Assume AUD1,000 setup, AUD600 monthly operating cost and AUD900 monthly financial benefit. These are invented planning inputs, not Yes AI prices, client results or local benchmarks. The benefit combines genuine avoided spending and incremental profit after delivery costs.
Over 12 months, benefit is AUD10,800 and total project cost is AUD8,200. Net benefit is AUD2,600. Simple ROI is (benefit minus cost) divided by cost, multiplied by 100: approximately 31.7%. Benefit divided by cost alone is a benefit-cost ratio, not net ROI.
The ongoing surplus is AUD300 per month. With steady benefits from the first month, simple setup payback is AUD1,000 divided by AUD300, or about 3.3 operating months. If benefits arrive more slowly, payback takes longer. If monthly benefit is AUD500 instead, ongoing cost exceeds benefit and this example has no payback.