Teams frame the decision to build or buy workforce software as a technical question. It's a cost and ownership question, with technical factors as inputs.
Most teams should start with SaaS. Some should build. The distinction comes down to math and fit.
SaaS: The Default Starting Point
SaaS workforce tools cover standard workflows: clock-in and clock-out, basic scheduling, leave management, and payroll export. For teams that need these features and nothing unusual, SaaS delivers day-one functionality at low upfront cost.
At €60 per month, a SaaS subscription costs €720 per year and €2,160 over three years. The subscription includes updates, support, and infrastructure. You do not own the tool.
Custom: The Math That Changes the Answer
Custom software earns its cost in two situations.
First: your workflow doesn't fit SaaS. A POS integration your provider won't build, a compliance rule specific to your country, a shift structure no off-the-shelf tool handles - these turn SaaS into a constant workaround rather than a solution.
Second: the long-term cost favors building. A custom tool at €12,000 upfront with no monthly fee breaks even against a €60/month subscription at month 30. From month 31, the custom tool costs less. You own it and you stop paying.
At €60/month × 36 months = €2,160. At €80/month × 36 months = €2,880. Break-even against a €12,000 build falls between 2.5 and 3.5 years depending on the subscription price.
The Decision Rule
Calculate: SaaS monthly cost × 36 months. If that number is lower than a custom build cost, start with SaaS and revisit the question at year three. If not - or if missing features cause real business friction - build.
Business friction is the harder variable. If a SaaS gap forces two staff members to run manual workarounds for 2 hours each week, that's over 200 hours of labour per year. Add it to the SaaS total before comparing.
Custom Doesn't Mean Zero Ongoing Cost
A €12,000 build requiring €3,000 per year in maintenance costs €21,000 over three years - more than many SaaS alternatives. Scope maintenance before committing to build.
Custom software also demands internal ownership. Someone on your team manages the vendor relationship, defines requirements for updates, and handles issues. That overhead is real and recurring.
A Note on the Missing 20%
SaaS gaps are rarely about features that don't exist. They're about features that exist but don't match your workflow precisely enough to be useful. A scheduling tool that handles five shift types when you need eleven isn't broken - it just doesn't fit. That gap is worth building around only if the manual workaround costs more than the build.
Rezano
Rezano offers both paths: a SaaS platform for teams that need standard workforce management, and a custom build service for teams with requirements SaaS won't cover.