Storage Unit Investment Calculator
Avoid: Cap rate below 6%
Buying a storage unit might sound like a weird way to make money - until you see the numbers. In 2025, the U.S. self-storage industry brought in over $42 billion in revenue. That’s not a typo. And it’s not just big corporations doing it. Thousands of regular people own single storage facilities and pull in $50,000 to $200,000 a year in profit - with almost no daily work. If you’re wondering whether buying storage units is a good investment, the answer isn’t a simple yes or no. It’s yes - if you know what you’re doing.
How storage units actually make money
Most people think storage units are just empty boxes you rent out. But they’re not. They’re high-margin, low-maintenance assets that work like vending machines for stuff people don’t know what to do with. You don’t need to clean them, fix them often, or even show up every day. Tenants pay monthly, usually automatically. Vacancy rates in the U.S. hover around 8-10%, which is incredibly low for real estate. Compare that to apartments, where vacancies can hit 15-20% in some cities.
Here’s how it breaks down: A single 10x20 unit in Texas rents for $140 a month. That’s $1,680 a year. Multiply that by 100 units, and you’re at $168,000 in gross income. After property taxes, insurance, maintenance, and management (which you can outsource for 5-10%), your net profit is often 50-60% of that. That’s better than most rental properties. And unlike apartments, you don’t deal with broken appliances, noisy neighbors, or evictions. People who store stuff? They’re quiet. They pay on time. And they rarely complain.
Where the real profits are
Not all storage units are created equal. Location is everything. A facility in a suburb of Phoenix with 200 units might earn $180,000 a year. The same facility in rural Nebraska? Maybe $60,000. Why? Because storage demand follows population density, moving trends, and housing costs. Cities with high rent, tight apartments, and lots of short-term residents - like Miami, Austin, or Seattle - have the highest occupancy and rental rates.
Also, newer facilities beat older ones. A facility built after 2015 has climate control, security cameras, online booking, and mobile payments. Tenants pay 20-30% more for those features. Older units? They’re harder to rent and cost more to upgrade. If you’re buying, aim for a facility built in the last 8 years. Avoid anything older than 2010 unless it’s in a prime location and priced way below market.
The hidden costs no one talks about
People see the profits and forget the catches. First, you need cash. Most lenders won’t finance storage units like they do houses. You’ll likely need 30-40% down. That means if a facility costs $1.5 million, you need $450,000 to $600,000 in cash upfront. Second, property taxes can be brutal. In Florida, for example, storage facilities pay 2-3% of value in taxes annually - more than residential rentals. Third, insurance isn’t cheap. You need coverage for theft, fire, flood, and liability. A $1 million facility might cost $8,000 a year just in insurance.
Then there’s management. You can hire a property manager for 5-10% of gross income. That’s fine if you live far away. But if you’re trying to do it yourself, you’ll spend 10-15 hours a month on rent collection, unit turnover, and tenant issues. It’s not hard, but it’s not passive either.
What you’re really buying
You’re not buying a building. You’re buying a recurring revenue stream. Think of it like a subscription business. Each tenant is a $100-$300 monthly payment that auto-renews. The average tenant stays 18-24 months. That’s longer than most apartment leases. And when they leave? You clean the unit, re-list it, and rent it again - usually within a week.
Here’s a real example: A guy in Ohio bought a 75-unit facility for $950,000 in 2022. He put $380,000 down. His monthly gross income? $14,200. After all expenses? $7,100 net. That’s $85,200 a year in profit. His down payment was paid off in under 4.5 years. Now he’s cash-flowing $85,000 a year with zero mortgage. He didn’t do anything fancy. Just kept the place clean, raised rents by 3% annually, and kept occupancy above 95%.
Who it works for - and who it doesn’t
This isn’t a side hustle for beginners. If you’re looking to flip it in two years? Don’t. Storage units need time to stabilize. You need at least 3-5 years to see real returns. You also need to be okay with being a landlord - even if it’s low-effort. You can’t outsource everything. You still need to approve tenants, handle disputes, and make sure the place stays secure.
It’s perfect for people who:
- Have cash to invest (no leverage, no credit card debt)
- Want predictable income without daily work
- Don’t mind being a landlord (even if it’s just 10 hours a month)
- Live near or are willing to travel to a growing market
It’s NOT for people who:
- Think it’s a get-rich-quick scheme
- Want to avoid all responsibility
- Can’t handle 6-12 months of zero cash flow while you fix or build
- Are in a market with oversupply - like a city with 10 new facilities opened last year
How to get started in 2026
Start by researching markets. Look at cities with:
- Population growth of 2%+ per year
- Median home price over $350,000
- Low homeownership rate (more renters = more storage need)
- Fewer than 3 new storage facilities built in the last 3 years
Use sites like SelfStorage.com or StorageFront.com to see current rental rates and occupancy. Then find a broker who specializes in storage facilities. They’ll show you deals that aren’t listed publicly.
Run the numbers before you buy. Calculate:
- Monthly gross income (units × rent)
- Monthly expenses (taxes, insurance, management, utilities, repairs)
- Net operating income (NOI)
- Cap rate = NOI ÷ purchase price
A good cap rate for storage is 7-9%. Anything below 6%? You’re overpaying. Above 10%? There’s usually a reason - high vacancy, bad location, or hidden repairs.
The future of storage units
Storage isn’t going away. In fact, it’s growing. More people are moving. More are living in small apartments. More are downsizing after divorce or retirement. The baby boomer generation alone is expected to downsize 15 million homes by 2030. That’s millions of boxes needing a home.
Technology is helping too. Automated gates, app-based rentals, and AI-powered pricing tools let owners raise rates dynamically. A facility in Atlanta now uses software that adjusts prices based on season, demand, and competitor rates. Result? 12% higher revenue with no extra work.
And yes, there’s competition. But the market is still fragmented. Over 70% of storage facilities are owned by individuals or small companies. Big players like Public Storage and Extra Space are buying up the best ones - but they can’t buy them all. There’s still room for smart, small investors.
Final verdict
Is buying storage units a good investment? Yes - if you have the cash, pick the right location, and treat it like a business. It’s not glamorous. You won’t get rich overnight. But if you hold it for 5+ years, you’ll likely end up with a steady, growing income stream that outperforms stocks, bonds, and even rental houses. It’s one of the few real estate plays that’s simple, scalable, and surprisingly resilient.
Don’t listen to the hype. Don’t buy the first unit you see. Do the math. Visit the facility. Talk to the manager. Check the occupancy records. If the numbers add up and the place is clean, it’s probably a solid bet. And in 2026, that’s more than most investments can say.
Can you make money buying just one storage unit?
No - not really. You can’t buy a single unit. Storage facilities are sold as whole properties, usually with 50 to 200 units. Even small facilities cost at least $500,000. You can’t invest in one unit like you would a stock. You’re buying the entire building and land. That said, you can buy a small facility with 20-30 units in a rural area for under $300,000. It won’t make you rich, but it can generate $25,000-$40,000 a year in profit.
Do storage units appreciate in value?
Yes - and faster than most real estate. Storage facilities have appreciated at an average of 5-7% per year over the last decade. In hot markets like Austin or Charlotte, some have jumped 15% in a single year. Why? Because demand keeps rising, and supply is limited. Unlike houses, you can’t build more storage units easily - zoning laws, parking rules, and construction costs make it hard. That scarcity drives up value.
Are storage units affected by recessions?
Surprisingly, no - not much. During the 2008 recession and the 2020 pandemic, storage occupancy actually went up. Why? People lost homes, moved to smaller places, or downsized. Storage became a necessity, not a luxury. Even in tough times, people still need to store furniture, boxes, tools, or seasonal items. It’s one of the most recession-proof real estate assets out there.
What’s the biggest mistake new investors make?
They focus on price, not occupancy. A cheap facility with 50% occupancy will lose money. An expensive one with 95% occupancy will make bank. Always ask for 12-24 months of occupancy records before buying. If the seller won’t show them, walk away. Also, don’t skip the inspection. Water damage, mold, or broken gates can cost $50,000+ to fix. Hire a storage facility inspector - they’re a real thing.
Can you finance a storage unit purchase?
Yes - but not like a house. Most banks won’t give you a 30-year mortgage. You’ll need a commercial loan with 30-40% down and a 10-20 year term. Interest rates are higher too - around 6-8%. Some investors use private lenders or seller financing. Others partner with someone else. The key is having strong cash flow to qualify. Lenders look at net operating income, not your personal credit score.