lifestyle · January 16, 2025 · 4 min read
The 10-20-30 Rule: A Simple Framework for Deciding What to Rent vs Buy
Instead of running the numbers separately for every gadget, here's a simple usage-based rule of thumb — the 10-20-30 framework — that tells you quickly whether renting or buying makes more sense for any given item.
By RentSmart Team
We get asked the rent-vs-buy question for all kinds of items, not just PS5. Rather than redo the math for every product, here's a rule of thumb we actually use ourselves when advising customers: the 10-20-30 rule.
The core idea:
Estimate what percentage of the year you'll realistically use the item, then apply this rule:
Under 10% usage → Always rent
If you'd use something fewer than about 35 days a year, renting wins by a wide margin almost every time, because the item would otherwise sit idle 90%+ of the year while still losing value. This covers most gaming consoles used casually, cameras for occasional projects, and seasonal adventure gear like sleeping bags or winter jackets.
10-20% usage → Usually rent, but check the specific numbers
Somewhere in the 35-70 days/year range, it's worth doing quick math on the specific item, since rental rates and purchase prices vary a lot. An iPad rented for a single college semester (4 months) still comes out well ahead of buying, for example, but the margin isn't always the 80%+ savings you'll see quoted for extreme cases.
20-30%+ usage → Buying starts to make more sense
Past roughly 100 days a year of genuine, regular use, ownership usually wins — you're using the item often enough that the per-use cost of owning it drops below what repeated rental would cost, and you avoid any availability constraints.
Where this rule doesn't apply well:
• If you're testing whether you'll actually use something before committing — rent regardless of expected usage %, since the goal is validation, not just cost minimization
• If it's a one-time need (a single event, a single trip) — always rent, since a purchase would be dead weight afterward
• If technology changes fast in that category (gaming consoles, VR headsets) — leaning toward rental keeps you on current hardware without upgrade costs
A quick worked example:
Say you're deciding on a DSLR camera. If you'd use it for maybe 15-20 days a year for personal projects, that's under 10% usage — rent it per-project. If you're a working photographer using it 150+ days a year, buying is clearly the better call; renting that often would cost more than ownership.
Not sure where your situation falls?
WhatsApp +91-9870577040 with the item and roughly how often you'd use it — we'll do the actual math for your specific case rather than a generic estimate, and tell you honestly if buying would serve you better.