IslandDorm vs Excel: Which Manages Your Thai Dormitory Better?
Published May 24, 2026 · 6 min read
Almost every Thai dormitory owner starts with Excel — it's free and familiar. But once you cross 15 rooms, you start asking yourself if the hours saved would be worth the cost. Here's an honest, numbers-first comparison covering everything from 5 to 300 rooms.
TL;DR
- 5+ rooms — IslandDorm saves 1–10 hours/month vs Excel (depending on size)
- Excel still wins if you're highly fluent with it, don't bill by meter, or don't want tenant self-pay
- IslandDorm costs ฿199–฿1,490/mo — pays for itself if your time is worth >฿100/hr
- Excel risks file loss, typos, broken formulas — IslandDorm has cloud + validation
- Tenants self-pay via LINE — Excel can't do this
Side-by-side breakdown
IslandDorm1. Why owners start with Excel — and why they switch
Excel is what most Thai owners learned in school. For the first 5–10 rooms it works fine. You control every cell, every row, and pay nothing extra.
Problems begin around 20–30 rooms: every month-end you sit calculating water/electric bills room by room, typing meter numbers, fixing formulas, opening Word to make invoices, saving as PDF, sending each tenant separately — 3–5 hours per month. Some months you typo and have to ask the tenant to refund. Some months a formula breaks because you shifted a row.
People switch for one of three reasons: (1) the time wasted costs more than the software, (2) tenants disappear and chasing them is impossible, (3) the Excel file got lost / corrupted / accidentally deleted by family.
2. Real time savings — the math
Monthly repeating work: (a) record meters (b) calculate bills (c) make invoices (d) send to tenants (e) chase payment (f) record receipts.
Former-Excel customers report: 5 rooms = 30–60 min/month, 20 rooms = 2–3 hours, 40 rooms = 4–6 hours, 60+ rooms = 6–10 hours — and that's before chasing overdue bills.
In IslandDorm the same work takes 10–15 minutes regardless of whether you have 5 or 300 rooms, because billing happens for every room at once.
If you value your time at ฿150/hour — 2 hours/month = ฿300. Starter at ฿199 pays for itself in the first month.
3. Where Excel still wins (honestly)
- You're highly fluent with Excel and the current time cost doesn't bother you — stay with what works
- Flat-rate rent that includes water/electric — Excel is plenty
- Custom reports (per-floor ROI, average tenancy length) — Excel lets you write any formula
- 100% offline use — Excel needs no internet at all
4. Five Excel problems IslandDorm solves
Mistyped meter → wrong bill → angry tenant
IslandDorm auto-highlights meter readings that jump >50% above average — catch errors before sending.
Broken formulas after row delete/paste
No formulas to break — logic lives in the system, users only enter actual meter values.
Excel file lost / deleted / laptop died
Data on Supabase Cloud (ISO 27001), auto-backed-up, accessible from any device.
Tenants ghost you — chasing on LINE forever
Send bill link with PromptPay QR. Tenants pay from their phone. You get instant notification when they upload the slip.
Re-billing or history lookup is painful
Every invoice and payment kept permanently. Search by room/name/date/status in seconds.
5. Billing workflow: Excel vs IslandDorm
- 1Open Excel file
- 2Copy last month's rows
- 3Type new meter numbers per room
- 4Verify formulas still work
- 5Print → Save as PDF per room
- 6Send LINE to each tenant separately
- 7Chase weekly
- 8Update 'Paid' column when slip arrives
IslandDorm6 steps- 1Open billing page — every room shows at once
- 2Fill missing meters (Tab moves to next row)
- 3Check the rooms the system highlighted
- 4Click 'Generate All Bills' — every PDF made at once
- 5Share link via LINE in one click
- 6Tenants pay themselves, you get notified
6. Migrating from Excel — what to do with old data
- Pro and above support CSV Import: export from Excel as CSV with columns (room_number, building_name, floor_number, base_rent, notes) and upload — every room created instantly.
- Existing tenant data: add through the Tenants page, 1–2 minutes per tenant (faster than re-typing in Excel).
- Old invoices: keep the Excel file as archive, start fresh in IslandDorm next month — no need to migrate history.
FAQ
Excel is literally free. Why pay hundreds per month?
Starter at ฿199/mo pays for itself the moment you spend more than 2 hours/month on dorm bookkeeping. That's time you can spend on anything else — plus it prevents costly mistakes.
Should a small 5–10 room dorm stay on Excel?
Depends on two things: do you bill by meter, and do you want tenant self-pay via QR/LINE? If yes — IslandDorm pays off even at 5 rooms because it eliminates chase time. If rent is flat-rate including utilities, Excel is enough. Free 30-day trial to decide.
What does IslandDorm do that Excel can't?
(1) Tenant self-pay via PromptPay link (2) Auto-highlight abnormal meters (3) Generate all PDFs at once (4) Real-time color-coded room map (5) Automatic cloud backup (6) Open from any device.
If I cancel, can I get my data back to Excel?
Yes — Pro and above export as CSV (opens in Excel). Data is retained for 90 days after cancellation in case you need to recover it.
How is it safer than Excel on my laptop?
Supabase Cloud has ISO 27001 + SSL/TLS encryption + daily automatic backup. Excel on a personal laptop — if the disk dies, the laptop is lost, or someone deletes the file, your data is gone forever.