Singapore Reverse GST Calculator
Singapore GST is 9% on most taxable goods and services. Divide S$ totals by 1.09 for the amount excluding GST on receipts and platform payouts.
Enter the total you paid (GST included) and your rate.
Step 2 — Your breakdown
We reverse the tax using the standard formula:
Enter a total and tax rate to see your breakdown.
Rate increased from 8% to 9% in recent years—use the rate printed on your invoice for the supply date. S$109 ≈ S$100 ex-GST + S$9 GST.
Zero-rated exports and exempt financial services are out of scope on many B2B lines.
Orchard Road retail and Jurong industrial suppliers both need rate-matched divisors—verify 8% on pre-2024 invoices versus 9% on current supplies.
Multinationals in Singapore reverse GST on tax-inclusive local vendor bills for management reporting in USD or SGD net bases.
CBD law firms and fintech startups reverse GST on tax-inclusive SaaS and office supply receipts before intercompany recharge at ex-GST amounts.
IRAS GST returns require ex-GST and GST to match tax invoices. Reverse GST on tax-inclusive vendor bills before input tax claims on mixed exempt financial and 9% taxable lines.
Shopee, Lazada, and Qoo10 gross SGD settlements need per-order rate attribution by supply date—never assume 9% on rows from periods when 8% still applied.
Ex-GST = inclusive ÷ 1.09 at current standard rate.
Overseas Vendor Registration rules may shift collection to platforms—reverse using the GST rate shown on your consumer receipt, not the seller's home country divisor.
Shopee and Lazada sellers in Singapore should reverse GST on tax-inclusive SGD gross at 9% or 8% by supply date before IRAS quarterly return filing.
| Rate | Category | Examples |
|---|---|---|
| 9% GST | GST | Singapore goods and services tax. |
| Varies | Sector exceptions | Financial services, healthcare, and exports may use different treatment. |
S$109 at 9% GST.
Ex-GST S$100 | GST S$9
GST registration and filing when thresholds met. Confirm rate for supply date. IRAS filers should archive invoices showing 8% vs 9% by supply period for input tax reconciliation.
9% standard on most taxable supplies (verify supply date).
About S$100 ex-GST at 9%.
May be exempt or zero-rated supply.
Malaysia uses SST, not Singapore GST.
Use 8% divisor on supplies before the 9% rate increase—check supply date on invoice.
Reverse 9% or 8% GST per order from inclusive SGD gross before IRAS filing.
