HST in Ontario 2026: A 7-Minute Guide for Markham Businesses

Page summary

Avoid HST mistakes that cost Markham businesses thousands. See the $30K threshold, how to claim input tax credits, the Quick Method, and your filing frequency.

• Article details: Tax Tips; published May 10, 2026; 9 min read.
• HST in Ontario: A Plain-Language Guide for Markham Business Owners
• HST shows up on every invoice and every receipt, yet most Markham business owners have never had it properly explained — not the CRA pamphlet version, the real version. Whether you are a sole proprietor approaching $30,000 in revenue, wondering whether the Quick Method saves money, or staring at a CRA notice, this guide is that conversation.
• For situation-specific advice, ARMalik's Markham accounting team handles HST registrations, elections, and returns for businesses across York Region.
• If your revenue is approaching $30,000, you have an HST letter you do not understand, or you want to know whether the Quick Method still works for you, get in touch. The HST calculator on our site lets you model your remittance or compare methods before your next return.
• ARMalik Professional Corporation — Markham CPAs serving businesses across York Region.

Related pages

• Blog: Browse more Canadian tax and accounting articles.
• Tax Planning & Advisory: Get advice before tax decisions become filing problems.
• Contact ARMalik: Ask a Markham CPA about how this topic applies to your situation.

Contact