The verdict in three sentences
An internal operations web app with three modules (purchasing, leave, expense claims) costs roughly USD 55,000 to 150,000 in Singapore in 2026. Local developer day rates of USD 450 to 850 put custom software within reach of a 60-person SME, with a 12 to 16 week timeline. The deciding argument is not technical: it is the 10 hours a week returned to the admin team and the end of copy-paste errors across 14 Excel files.
Reading a quote module by module
The managing director of a 60-person Singapore SME runs purchasing, leave and expense claims across 14 Excel files shared by email. The result: conflicting versions, leave approved twice, and expenses reimbursed 6 weeks late. A serious quote breaks down cost by module, not as a single lump sum.
| Module | Key features | Estimated days | Indicative cost (USD) |
|---|---|---|---|
| Core (accounts, roles, org chart) | Login, profiles, approval hierarchy | 15 to 25 | 8,000 to 18,000 |
| Purchasing | Request, 2-level approval, purchase order, supplier tracking | 30 to 55 | 16,000 to 41,000 |
| Leave and absence | Balances, requests, team calendar, payroll export | 20 to 35 | 11,000 to 26,000 |
| Expense claims | Receipt photo, limits, approval, accounting export | 20 to 40 | 11,000 to 30,000 |
| Dashboard and exports | KPIs, Excel and PDF exports | 8 to 15 | 4,000 to 11,000 |
| Testing, training, go-live | Tests, 3 training sessions, documentation | 8 to 15 | 4,000 to 11,000 |
| Total | 3 modules + core | 101 to 185 | 55,000 to 137,000 |
With a 10% contingency, the top of the range reaches about USD 150,000. Singapore GST at 9% comes on top.
Comparing vendor profiles
| Vendor | 2026 day rate (USD) | Advantage | Risk |
|---|---|---|---|
| Junior freelancer | 300 to 450 | Low price | No continuity, little testing |
| Senior freelancer | 550 to 750 | Good value | Limited availability |
| Singapore agency | 650 to 850 | Full team, warranty | Higher price |
| Nearshore team (Vietnam, Malaysia) | 300 to 500 | Lower cost | Coordination overhead |
| HR or procurement SaaS | USD 8 to 20 per user per month | Fast setup | Hard to adapt to internal workflows |
For 60 users, a SaaS at USD 15 per user costs USD 10,800 a year, or over USD 54,000 across 5 years, without control over approval workflows, and usually several tools are needed to cover all three modules. Custom software becomes competitive from year three.
A 12 to 16 week schedule
| Weeks | Stage |
|---|---|
| 1 to 2 | Discovery, mapping of the 14 Excel files, mockups |
| 3 to 5 | Core and purchasing module |
| 6 to 9 | Leave module and expense module |
| 10 to 12 | Dashboard, migration of Excel data |
| 13 to 16 | Acceptance testing, training, phased rollout by department |
Data migration is often missing from quotes: plan 5 to 10 days to clean and import leave balances and supplier history.
Mini case study
Sam, managing director of a 60-person distribution SME in Singapore, accepts a USD 98,000 quote for the three modules. His 3-person admin team currently spends 10 hours a week consolidating files, chasing approvals and fixing errors. At a loaded cost of USD 45 an hour, that is USD 450 a week, or USD 20,700 a year.
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He adds indirect gains: 2% savings on USD 1.6 million of annual purchasing thanks to the approval workflow and supplier comparison, or USD 32,000. Estimated total gain: USD 52,700 a year. With maintenance at USD 10,000 a year, payback lands around 2 years and 4 months.
FAQ
Can we start with a single module?
Yes, and it is often advisable: core plus leave costs USD 19,000 to 44,000 and ships in 6 to 8 weeks. The other modules are added later without a rebuild.
Can the app export to our payroll and accounting software?
Yes, an export in your software's format costs USD 2,700 to 8,000 per connector. A direct API integration costs more, USD 7,000 to 16,000 depending on the software.
Does the app need to be hosted in Singapore?
It is not mandatory, but the PDPA governs transfers of personal data abroad. Local or regional hosting costs USD 200 to 800 a month.
What does maintenance cost?
Plan 8 to 15% of the initial cost per year, or USD 8,000 to 15,000 for a USD 98,000 project. That covers fixes, security updates and small enhancements.
Does the app work on mobile?
Yes, a responsive interface is included in the ranges. A native mobile app would add USD 35,000 to 70,000, rarely useful for internal use.
Let's scope your project. Send us the list of your Excel files and approval workflows: we will price an internal operations app between USD 55,000 and 150,000, delivered in 12 to 16 weeks. 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.
