New Brunswick — am I about to cross the $30,000 GST/HST line?

Taxable supplies (including zero-rated ones like exports and basic groceries) count toward the threshold. Exempt supplies — most residential rent, most financial services, most medical/dental services — do not. If you're unsure whether a particular type of income is taxable, exempt, or zero-rated, that's a question for your accountant or for CRA's guidance pages directly.

It's always a rolling window. The "four consecutive calendar quarters" can be any four in a row — they don't need to match your fiscal year or calendar year. This is why the threshold can fire at unexpected times, especially for freelancers with seasonal revenue.

GST is the 5% federal Goods and Services Tax. HST is the Harmonized Sales Tax — a single combined rate (13% in Ontario, 15% in NB, NL, NS, PE) that bundles GST with the provincial portion. From a registration-threshold perspective the rules are identical; the difference is just the rate you collect once registered.

Maybe. Voluntary registration lets you claim input tax credits on eligible business expenses, which is worthwhile if you have meaningful taxable purchases. The trade-off: you have to start collecting tax from your clients, which can be friction in B2C work. Talk to your accountant — the math depends on your client mix and expense profile.

PST (BC, Manitoba, Saskatchewan) and QST (Quebec) are provincial-level taxes administered separately from CRA. They have their own registration thresholds and rules. This calculator covers only the federal GST/HST line — check your provincial finance ministry for the corresponding provincial threshold.

No. This is a calculator for understanding where you stand against a publicly documented CRA rule. Filing decisions — whether to register, when, voluntarily or not — belong with a CPA who knows your full picture. The math here is mechanical; the decision isn't.