The 'Might Need It Someday' Pile: A Decision Rule, Not a Feeling

“I might need it someday” is the single hardest phrase in decluttering, and it isn’t because the people who say it are wrong. It’s because the phrase is unfalsifiable. Almost anything might be needed someday, by some version of your future life you can’t fully predict, which means the phrase alone can justify keeping literally everything you own. The way out isn’t a stronger feeling in the other direction, and it isn’t trying to talk yourself out of caring about the item either — it’s replacing the feeling with a decision rule that actually has moving parts you can weigh one at a time.

Why “someday” resists every other test

Most decluttering questions have a natural answer once you ask them honestly: when did you last use this, would you buy it again. “Might need it someday” dodges both, because it explicitly lives in a future you haven’t reached yet — there’s no past use to check and no present desire to weigh, just a hypothetical need that could arrive at any unspecified point. That’s precisely why it needs a different kind of test: not “will I need this,” which is unanswerable, but “if that hypothetical need arrives, how bad is it really to not already have this on hand.”

The missing factor is replaceability

That’s the piece most “someday” reasoning skips entirely: how hard would this actually be to replace if the someday arrives? An item that’s cheap, common, and available within a day of needing it is a very different proposition from one that’s rare, expensive, or would take weeks to source again. Scoring usage, joy, replacement difficulty, and space cost separately — the way the Declutter Decision Calculator does — forces replaceability into the decision explicitly, rather than letting a vague sense of “better safe than sorry” stand in for it unchallenged.

Worked example: the camping gear

Take a tent and stove used once, six years ago, for a trip that hasn’t been repeated since. Rate it honestly: usage at zero (not touched in over a year, let alone six), joy at one (no real attachment, it’s equipment), replacement difficulty at two (camping gear is common and easy to rent or rebuy), and space cost at four (it’s bulky and occupies a real shelf). Run that through the scoring and it comes out at 16 out of 100 — a clear let-go. The “someday” camping trip isn’t impossible, but the gear is neither loved nor hard to replace, and it’s taking up space in the meantime for a maybe that hasn’t materialised in six years.

Worked example: the specialty tool

Now compare a genuinely specialised tool — something used rarely, but for a specific, recurring task with no easy substitute, and expensive or slow to source again if you let it go. Usage at one (rare, but real), joy at two (functional, not sentimental), replacement difficulty at five (genuinely hard or costly to replace), space cost at two (modest). That scores 47 — a “maybe,” not a clear keep or a clear let-go, and that’s the honest answer here. High replacement difficulty pulled real weight toward keeping it, in a way the camping gear’s easy replaceability never earned. The tool deserves a second look and a specific plan — when would you realistically need it again — rather than an automatic release.

Worked example: the box of unlabelled cables

Contrast both of those with the classic junk-drawer case: a box of cables and chargers of unknown origin, for devices you can’t immediately identify. Usage at zero, joy at zero (there’s no attachment to a cable), replacement difficulty at zero (a replacement cable is cheap and available same-day almost anywhere), space cost at two. That scores just 11 — about as clear a let-go as this scoring system produces. This is “might need it someday” at its weakest: no attachment, trivial replacement cost, and a “someday” that would cost you a few dollars and a short wait even if it arrived.

Worked example: spare parts for something you still own

One more case worth running, because it surprises people: spare parts for an appliance you still actively own and use. It feels responsible to keep them. Score it honestly, though — usage at zero (the parts themselves aren’t used unless something breaks), joy at zero, replacement difficulty at four (genuinely hard to find for an older model), space cost at one (small parts, little room). That comes out at 29 — still a let-go, even with a meaningfully high replacement-difficulty score. The lesson: high replacement difficulty alone doesn’t automatically save an item. It has to be weighed against genuinely low usage and low space cost, and here the balance still tips toward releasing it, however reasonable-sounding the original justification was.

Someday items come in recognisable types

Most “someday” items fall into a small number of recurring types, and it helps to recognise which one you’re looking at. There’s equipment for a hobby or activity you might return to — the camping gear above is this type, and the honest question is how likely the return actually is, not how nice it would be if it happened. There’s the specialised or hard-to-source tool, where replacement difficulty genuinely earns its weight. There’s the generic, cheap, easily replaced item — cables, containers, packaging — kept out of pure inertia rather than any real reasoning. And there’s the parts-and-spares category, kept out of a sense of responsibility that, as the worked example above shows, doesn’t always survive contact with the actual numbers. Sorting a pile by these types before scoring individual items usually speeds up the whole process, because entire types tend to score similarly.

Setting a someday deadline that actually works

For items that score as a genuine “maybe” rather than a clean keep or let-go — the specialty tool above is a good example — a fixed deadline does more good than an open-ended reprieve. Write down a specific trigger: if I haven’t needed this by a certain date, or after a specific upcoming event has passed, it goes. An open “I’ll decide later” rarely gets revisited on its own; a dated one gives you a concrete moment to check whether the someday you were waiting for ever actually arrived, and to act on the answer either way.

When “someday” piles up into something else

Everything above is about ordinary, occasional hesitation over specific items, which is completely normal and exactly what a decision framework like this is built for. It’s worth being clear, though, about where this framework stops being the right tool. If “might need it someday” reasoning applies to nearly everything in a home, if letting go of almost any item — regardless of its actual value or replaceability — causes real distress, or if the accumulation has made rooms unusable, that pattern is describing something different from ordinary indecision: hoarding disorder, a recognised mental health condition. No scoring system, checklist, or calculator is a treatment for that, and it would be irresponsible to suggest one is. If that description sounds familiar, for yourself or someone you care about, the right next step is talking to a doctor or mental health professional, not scoring more items. We go into this in a bit more depth in how to start decluttering, but the short version is the same here: this is a health matter, not a tidiness one, and it deserves to be treated that way.

A practical alternative: the borrow-or-rent test

For genuine “someday” items that don’t score high enough to keep, ask one more concrete question before you let go: if the someday arrives, could you borrow, rent, or quickly source a replacement instead of owning one continuously in the meantime? For most low-and-moderate replacement-difficulty items, the answer is yes, and it reframes the decision from “give this up forever” to “stop paying the ongoing cost of storing this for a need that may never arrive, knowing a reasonable fallback exists if it does.” That reframing tends to make the honest let-go decisions considerably easier to actually act on.

It’s worth applying the same test to future purchases, too, not just to what’s already in the house. Before buying something specifically for a hypothetical future use, ask whether you could just as easily borrow or source it if that use actually materialises. Plenty of “might need it someday” purchases are avoidable in the first place, which is a cheaper and simpler fix than scoring your way out of them years later.

The next time something in your “someday” pile won’t resolve on its own, score it honestly across all four factors in the Declutter Decision Calculator — particularly replaceability, the factor “might need it” reasoning tends to skip.