The verdict in three sentences
For a company with 400 employees, 1,200 expense claims per month and three approval levels, an off-the-shelf SaaS costs SGD 43,000 to 84,000 per year in licences, forever. A custom application requires SGD 43,000 to 86,000 upfront, then roughly SGD 8,700 per year in maintenance, and pays for itself between year two and year three. Custom software makes most sense when your approval rules, chart of accounts or integrations do not fit the boxes vendors provide.
SaaS or custom: what a Singapore company really pays
Vendors such as Spendesk, Expensify, Jaz or Volopay charge per active user per month. For 400 employees the bill climbs quickly, especially because the features a CFO actually needs (multi-entity, advanced accounting export, complex approval rules) often sit in the higher plans.
| Cost item (2026 estimate) | Off-the-shelf SaaS | Custom application |
|---|---|---|
| Unit price | SGD 9 to 17.50 per user per month | No per-user cost |
| Annual licences (400 users) | SGD 43,000 to 84,000 | SGD 0 |
| Upfront investment | SGD 0 to 7,000 setup | SGD 43,000 to 86,000 |
| Maintenance and hosting | Included | About SGD 8,700 per year |
| 3-year total cost | SGD 129,000 to 252,000 | SGD 69,000 to 112,000 |
| 5-year total cost | SGD 215,000 to 420,000 | SGD 86,000 to 130,000 |
| Time to go live | 2 to 6 weeks | About 3 months |
SaaS wins on deployment speed and zero project risk. Custom wins on total cost once headcount exceeds 150 to 200 active users, and the company owns the asset.
The features that drive the budget
A serious expense tool is more than a form. The costly parts are receipt OCR, the approval rules engine and the accounting integration. Here is a realistic breakdown for a custom project delivered in 3 months.
| Module | Scope | Estimated budget |
|---|---|---|
| Mobile and web capture | Receipt photo, categories, mileage claims at company rates | SGD 8,500 to 14,500 |
| Receipt OCR | Reads amount, GST and merchant, 90 to 95% recognition rate | SGD 5,800 to 13,000 |
| Approval workflow | 3 levels, delegations, category caps, automatic reminders | SGD 10,000 to 18,800 |
| Accounting integration | Export to Xero, NetSuite or SAP Business One, cost centres | SGD 7,200 to 17,300 |
| Controls and compliance | Duplicates, policy caps, 5-year record retention under IRAS rules | SGD 5,800 to 11,500 |
| CFO dashboards | Spend by department, average approval time, alerts | SGD 5,800 to 11,500 |
The low end matches a tight scope with one accounting system and stable approval rules. The high end covers several legal entities and corporate cards.
When SaaS remains the better choice
SaaS remains relevant if you have fewer than 150 users, if you want integrated virtual cards without a banking project, or if your finance team has no time to drive a specification. It is less relevant when the CFO spends hours working around rigid approval rules or reworking accounting exports every month. That lost time is a hidden cost that often amounts to 0.3 to 0.5 FTE in a mid-sized company.
Mini case study
Rachel, CFO of a 400-employee engineering firm in Singapore, currently pays SGD 13 per user per month, or SGD 62,400 per year. Her team also reworks exports by hand, about 25 hours per month at SGD 65 loaded cost, or SGD 19,500 per year. Real annual cost: SGD 81,900.
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A custom app at SGD 65,000 with SGD 8,700 annual maintenance and automatic accounting export removes that rework. Over 3 years, Rachel spends SGD 91,100 instead of SGD 245,700 with the current setup, a saving of about SGD 154,600. Break-even comes around month ten after go-live.
FAQ
How much does a custom expense app cost in 2026?
Budget SGD 43,000 to 86,000 for a mid-sized company, including OCR, a three-level workflow and accounting integration. Maintenance and hosting run about SGD 8,700 per year.
How long does it take to build?
A project of this kind ships in about 3 months: 3 weeks of scoping, 8 weeks of development and 2 weeks of testing with approvers. A pilot with a 30-person department is recommended before full rollout.
Is receipt OCR reliable?
Current engines correctly read 90 to 95% of standard receipts. The remaining 5 to 10% are corrected by the employee before submission, which is still far faster than manual entry.
Are digital receipts accepted for tax purposes?
Yes, IRAS accepts electronic records provided they are accurate, complete and retained for at least 5 years. These requirements are built into the specification from day one.
Can we migrate from Expensify or Spendesk without losing history?
Yes, CSV exports from these tools let you import 2 to 5 years of history. Migration usually adds SGD 2,900 to 5,800 to the budget.
Let's scope your project. Send us your monthly claim volume, approval levels and accounting system for a precise estimate between SGD 43,000 and 86,000 and a 3-month delivery plan. 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.
