SME HR & Payroll (SIRH) Software: Custom vs SaaS 2026 Costs

The verdict in three sentences

For an SME of 80 to 300 employees, a packaged SaaS HRIS at EUR 5-12/employee/month covers 80% of needs and deploys fast. Custom at EUR 45,000-95,000 doesn't replace the payroll engine: it builds an HR core (self-service, workflows, expenses) connected to outsourced payroll when your processes or multi-country setup fall outside the SaaS boxes. The 2026 gain: a 50% cut in leave-management time and HR data hosted in the EU, GDPR-compliant.

What an HRIS costs in 2026

Budget scales with headcount, scope (payroll, leave, expenses, onboarding) and the payroll connector. Below are 2026 orders of magnitude for a 200-employee SME.

SaaS is the default for a single-country SME with standard processes; custom is justified for specific approval workflows, a multi-country organisation or a strong data sovereignty requirement.

The operational impact on leave management

Leave, absence and expense management is where an SME loses the most admin time. Here's the quantified impact of a well-designed HR core.

Across 200 employees, halving leave-management time frees about 0.4 HR FTE, i.e. ~EUR 18,000/year of capacity redeployed to higher-value work.

Mini case study

Nadia, HR director of a 200-employee industrial SME in Berlin (across 2 countries), managed leave and expenses via email and spreadsheets, sinking 55 HR hrs/month. She deploys a custom HR core: self-service + workflow build EUR 72,000 + payroll connector EUR 11,000 + maintenance EUR 1,400/month. Absence management drops to 27 hrs/month (-50%, ~0.4 FTE at EUR 45,000 = ~EUR 18,000/year) and payroll errors fall below 1%, avoiding ~EUR 9,000/year of adjustments. Year 1 cost: ~EUR 99,800; recurring gains: ~EUR 27,000/year. Payback around 30 months, with an owned, compliant HR asset.

FAQ

Does custom replace the payroll software? No, and that's key. We don't rebuild the payroll engine (too regulated): we build the HR core and connect it to your outsourced payroll or vendor (ADP, DATEV...) via a EUR 7,000-14,000 connector.

Isn't a SaaS HRIS GDPR-compliant? Many are, but hosting is often outside the EU. Custom guarantees EU hosting (OVH/Scaleway), data minimisation and a controlled processing register.

What headcount justifies custom? Below 80 employees, SaaS is almost always more rational. Between 80 and 300, the switch depends on workflow specificity and multi-country needs more than headcount alone.

How long to deploy? Plan 10 to 16 weeks, with a pilot on one module (leave) by week 8 to validate adoption before adding expenses and onboarding.

How do we ensure employee adoption? Self-service must be mobile-first and take under a minute to book leave. We scope ergonomics and notifications from design to avoid a return to email.

Let's scope your project. Tell us your headcount, payroll software and countries of operation: we benchmark SaaS HRIS vs custom core. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.