Invoice format in Singapore: Tax invoice rules
A Singapore tax invoice must show 9 things, starting with the words "tax invoice", supplier name, address and gst registration number and invoice identifying number. GST is charged at 9%. The template below is pre-filled in SGD with en-SG formatting.
Pre-filled for Singapore: Tax Invoice, SGD, GST 9%. Illustrative amounts, not market prices.
From
Granite Services
12 Market Square
Singapore
billing@example.com
GST registration number: 201912345A
Tax Invoice
Bill to
Kestrel Partners
40 Station Road
Singapore
accounts@example.com
| Description | Qty | Rate | Amount |
|---|---|---|---|
| Project set-up fee | 1 each | $250.00 | $250.00 |
| Training workshop (half day) | 1 each | $500.00 | $500.00 |
| Software licence, annual | 2 seat | $150.00 | $300.00 |
| Monthly support retainer | 1 month | $400.00 | $400.00 |
- Subtotal
- $1,450.00
- GST (9%)
- $130.50
- Balance due
- $1,580.50
Notes
Illustrative amounts, not market prices.
Payment details
Bank transfer. Please quote the invoice number.
Made with Billwise - invoice-pdf-maker-app.web.app
Preview of the PDF. Everything stays in your browser: nothing is uploaded.
Singapore invoice facts
| Tax on invoices | Goods and Services Tax |
|---|---|
| Label printed | GST |
| Standard rate | 9% |
| Seller tax ID | GST registration number, format 201912345A |
| Registration threshold | Registration is compulsory once taxable turnover exceeds S$1 million in a calendar year, or is expected to in the next 12 months. |
| Document name | Tax invoice |
| Currency and locale | SGD, en-SG |
| Keep invoices for | 5 years |
| Facts checked | October 2026 |
What a Singapore tax Invoice must show
9 fields, from the sources listed below.
- The words "Tax invoice"
- Supplier name, address and GST registration number
- Invoice identifying number
- Date of issue
- Customer name and address
- Description of the goods or services
- Amount payable excluding GST for each item, in SGD
- GST rate and GST amount (9%)
- Total amount payable including GST, in SGD
Sample tax invoice in SGD
The tool above uses these lines. Illustrative amounts in SGD, not market prices.
| Item | Qty | Rate | Amount |
|---|---|---|---|
| Project set-up fee | 1 each | $250.00 | $250.00 |
| Training workshop (half day) | 1 each | $500.00 | $500.00 |
| Software licence, annual | 2 seat | $150.00 | $300.00 |
| Monthly support retainer | 1 month | $400.00 | $400.00 |
| Net total | $1,450.00 | ||
| GST 9% | $130.50 | ||
| Total due | $1,580.50 |
Worked GST example in SGD
A net amount of $1,000.00 at each GST rate of Singapore: the tax is the net amount times the rate, rounded to the currency's smallest unit.
| Rate | Net | GST | Gross |
|---|---|---|---|
| Standard 9% | $1,000.00 | $90.00 | $1,090.00 |
Number, date and currency format (en-SG)
How en-SG writes amounts and dates, computed with the browser's Intl API; the invoice tool uses the same formatting.
| Value | Written in en-SG |
|---|---|
| Amount 1234567.89 | $1,234,567.89 |
| Same amount with the ISO code | SGD 1,234,567.89 |
| Credit of 250 | -$250.00 |
| Plain number 1234567.89 | 1,234,567.89 |
| Date 31 December 2026 (long) | 31 December 2026 |
| Same date (short) | 31/12/26 |
| GST rate 9% | 9% |
Singapore invoicing rules
- The GST rate has been 9% since 1 January 2024, after rising from 8% in 2023 and 7% before that.
- A simplified tax invoice is enough when the total including GST is S$1,000 or less; it may leave out the customer details and show the GST-inclusive amount.
- Only GST-registered businesses may issue a tax invoice and charge GST; others should not print a GST number or a GST amount.
- A tax invoice in a foreign currency must also show the GST amount in Singapore dollars.
- Keep invoices and business records for at least five years.
E-invoicing, simplified invoices and record keeping
IRAS began phasing in GST InvoiceNow requirements in November 2025, starting with newly incorporated companies that register for GST voluntarily; other businesses can still issue PDF tax invoices as of October 2026.
A simplified tax invoice is allowed when the total including GST is S$1,000 or less.
Keep issued and received invoices for at least 5 years in Singapore.
How to make a tax invoice for Singapore
-
Set currency and format
Choose SGD and the en-SG format so amounts read like $1,234.50.
-
Title and number
Title the document "Tax Invoice" and number it in sequence, for example SG-2026-0073.
-
Your tax ID
Enter your GST registration number (format 201912345A) in the seller details.
-
Add GST
Add GST at 9%, or a reduced rate where the goods or services qualify.
-
Check and download
Check the 9 required fields above, then download the PDF.
Sources
General information, not tax advice; checked October 2026. Rules change: confirm with the tax authority or an accountant before relying on them.
Official sources
Frequently asked questions
What must a Singapore tax invoice include?
9 items: the words "tax invoice", supplier name, address and gst registration number, invoice identifying number, date of issue, customer name and address and description of the goods or services, plus 3 more listed above.
What GST rate goes on an invoice in Singapore?
The standard rate is 9%. On a net $1,000.00 that is $90.00 of GST.
How long must invoices be kept in Singapore?
At least 5 years, according to the sources on this page (checked October 2026).
Is e-invoicing mandatory in Singapore?
IRAS began phasing in GST InvoiceNow requirements in November 2025, starting with newly incorporated companies that register for GST voluntarily; other businesses can still issue PDF tax invoices as of October 2026.
Can I issue a simplified invoice in Singapore?
A simplified tax invoice is allowed when the total including GST is S$1,000 or less.
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