Web Developer Invoice Template Singapore
A web development invoice bills a client for building or maintaining a website or app, by milestone, by the hour or as a monthly maintenance fee. 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 web developer invoice
- Invoice by milestone on bigger builds, so you are paid as the work progresses.
- Bill change requests separately, referencing the request and who approved it.
- Put recurring hosting and maintenance on its own line each month.
- Keep domain and hosting costs you pay for the client on separate lines.
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.
Web Developer Invoice Template Singapore: frequently asked questions
How do web developers usually bill?
Fixed price by milestone for new builds, hourly for changes and support, and a monthly fee for hosting and maintenance. This template shows all three.
Should I charge for out-of-scope work?
Yes. Agree changes in writing first, then bill them as separate lines with the hours and your rate, so the client can see why the total changed.
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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