How to send rent invoices via WhatsApp (+ message templates)

Nearly every landlord chases rent through WhatsApp. But most still type ad-hoc messages: “Hey, this month’s rent please.” Messages like this are easy to ignore, easy to “forget to read”, and leave no clear record of what was actually billed.

The way you send invoices has a big effect on how fast tenants pay. A clean, itemised, professional-looking invoice is much harder to put off than a one-line chat with no detail.

In this article you’ll learn how to send rent invoices via WhatsApp and email professionally, from what to include in the message, to ready-to-use templates, to how to automate the whole thing so you never retype anything.

Want to send tidy invoices without retyping every month? Try Kamaru free, setup takes 5 minutes.

Why chasing rent by casual chat fails

Before we look at what works, let’s understand why the usual way falls short.

The message has no detail

“Rent this month please” doesn’t answer a tenant’s basic questions: how much, for what period, and where to pay. Every follow-up question they have is another excuse to delay.

Easy to “forget”, easy to dispute

Without a written breakdown, a tenant can say “I already paid half last time, right?” or “wait, isn’t this month covered?”. You then have to dig through old notes to argue back, and often the conversation ends without resolution.

No formal record of what was billed

A short chat is not a document. When there’s a dispute, when a tenant leaves owing money, or when the amount is contested, you have nothing that shows what was billed, when it was sent, and for which period.

Retyping eats time

Writing the invoice text from scratch for every tenant, every month, adds up. The more rooms you have, the stronger the temptation to shorten it to “rent please”, which just makes tenants more relaxed about it.

Mounting arrears often start here. We cover the root of it in 8 ways to reduce rent payment arrears, and one of the keys is a clear, consistent way of billing.

Anatomy of an effective rent invoice

A good invoice answers every question the tenant might have in one message, so there’s no reason to ask back or delay. Here are the components that should always be there.

1. Tenant name and room location Address them by name and mention the room or property. It makes the invoice feel personal, not like a broadcast.

2. Itemised breakdown Separate each line: rent for the period, deposit, down payment, or extra charges. Tenants have a right to know what each rupiah is for.

3. The billed period “Rent 7 November to 7 December” is far clearer than “this month’s rent”. An explicit period removes any doubt about which cycle you mean.

4. Partial payment status (if any) If the tenant has paid something already, show it: “paid Rp 500,000, still owed Rp 700,000”. This prevents arguments and shows you keep clean records.

5. Total and due date One clear total, plus the date it needs to be paid by.

6. How to pay Bank details or a QR code. The easier it is to pay, the faster it gets paid. If you’re on Kamaru, set your bank accounts and e-wallets up once in Bank accounts & e-wallets, and they’ll be printed automatically on every invoice (both the WhatsApp message and the PDF), so you never retype an account number. If you don’t have a QR payment set up yet, see how to set up QR payments for a rental property.

7. Your identity as the owner Your name and contact number at the end add a professional touch and make it easy for the tenant to reply.

Two ways to send invoices via WhatsApp

There are two main ways of doing this. Let’s compare them.

Method 1: Type manually (or copy from Notes)

You save a template in your Notes app, then copy and edit it every time you bill.

Pros:

No extra app needed
Free and flexible

Cons:

Have to swap the name, amount, and period by hand, easy to mistype
No automatic breakdown (you calculate the remaining balance yourself)
No record of which invoices you’ve already sent
No official document attached

This is fine for one or two rooms. But once you have more tenants, the risk of miscalculation and missed billings goes up with it.

Method 2: Automate with Kamaru (recommended)

Kamaru drafts the invoice message for you from your lease data, then hands it to WhatsApp with one tap. Here’s the flow.

Step 1: Open the tenant’s Invoices tab Go into the tenant’s details, then open the Invoices tab. You’ll see every invoice for that tenant, whether it’s paid, partial, or still unpaid.

Step 2: Choose Send invoice with a message On the invoice you want to send, tap Actions › → Send invoice with a message. Kamaru opens the preview screen. (If you just want to send the PDF without a written message, there’s a separate Share invoice (PDF) option on the same menu.)

Step 3: Review the message Kamaru drafts the message from your template: tenant name, room, per-item breakdown (rent for the period, deposit, others), partial payment status if any, total, account details (bank and e-wallet from your settings), plus your name and number. If you want to change anything, tap Edit to adjust the template (or edit it permanently from Settings → App settings → Message template).

Step 4: Share Tap Share › and pick:

WhatsApp, Kamaru opens the chat with your tenant, message pre-filled. Just hit send.
Email, opens your mail app with the tenant’s address, subject, and body filled in.
Copy message, copies the text to paste anywhere.
More, opens your phone’s system share sheet (Telegram, SMS, and so on).

Because the message is built from real lease data, the amount and period are always accurate, no more typos or bad math on remaining balances.

Need a system that drafts invoices for you? Start with Kamaru free, no card needed.

Set up Bank accounts & e-wallets first (once at the start)

Before looking at templates, set up your payment accounts so numbers never have to be retyped during billing.

In Kamaru, go to Settings → App settings → Message template → Bank accounts & e-wallets. Add the accounts you use for receiving payments:

Bank accounts (BCA, Mandiri, BRI, BNI, etc.), account number and holder name
E-wallets (GoPay, OVO, DANA, ShopeePay), number and holder name
Per-account toggles to control which ones print on documents

Once saved, this list appears automatically on every invoice you send (WhatsApp message and PDF), without you retyping anything.

WhatsApp invoice message templates

Here are a few templates you can use straight away or adapt. The Account details placeholder will auto-fill with your Bank accounts & e-wallets list when the message is drafted.

Template 1: Routine invoice (friendly and professional)

Hi [Tenant Name],

Here is the invoice for room [Room Number] ([Property Name]):

• Rent 7 Nov - 7 Dec: Rp 1,200,000

Total: Rp 1,200,000
Due: 7 November 2026

Please transfer to:
<Account details>

Thanks,
[Your Name]
[Your Number]

Template 2: Invoice with several items

Hi [Tenant Name],

Here is your invoice for room [Room Number]:

• Rent 7 Nov - 7 Dec: Rp 1,200,000
• Deposit: Rp 1,000,000

Total: Rp 2,200,000
Due: 7 November 2026

Please transfer to:
<Account details>

Thanks,
[Your Name]

Template 3: Invoice with partial payment

Hi [Tenant Name],

Here is the remaining balance for room [Room Number]:

• Rent 7 Nov - 7 Dec: Rp 1,200,000 (paid Rp 500,000, still owed Rp 700,000)

Balance to settle: Rp 700,000
Please clear it before 15 November 2026.

Pay to:
<Account details>

Once you've transferred, please send the proof.

Thanks,
[Your Name]

Template 4: Overdue reminder (firm but polite)

Hi [Tenant Name],

Rent for room [Room Number] for the period
[Period] is now past its due date.

• Rent [Period]: Rp 1,200,000

Please settle it through:
<Account details>

If there's an issue, let me know so we can work
something out.

Thanks,
[Your Name]
[Your Number]

In Kamaru, you only set templates like these up once (in Message template). After that, every invoice auto-fills with the correct name, amount, period, and account details, so you don’t have to write anything from scratch.

When to use email instead

WhatsApp is ideal for quick reminders and for most tenants. But email has its place:

Corporate or long-term tenants who want the invoice in their formal inbox
A tidy archive, email is easier to search back by date and subject
Tenants without a WhatsApp number but with an email address

In Kamaru, the Email option lives on the same Share menu. Your mail app opens with the tenant’s address, subject, and invoice body already filled in.

Attach the official PDF for documentation

A WhatsApp message is great for reminders. For formal documentation, especially where there’s dispute potential, you need something more official.

On the Send invoice screen, every invoice can be generated as a PDF invoice with the invoice number, itemised lines, total, status, a PAYMENT DETAILS block (the list of active accounts and e-wallets), plus the property identity, name, address, logo (if uploaded), and property contact number (if set in your profile). You can preview the PDF in the app first, then share it via WhatsApp, email, or save it to Files.

The PDF works well as:

A formal record of what was billed
An attachment for tenants who want a “proper” document
Your own archive should a dispute arise later

For tracking payments coming in after invoices are sent, see payment tracking guide.

Tips for getting paid faster

Sending a clean invoice is half the battle. Here’s how to boost the chances of getting paid on time.

Send before the due date, not after

Send the invoice 3 days before it’s due. This gives tenants time to prepare the funds and casts you as a helpful reminder rather than a chaser.

Be consistent on the same date

Send on the same date every month. Tenants get used to it and start preparing without being asked. Consistency also makes you look organised and serious.

Include easy payment options

List a QR code or at least 2 bank accounts. Per Bank Indonesia, the QRIS standard lets a single code accept payment from any bank or e-wallet in Indonesia, which is a real convenience for tenants.

Keep a record of every send

Track which invoices you’ve sent. With a proper system, you won’t accidentally bill someone twice or miss a tenant entirely. Discipline like this also aligns with OJK’s guidance on financial management.

Use a polite tone

Your aim is to remind, not to scold. Focus on facts (“we haven’t received the payment yet”) not accusations (“you haven’t paid”). Tenants who feel respected tend to cooperate more.

Do’s and don’ts

Do ✅

Include full detail: period, amount, total, due date
Send before the due date, consistently
Include easy payment options (QRIS/transfer)
Show the remaining balance if there’s been a partial payment
Keep a record of what you’ve sent

Don’t ❌

Send short messages with no detail (“rent please”)
Swap numbers by hand without double-checking (error-prone)
Bill with a blaming tone
Wait until well past the due date to chase
Bill without saying how to pay

FAQ

Is sending invoices via WhatsApp legally valid?

Yes. WhatsApp is a valid channel for delivering invoices, and many property owners use it. For more formal documentation, attach the PDF invoice too so there’s a written record.

What if the tenant has no WhatsApp?

Use email or another share option. In Kamaru, the Share menu offers WhatsApp, email, copy message, and share to other apps, so you can adapt to each tenant’s habits.

Do I have to rewrite the message for every tenant?

Not if you use a system with templates. In Kamaru, you set the template once, and every invoice auto-fills with the right name, room, amount, and period. You just review and send.

How do I bill a tenant who’s already paid part of it?

Show the detail: total invoice, amount paid, remaining balance. Kamaru automatically adds a note like “(paid Rp 500,000, still owed Rp 700,000)” on partially-paid items, so there’s no argument about the number.

What’s the difference between the WhatsApp message and the PDF invoice?

The WhatsApp message is a quick reminder that lands directly in chat. The PDF invoice is a formal document with the invoice number, itemised lines, and total, useful for archiving and formal proof. Ideally, send the message as a reminder and attach the PDF for documentation.

Is Kamaru free for sending invoices?

You can start free. The free tier already covers property, tenant, and basic invoice management. Try it to feel the flow, then upgrade to Pro when you need advanced features.

Wrap-up

The way you send invoices decides how quickly rent gets paid. An itemised invoice, sent consistently before the due date, with easy payment options, is far more effective than a short chat with no detail.

Three keys: complete detail (period, amount, total, due date), consistent delivery, and clean documentation. You can do it all manually, but as tenant count grows, a system that drafts invoices for you saves a lot of time and cuts errors.

Ready to send rent invoices more cleanly and professionally? Try Kamaru free today. Draft invoices automatically, send to WhatsApp or email in one tap, and attach the official PDF, all from one app. Setup takes 5 minutes, no card needed.