Cost-Per-Use Analysis for Major Purchases

Cost-per-use analysis divides the total lifetime cost of a purchase — including acquisition price, maintenance, and disposal — by the number of times you realistically expect to use it, converting a sticker price into a per-use figure that reveals true value. A $300 jacket worn 150 times costs $2 per use; a $60 jacket worn four times costs $15 per use — flipping the intuitive sense of which was the better buy.

This framework is especially powerful for large discretionary purchases like appliances, fitness equipment, vehicles, or tools, where emotional or impulsive reasoning often overrides financial logic. AI can rapidly model multiple purchase scenarios, factor in alternatives like renting or buying used, and help you set honest usage estimates before you commit money.

How to apply it

Prompt ChatGPT: 'I'm considering buying a $1,200 treadmill. Help me do a cost-per-use analysis. Ask me the questions you need to estimate realistic usage, factor in a rough maintenance cost, and compare it to the cost of a gym membership at $45/month. Tell me at what usage frequency the treadmill becomes the better financial choice.' Let the AI guide the conversation and surface the break-even point before you swipe your card.