If you run a service business in Malaysia—consulting, design, accounting, cleaning, repairs, coaching—SST (Service and Sales Tax) affects your invoices and your bottom line. Yet many service owners either ignore it until the tax office knocks, or overcomplicate it and overpay. This walkthrough is written for the person running the business, not an accountant. What is SST and who needs to register? SST is a 6% tax on services and goods sold in Malaysia. It replaced GST in 2018 and applies to both products and services. For service businesses, it's straightforward in principle: if you cross the registration threshold, you charge SST on your invoices and pay it to the Royal Malaysian Customs Department (RMCD). Registration threshold: You must register for SST when your annual turnover reaches RM500,000 in a 12-month period. This is a legal requirement, not optional. If you hit that threshold and don't register, you're exposed to penalties and back-tax claims. Many service businesses don't realise they've crossed the threshold until they're audited. Track your monthly revenue consistently to know where you stand. The threshold is subject to change. RMCD adjusts it periodically, so confirm the current rate on their official website before assuming your situation hasn't changed. Which services are actually taxable? Not all services are equal under SST. Some are exempt, some are partially taxed, and some carry the full 6%. This is where many business owners get confused. Services subject to 6% SST: Professional services: consulting, engineering, design, accounting advice Repair and maintenance services Installation and assembly services Cleaning and sanitation services Transportation and logistics services Advertising and marketing services IT and software services Training and educational services (if you're a private institution) Services that are exempt (no SST): Financial and banking services Insurance services Healthcare and medical services Education (schools and universities regulated by MOE) Local transport (taxis, buses) Rental of residential property If your business spans both taxable and exempt services, you need to separate them on your invoice. You can't blend them and call it one line item. The mixed-service trap A common mistake: a cleaning company that also sells cleaning supplies. The labour is taxable; the goods sold may be exempt or taxed differently depending on the product. If you invoice both on one line, the tax office will query it. Split them, and you're compliant. How to show SST on your invoices Once you're registered, SST must appear on every invoice you issue. The format matters because it feeds into MyInvois (Malaysia's e-invoicing mandate for registered businesses) and into your monthly SST return to RMCD. Your invoice must show: Your SST registration number (issued by RMCD when you register) A clear line item for the service or product, with a description The price before SST (subtotal) SST amount (6% of the taxable subtotal) Total amount payable (subtotal + SST) Example: Consulting services: RM1,000 SST (6%): RM60 Total: RM1,060 That's it. No hidden taxes, no footnotes that confuse the issue. Clear separation helps you and the customer. Invoicing software and SST automation Manual invoicing is error-prone when SST is involved, especially if you're issuing dozens per month. Invoicing software that understands Malaysian tax rules can save hours and reduce mistakes. Look for a platform that lets you configure SST automatically, separates exempt and taxable services, and exports data in a format RMCD accepts. A unified platform that handles both invoicing and accounting means SST gets recorded correctly in your books from day one, which makes your monthly return and annual reconciliation much simpler. Common SST mistakes (and how to avoid them) 1. Charging SST on exempt services You invoice a client for financial advisory work at RM2,000 and add 6% SST. You shouldn't. Financial advice is exempt. This overcharge erodes trust and creates a compliance mess when you file your return. RMCD will notice the discrepancy. 2. Forgetting to include your SST registration number Without it, the invoice isn't technically compliant. Some clients will reject it for their own accounting purposes. Always include it. 3. Mixing taxable and exempt services without splitting them If you provide both consulting (taxable) and training under a government contract (exempt), you must separate them on the invoice. Lumping them together invites audit questions and penalties. 4. Not registering when you hit the threshold The most serious mistake. Once you cross RM500,000 annual turnover, you are legally required to register. Not doing so makes you liable for back-tax, penalties, and interest. Register as soon as you know you'll hit the threshold; don't wait until you've already exceeded it. 5. Charging SST to clients outside Malaysia If you're providing services to a non-resident client outside Malaysia (even if t