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Learn more about Invoice in Singapore

An invoice is a document that shows a transaction or sale made by your company. It proves a creditor’s claim against a debtor, or a client’s debt to a supplier. This template shows the creditor (business), the debtor (consumer), the amount owed, and the date. It binds the debtor to pay the sum by the due date indicated. When selling/buying things, fixed assets, or performing a service, an bill of sale must be created. We provide a tailored solution for your Singaporean business as well as expert accounting help if required.

Table of contents


What is an Invoice?

An invoice is a document that enumerates the products and services that a company provides to a customer and establishes the customer’s obligation to pay the company for those services and goods. Invoicing is critical for small businesses since there are the legal documents that allow firms to get paid for their services. Invoice templates are a common method to get started. This template save you time by eliminating the need to re-enter the same data each time you create an invoice. It serve a crucial function for both the company that sends the bill of sale and the customer who receives it. It helps small businesses speed up the payment process by notifying clients when a payment is due. Invoices give an orderly record of a cost with itemized data for clients and can aid in record keeping.

Why use an Invoice?

Businesses must deliver bill of sales in order to request payment. An invoice is a legally enforceable agreement that demonstrates both parties’ agreement to the indicated price and payment terms. However, there are additional advantages to utilizing invoices.

1. Keeping records
The capacity to preserve a legal record of the purchase is the most crucial advantage of this document. This allows you to discover when a product was sold, who purchased it, and also who sold it.

2. Payment monitoring
A bill of sale is a significant accounting tool. It makes it easier for both the vendor and the purchaser to keep track of payments and amounts owing.

3. Legal safeguards
A valid invoice is legal documentation of a pricing agreement between the customer and supplier. It safeguards the merchant from bogus litigation.

4. Simple tax filing
Recording and keeping all sales invoices assists the firm in reporting its income and ensuring that the right amount of taxes is paid.

5. Business intelligence
Bill of sale analysis may assist organizations in gathering information from their customers’ purchasing behaviors and identifying trends, popular items, peak purchasing hours, and more. This aids in the development of efficient marketing tactics.

What does an Invoice include?

There is no defined structure for an invoice; nonetheless, invoicing regulations require a bill of sale to have the following fields (only pertinent fields must be filled):

➤ The supplier's name, address, and GSTIN
➤ A consecutive serial number, in one or more sequence, containing alphabets or numerals or special characters such as hyphens, dashes, and slashes symbolised as "-" and "/" respectively, and any combination thereof, unique for a fiscal year
➤ The date it was published
➤ The recipient's name, address, and GSTIN or UIN, if registered
➤ The recipient's name and address, as well as the address of delivery, as well as the name of the State and its code, if the recipient is not registered and the taxable supply is worth fifty thousand rupees or more
➤ Goods HSN code or Accounting Code of Services
➤ Items or services description
➤ Quantities of products and units or Unique Quantity Code
➤ Total value of products or services supplied or both
➤ Subject to tax value of supply of goods or services or both, after any discount or abatement
➤ The tax rate
➤ The amount of tax levied on taxable products or services
➤ Address of delivery, if different from the place of supply
➤ Signature or digital signature

What is an Invoice ID?

An ID, also known as an invoice number, is a unique identifier provided to each bill of sale created by a firm. The number is an important feature since it helps a firm to quickly identify and refer to specific transactions with clients.
An ID can contain both numbers and letters. While invoices do not have to be numbered consecutively, you must design a consistent ID system and verify that no number is assigned more than once.

How are the ID assigned?

There are several methods that firms may use to assign invoice numbers. Here are some typical methods for allocating bill of sale numbers:

1. Sequential

This is the most basic technique of assigning invoice numbers and is the approach used by the majority of cloud-based invoicing software. To give sequential numbers, begin with any number (typically 1) and assign the next number in the series to each subsequent bill of sale. As an example:

001, 002, and 003

Sequential invoice IDs make it simple to maintain consistency and avoid giving duplicate IDs.

2. Chronological

To assign invoice numbers chronologically, sort all bill of sale by the day they were produced.
As a result, the first sequence of numbers in the ID will always correspond to the date. Your number will include unique digits given to that invoice after the date. For chronological numbers, you can use any date format you choose. For example, if a bill of sale is produced on June 10, 2022 and the unique invoice number is 0020, this number might be assigned to the invoice: 2022-06-10-0020.

3. Based on customer ID

Some companies issue unique customer IDs to each of their clients, which may be used to assign invoice numbers. The procedure for assigning numbers based on customer ID is identical to that for chronological numbering. The ID will begin with the client ID number, followed by a unique number. For example, if you’ve assigned a customer ID number of 573 to your client and the unique number, you’re using is 020, you can use the customer ID approach to assign an invoice number of 573-020.

4. By project number

If your company works on many projects at once and bills clients per project, you may want to issue invoice numbers based on project ID. This technique is widely used in the building business. To attribute numbers by project ID, the first segment of your number will be the project ID, followed by a sequential number to distinguish between different invoices issued for this project. As example, if you were making a bill of sale for project 1234, you might designate the project’s initial number as 1234-001.

How does it work in Singapore?

Your tax invoice is required to support your input tax claim. According to IRAS, you must maintain every tax document that your company gives to its customers and that its suppliers give you.

Tax invoices must be kept in the system for the past five years. You should not, however, submit tax papers along with your Goods and Services Tax returns.
Your GST-registered clients must get a tax invoice.
You must produce within 30 days after providing goods, according to IRAS.
Your clients will utilize tax statements to prove that they paid input tax on standard-rated transactions.
A tax statement is not required if you are dealing with zero-rated items, deemed supplies, and excluded commodities, or if you are dealing with a non-GST registered buyer. Furthermore, you cannot charge Goods and Services Tax if you are not registered with IRAS, which means you would send bill of sales to your consumers without tax data.
If you are not a registered GST seller but your consumers need a tax invoice, just state that the price does not include GST or enter a zero for Goods and Services Tax.

Difference between an Invoice and a tax Invoice

Remember that a tax invoice is a document that a certified vendor provides to another registered vendor in order to execute input tax relief.

Your ordinary bill of sale, on the other hand, does not include any information concerning Goods and Services Tax. However, the amount owed is shown on both invoices.

Here are some additional distinctions:
A tax invoice is a bill issued by approved vendors to customers that is recognized by tax authorities such as IRAS. It displays the tax payable for standard-rated goods and services. A bill of sale is a statement sent by a buyer to a seller that shows how much the consumer must pay for the products or services.
The tax invoice and the ordinary one have the same contents. However, the tax bill displays the amount of tax or GST owed. Goods and Services Tax is not included in the invoice. A registered business transmits a tax invoice to some other firm for sales or producing products.

In contrast, a company sends a bill of sale to the final client. A tax invoice is prepared by a business to request payment for given goods and services. It makes use of the tax report to seek tax relief or credit.

The donor and recipient of the tax paperwork must be IRAS registered. To send standard bill of sales to your customers, however, you just need to be a registered firm with the Accounting and Corporate Regulatory Authority (ACRA).

Your tax invoice summarizes the outstanding amount from a taxable sale and may include the following information:

➤ The phrase "Tax Invoice" must appear
➤ Seller's name, contact information, and address
➤ Invoice number
➤ Invoice issue date
➤ Buyer's name and address
➤ Tax identification number
➤ Characterization and volume of products/services
➤ Cost per unit
➤ Total amount plus taxes
➤ Tax charged on each item

Keep all tax bills and standard invoices for a minimum of five years. Regular invoices will be required for your annual accounts and statement of income. In addition, tax statements are essential for obtaining tax credits.

How do I create an Invoice in Singapore?

Method of issuing an invoice in the case of a supply of goods, it must be produced in triplicate as follows:

1. The original copy is designated as “Original for recipient”

2. The duplicated version is designated as “Duplicate for transporter”

3. The triple copy is designated as “Triplicate for supplier”.

In the event of service supply, the invoice must be made in triplicate as follows:

1. The initial draft is labeled “Original for recipient”

2. Marking the duplicate copy as “Duplicate for supplier”

The serial number of invoices issued throughout a tax period must be provided electronically in Form GSTR-1 via the Common Portal.

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