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ENExplore Calculators

Cloud ROI Calculator

Turn cloud benefits and costs into ROI, net present value at your discount rate and a payback period in months.

About Cloud ROI Calculator

ROI is the undiscounted ratio of net benefit to total cost, which is easy to quote but ignores the timing of money. NPV fixes that by discounting each year's net benefit back to today at your hurdle rate, so a benefit promised in year three counts for less than the same benefit next year, and a positive NPV means the case clears the hurdle. Finance approves cloud programmes on NPV and payback, not on percentage savings, and a case that shows ROI without a discount rate is usually challenged on day one. These are planning estimates built from your own assumptions and are not financial advice — have your finance team confirm the discount rate and the benefit definitions.

Formula

Cloud ROI

ROI = (total benefit − total cost) ÷ total cost; NPV = Σ (annual net benefit ÷ (1 + r)^t) − up-front investment; payback months = up-front investment ÷ annual net benefit × 12.

r
Discount rate, normally the weighted average cost of capital
t
Year index from 1 to the appraisal horizon
annual net benefit
Annual benefit minus the annual cloud run cost

Worked example

With the default values below, Cloud ROI Calculator returns Return on Investment of 22.2%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Annual benefit realisedaccepts 0–500,000,000 USD/year
1,450,000 USD/year
Annual cloud run costaccepts 0–500,000,000 USD/year
980,000 USD/year
Up-front investmentaccepts 0–500,000,000 USD
620,000 USD
Appraisal horizonaccepts 1–10 years
3 years
Discount rateaccepts 0–40 %
10 %

Results

Return on Investment
22.2%
Net Present Value
$548,820.44
Payback Period
15.8 months
Undiscounted Net Benefit
$790,000.00
Total Benefit over the Horizon
$4,350,000.00
Total Cost over the Horizon
$3,560,000.00
Business Case Verdict
Positive net present value inside the horizon

Step by step

  1. 1Values used
  2. 2Cloud ROI
  3. 3Return on Investment= 22.2
  4. 4Net Present Value= 548,820.44
  5. 5Payback Period= 15.8 months
  6. 6Undiscounted Net Benefit= 790,000.00
  7. 7Total Benefit over the Horizon= 4,350,000.00
  8. 8Total Cost over the Horizon= 3,560,000.00

Assumptions and limits

  • The result is derived only from the 5 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation or tax into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Cloud ROI calculated?

ROI = (total benefit − total cost) ÷ total cost; NPV = Σ (annual net benefit ÷ (1 + r)^t) − up-front investment; payback months = up-front investment ÷ annual net benefit × 12. ROI is the undiscounted ratio of net benefit to total cost, which is easy to quote but ignores the timing of money. NPV fixes that by discounting each year's net benefit back to today at your hurdle rate, so a benefit promised in year three counts for less than the same benefit next year, and a positive NPV means the case clears the hurdle.

Why does Cloud ROI matter?

Finance approves cloud programmes on NPV and payback, not on percentage savings, and a case that shows ROI without a discount rate is usually challenged on day one. These are planning estimates built from your own assumptions and are not financial advice — have your finance team confirm the discount rate and the benefit definitions.

What values do I need to enter?

This calculator takes 5 inputs: Annual benefit realised, Annual cloud run cost, Up-front investment, Appraisal horizon, Discount rate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

Why can ROI be positive while NPV is negative?

ROI treats every dollar as equal regardless of when it arrives. If most of the benefit lands in the final year of the horizon, discounting shrinks it enough that the up-front investment is never recovered in present-value terms, so NPV turns negative even though the raw totals look healthy.

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