Build a zero trust investment case by comparing annual expected loss avoided and operating savings with implementation and recurring costs. See first-year ROI, three-year net value, annual net benefit, and the payback period under your own assumptions.
The main result compares first-year modeled benefit with all first-year program costs.
Do not treat compliance necessity or strategic resilience as zero merely because they are difficult to monetize; assess them separately.
With $2.5M baseline loss, 50% reduction, $900,000 setup, $420,000 annual cost, and $160,000 savings: first-year ROI is about 6.82%, with $990,000 recurring annual net benefit.
Yes, if retirement is committed, timing is realistic, and those savings are not counted elsewhere.
It is charged once; recurring cost and annual benefits continue in the three-year calculation.
Payback is not reached because ongoing benefits do not exceed ongoing cost.
Yes. Compliance, contractual, resilience, or strategic requirements may justify action beyond modeled financial return.
No. It is a simple three-year model without discounting; use a discounted cash-flow analysis for longer horizons.
| Variable | Meaning | Unit |
|---|---|---|
| Baseline loss | Expected annual loss before the program | USD/year |
| Reduction | Expected loss avoided by zero trust | % |
| Implementation | One-time technology and change cost | USD |
| Recurring cost | Annual licenses, operations, and support | USD/year |
| Operating savings | Annual efficiency or consolidation savings | USD/year |