GST on Renovation in Singapore

The rate is 9%

Singapore GST is 9%. On a quotation it should appear as its own line calculated on the subtotal, not folded into the individual rates, so that you can see both the work and the tax.

On a $45,000 renovation that is a little over $4,000, which is large enough that a quote quietly including or excluding it changes your comparison completely.

Not every contractor charges it

A business in Singapore is only required to register for GST once its taxable turnover crosses the statutory threshold. Plenty of smaller renovation outfits and sole proprietors sit below it and therefore neither charge GST nor remit it.

So a quotation with no GST line is not automatically a red flag. What is a red flag is a quotation that charges GST without showing a GST registration number, because a business collecting GST is registered, and a registered business puts the number on its documents.

• —GST charged, registration number shown: normal
• —No GST charged, no number: normal for a smaller contractor
• —GST charged, no number anywhere on the document: ask before you pay anything

Comparing a quote with GST against one without

Compare the pre-GST subtotals, then add the tax back to whichever one has it. Comparing a GST-inclusive total against a GST-exclusive one makes the registered contractor look nine per cent more expensive than they are, and that is a decision made on the wrong number.

What to check on the document

That GST appears as a separate line with the rate stated. That the registration number is on the quotation if GST is being charged. And that the payment stages are calculated in a way you can follow, since each staged payment will carry its share of the tax.

The arithmetic on a staged payment

Renovation here is paid in stages rather than as a deposit and a final bill, so the tax arrives in stages too. The common split is ten per cent on confirmation, forty on commencement, forty at the midpoint and ten on handover, and each of those carries its own share.

On a $45,000 job before tax, GST at 9% is $4,050 and the total is $49,050. Every stage is then that stage’s percentage of the larger number, which is worth seeing written out because it is where people are surprised.

• —Check the stage amounts add up to the total, including the tax
• —A quotation that states stage percentages but not stage amounts is doing the arithmetic in your head
• —Variations added later carry GST too, at the rate in force when they are supplied

A quotation is not a tax invoice

They are two different documents doing two different jobs. A quotation is an offer to do work at a price. A tax invoice is what a GST-registered business issues for a supply it has made, and IRAS sets out what one has to contain, including the registration number and the amount of GST charged.

In practice you will receive both: a quotation up front, and an invoice at each payment stage. If you are only ever getting one of them, ask for the other, and note that the distinction is one of the things a quotation and a contract also get confused about.

If the rate changes part-way through

Singapore’s GST rate has moved more than once in recent years, most recently to 9% at the start of 2024, and a renovation that straddles a change is exactly the case IRAS publishes transitional rules for. Which rate applies to which part of the job depends on when the work is supplied and when it is invoiced rather than on when the quotation was signed.

You do not need to work this out yourself, and you should not try to from an article. What is reasonable is to ask the contractor to state on the quotation what happens if the rate changes during the works, because a document that has thought about it is a document less likely to produce an argument.

This is general information, not tax advice

Registration thresholds, rates and obligations change, and the treatment of a specific job can depend on details that are not on the quotation. For anything that turns on the answer, check the current position with IRAS or with an accountant rather than with a renovation blog.