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Profitability Index Calculator.

Calculate profitability index from present value and investment.

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Profitability index: 1.5

Profitability index

1.5000

FAQs

How does the profitability index calculator work?

Enter the requested values to receive a deterministic result. No live market, tax, or jurisdiction data is inferred.

Cite this calculator

Canonical URL: https://mathify.one/fr/finance/profitability-index

Cite as: Mathify. (2026). Calculatrice: Profitability Index. https://mathify.one/fr/finance/profitability-index

Use Cases

Project Investment Screening

Quickly compare multiple projects by their profitability index to prioritize those with the highest value per dollar invested.

Example: Compare a project with PI 1.5 vs. 1.2; the first is more attractive.

Capital Budgeting Decisions

Use the PI to decide whether to accept or reject a single project based on whether the index exceeds 1.

Example: If PI is 0.95, reject the project as it may not recover costs.

Frequently Asked Questions

What does the profitability index tell you?
The profitability index (PI) measures the ratio of the present value of future cash inflows to the initial investment. A PI greater than 1 indicates a potentially profitable project, while a PI less than 1 suggests it may not cover costs.
How is the profitability index calculated?
Simply divide the present value of future inflows by the initial investment. For example, if the present value of inflows is $120,000 and the initial investment is $100,000, the PI is 1.2.
What is a good profitability index?
Generally, a PI of 1 or higher is considered acceptable, as it means the project generates at least as much value as it costs. A PI above 1 indicates a positive net present value.

Tips & Common Mistakes

Tips

  • Ensure the present value of inflows is calculated using an appropriate discount rate that reflects the project's risk.
  • Use the profitability index alongside net present value (NPV) for a more comprehensive analysis.
  • When comparing projects of different sizes, PI helps normalize the value per unit of investment.
  • Double-check that the initial investment includes all upfront costs, not just the purchase price.

Common Mistakes to Avoid

  • Using the nominal future cash flows instead of their present value, which overstates the PI.
  • Forgetting to include all initial investment costs, such as installation or working capital, leading to an inflated PI.
  • Comparing PIs of projects with different risk levels without adjusting the discount rate.

Last updated: August 13, 2026