Singapore GST calculator

Singapore GST is 9%, in force from 1 January 2024. Registration is compulsory once taxable supplies exceed S$1 million in a calendar year.

Worked example · Vat Amount

With Amount of 100, this model computes Vat Amount of 9. See the full working.

✓ Verified against 5 self-test cases Updated for 2026 · sources checked 2026-10-05

How gst in Singapore is calculated

The rate comes from the statute. Section 16(1) of the **Goods and Services Tax Act 1993** lists the rate’s whole history in one provision — 7% from July 2007, *"8% for the period from 1 January 2023 to 31 December 2023"*, and *"9% from and including 1 January 2024"*.

That two-step rise is still worth understanding, because the Act also says what happens to a supply that straddles the change: tax is chargeable *"at the tax rate of 8% on the part or the whole of the chargeable value of the supply that is treated as taking place ... before 1 January 2024"* and at 9% on the part after. So a single Singapore invoice spanning that new year can legitimately carry two rates, which is the kind of detail a flat rate table hides.

The registration test is a **calendar year**, which makes Singapore unusual here: most countries in this catalog measure a rolling twelve months, so their test can trip in any month, while Singapore’s resets each January. The First Schedule asks whether the total value of taxable supplies *"in that calendar year has exceeded $1 million"*. Exports and international services are zero-rated and most financial services are exempt — different mechanisms from a reduced rate, so neither appears here as a band you can pick.

Worked example

ShowHide the full working: 4 inputs, 6 computed steps
100.00 SGD net at 9%
Inputs
Amount100
DirectionAdd VAT (net → gross)
B2B reverse charge appliesno
Taxable supplies this calendar year0
Computed by the engine
Rate0.09
Effective Rate0.09
Net Amount ✓ pinned100
Vat Amount ✓ pinned9
Gross Amount ✓ pinned109
Must Registerno

Every computed row comes from the engine, run on the inputs above. Rows marked ✓ pinned are also fixed by a published self-test, so a change to the model that moved them would fail its own tests.

Frequently asked questions

What is the GST rate in Singapore?

9%, in force from 1 January 2024 under section 16 of the GST Act 1993. It rose from 7% to 8% for 2023 and then to 9%, so older guidance may quote either.

How much GST is on $100?

$9.00, for $109.00 including GST. A $109.00 GST-inclusive price contains exactly $9.00 of GST.

When must I register for GST in Singapore?

Once taxable supplies exceed S$1 million in a calendar year. Unlike most countries, it is a calendar-year test rather than a rolling twelve months, so it resets each January.

Which rate applies to an invoice spanning 1 January 2024?

Both. The Act charges 8% on the part of the supply treated as taking place before 1 January 2024 and 9% on the part on or after it, so one invoice can legitimately show two rates.

Sources

Estimate. Not tax advice. The verification badge means the model reproduces the stated formula through 5 self-test cases; the sources support that the formula matches the rules.

Check the arithmetic yourself: how this calculator is verified — the formula behind every derived value, the 5 test cases the engine reproduces, and what the badge does and does not claim. Also available as machine-readable JSON.

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