Free GST/HST tools for Canadian freelancers.
Move from a foreign-client invoice to a reviewable next step. Each tool is private by design, works without an account, and keeps current official sources close to the calculation or checklist.
Twenty useful starting points.
GST/HST C$30,000 threshold tracker
Enter countable supplies, see the current quarter and four-quarter totals, and keep every row in this browser.
Open the tracker 02Canada taxCanada GST/HST/PST/QST calculator
Add or remove the current general sales taxes for all 13 provinces and territories, then compare one subtotal across Canada.
Calculate Canadian sales tax 03Service rateGST/HST place-of-supply screener
Use the CRA’s address-first general rules to screen the candidate GST/HST rate for an ordinary consulting, advisory, professional, or remote service.
Screen the service rate 04Québec taxQuébec GST/QST calculator
Add 5% GST and 9.975% QST to a subtotal or reverse a tax-included total with both tax lines visible.
Calculate GST and QST 05Quick MethodGST/HST Quick Method calculator
Estimate one federal service-business remittance with CRA’s current 5%, 13%, 14%, and 15% rate matrix and annual 1% credit.
Calculate the federal remittance 06Québec Quick MethodQuébec GST/QST Quick Method calculator
Estimate ordinary Québec remittances with the published service or qualifying resale rates and separate annual 1% reduction limits.
Estimate the remittance 07CurrencyUSD to CAD invoice converter
Fetch a Bank of Canada daily rate, convert the gross invoice, keep processor fees separate, and download an evidence note.
Convert an invoice 08InvoiceGST/HST invoice requirements checker
Use the current CRA or Revenu Québec C$100 and C$500 table, then download a seller or purchaser checklist.
Check the required fields 09Registered invoiceGST/HST invoice generator
Create a browser-local CAD invoice with a confirmed 5%, 13%, 14%, or 15% federal path or separate Québec GST/QST lines, then copy, CSV, print, or save as PDF.
Build a tax invoice 10No-tax invoiceNo GST/HST invoice template
Create a browser-local invoice for a confirmed unregistered small supplier, add a clear no-tax note, then copy, download, print, or save as PDF.
Build a no-tax invoice 11RegistryGST/HST number checker
Recognize GST/HST RT and Québec QST TQ formats privately, then open the correct official registry without placing the number in the link.
Check a number 12Registration choiceVoluntary GST/HST registration checker
Compare small-supplier status, ITC opportunity, customer price effects, filing work, and the one-year commitment with seven private questions.
Compare voluntary registration 13TimingRegistration deadline calculator
Compare the single-quarter and rolling rules, estimate the effective date, and download a private calendar reminder.
Calculate the dates 14Filing dateGST/HST filing deadline calculator
Calculate separate return and payment dates for monthly, quarterly, and annual CRA reporting paths, then save a private reminder.
Calculate filing and payment dates 15InstalmentsGST/HST instalment calculator
Apply the separate C$3,000 tests, compare previous-year and current-estimate methods, build four dates, and optionally calculate Québec QST separately.
Build the instalment schedule 16Late filingGST/HST late-filing penalty calculator
Apply the CRA 1% base plus 0.25% per complete month, capped at 12 months, while keeping changing interest and other penalties separate.
Estimate the filing penalty 17Late paymentGST/HST arrears-interest calculator
Estimate daily-compounded interest on one unchanged CRA balance across five verified 7% quarters, with a transparent period breakdown.
Estimate arrears interest 18Return linesGST/HST return calculator
Estimate regular-method lines 101 through 115, keep entered and calculated amounts separate, and export a private CRA-style worksheet.
Calculate the return lines 19ReviewGST/HST adviser handoff builder
Choose broad review topics and download a focused question-and-evidence brief without entering names or invoice amounts.
Build an adviser brief 20FitThirty North product finder
Answer a few workflow questions and see whether the C$19 kit, C$29 workspace, C$39 bundle, or no purchase fits.
Find the right fitUse the public tools first.
If they resolve the question, stop there. If you need a repeatable record, compare the paid files only after you know which job the product must do.