The verdict in three sentences
A private school running enrolment, grades and family billing in separate tools multiplies re-entry and untracked unpaid invoices. A school SaaS covers the essentials at a low cost per student; custom is justified as soon as the group grows or billing becomes specific. Either way, GDPR compliance on minors' data is not optional.
School SaaS or custom platform: 2026 costs
The calculation depends mostly on student numbers and how specific family billing is. 2026 orders of magnitude (kept in EUR):
| Item | 2026 range (EUR ex. VAT) | Note |
|---|---|---|
| School SaaS (per student/year) | 3 - 12 | Enrolment, grades, communication |
| Custom build | 30,000 - 85,000 | Full platform |
| Family billing module | 6,000 - 14,000 | Schedules, reminders, receipts |
| Maintenance (annual) | 12 - 16 % of build | Evolutions + regulatory |
| Developer day rate | 450 - 620 | Experienced profile |
A custom build typically takes 12 to 20 weeks. SaaS deploys in a few weeks but constrains your processes.
The tipping point: when custom pays off
| Students | SaaS at ~EUR 8/student/year | Custom amortised over 5 years (EUR 55,000 + 14 % maintenance) |
|---|---|---|
| 300 students | 2,400 EUR/year | ~18,700 EUR/year |
| 600 students | 4,800 EUR/year | ~18,700 EUR/year |
| 900 students | 7,200 EUR/year | ~18,700 EUR/year |
| 1,500 students | 12,000 EUR/year | ~18,700 EUR/year |
| 2,500 students | 20,000 EUR/year | ~18,700 EUR/year |
At constant SaaS pricing, custom becomes competitive above ~2,300 students on pure cost. But the real tipping point (400 to 900 students) arrives earlier once family billing or enrolment workflows leave the standard: SaaS then forces workarounds that cost time.
Mini case study
Mr Bertrand, head of a private school group of 720 students in Miami, stacked a grades SaaS, accounting software and manual unpaid-invoice reminders. Family reminders took ~25 h/month of admin time and ~4 % of invoices went late. A custom platform at EUR 58,000 with a billing module (EUR 10,000) and 14 % maintenance (EUR 9,520/year) automates schedules and reminders. Gain: ~20 h/month freed, late unpaid invoices brought under 1.5 %, and a single GDPR-compliant base for minors' data.
FAQ
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How much does private school management software cost in 2026?
A school SaaS costs EUR 3 to 12 per student per year; a custom build EUR 30,000 to 85,000. For 700 students, SaaS runs ~EUR 2,100-8,400/year depending on the vendor.
From how many students is custom worth it?
The tipping point often sits between 400 and 900 students, earlier if family billing is specific. On pure cost, you need ~2,300 students to match a SaaS at EUR 8/student.
Is GDPR compliance for minors' data included?
It must be: consent, data minimisation, EU hosting and bounded retention. A serious custom build bakes these rules in from scoping.
How long for a custom build?
Between 12 and 20 weeks depending on modules. Family billing (EUR 6,000-14,000) is often the longest module to specify.
What annual maintenance budget?
Budget 12 to 16 % of build cost per year for evolutions and regulatory updates.
Let's scope your project. Give us your student count and billing specifics: we compare SaaS and custom with an indicative budget. 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.
