12 consultants x 200 days x 720 EUR = +172 800 EUR billable revenue/year at constant capacity. Even capturing only half that potential, the project pays back in under a year, maintenance (8 640 EUR/yr) included.
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FAQ
Is a PSA SaaS enough for a small firm?
Yes: below 10-12 consultants, a PSA SaaS at 40-130 USD/user/month is the best cost/speed ratio. Custom is justified once margin control and staffing become strategic.
How do you calculate margin per assignment?
The system cross-references logged time, day rate and internal costs to show a real-time net margin per assignment. It's the item that most changes the firm's steering culture.
What does annual maintenance cost?
Maintenance sits around 12 %/yr, i.e. 5 400-12 600 EUR/year for a 45 000-105 000 EUR project, covering security, evolutions and support.
Can you connect existing accounting?
Yes, via API or export. Budget 10-18 days of effort for the accounting connector, which avoids double entry between billing and accounting.
Are prices comparable in Nantes?
In Nantes, PSA SaaS trades closer to 30-100 EUR/user/month, with custom development costs close to Singapore's, adjusted to local day rates.
Let's scope your project. Share your consultant count, accounting tool and staffing/margin-steering needs and we'll price PSA SaaS vs custom. 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.
