A low price is only a deal if the thing lasts as long as you need it. Before you buy the cheaper option, count what it will cost you over its life, including replacements, repairs, and your time. When the bargain costs more per year of use than the pricier option, it’s the expensive choice, whatever the price tag says.
That’s the math deal hunters skip. The savings show up at the register, and the costs show up later, one broken part or lost weekend at a time.
Say an $80 vacuum dies after two years and a $200 model runs for six. To cover those six years, you buy the cheap one three times for $240, against $200 for the machine that lasted. That’s $40 a year for the bargain and $33 for the better vacuum, before counting the trips to replace it.
Doing a job yourself instead of hiring it out follows the same math, with your hours as part of the price. Say a job would take your whole Saturday, about eight hours, and a handyman quotes $250 for the labor alone, so the materials cost the same either way. Doing it yourself saves the $250, about $31 for each hour of your Saturday, and only if it works the first time. In a 2024 survey of homeowners who had done DIY projects, home insurer Hippo found that 58% spent more than planned because of mistakes and 47% underestimated the time involved.
So before you buy, estimate how long each option will last. Check the warranty length, read reviews from owners who have had the product for a few years, and remember how long your last one held up. Then add what each option will cost to run and repair. For a DIY job, add your hours at what they’re worth to you, plus the cost of a professional redo if it goes wrong.
Divide each option’s total by the years you expect to use it, and buy the one with the lower number. The exception is something you’ll use once or briefly, like a tool for a single job. There, the lowest price is the lowest cost.
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