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Procurement & VendorsGenerated accuracy model review: 2026-05-06
Seat-Based SaaS Cost Calculator accuracy and testing
This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.
Formula source
- Average seats = starting seats + expected added seats / 2. Total SaaS cost = average seats * monthly price per seat * term months * (1 - discount percent / 100) + monthly platform fee * term months + onboarding fee.
Test cases
Default input regression check
Generated from the checked-in default inputs and calculate function.
Inputs
- Starting Seats: 120
- Expected Added Seats: 30
- Monthly Price per Seat: 38 $/seat
- Contract Term: 24 months
- Discount: 8%
- Monthly Platform Fee: 500 $/mo
- Onboarding Fee: $7,500
Expected outputs
- Total SaaS Cost: $132,770.40
- Average Seats: 135
- Discounted Seat Cost: $113,270.40
- Average Monthly Cost: $5,532.10
Known limitations
- This is a planning tool, not legal, accounting, sourcing, or tax advice. It does not interpret vendor terms, service levels, or contract risk.
Assumptions
- All pricing, discounts, fees, and contract values are entered by the user.
- Taxes, foreign exchange, service credits, legal terms, and non-price concessions are not inferred.
- Inputs are processed locally in the browser and are not stored by this calculator.
Unit handling
- Starting Seats accepts numeric values.
- Expected Added Seats accepts numeric values.
- Monthly Price per Seat accepts values in $/seat.
- Contract Term accepts values in months.
- Discount accepts values in %.
- Monthly Platform Fee accepts values in $/mo.
- Onboarding Fee accepts values in $.
- Total SaaS Cost is displayed as currency.
- Discounted Seat Cost is displayed as currency.
- Average Monthly Cost is displayed as currency.
Rounding rules
- Number displays use up to 2 decimal places in the calculator UI.
- Currency outputs are displayed with standard US dollar formatting.
- Input precision follows configured step values where provided.
Version history
1.0.0 - 2026-05-06
Generated accuracy and testing page from the current seat-based-saas-cost-calculator calculator definition.
Change log
2026-05-06
Published default regression test documentation and metadata fallbacks for Seat-Based SaaS Cost Calculator.
Calculator transparency
Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.