Build vs Buy: Custom SaaS vs Off-the-Shelf Cost Benchmark in Singapore (2026)

The verdict in three sentences

Below 30 users, a market SaaS is almost always the most cost-effective choice. Beyond 80 to 90 seats, or when the annual licence exceeds USD 85,000, a custom build becomes competitive over 3 years and frees you from vendor lock-in. The real decision is not about entry price but total cost of ownership (TCO) and how strategic the process is.

The real cost of both scenarios

A SaaS is pay-per-use: per-user licence, add-on modules, and usually a mandatory "Enterprise" tier above a certain volume. Custom software amortises: a large upfront investment, then maintenance of around USD 1,800 per month.

The 3-year tipping point

For 90 users at USD 70/month, the SaaS costs about USD 75,600 per year, or USD 226,800 over 3 years. A build at USD 190,000 plus USD 21,600 annual maintenance totals USD 254,800 over 3 years: the SaaS still wins. But over 5 years, the SaaS reaches USD 378,000 versus USD 298,000 for the custom platform, which becomes a balance-sheet asset with no pricing-hike risk.

These are 2026 order-of-magnitude figures: an 8 % annual licence hike (common) pulls the tipping point forward by a year.

Mini case study

Daniel, COO of a 110-employee manufacturing firm in Singapore, pays a production-management SaaS USD 78/user/month for 85 licences, or USD 79,560/year. The vendor announced +9 % for 2026 and charges USD 5,000 per API connector. Projected over 5 years with the increase, the SaaS bill exceeds USD 420,000. A custom build covering his core process is quoted at USD 185,000 + USD 1,800/month maintenance, or USD 293,000 over 5 years. Projected saving: over USD 125,000, plus the end of API constraints. He launches a targeted build on his scheduling module while keeping SaaS for payroll.

FAQ

Above how many users does custom become worthwhile?

Generally beyond 80 to 90 seats, or once the annual licence tops USD 85,000. Below that, SaaS absorbs the fixed development cost better.

Won't custom software cost more in maintenance?

Budget 15 to 20 % of the build cost per year, roughly USD 1,800/month for a USD 190,000 project. It is predictable, unlike SaaS licence hikes that often hit 8 to 10 % per year.

Can you mix both approaches?

Yes, and it is recommended: custom for the differentiating core process, SaaS for standard functions (payroll, accounting, email). This caps the investment at the strategic scope.

How long does it take to build custom software?

Expect 14 to 24 weeks for a substantial business scope, versus 6 to 12 weeks to configure a SaaS. The timeline pays off over the tool's lifespan.

What does SaaS exit cost represent?

Data migration, retraining and rebuilding integrations often cost USD 18,000 to 50,000. It is a hidden cost to include in the TCO, absent from custom software you own.

Let's scope your project. Give us your seat count, current SaaS bill and the process to cover: we model your 5-year TCO and quote a targeted build. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.