Coming soon · not on sale yet and no advance orders · try the demo dorm today, no sign-up
For owners of dorms, apartments and rental rooms in Thailand, 3–100 rooms
Close the whole building'srent cycle in 15 minutes*
Tenants pay through LINE, no app to install — coming soon
No sign-up · "Baan Hom Mali", 30 rooms · Thai interface
Read meters on your phone. RentX works out every bill with the meter photo and a PromptPay QR that already holds the amount, and sends them to every room at once. Tenants scan, pay and attach the slip; you confirm with one tap.
- A yearly fee by dorm size, the same every year
- Try the demo dorm, no sign-up
- Coming soon
* Counted from the moment all meters are read until every bill is checked, issued and sent, for a building of about 20 rooms. This is a design target; it will be measured with pilot dorms before launch.
The bill arrives in the dorm's LINE
Baan Hom Malithe dorm's LINE OA
Rent bill, Oct 2026Room 204
- Rent
- 3,500.00
- Electricity120 units × 4.50
- 540.00
- Water6 units × 18.00
- 108.00
- Total
- 4,148.00 baht
Due 5 Nov 2026
Scan the QR, pay, attach the slip
sampleView bill and meter photosPay with PromptPay QR
Paid! The slip is attached.
The owner confirms in one tap
Slip received · not a duplicate · waiting for the owner
Payment confirmed by the owner · view receipt
Every month-end, the same chores come back
Meters in a notebook, a calculator for every room
One wrong digit and the whole bill is wrong — then you hunt for the mistake.
Bills sent one chat at a time
And the same question every month: why is electricity higher? Tenants never see the meter.
Slips scattered across chats
Who paid, who did not, and was this slip already sent last month?
Unsure about the 2025 OCPB rules
Water and electricity may not exceed what the utility charges you, but your rates were never checked against the real bill.
Three steps, all on your phone
Try the demo dorm right now in the browser of your phone or computer — nothing to install
Read the meters
A big number pad and a photo of each meter; units are worked out instantly.
Details
Walk room to room with a big number pad and photograph each meter as proof. Units are calculated instantly, and odd readings — going backwards or jumping up — are flagged.
Check and send the whole building
Bills with meter photos and a PromptPay QR go to every room at once.
Details
Itemised bills with meter photos and a PromptPay QR holding the amount. The OCPB 2025 checker speaks up before sending. Bills go to a LINE OA in your dorm's own name, or by Telegram, e-mail or link.
Get paid, confirm in one tap
Tenants attach the slip, duplicate slips are caught, you confirm in one tap.
Details
Tenants scan with their bank app and attach the slip. Duplicate slips are caught; you confirm with one tap and the receipt is issued for you.
Everything a dorm needs every month
Large text, big buttons, plain words — made for owners of every age
Clear bills with meter photos
Every line shows where it comes from; tenants see the meter photos themselves.
Details
Every line shows where it comes from, e.g. "150 units × 4.50 = 675.00". Tenants can see the readings and photos themselves, so they ask less.
Duplicate-slip guard
A slip used before is flagged at once · checking slips with bank data is an optional add-on.
Details
The QR on each slip is read and a slip that was used before is flagged at once. A dorm that turns on the add-on "check with bank data" also sees whether the amount, the transfer time and the receiving account match the bank's data. You confirm the payment with one tap.
Checking with bank data is an add-on each dorm chooses to turn on. Slips that do not match, or cannot be checked yet, wait for you — and you should still keep an eye on the dorm's account as usual.
OCPB 2025 rules checker
Speaks up before you send · not legal advice.
Details
- Water and electricity no higher than the utility charges you
- Deposit plus advance rent no more than 3 months
- Bills sent at least 3 days before the due date
- A reminder of the deposit refund deadline after move-out
Warnings based on the numbers in the system — not legal advice.
Unusual usage and leak hints
A big jump is flagged for a look · a hint, not proof of a leak.
Details
Usage is compared with the room's previous months and with similar rooms; a big jump is flagged for a look. A leak-test helper: turn everything off, read the meter twice, see the loss per hour and per month.
A hint to go and check, not proof of a leak; a leak smaller than the meter can register may not show.
Easy for tenants
No app, no account: bills open from LINE or a link.
Details
No app, no account, no ads, no fees. Bills open from LINE or a link. Tenant pages come in Thai and English.
Send bills your way
- A LINE OA in your dorm's own name — LINE's free plan is enough for a typical dorm
- Telegram
- A link for any chat app, or a printed bill
WhatsApp is not supported yet
Free tools, no sign-up
They run in your browser; nothing you type is sent anywhere.
Rent bill + PromptPay QR
Enter meter readings and rent; get a bill whose total matches the QR to the satang. Save it as an image for LINE.
Make a billElectricity rate from the real bill
Divide the building's electricity bill by its units: the rate that stays within cost, and the monthly difference to what you charge.
Calculate
The free tools are in Thai.
Questions
Is LINE OA free?
LINE OA has a free plan of 300 messages a month (LINE's terms as of Oct 2026). RentX is designed to fit it for a typical dorm of up to about 30 rooms; 31–50 rooms use the message-saving mode.
If the quota runs out, tenants still open their bills through the link. LINE may change its plans, and we charge nothing for LINE.
What do tenants have to do?
No app and no account. They open the bill from the dorm's LINE or a link, scan the QR with their bank app and attach the slip on the same page.
With LINE, tenants add the dorm as a friend and register once. No ads and no fees.
What does the OCPB checker do?
It warns about the numbers in the system — a rate above the real bill, a deposit over 3 months, a due date too close — so you can fix them before sending.
It is not legal advice. The 2025 notice applies to landlords with 3 or more units, except dormitories registered under the Dormitory Act and hotels. Ask an expert about your own case.
Can bills go out by WhatsApp?
WhatsApp is not supported yet. Bills go out by LINE OA, Telegram, e-mail and link.
Can I buy it now?
Not yet, and we take no advance orders: the system is being developed and tested and opens once it is ready for real use. Meanwhile, try the demo dorm without signing up.
Try it first — no sign-up
Open the demo dorm "Baan Hom Mali" (30 rooms) and walk through reading meters, closing the cycle, sending bills and confirming slips. What you try stays in your browser only.
Coming soon · no advance orders