Free Tax Calculators for Your Website

Give your readers and clients an accurate Canadian tax calculator without building one. Copy, paste, done. Free, no signup, and always up to date.

GST/HST Calculator

Adds or removes GST, HST, PST or QST for all 13 provinces and territories, and shows the federal and provincial split. Popular with bookkeepers, accountants, small-business blogs and online sellers.

Embed code

<iframe src="https://www.mytaxcalculator.ca/embed/gst-hst-calculator" title="GST/HST Calculator" width="100%" height="480" style="border:0;max-width:640px;" loading="lazy"></iframe>
<p style="font-size:13px;margin:4px 0 0;"><a href="https://www.mytaxcalculator.ca/calculators/gst-hst-calculator">GST/HST Calculator</a> by <a href="https://www.mytaxcalculator.ca/">MyTaxCalculator.ca</a></p>

Open the full calculator

How to Add It

Click Copy embed code above.
In your site editor, add an HTML block: Custom HTML in WordPress, Custom Liquid in Shopify, Code in Squarespace, or Embed HTML in Wix.
Paste the code and publish. The calculator resizes to fit your page width.

More calculators (income tax, salary after tax, RRSP) are coming soon. Want a specific one? Email us from the About page.

Frequently Asked Questions

Is it really free?

Yes. There's no signup, no cost and no ads inside the widget. We only ask that you keep the short credit link under the calculator.

Will it slow down my site?

No. The widget loads lazily in its own frame and only starts loading when a visitor scrolls near it.

Do I need to update it when tax rates change?

No. The calculator is served from MyTaxCalculator.ca, so rate changes (like Nova Scotia's HST cut to 14%) show up on your site automatically.

Does it work on WordPress, Shopify, Squarespace and Wix?

Yes. Paste the code into a Custom HTML block (WordPress), a Custom Liquid or HTML section (Shopify), a Code block (Squarespace) or an Embed HTML element (Wix).