Website ROI Calculator

What the website ROI calculator does

Every website, online store or internal tool is an investment, and this calculator helps you judge it like one. Enter the upfront project cost, the monthly running cost for hosting, licenses and maintenance, the new monthly revenue you expect and any monthly cost savings from time saved or tools replaced. It returns the net gain per month, the payback period in months, the total gain over your chosen horizon and the return on investment as a percentage.

A year-by-year table shows cumulative gain against the original investment, so you can see exactly when the line crosses from negative to positive. Choose a 12, 24 or 36 month horizon depending on how long you expect the asset to keep working before a major rebuild.

How to use it

1. Enter the one-time cost of the project. If you do not have a figure yet, run the project cost calculator first.
2. Add realistic monthly running costs: hosting, domain, email, plugins, support retainers.
3. Estimate the extra monthly revenue the project will bring. Be conservative and use the low end of your expectations.
4. Add monthly savings, such as staff hours no longer spent on manual work, then pick a horizon and read the results.

Run the numbers twice, once with optimistic assumptions and once with cautious ones. If the project still pays back within your horizon in the cautious case, it is a solid decision.

Why it matters

Website and app projects are often approved on gut feeling and then judged on gut feeling too, which makes it hard to defend the spend or to learn from it. Putting even rough numbers on expected revenue and savings forces useful questions: how many extra inquiries does the site need to generate, what is each one worth, and how many hours a week will the new system actually save?

The payback period is the number most decision makers care about. Under a year is excellent and common for business websites and simple internal tools. Inside two years is still a healthy business case, especially when the asset keeps producing after the horizon ends. Longer than that usually means the scope should be trimmed or the project split into phases, which is exactly the kind of conversation we have when scoping websites and management systems.

• Turn a vague idea into a payback period you can defend.
• See how running costs erode returns over time.
• Compare two project options on equal terms.