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ROI Calculator

Calculate net profit, ROI percentage, and optional annualized ROI from investment inputs.

Optional fees, taxes, operating costs, or other investment-related costs.

Optional. Add a period to estimate annualized ROI.

Status: initial

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Business analysis

Introduction

An ROI calculator measures return on investment by comparing net profit with the initial amount invested.

What is ROI?

ROI, or return on investment, is a percentage that shows how much profit or loss an investment produced relative to its starting cost.

ROI formula

The basic ROI formula divides net profit by initial investment and multiplies by 100. If an investment period is entered, annualized ROI estimates the average yearly growth rate.

Variables explained

Initial investment

The starting amount spent or invested.

Final value

The ending value, sale value, revenue, or proceeds.

Additional costs

Optional costs such as fees, taxes, ads, repairs, or operations.

Net profit

Final value minus initial investment and additional costs.

ROI

Net profit as a percentage of initial investment.

Annualized ROI

Estimated average yearly return when a period is provided.

ROI disclaimer

This calculator provides educational estimates only. It is not financial advice, investment advice, tax advice, or a guarantee of business or investment outcomes.

Formula guide

Net profit

Net Profit = Final Value - Initial Investment - Additional Costs

  • Additional costs are optional.
  • Net profit can be negative.

Net profit is the gain or loss after subtracting the original investment and entered costs.

ROI percentage

ROI = Net Profit / Initial Investment x 100

  • Initial investment must be greater than 0.

ROI compares net profit with the capital used to generate it.

Annualized ROI

Annualized ROI = ((Final Value / Initial Investment) ^ (1 / Years) - 1) x 100

  • Years can be entered directly or converted from months.

Annualized ROI estimates an average yearly return over the entered period.

Loss scenario

Negative ROI = Loss / Initial Investment x 100

  • Losses produce negative ROI values.

ROI can be below 0 when final value and costs are greater than the return.

Worked examples

Business example

  1. Initial investment is 10,000.
  2. Final value is 13,000.
  3. Additional costs are 500.
  4. Net profit is 2,500 and ROI is 25%.

Investment example

  1. Initial investment is 5,000.
  2. Final value is 6,000.
  3. No additional costs are entered.
  4. ROI is 20% before taxes or fees not entered.

Marketing ROI example

  1. Ad spend is the initial investment.
  2. Campaign revenue is the final value.
  3. Agency or tool costs can be additional costs.
  4. ROI shows campaign return relative to spend.

Real estate ROI example

  1. Purchase cost is the initial investment.
  2. Sale value is the final value.
  3. Repairs, fees, and taxes can be additional costs.
  4. ROI does not replace a full cash-flow model.

Common ROI mistakes

Ignoring additional costs

Fees, taxes, operations, repairs, and marketing costs can materially change ROI.

Confusing ROI with profit margin

ROI compares profit with investment; profit margin compares profit with revenue.

Comparing different time periods

A 20% ROI over one year is not the same as 20% over five years.

Treating ROI as a guarantee

Historical or estimated ROI does not guarantee future results.

Using annualized ROI without context

Annualized ROI smooths performance and may hide volatility or timing risk.

FAQs

What does ROI mean?
ROI means return on investment.
How is ROI calculated?
ROI is net profit divided by initial investment, multiplied by 100.
What is net profit?
Net profit is final value minus initial investment and additional costs.
Can ROI be negative?
Yes. ROI is negative when the investment produces a loss.
What is annualized ROI?
Annualized ROI estimates average yearly return over the entered investment period.
Is annualized ROI always required?
No. It is only calculated when an investment period is entered.
What are additional costs?
Additional costs can include fees, taxes, repairs, operating costs, or campaign costs.
What is ROI vs profit margin?
ROI compares profit with investment, while profit margin compares profit with revenue.
Does this include taxes?
Only if you enter taxes as additional costs.
Can this be used for marketing ROI?
Yes, if campaign spend, revenue, and additional costs are entered consistently.
Can this be used for real estate ROI?
Yes for a simple estimate, but full real estate analysis may require cash-flow modeling.
Is ROI financial advice?
No. This calculator is educational and does not provide financial advice.
Why can ROI and annualized ROI differ?
ROI is total return; annualized ROI accounts for the investment period.
What if final value is less than initial investment?
The calculator shows a loss and negative ROI.
Which related calculator should I use next?
Use Profit Margin Calculator for margin analysis or Compound Interest Calculator for growth over time.

References

Related calculators

Last updated and version history

Last updated: 2026-07-04

  • 1.0.0 (2026-07-04): Initial production release with net profit, ROI percentage, and optional annualized ROI.