A corner shop. ~300 sq ft. Zero staff. One to two hours of the owner's time a day. Net profit: HK$15,000 (US$1,927) every single month.
This is a self-service laundromat in Sham Shui Po — one of Kowloon's oldest, most densely packed working-class districts in Hong Kong. Kowloon is the urban peninsula that sits just across the harbour from Hong Kong Island. Sham Shui Po sits deep in the heart of it — narrow streets, pre-war and post-war residential blocks, wet markets around every corner, and a community that's lived here for generations. Most of these aging buildings don't come with in-unit washers. Laundry isn't a lifestyle choice here. It's a utility.
Note: The founder requested full privacy. We're calling him Kenny Chan and his shop SpinBase Laundry. Both are fictional names.
📊 Key Unit Economics
Metric | Figure |
|---|---|
Wash cycle | HK$16 (US$2.05) / 30 min |
Dry cycle | HK$24 (US$3.08) / 40 min |
Shop size | ~300 sq ft |
Monthly gross revenue | HK$27,000 (US$3,462) |
Monthly total expenses | ~HK$11,550 (US$1,481) |
Monthly net profit | ~HK$15,000 (US$1,923) |
Net profit margin | ~55.6% |
Staff | 0 |
Owner daily time | 1–2 hours |
The Numbers Breakdown
Item | Monthly (HKD) | Monthly (USD) | |
|---|---|---|---|
Revenue | Self-service laundry | HK$13,000 | ~US$1,667 |
Drinks machine + wash-for-you service | HK$4,000 | ~US$513 | |
SF Express smart locker (fixed rental) | HK$10,000 | ~US$1,282 | |
Total Revenue | HK$27,000 | ~US$3,462 | |
Expenses | Rent | HK$10,000 | ~US$1,282 |
Electricity | HK$1,000 | ~US$128 | |
Water | HK$50 | ~US$6 | |
Inventory (detergent, softener, bags) | HK$300 | ~US$38 | |
Salaries | HK$0 | US$0 | |
Total Expenses | ~HK$11,550 | ~US$1,481 | |
Net Profit | ~HK$15,000 | ~US$1,923 |
Inventory prorated monthly from HK$600 (US$77) bi-monthly restocking.
🚀 The Winning Factor
The location is the moat. Sham Shui Po's tenement stock wasn't built with laundry rooms. Residents have no in-home alternative. Tommy didn't create demand — he parked himself directly in front of it. The corner spot gives him double street frontage. Every residential building in the block is a feeder.
The smart locker is a second income source behind the same glass door. SF Express — one of Asia's biggest parcel delivery networks — pays a fixed HK$10,000 (US$1,282) per month to place their smart pickup locker in Tommy's shop. Fixed. Guaranteed. Zero extra labor. That single decision almost covers rent on its own.
No people, no payroll, no problem. The payment system is fully cashless and remotely tracked. Zero full-time staff. Zero part-time staff. Tommy handles the optional wash-for-you (代洗) service personally — and even that is upside, not a requirement.
📈 The Numbers: How It Makes Profit
Revenue is HK$90,000 (US$11,538)/month across roughly 100 student sessions.
The heaviest cost is rent — HK$44,500 (US$5,705)/month, including management fees and government rates. That's 49.4% of revenue. Steep on paper, but it's a 1,000 sq ft multi-room unit inside a residential mall in Kowloon. The built-in foot traffic that comes with the address justifies every dollar.
Staff is the second line: HK$22,000 (US$2,821)/month for six part-time teachers.
3 foreign teachers: HK$100–150/hr (US$12.82–19.23/hr)
1 Mandarin teacher: HK$140/hr (US$17.95/hr)
2 local teachers: HK$80–100/hr (US$10.26–12.82/hr)
Nobody's full-time. No heavy benefits overhead. The model keeps labor tight.
Remaining fixed costs: HK$1,000 (US$128) electricity, HK$500 (US$64) telecom, HK$430 (US$55) School Tracs system.
Bottom line: HK$20,471 (US$2,625) net profit per month. Margin: 22.7%.
One flag on seasonality: summer is peak. Christmas is dead slow. Cash flow planning is not optional here — this is not a flat-line business month to month
🛠️ The Grind
Tommy's morning starts on his phone, not on his feet.
He checks the digital dashboard — overnight revenue, machine status, pending wash-for-you orders. If everything clears, he's already moved on.
He shows up in person around 10am. Tops up detergent. Visual check on all eight machines. Clears any laundry orders from the overnight queue. Done within an hour.
"People think owning a shop means you're chained to it," Tommy says, wiping down a machine door. "I spent the first few months making sure that would never be true."
The shop doesn't advertise. In Sham Shui Po, word travels the old-fashioned way — neighbors talk. The aunties upstairs tell their friends. Night shift workers share it in group chats. A 24-hour, cashless, well-maintained laundromat is still rare enough in old Hong Kong neighborhoods to stand out without a single marketing dollar.
Late-night delivery riders. Pre-dawn market vendors. Students in rooftop subdivided flats with no washing facilities. The shop works for all of them — without Tommy needing to be there.
He runs other ventures alongside this one. The laundromat isn't meant to be his whole story. It's built to fund the rest of it — quietly, reliably, month after month.
🏆 Winning Rating: 7.5 / 10
What do you think? Here's our take:
Zero-staff automation — cashless, remotely managed, minimal daily touch-point
Dual passive income — machine revenue plus guaranteed SF Express locker rental
Structural demand — old residential density in Sham Shui Po means the customer base exists and isn't going anywhere
Lean cost base — HK$11,550 (US$1,481) monthly outgoings against HK$27,000 (US$3,462) gross is a tight, clean operation
⚠️ Growth ceiling — HK$15,000 (US$1,923)/month is strong for the hours invested, but scaling means a second unit or second location
⚠️ Lease terms — this business is only as stable as its rental agreement; renewal conditions matter
Three hundred square feet. Eight machines. One person. One to two hours a day. Fifty-five percent margin.
This isn't a story about disruption. It's about placing yourself exactly where demand already lives — and letting the numbers run.
Tell us what you think.
Do you agree with our take? Comment below and let us know!
Till next time,