Buy, Rent, or Borrow? The Honest Math on Which Tools Are Worth Your Money
Photo: Alan Murray-Rust, CC BY-SA 2.0, via Wikimedia Commons
Here's a scenario that probably sounds familiar: you're standing in the tool aisle at your local home improvement store, convincing yourself that a $400 compound miter saw is basically an investment. You're going to use it constantly. It'll pay for itself in no time. Right?
Maybe. Or maybe it'll sit in your garage for three years, slowly gathering sawdust and regret.
The truth is, tool buying decisions are some of the sneakiest budget-killers in the DIY world. Unlike a bad paint color or a lopsided shelf, a rarely-used tool just quietly drains your wallet every time you walk past it. So before you swipe that card, let's talk about how to actually figure out whether a tool is worth buying — or whether renting, borrowing, or hiring out is the smarter play.
Start With the Cost-Per-Use Calculation
This is the number that changes everything. Take the purchase price of a tool and divide it by how many times you realistically expect to use it over the next few years. That's your cost-per-use.
A $50 cordless drill used on 50 projects? One dollar per use. Totally worth it. A $300 tile wet saw you'll use once for a bathroom floor? That's $300 per use — which is wild when you can rent the same saw from Home Depot or Lowe's for around $50 a day.
The magic threshold most experienced DIYers use is somewhere around $5–$10 per use. If you can get below that with a purchase, buying usually makes sense. If you're way above it, renting is almost always the financially sound move.
Tools That Almost Always Make Sense to Buy
Some tools are so versatile and so frequently needed that owning them is a no-brainer. These are your everyday workhorses — the kind of gear you'll reach for on a dozen different projects throughout the year.
Cordless drill/driver combo: This is the Swiss Army knife of home improvement. Hanging pictures, assembling furniture, building shelves, installing fixtures — you'll use this thing constantly. A quality mid-range option from Milwaukee, DeWalt, or Ryobi runs $100–$200 and will serve you for years. Buy it.
Circular saw: If you do any framing, decking, or general cutting work, a circular saw pays for itself fast. You're looking at $60–$150 for a solid model, and it's useful across a massive range of projects.
Random orbital sander: Refinishing furniture, prepping surfaces for paint, smoothing out rough wood — this tool earns its $40–$80 price tag pretty quickly if you do any finish work at all.
Utility knife, tape measure, level: These are so affordable and so universally necessary that there's really no conversation to be had. Just own them.
Stud finder: At $20–$40, this is one of those purchases that prevents expensive mistakes. Worth every penny.
Tools That Are Almost Always Better to Rent
On the flip side, there's a whole category of tools that are genuinely useful — just not useful often enough to justify buying them outright.
Tile wet saw: Unless you're a serial bathroom renovator, this is a rent-it situation every time. Rental is typically $45–$75 per day, and that's a fraction of the $200–$600 purchase price.
Power auger or drain snake: You might need this once every few years. Rent it. Same goes for a pipe threading machine.
Floor sander: Refinishing hardwood floors is a weekend project, not a recurring hobby for most homeowners. Rent the drum sander and the edge sander, knock it out, and return them. Renting typically costs $60–$100 per day — far less than buying equipment that'll sit idle.
Pressure washer: This one's debatable, but for most homeowners who wash the driveway and siding once a year, renting at $40–$80 a day makes more financial sense than storing a $300+ machine that needs annual maintenance.
Scaffolding or extension ladders (heavy-duty): For a one-time exterior painting project or roof repair, renting scaffolding is the smarter, safer, and cheaper option.
Don't Overlook the Borrowing Option
American neighborhoods are full of underused tools sitting in garages. Before you buy or rent, ask around. A neighbor, a family member, or even a local community tool library (yes, those exist — cities like Oakland, Portland, and Denver have them) might have exactly what you need.
Borrowing works best for:
- Specialty tools you need for a single afternoon
- Items where wear and tear won't be significant
- Situations where you're genuinely unsure if a tool is right for the job
Just be a good borrower. Return things clean, on time, and in the same condition you got them. And if a tool gets damaged on your watch, offer to repair or replace it. That's how you keep the borrowing pipeline open for next time.
The Storage Reality Check
Here's something tool-aisle enthusiasm tends to make you forget: tools take up space, and space costs money. A garage full of rarely-used equipment is a garage that can't fit your car, your bikes, or the things you actually need to access regularly.
Before buying any tool, ask yourself honestly: where is this going to live? If the answer is "I'll figure it out," that's a yellow flag. Factor in storage when you run your cost-per-use math. A tool that costs $200 to buy but also requires a dedicated wall mount, a case, and a reorganization of your entire garage has a higher true cost than the sticker price suggests.
What About Resale Value?
Quality tools from trusted brands do hold their value reasonably well — especially cordless tools in popular battery ecosystems (DeWalt 20V MAX, Milwaukee M18, Ryobi ONE+). If you buy into one of these ecosystems, you're building a battery-compatible collection where one charger and a few battery packs serve multiple tools. That's genuinely efficient.
But don't count on resale value as a justification for buying something you won't use much. A lightly used tile saw might sell for 40–60% of its original price on Facebook Marketplace — but only if you actually sell it, which requires time and effort most people never get around to.
A Simple Decision Framework
When you're standing in that tool aisle (or scrolling through Amazon at midnight), run through these four questions:
- How many times will I realistically use this in the next three years?
- What's my cost-per-use if I buy vs. rent?
- Do I have a place to store it properly?
- Could I borrow one from someone I know?
If buying wins on cost-per-use, you have storage sorted, and borrowing isn't a realistic option — buy it. Otherwise, rent or borrow and put that money toward something that'll actually improve your home.
The best DIYers aren't the ones with the biggest tool collections. They're the ones who spend their money where it actually matters and know exactly when to reach for their own gear versus someone else's.
