"Do I charge tax on this invoice?" has no universal answer — it depends on what you sell, where you and your client are located, and rules that are genuinely jurisdiction-specific. This isn't tax advice, but it will tell you which questions actually determine the answer, so a conversation with an accountant is fast instead of open-ended.
The questions that actually matter
- What are you selling? Many places tax goods and physical products differently from services — and some services (digital products, software, consulting) have their own separate rules again.
- Where is your client located? Selling within your own state/country usually follows one rule set; selling across a state or national border often triggers a completely different one (sometimes no tax at all, sometimes the client self-assesses it instead).
- Are you above a registration threshold? Many jurisdictions only require you to register for and charge sales tax once your revenue crosses a specific threshold — below it, you may not be permitted to charge tax even if you wanted to.
- Is your client a business or an individual? B2B and B2C transactions are frequently taxed differently, especially internationally.
If the answer is "yes, charge tax"
Show it as its own clearly labeled line — "Tax (8.25%)" — calculated on the taxable subtotal, never silently folded into your rate. A client who can see the tax calculated transparently is far less likely to question it than one who just sees a total that's higher than they expected.
If the answer is "no, don't charge tax"
Some freelancers add a tax line out of habit or caution even when it isn't required — this can be just as much of a problem as forgetting a required tax, since collecting tax you're not registered to collect creates its own compliance issue. If you're not sure, the safe default is: don't add tax until you've confirmed you're supposed to, since removing an unnecessary line is a lot easier than explaining an incorrect one after the fact.
Getting the actual answer
A single conversation with an accountant familiar with your situation — what you sell, where your clients are — will settle this definitively and stay valid until your business changes meaningfully (new state, new country of clients, crossing a revenue threshold). That's a much better investment than guessing invoice by invoice.
This article explains the shape of the problem, not the answer for your specific situation — tax rules vary by jurisdiction and change over time. Treat it as a list of questions to bring to a qualified accountant, not a substitute for one.