From Payslips in Excel to a SaaS Used by Many Companies
An illustration of an HR & payroll SaaS product for small-to-medium companies that need an attendance, leave, and payroll system in one subscription.
This is an illustrative concept, not a real client project — the data and results shown are examples to demonstrate what we can build.
Every company calculates salaries its own way. Tax & social security rules easily end up applied inconsistently.
When every company manages attendance, leave, and payroll in its own Excel file, it's difficult to build a single product that many companies can subscribe to with consistent compliance rules.
| Company | Employees | Payroll Status |
|---|---|---|
| PT Maju Bersama | 140 | Automated |
| CV Karya Utama | 64 | Manual Excel |
| PT Sinar Abadi | 210 | Automated |
| PT Cipta Mandiri | 98 | Partially Manual |
It's not a lack of companies that need a system. It's that each calculates on its own.
Payroll calculated manually in Excel
Salary, deduction, and allowance calculations are redone manually every period, prone to errors.
Tax & social security rules applied inconsistently
Without a unified system, every company can misapply the same compliance rules.
Hard to scale to other companies
Adding a new company means building a payroll template from scratch again.
One product, subscribed to by many companies at once.
Each company gets its own workspace (multi-tenant), but runs on the same underlying system.
Company Signs Up
A new company signs up and gets its own workspace (tenant).
Employee & Rule Setup
Employee data, salary components, and tax/social security rules are entered into the system.
Daily Operations
Attendance and leave requests are managed through one system.
Automatic Payroll
Salary calculated automatically from attendance, salary components, and compliance rules.
New Company
Other companies can onboard through the same process.
Example: a SaaS with 12 subscribing companies.
An illustrative scenario based on common patterns at small-to-medium companies that each still calculate payroll manually. The figures below are examples to illustrate the system, not a claim of client results.
Multi-tenant SaaS for HR & payroll
12 independent companies want the same attendance and payroll system, but their data must stay separate between companies. Each needs its own salary rules and compliance.
- How does each company's data stay separate and secure?
- How can a new company onboard quickly?
- How is payroll calculated automatically per company's rules?
Illustrated automation architecture
EXCEPTION → an employee's salary component changes mid-period → payroll is automatically recalculated
- 12
- Example Companies
- 1
- Codebase
- 0
- Manual Calculation
subscribing on one platform
used by all companies (multi-tenant)
for companies already on the system
The key change is how these companies manage payroll at the same time.
Before / Excel per company
- Each company calculates payroll manually in Excel
- Tax & social security rules applied inconsistently
- New company onboarding built from scratch
- Hard to see the picture across companies
- Compliance rule updates rolled out one at a time
After / one multi-tenant SaaS
- All companies use the same system
- Payroll calculated automatically per rules
- New companies onboard within days
- Compliance is consistent across all tenants
- Rule updates apply automatically to all companies
Not just a salary calculator.
This product can be developed gradually as more companies join.
Multi-tenant platform
One product usable by many companies with data kept securely separate.
Attendance & leave management
Employee attendance and leave requests in one system per company.
Automatic payroll & compliance
Salary calculated automatically according to applicable tax and social security rules.
From Excel per company to one SaaS, step by step.
- 01DISCOVERY
Map cross-company needs
Identify the processes common to all companies (attendance, leave, payroll) as the product baseline.
- 02FOUNDATION
Build the multi-tenant architecture
A data structure that keeps each company securely separate within one system.
- 03CORE PRODUCT
Build the core module
Attendance, leave, and salary components as the product's core feature.
- 04AUTOMATION
Automate payroll & compliance
Salary calculated automatically per each company's tax and social security rules.
- 05OPTIONAL
Add further layers
If needed, a reimbursement module or bank payroll account integration can be added.