ROI Calculator

Start simple, then refine. Every figure updates instantly and every formula is documented.

Initial investment

€

Expected benefit (per year)

€

Recurring costs (per year)

€

Time period

years

ROI

361.3%

Net benefit ÷ total cost

NPV (3y)

€241,212

At 8% discount

IRR

219.0%

Annualised return

Payback period

5 months

Discounted payback

6 months

Cash flow overview

Value over time (cumulative NPV)

Top value drivers (±20% sensitivity on NPV)

Expected benefit-26% / +26%
Recurring cost-2% / +2%
Initial investment-4% / +4%
Discount rate-10% / +12%
Ramp-up delay-24% / +0%

Scenarios (NPV)

Upside case	€323,035	25%
Base case	€241,212	55%
Downside case	€122,321	20%

Expected NPV (weighted)€237,889

How this was calculated

Total benefit of €369,000 over 3 year(s) less total cost of €80,000 gives a net benefit of €289,000. NPV discounts each yearly net flow at 8% per year; IRR is the discount rate at which NPV equals zero. Payback is interpolated linearly within the year the cumulative cash flow turns positive.