I used to think I was pretty good with money. I hunted for sales, bought the “good enough” version, and avoided anything that felt like a splurge. But I kept noticing a weird pattern: my home (and my closet, and my kitchen drawers) filled up with low-cost stuff I didn’t love, didn’t use, or had to replace—while the few pricier things I owned tended to earn their keep.
So I tried a simple experiment: I started dividing the price of a purchase by how many times we would realistically use it. Not aspirational use. Not “this will motivate me.” Real use based on our routines, the season, the space we have, and how we actually behave. It changed my spending habits almost immediately. Some “cheap” buys suddenly looked expensive, and one splurge I’d been avoiding started to look like the most reasonable option.
The simple math that changed my shopping
The idea is straightforward: estimated cost per use. You take the price and divide it by the number of times you expect to use it within a timeframe that makes sense—often a year, sometimes the life of the item.
Cost per use = total cost ÷ realistic number of uses
If something costs $60 and you’ll use it 60 times, it’s $1 per use. If something costs $15 but you’ll only use it 3 times, it’s $5 per use. That’s the first shift: the price tag stops being the main event. The “value per use” takes center stage.
I also learned quickly that “realistic” is doing a lot of work. It’s easy to tell yourself you’ll use a waffle maker every weekend or that you’ll wear a certain color because you love it in theory. The exercise only works if you’re honest about your habits.
How I estimate “realistic” use (without overthinking it)
I keep it practical. When I’m considering a purchase, I ask a handful of questions:
1) What’s the existing pattern?
If I’m buying something for a new hobby, do I already maintain similar habits? If I don’t currently meal prep, will a new set of containers truly change that?
2) How often will I reach for it compared to what I already own?
If I have three jackets and I’m eyeing a fourth, which one gets worn less? What will be displaced?
3) What are the friction points?
Is it annoying to clean, store, charge, or maintain? Friction reduces use, even when the item is technically useful.
4) Is this seasonal or occasion-based?
Holiday decor, special-occasion outfits, camping gear—these can be great purchases, but only if the use estimate reflects reality.
5) What’s the replacement cycle?
Some low-cost items wear out quickly. If I’m likely to buy the same thing multiple times, I factor that in as a higher “real” cost.
To keep myself honest, I usually estimate on the conservative side. If I’m wrong, I’d rather be pleasantly surprised than stuck with clutter and regret.
Where “cheap” started looking expensive
Once I began doing this calculation, I noticed several categories where I was basically paying a premium for good intentions—or for the illusion of saving money.
1) The impulse “deal” that doesn’t fit my real life
You know the kind: the sale rack find, the cute gadget at the endcap, the “limited-time” discount that makes you feel clever. The price is low enough that it seems harmless. But if you only use it once or twice, it becomes one of the most expensive things you own—on a per-use basis.
I found that my biggest risk factor wasn’t the cost; it was the excitement. If I’m buying something because it feels fun or validating in the moment, I’m more likely to overestimate how often I’ll use it.
Now, when a “deal” tempts me, I do one quick check: “Where will this live, and when will I use it next?” If I can’t answer without searching for a made-up scenario, the cost per use is probably going to be awful.
2) Cheap versions of things I use constantly
This was a hard one because it’s where the “I’m being responsible” story really takes hold. If I need something, why not buy the cheaper version?
The problem is that the cheap version often comes with hidden costs: it breaks, it performs poorly, it’s uncomfortable, it creates extra work, or it subtly annoys you so much you avoid using it. Suddenly, your cost per use climbs because the item doesn’t last or doesn’t get used as expected.
It’s not that every inexpensive item is bad. It’s that for the things you use all the time, small differences matter more. Durability, ease, comfort, and reliability directly affect how often you’ll reach for it—and whether you’ll need to replace it earlier than you thought.
3) “Just in case” purchases
These can be emotionally soothing. Buying a backup phone charger, an extra kitchen tool, a spare jacket “for emergencies” can feel like preparation and prudence. Sometimes it is. Often it’s just clutter disguised as security.
The cost-per-use test makes “just in case” items face a harsh reality: if they sit unused for years, their cost per use is effectively infinite until they finally get used. And by then, they might be lost, expired, outdated, or not what you need anymore.
When I truly need an emergency item, I try to choose something that can also serve a regular purpose. That way the uses add up—and the purchase doesn’t rely on a hypothetical crisis to become “worth it.”
4) Trendy items that don’t match my habits
I don’t have to name any specific trend to know you’ve seen this happen: something gets popular, it looks convenient, and it seems like everyone uses it constantly. But your lifestyle isn’t everyone else’s. If a product doesn’t fit how you already live, you have to be honest that you’re also buying the labor of building a new habit.
That doesn’t mean you shouldn’t ever try new things. It just means the cost per use should be calculated with extra caution. New habit = lower initial use. If you want to experiment, consider borrowing, renting, buying used, or choosing a version that won’t hurt if it becomes a short-lived phase.
When a splurge suddenly made sense
Here’s what surprised me most: this method didn’t only talk me out of buying stuff. It also gave me permission to buy certain higher-quality things—because the math supported it.
The splurge that started making sense was spending more on an item I would use nearly every day and that directly reduced friction in my routine. In that category, the cost per use gets low quickly. Even a “big” price tag can become reasonable when the item is used frequently, holds up over time, and makes daily life easier.
For me, the turning point wasn’t luxury for luxury’s sake. It was choosing quality in a high-use category where the cheaper version had already proven to be a false economy—either because it wore out, didn’t perform well, or just made the task more annoying than it needed to be.
If you’re trying to identify your own “smart splurge,” look for purchases that meet most of these conditions:
• High frequency of use (daily or multiple times per week)
• High impact on comfort, time, or stress
• Low likelihood that your needs will change soon
• Durable enough to last meaningfully longer than cheaper options
• A proven pain point (you’ve struggled with the cheap version already)
In other words: if it’s something you’ll use a lot and it makes life smoother, it’s often a better investment than a string of small “savings” that keep disappointing you.
Cost per use isn’t the only number that matters
The cost-per-use approach is powerful, but it has limits. I had to add a few guardrails so it didn’t become a justification tool (because yes, you can talk yourself into anything with the right spreadsheet).
Budget still comes first. A low cost per use doesn’t matter if the purchase creates credit card debt you can’t pay off. If the money isn’t there, the math is irrelevant.
Some purchases don’t “pay off” in uses. Gifts, donations, certain experiences, and some convenience purchases may not fit neatly into this framework—and that’s fine. Not everything has to be optimized.
Maintenance counts. If something requires special refills, subscriptions, expensive accessories, or lots of cleaning time, I factor that into “total cost” mentally. A product that’s cheap to buy but annoying or costly to maintain will get used less, and the per-use cost rises.
Space has value. Storage isn’t free. If an item takes up meaningful space, that’s a cost too—especially in small homes. Clutter also creates friction, which lowers use across the board.
A simple way to apply this before you buy
If you want to try this without turning every shopping decision into homework, here’s a quick process that worked for me.
Step 1: Decide a realistic time window.
For many items, a year is a good benchmark. For durable goods, you might estimate 3–5 years, but only if you know you’ll actually keep and use it that long.
Step 2: Estimate the number of uses.
Be conservative. If you’re unsure, halve your first guess.
Step 3: Divide.
You’ll get a rough cost per use. It doesn’t need to be perfect—this is about clarity, not accounting.
Step 4: Compare alternatives.
Compare with something you already own, a cheaper option, a more expensive option, or a used version. Sometimes the most “reasonable” option isn’t the cheapest; it’s the one that keeps the cost per use low without adding hassle.
Step 5: Add one reality check.
Ask: “If I don’t buy this, what happens?” If the answer is “nothing,” it’s probably not urgent. If the answer is “I keep wasting time/money/effort on a workaround,” it may be worth prioritizing.
The surprising emotional benefit: less guilt, fewer regrets
I expected this method to make me more disciplined. I didn’t expect it to make me feel calmer.
When I buy something now, I feel more confident that it will earn its place in our home. I’m less tempted by random deals because the “savings” don’t look like savings once I’m honest about usage. And when I choose to spend more, I don’t feel like I’m being irresponsible—I feel like I’m making a deliberate choice based on how we actually live.
It also changed how I think about decluttering. If I’m holding onto something because I paid for it, I can flip the question: “How many uses have I gotten so far?” If the answer is “almost none,” the money is already spent. Keeping it doesn’t recoup the cost. It just keeps taking up space and attention.
Small prompts that keep me honest
These are the little questions I’ve started asking in real time, especially when I’m shopping online:
• Will I use this at least once a week?
If not, I slow down and consider borrowing, buying used, or waiting.
• What will I stop using if I buy this?
If nothing gets replaced, it’s likely to become clutter.
• How many times did I use the last version of this?
Past behavior is a better predictor than hope.
• Is the cheap option cheaper if I replace it twice?
Sometimes the “budget” option is only cheaper if it lasts—which it often doesn’t.
• Would I still want this if it weren’t on sale?
If the discount is the main reason, the per-use cost is probably heading in the wrong direction.
The takeaway
Dividing purchases by realistic use sounds almost too simple, but it cuts through a lot of marketing noise and a lot of mental storytelling. It highlights the difference between buying something because it’s inexpensive and buying something because it’s valuable.
Some “cheap” purchases are only cheap at the register. If they barely get used, wear out quickly, or create friction, they can be expensive in the ways that matter: wasted money, wasted space, and the low-grade frustration of owning things that don’t really help.
And some splurges aren’t indulgences—they’re practical choices when the item gets used constantly and improves your day-to-day life. Once you start thinking in cost per use, it becomes easier to spend less on what doesn’t matter and more on what genuinely does.
The next time you’re about to hit “buy,” try the division. You might be surprised which purchases get cheaper—and which “bargains” suddenly aren’t.