Singapore
SingaporeGST invoice software for Singapore
Tax Invoices in Singapore dollars with 9% GST and your GST registration number.
Free for 5 invoices a month. Pro from $12 a month.
The Openn Group
GST reg. no.200312345A
Tax Invoice
OG/2026/0046
- Date
- 5 Oct 2026
- Due
- 20 Oct 2026
Bill to
Brew Street Cafe
| Item | Qty | Rate | GST | Amount |
|---|---|---|---|---|
| Logo design | 9% | 700.00 | ||
| Menu cards | 9% | 300.00 | ||
| Shop signboard | 9% | 550.00 |
Subtotal$1,550.00
GST 9%$139.50
Total$1,689.50
Set for Singapore
Made for how Singapore invoices.
Logo design$700.00
GST9%
- GST 9%
- $63.00
Total$700.00$763.00
GST
GST is 9%. Exports of goods and international services are zero-rated.
The Openn Group
GST reg. no. 200312345A
InvoiceTax Invoice
OG/2026/0046
GST reg. no.
The GST registration number is issued by IRAS. For most companies it matches the UEN. With it saved, your invoices are titled “Tax Invoice”. Without it they are a plain “Invoice”.
1234567.89$1,234,567.89
- On an invoice
- 5 Oct 2026
- On a bank statement
- 05/10/2026
SGD and local dates
Amounts are in Singapore dollars, and you can pick another currency on any invoice. A bank statement you upload is read the way banks in Singapore write dates.
- OG/2025/021129 Dec 2025
- OG/2025/021231 Dec 2025
- OG/2026/00011 Jan 2026
Financial year from 1 January
Invoice numbers start a new series each January, so the first invoice of the year is OG/2026/0001.
What a Tax Invoice needs to show in Singapore.
IRAS’s list for a tax invoice:
- The words “Tax Invoice”
- An identifying number and the date of issue
- Your name, address and GST registration number
- Your customer’s name and address
- A description and quantity of the goods or services
- The price before GST, any discount and the 9% rate
- The total before GST, the GST and the total payable, each shown separately
Check with your accountant for your case.
The Openn Group3
GST reg. no.200312345A3
1Tax Invoice
2OG/2026/0046
- 2Date
- 5 Oct 2026
- Due
- 20 Oct 2026
Bill to
Brew Street Cafe4
| Item5 | Qty | 56Rate | GST | Amount |
|---|---|---|---|---|
| Logo design | 9% | 700.00 | ||
| Menu cards | 9% | 300.00 | ||
| Shop signboard | 9% | 550.00 |
Subtotal7$1,550.00
GST 9%7$139.50
Total7$1,689.50
How to pay
- Account number
- 000123456789
- SWIFT / BIC
- OPNNSG22
Authorised signatory
for The Openn Group
Getting paid
From invoice to paid, the way Singapore pays.
Please find invoice OG/2026/0046 for $1,689.50 from The Openn Group, due on 20 Oct 2026.
invoice.theopenngroup.com/i/7kq2
- Sent by youEmail
- Not viewed yetViewed
Send it yourself
Share the invoice from your own email or any app on your phone. The track turns to Viewed when your customer opens it.
To pay
$1,689.50
How to pay
- Account number
- 000123456789
- SWIFT / BIC
- OPNNSG22
Your customer sees how to pay
Customers pay by bank transfer or PayNow. Print your bank account details, put your PayNow UEN in the invoice notes, and add a payment link if you take cards.
OG/2026/0046Brew Street Cafe
DuePaid+$1,689.50
05/10/2026 · BREW STREET CAFE/OG-2026-0046
Matched from your bank statement
Match it from your statement
On Pro, upload your bank statement. Dates written like 05/10/2026 are read correctly, and you match each payment in one click.
Keeping track
Who owes you, and the GST you charged.
Unpaid
$3,281
$2,762 overdue across 2 invoices
Mehta Pharma
OG/2026/0039 · $1,874.00 · 6 days late
Share reminderEmail
Unpaid and overdue, on Home
Each late invoice has its reminder written. You send it yourself, from your own email or any app on your phone.
- This monthThis month
- This quarterThis quarter
- Invoices
- 1338
- Net sales
- $4,736.00$13,708.00
- GST charged
- $318.24$866.52
GST reports, rate by rate
Pick the month, the quarter or the year. Sales are set out by GST rate, for you or your accountant to check before filing.
Pricing
What it costs in Singapore.
Free
$0
5 invoices a month
Unlimited quotations, up to 10 customers. Shows a few ads.
Pro
$12 a month
or $99 a year
Just you, on up to 3 devices, plus your accountant. Unlimited invoices, and payments matched from your bank statement.
Team
$25 a month
or $209 a year
Up to 3 people.
Business
$49 a month
or $419 a year
Up to 10 people.
Prices exclude GST.
FAQ
Questions from Singapore.
Does Openn Invoice make a proper Tax Invoice for Singapore?
Yes. Add your GST reg. no. in settings and each invoice is titled “Tax Invoice”, with GST worked out line by line at the rate you pick (9% and 0%) and totals in Singapore dollars. What it has to show in Singapore is listed on this page. Check with your accountant for your case.
Does it file my GST return?
No. Openn Invoice makes invoices and shows who has paid. It does not file returns or keep full accounts. Paid plans include a tax report and CSV downloads to hand to your accountant.
I am not registered for GST. Can I still use it?
Yes. Leave the GST reg. no. empty in settings and send invoices with no GST on them. They are titled “Invoice” instead of “Tax Invoice”. GST registration is required once taxable turnover passes S$1 million a year.
Can I bill customers outside Singapore?
Yes. Pick the customer’s country and currency on the invoice. A customer abroad is billed as an export, with no GST added. You see the reason on the invoice before you send it.
What does it cost in Singapore?
Free covers 5 invoices a month. Pro is $12 a month or $99 a year, with unlimited invoices, recurring invoices and bank statement matching. Prices exclude GST.
Have another question? Contact us
Other countries
Invoicing somewhere else?
Malaysia
Hong Kong
Australia
IndiaSend your next invoice in Singapore.
Free for 5 invoices a month.