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For condominium & housing-estate juristic persons

Collect common fees on LINE, with slips checked automatically

HaiDaiMai is a common-fee collection system for Thai condominium and housing-estate juristic persons. You issue invoices for the whole project, residents scan a PromptPay QR and pay inside LINE with no app to install, and the system checks each slip and issues the receipt right away. Transparent per-unit pricing, LINE costs included.

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Free 1-month trial · No app for residents · Residents: 8 languages

Where does fee collection eat your team’s time?

Checking slips one by one in chats

Slips arrive through many channels and staff match every one against the bank statement by hand.

Making invoices and receipts by hand

Copying figures from spreadsheets, formatting documents and sending them unit by unit.

Residents won’t install another app

Residents already live in LINE, yet many systems ask them to install something new.

Late-fee mistakes lead to disputes

Condominium late-fee caps and housing-estate penalties work differently; one wrong calculation costs trust.

Three steps from invoice to receipt

How does HaiDaiMai work?

  1. Issue invoices for the whole project

    Common fees plus water charges from meters read on a phone. Invoices reach residents on LINE, with e-mail or SMS as backup.

  2. Residents pay inside LINE

    They scan a PromptPay QR carrying the invoice amount and attach the slip on the same page — no app needed.

  3. Slip checked, receipt issued

    Verified slips get a PDF receipt instantly; failed or unclear ones go to a review queue for staff.

What sets HaiDaiMai apart?

No app for residents

Works in LINE or any web browser; sign in with LINE or Google. Residents without LINE are notified by e-mail, and invoices go by SMS when there is neither LINE nor e-mail.

Automatic slip verification

A slip-verification provider confirms a real transfer, into your account, never used before.

LINE costs included

Messages go through the HaiDaiMai LINE Official Account — no LINE plan to subscribe to or pay for.

Late fees that follow the law

Condominiums: rates above 12% a year (20% after 6 months overdue) under Section 18/1 cannot be set. Housing estates: the rate set by the land allocation committee.

Meter reading on a phone

Photograph each dial as evidence, keep going when the signal drops, and log common-area water meters too.

Import your data from Excel yourself

Import units, co-owners, tenants and opening balances yourself; errors are flagged before saving.

Money goes straight to you

The PromptPay QR points to the juristic person’s own account; HaiDaiMai never receives or holds the money.

Residents: 8 languages

Residents choose the language of their screens and notifications — ideal for projects with foreign owners or tenants. Staff screens are in Thai and English.

  • ไทย (Thai)
  • English
  • မြန်မာ (Burmese)
  • 简体中文 (Simplified Chinese)
  • हिन्दी (Hindi)
  • ລາວ (Lao)
  • Tiếng Việt (Vietnamese)
  • 日本語 (Japanese)

What does the system look like?

Sample screens from the system — fictitious data

My bills screen on a resident phone for unit A-101 showing the amount due, a Pay now button and four monthly bills marked unpaid or paid
Resident: My bills — amount due and the status of every bill
Invoice detail screen on a phone showing the common fee, total amount due and a sample PromptPay QR to scan and pay
Resident: bill details with a PromptPay QR
My settings screen on a phone showing the preferred language, the linked unit, a button to add a unit with an invitation code and sign-in methods
Resident: My settings — language, units and sign-in methods
Staff: slip review queue (illustration)
Documents: Thai / English PDF receipt (illustration)

For juristic staff

Real desktop screens from the staff side of the system — fictitious data

Unit register screen of a sample condominium listing units A-101 to B-103 with co-owners, tenants, bill recipients and resident account link status
Unit register: co-owners, tenants, bill recipients and resident account status
November water meter reading round screen showing readings, usage, statuses recorded, anomaly, not recorded and the water charge of each unit
Water meter reading round: per-unit reading status, anomalies and water charges
Period invoice list screen showing invoice numbers, units, due dates, outstanding amounts, payment statuses and the batch print invoices button
Invoices: payment status, outstanding balance and batch printing

How much does HaiDaiMai cost?

Four plans — Standard, Plus, Pro and Max — priced per unit in tiers. Every plan includes LINE, slip checks and backup SMS. Standard is available first; the others follow as their features are ready.

StandardAvailable now
From
8
THB / unit / month
THB 790 / month minimum
PlusComing soon
From
10
THB / unit / month
THB 990 / month minimum
ProFull resident servicesComing soon
From
13
THB / unit / month
THB 1,490 / month minimum
MaxPremiumComing soon
From
18
THB / unit / month
THB 1,990 / month minimum

Free 1-month trial, then pick a plan · Beta: the first 20 get 2 months free plus a discount and a plan-upgrade voucher

Per unit per month in cumulative tiers (units 1–100 / 101–500 / 501 onwards) · Pay yearly, pay for 10 months · Same price for condos and estates · Excludes VAT

Standard example: 100 units THB 800 / month · 300 units THB 1,800 / month

Calculate your price

Who is HaiDaiMai for?

Condominiums

Fees per m² or by ownership ratio, bills to co-owners or tenants, residents can use 8 languages

Learn more

Housing estates

Fees per square wah, 1-, 3-, 6- or 12-month cycles, penalties per committee rules

Learn more

Property management firms

Many juristic persons from one account, data kept separate, team roles per project

Learn more

Frequently asked questions

Do residents need to install an app?

No. Residents open invoices, pay and view receipts in LINE or a web browser. They sign in with LINE or Google and link their unit with an invitation code from the office. Residents without LINE are notified by e-mail, and invoices go by SMS when there is neither LINE nor e-mail.

Which languages can residents use?

Residents can choose from 8 languages: ไทย (Thai) · English · မြန်မာ (Burmese) · 简体中文 (Simplified Chinese) · हिन्दी (Hindi) · ລາວ (Lao) · Tiếng Việt (Vietnamese) · 日本語 (Japanese), for both screens and notifications. Staff screens are in Thai and English, and this website is in Thai and English.

How are slips checked? What about fake or reused slips?

Each slip goes to a slip-verification provider that confirms the transaction is real. It passes when the transfer is real, paid into your account, never used before and not too old; the amount actually transferred is recorded. Failed slips go to a staff review queue, and you can require staff approval for every slip.

Whose account receives the money?

Straight into the juristic person’s own bank or PromptPay account. HaiDaiMai only generates a QR that points to the account you set, and never receives or holds the money.

Can we move our existing Excel data?

Yes. Upload Excel files of units, co-owners, tenants and outstanding balances yourself. The system checks for errors and lists what to fix before saving.

Does it work for housing estates?

Yes. Set the project type to housing estate, charge per square wah or a flat amount per plot, bill every 1, 3, 6 or 12 months, and apply the penalty rate set by the land allocation committee.

Do we need our own LINE Official Account?

No. Invoices and receipts are sent through the HaiDaiMai LINE Official Account and LINE costs are included in the price. Using an OA under your own name is coming soon.

How is resident data protected?

Each juristic person’s data is kept separate, staff can use two-factor sign-in, important changes are logged, data is backed up daily, and HaiDaiMai signs a data processing agreement (DPA) with every juristic person.

How long is the free trial?

A free 1-month trial with your real project data and the launch feature set (Standard). We set up your workspace and guide you through the import. During Beta, the first 20 juristic persons get a free 2-month trial plus a discount and a plan-upgrade voucher.

Last updated

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