Invoice
Learn what an invoice is, what to include, the main types, and how e-invoicing works in Malaysia.
Published Wednesday 30 September 2026
Table of contents
Key takeaways
- An invoice asks your customer to pay for goods or services you've provided and records the details of the sale
- Clear payment terms, such as Net 14 days, tell your customer exactly when payment is due
- Accurate invoices sent on time help you track what you're owed and keep cash coming in
- Malaysia is phasing in LHDN e-invoicing by annual turnover, so check the latest timeline to see when it applies to you
What is an invoice?
An invoice is a document that asks your customer to pay for goods or services you've provided. It records the details of the sale, including what you supplied, the cost and when payment is due.
Say you're a graphic designer in Kuala Lumpur and you've just delivered a new logo to a local café. Your invoice tells the café owner what they owe for the logo and how to pay you. It also gives you both a record of the sale for your accounts.
What to include on an invoice
Handy resources
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Disclaimer
This glossary is for small business owners. The definitions are written with their requirements in mind. More detailed definitions can be found in accounting textbooks or from an accounting professional. Xero does not provide accounting, tax, business or legal advice.
A clear invoice gives your customer everything they need to pay you without follow-up questions. Most invoices include:
- your business name and contact details, plus your customer's name and address
- a unique invoice number, so you and your customer can track it
- the invoice date and the payment due date
- a description of each item or service, with the quantity and rate charged
- tax shown as a separate amount, if you're registered for Sales and Service Tax (SST)
- the total amount due
- how your customer can pay, such as bank transfer or online card payment
A detailed description shows your customer exactly what they're paying for. That cuts down on queries and helps them approve payment sooner.
Invoice vs quote, bill and receipt
An invoice requests payment of an actual amount owed, while related documents cover other stages of a sale. Here's how they compare:
- a quote gives an estimated cost before work starts, and your customer can accept it or ask for changes
- an invoice shows the actual time taken and actual cost once the job or sale is done
- a bill is what your customer usually calls your invoice when it reaches them
- a receipt confirms that your customer has paid
The same invoice has a different name depending on who's holding it. For your customer, it's a purchase invoice that they record as money they owe. For you as the supplier, it's a sales invoice that sits in your accounts until it's paid.
Why invoices matter for your business
Invoices keep money moving into your business and give you a clear record of every sale. They help you:
- request payment with clear amounts and dates
- remind larger customers, who may deal with many suppliers at once, that your payment is still due
- track who owes you money and how much
- keep accurate records for your accountant and at tax time
- plan ahead with a clearer picture of your cash flow
When your invoices are accurate and sent on time, customers can pay without coming back to you for missing details. That keeps a steady flow of cash into your business.
Common types of invoices
A standard invoice covers most everyday sales, and other types suit particular situations. Common types include:
- a standard invoice, which requests payment for goods or services you've already delivered
- a tax invoice, which SST-registered businesses issue to show the tax separately from the price
- a pro forma invoice, which sets out expected costs before a sale is confirmed
- a credit note, which reduces or cancels the amount on an earlier invoice
- a recurring invoice, which bills the same amount on a regular schedule, such as a monthly retainer
- an interim or progress invoice, which charges for one stage of a larger project
- an e-invoice, which is a structured digital invoice validated by Malaysia's tax authority
Invoice payment terms
Payment terms tell your customer when they need to pay you. You agree them upfront and show them clearly on every invoice.
Terms might be seven days, 14 days or a month, depending on what you and your customer agree. They're often written as 'Net 14 days', which means payment is due 14 days after the invoice date. Other common terms include 'due on receipt' for immediate payment and 'Net 30' for 30 days.
Shorter terms bring money in sooner, while longer terms may suit larger clients with set payment cycles. A clear due date on every invoice helps you reduce late payments and plan your spending with confidence.
E-invoicing in Malaysia
E-invoicing is Malaysia's system of digital invoices that the Inland Revenue Board of Malaysia (LHDN) validates. It's being rolled out in phases, so the date it applies to you depends on your annual turnover or revenue.
An e-invoice is a structured digital file in a machine-readable format such as XML or JSON. A PDF you email to a customer doesn't count. LHDN validates each e-invoice through its MyInvois system and assigns it a Unique Identifier Number, according to the LHDN e-invoice general FAQs.
The LHDN implementation timeline sets out when e-invoicing starts for businesses with annual turnover or revenue of:
- more than RM100 million, from 1 August 2024
- more than RM25 million and up to RM100 million, from 1 January 2025
- more than RM5 million and up to RM25 million, from 1 July 2025
- up to RM5 million, from 1 January 2026
Businesses with annual turnover or revenue under RM3,000,000 are exempt, based on the timeline LHDN updated on 30 August 2026. LHDN can revise these dates and thresholds, so check the timeline page for changes before you plan your setup.
Failing to issue a required e-invoice is an offence under section 120(1)(d) of the Income Tax Act 1967. LHDN's FAQs list a fine of RM200–RM20,000, up to six months' imprisonment, or both. Accounting software with e-invoicing support can help you prepare e-invoices as part of your usual invoicing routine.
How to create an invoice
Creating an invoice takes a few minutes once you know what goes on it. Follow these steps, and see this step-by-step invoicing guide for worked examples.
1. Add your business and customer details
Start with your business name and contact details, then add your customer's name and address. An invoice template saves you retyping these details each time.
2. Give it a number and date
Assign a unique invoice number and add the date you're issuing it. Numbering invoices in sequence makes them easy to find later and helps you spot any gaps.
3. List the goods or services you've provided
Describe each item clearly, with the quantity, rate and line total. If you're SST-registered, show the tax separately and add it to the total.
4. Set your payment terms and methods
Add the due date and your payment terms, such as Net 14 days. Include your bank details or a payment link so your customer can pay straight away.
5. Send it and follow up
Send the invoice as soon as the work is done, or at the milestones you agreed for longer projects. Keep an eye on due dates and follow up unpaid invoices promptly and politely.
Create and send invoices with Xero
Clear, timely invoices help you get paid on the terms you set and keep your records organised. With Xero, you can customise and send invoices online, then let automatic reminders follow up for you.
You can also offer your customers more ways to pay, so settling up is simple for them. Choose a plan that suits your business and get one month free.
FAQs on invoices
Here are quick answers to common questions about invoices.
Does sending an invoice mean you've been paid?
An invoice only shows money owed until your customer pays it in full. Record each payment against its invoice so you can see what's still outstanding.
How should you number your invoices?
Give every invoice a unique number in sequence, such as INV-0001 followed by INV-0002. Adding the year as a prefix, for example 2026-001, keeps records tidy as your business grows.
Can you change an invoice after you've sent it?
It's best to leave the original as it is and issue a credit note or a corrected invoice. That way, your records and your customer's show a clear history of what changed.
Can you ask for payment before you start the work?
Yes, you can invoice a deposit upfront for larger jobs. Once the work is done, you send a final invoice for the remaining balance.