Malaysia Tax Guide
This guide shows how to estimate SST arithmetic in Malaysia, including how to add SST to an amount before SST and how to remove SST from a total that already includes SST.
Important note
This guide is for SST arithmetic and learning only. It does not decide whether SST applies, which SST rate is legally correct, or what invoice/tax treatment a business must use.
SST rules, rates, exemptions, and taxable scope can change. Check official MySST guidance from RMCD or ask a qualified tax professional before relying on the result.
Quick answer
To add SST, multiply the amount before SST by the SST rate, then add the SST amount to the original amount.
To remove SST, divide the total including SST by 1 plus the SST rate, then subtract the amount before SST from the total.
Use the calculator only after you already know the amount and rate to test.
Key terms
| Term | Meaning | Simple example |
|---|---|---|
| Amount Before SST | Price before SST is added | RM 100 |
| SST Rate | Percentage rate selected for calculation | 8% |
| SST Amount | Amount of SST estimated from the rate | RM 8 |
| Total Including SST | Amount before SST plus SST amount | RM 108 |
| Remove SST | Work backward from an SST-inclusive total | RM 108 back to RM 100 before SST |
Add SST
SST Amount = Amount Before SST x SST Rate
Total Including SST = Amount Before SST + SST Amount
Amount before SST: RM 100
SST rate: 8%
SST amount: RM 100 x 8% = RM 8
Total including SST: RM 100 + RM 8 = RM 108
| Item | Amount |
|---|---|
| Amount before SST | RM 100 |
| SST rate | 8% |
| SST amount | RM 8 |
| Total including SST | RM 108 |
Remove SST
Amount Before SST = Total Including SST / (1 + SST Rate)
SST Amount = Total Including SST - Amount Before SST
Total including SST: RM 108
SST rate: 8%
Amount before SST: RM 108 / 1.08 = RM 100
SST amount: RM 108 - RM 100 = RM 8
| Item | Amount |
|---|---|
| Total including SST | RM 108 |
| SST rate | 8% |
| Amount before SST | RM 100 |
| SST amount | RM 8 |
Modes
Use Add SST when your price does not include SST yet. Use Remove SST when the price already includes SST and you want to estimate the pre-SST amount.
| Situation | Use this mode | Example |
|---|---|---|
| You have a price before SST | Add SST | RM 100 before SST becomes RM 108 at 8% |
| You have a price that already includes SST | Remove SST | RM 108 including SST becomes RM 100 before SST at 8% |
Rates
SST rates and taxable scope depend on the type of goods or services and official rules.
The calculator may include common rate options such as 0%, 5%, 6%, 8%, 10%, or a custom rate for arithmetic.
The presence of a rate in the calculator does not mean it applies to your product or service. Check official RMCD/MySST guidance or a qualified tax professional for the correct treatment.
| Calculator Rate Option | Why it may appear | Important reminder |
|---|---|---|
| 0% | Useful for zero-rate or no-tax arithmetic checks | Does not prove an item is zero-rated |
| 5% | Common rate option for some SST calculations | Check official treatment |
| 6% | Common service tax rate option for some categories | Check official treatment |
| 8% | Common service tax rate option for some taxable services | Check official treatment |
| 10% | Common sales tax rate option for some goods | Check official treatment |
| Custom | Useful for arithmetic testing when a rate is known | Only use if you know the correct rate |
Calculator steps
Invoices
Some invoices may show an amount before SST, SST amount, and total including SST. This depends on the business, registration status, goods/services, and tax rules.
The simple Invoice Generator does not replace tax-compliant invoicing advice.
You can create a simple invoice preview and learn how to create a simple invoice.
Cash flow
SST on an invoice is not the same as profit.
Invoice totals and cash received may happen at different times.
You can learn the difference between cash flow and profit or calculate simple cash flow.
Tools
Common mistakes
Checklist
FAQ
SST commonly refers to Sales and Service Tax in Malaysia. This guide only explains arithmetic and does not decide whether SST applies.
Multiply the amount before SST by the SST rate to estimate the SST amount, then add it to the original amount.
Divide the total including SST by 1 plus the SST rate, then subtract the amount before SST from the total.
When adding SST, SST Amount = Amount Before SST x SST Rate.
Amount before SST is the price before the estimated SST amount is added.
Total including SST is the amount before SST plus the estimated SST amount.
Use only a rate you have confirmed from official RMCD/MySST guidance or a qualified tax professional.
No. It only performs arithmetic based on the amount and rate entered.
It can help estimate SST arithmetic for invoice examples, but it does not confirm tax treatment or invoice compliance.
No. SST and income tax are different and should not be treated as the same calculation.
Yes. It can help with arithmetic practice and estimates, but it is not professional tax, legal, accounting, or financial advice.
