Contractor Invoice Template Singapore
A contractor invoice bills a client for work done under a contract, often a fixed day rate for an agreed period or a set of milestones. This template is set up for Singapore: amounts in SGD, GST at 9% on each line. Change anything you like, then download it as a PDF.
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How to write a contractor invoice
- Quote the client's purchase order or contract number; many companies will not pay an invoice without it.
- Attach or reference the approved timesheet for the period you are billing.
- List expenses on their own lines and keep the receipts.
- Check whether your client must withhold tax from your payments in your country.
Not sure what to charge? Work out your minimum rate with the freelance rate calculator, and agree the price first with the quote generator.
What an invoice must include in Singapore
- The words 'Tax invoice'
- Supplier's name, address and GST registration number
- Customer's name and address
- Invoice date and an identifying number
- Description of the goods or services
- Total amount payable excluding GST, the GST rate and GST amount, and total including GST
- Separate gross amounts for any exempt, zero-rated or other supplies on the same invoice
- Generally issued within 30 days of the time of supply
Invoice rules in Singapore at a glance
- Tax
- GST, standard rate 9%. See all rates and the GST calculator
- Tax number
- GST registration number
- Title
- Tax invoice (GST-registered businesses)
- Not registered for tax
- A business that is not GST-registered must not charge GST or issue tax invoices.
- Small invoices
- A simplified tax invoice may be issued where the total including GST is S$1,000 or less, showing supplier name, address and GST number, date, invoice number, description, total including GST and a statement that the price includes GST. Tax invoices are not required for supplies to non-GST-registered customers (a receipt may be issued).
- Payment terms
- No statutory default payment period; the agreed terms apply.
- Late payment
- No statutory late payment interest or fixed compensation for B2B invoices. Interest applies only if agreed in the contract; the Building and Construction Industry Security of Payment Act covers construction payment claims only.
- Keep records
- At least 5 years.
Contractor Invoice Template Singapore: frequently asked questions
How do contractors invoice for a day rate?
Put the number of days worked as the quantity and your day rate as the price, with the period in the description, for example “Contract work, March 2026: 20 days”. Reference the approved timesheet.
Can I add expenses to a contractor invoice?
Yes, if your contract allows it. Put each expense on its own line, keep the receipts and do not add a markup unless it was agreed.
Do I have to charge GST on my invoices in Singapore?
A business that is not GST-registered must not charge GST or issue tax invoices.
How long must I keep invoices in Singapore?
At least 5 years.
Can I charge interest on late payments in Singapore?
No statutory late payment interest or fixed compensation for B2B invoices. Interest applies only if agreed in the contract; the Building and Construction Industry Security of Payment Act covers construction payment claims only. Work it out with the late payment calculator.
Is this invoice template free?
Yes. Edit the template in your browser and download it as a PDF for free, with no sign-up and no watermark. Nothing you type is uploaded.
Sources
The rules on this page were checked in October 2026 and are general information, not legal or tax advice. Check the official sources or ask an accountant in Singapore if you are unsure what your invoices must show.
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