The verdict in three sentences
A vertical SaaS platform (dedicated to one specific industry) is built in Singapore for 85,000 to 210,000 SGD over 5 to 9 months, around five pillars: multi-tenancy, role management, subscription billing, API and onboarding. The item that widens the gap is not the number of screens but the multi-tenant architecture and the domain depth of your sector. At a senior team rate of 750 to 1,050 SGD/day, phasing in two milestones (core then differentiators) cuts risk and smooths cash flow.
What the price is made of
A vertical is not an MVP: it targets customers who will pay 300 to 2,800 SGD/month and demand reliability, fine-grained roles and integrations. Here are the 2026 ranges (order of magnitude).
| Pillar | Scope | Cost | Timeline |
|---|---|---|---|
| Multi-tenant architecture | Data isolation, tenants, scalability | 17,000 - 40,000 SGD | 3 - 6 wk |
| Roles & permissions | RBAC, teams, invites, audit | 11,000 - 25,000 SGD | 2 - 4 wk |
| Subscription billing | Plans, quotas, Stripe, proration, dunning | 11,000 - 22,000 SGD | 2 - 4 wk |
| Domain modules | 3 to 5 industry-specific modules | 28,000 - 77,000 SGD | 8 - 16 wk |
| API & webhooks | Public API, keys, docs, rate limit | 8,000 - 20,000 SGD | 2 - 4 wk |
| Onboarding & admin | Setup wizard, back-office, support | 8,000 - 26,000 SGD | 2 - 5 wk |
A tight vertical starts at 85,000 - 125,000 SGD; with a rich API, advanced RBAC and 5 domain modules, you reach 170,000 - 210,000 SGD.
Multi-tenancy, day rates and phasing
Multi-tenancy drives everything: three models, three budgets, three risk profiles.
| Multi-tenant model | Isolation | Extra upfront | Good for |
|---|---|---|---|
| Shared DB + tenant_id | Logical | +0 to 11,000 SGD | Volume, SMBs, thin margins |
| Schema per tenant | Medium | +11,000 to 28,000 SGD | Sensitive data, regulated sectors |
| DB per tenant | Strong | +28,000 to 63,000 SGD | Enterprise, strict compliance |
In Singapore in 2026, a senior team (lead + 2 devs + design) bills 750 to 1,050 SGD/day, i.e. 14,000 to 21,000 SGD/week at full pace. Phase it: a milestone 1 at 78,000 - 105,000 SGD delivers the sellable core (multi-tenant, roles, billing, 2 modules) in 3-4 months, then a milestone 2 at 50,000 - 85,000 SGD adds API and differentiating modules once the first customers sign.
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Mini case study
Aurelie, co-founder of a vertical SaaS for accounting firms in Singapore, targets 90 firms at 550 SGD/month. Milestone 1 scope: schema-per-tenant multi-tenancy (sensitive data), RBAC, billing, client-file module and tax-deadline module. Quote: 100,000 SGD, delivered in 15 weeks. With 90 customers the target ARR is 90 x 550 x 12 = 594,000 SGD. Milestone 1 is amortized at 100,000 / (550 x 0.85) = 214 customer-months, i.e. about 18 firms over 12 months. She signs 25 in year one and unlocks milestone 2 (API + client portal) at 68,000 SGD.
FAQ
Why does a vertical cost more than a horizontal SaaS? Because value comes from domain depth: 3 to 5 specific modules, regulated workflows and sector integrations. These modules represent 35 to 50 % of budget, i.e. 28,000 to 77,000 SGD.
What day rate to plan in Singapore in 2026? A senior freelancer runs 750 - 900 SGD/day, a structured studio 800 - 1,050 SGD/day. A full 4-person team costs 14,000 - 21,000 SGD/week.
How much is annual maintenance? Budget 12 to 20 % of build cost, i.e. 12,000 to 42,000 SGD/year, plus multi-tenant infra (700 to 3,500 SGD/month depending on tenant count and isolation model).
Can we launch without the public API? Yes: defer the API to milestone 2. It represents 8,000 to 20,000 SGD and is only useful when customers request integrations, often after 20 to 30 active accounts.
How long to a sellable product? Milestone 1 (sellable core) ships in 3 to 4 months; the full platform with differentiators in 5 to 9 months. Signing customers at milestone 1 funds the rest.
Let's scope your project. Specify your target sector, the number of domain modules and your tenant model; we scope a phased vertical between 85,000 and 210,000 SGD. 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.
