Budgeting

True Cost & Opportunity Cost of a Purchase

A purchase can be worth making and still have a meaningful opportunity cost. This tool is designed to make the trade-off visible without pretending that every pound should always be invested.

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Purchase and finance

Enter the actual cash price and borrowing structure.

£
£
%
months
£/hour
Optional perspective on work time.

Alternative scenario

Model what the same starting amount could become.

years
%
%

Your estimate

Use the result as a planning guide and change inputs to test the assumptions that matter most.

How this calculator works

If you finance part of the purchase, the calculator estimates a standard fixed repayment. It also compounds the purchase price at an alternative return assumption and converts the financed cash outflow into work hours using your net hourly figure.

How to use it

  1. Enter the price and cash paid upfront.
  2. Add APR and finance term if borrowing.
  3. Choose a horizon and alternative return assumption.
  4. Add a net hourly earnings estimate if you want the work-time view.
  5. Use the result as a pause-and-compare exercise, not as a judgement on the purchase.

Assumptions and limitations

The opportunity-cost value is hypothetical. Investment returns can be negative, inflation varies and the purchase itself may provide utility, income or resale value not modelled here.