Self-Employed in Québec? Your Instalment Threshold Is $1,800, Not $3,000 (2026)

Almost every Canadian tax guide tells you instalments start at $3,000 of net tax owing. If you live in Québec, that number is wrong for you — your threshold is $1,800, and it is $1,800 twice. Federally: you must pay 2026 instalments if your net tax owing is more than $1,800 for 2026 and in either 2025 or 2024 — the $3,000 figure applies to every province except Québec (Canada Revenue Agency). Provincially: Revenu Québec requires instalments if your estimated net income tax payable for the current year is over $1,800 and was over $1,800 in either of the two previous years (Revenu Québec). Two systems, two reminders, one lower bar. Here is how it actually works.

Why Québec’s federal threshold is lower

It is not a penalty — it is proportion. Everywhere else, the CRA collects federal and provincial income tax on one return, so the $3,000 test runs against the combined bill. Québec collects its own income tax through its own return, which leaves your CRA balance carrying only the federal share — a smaller number for identical income. The $1,800 line keeps the instalment trigger roughly equivalent. The practical effect, though, is real: a Québec freelancer with a $2,400 federal net tax owing is required to pay CRA instalments, while a freelancer in any other province with the same $2,400 would not be.

The two tests, side by side

	CRA (federal)	Revenu Québec
Threshold	Net tax owing over $1,800	Net income tax payable over $1,800
Years tested	2026 and 2025 or 2024	Current year and either of the two previous years
What the payments cover	Federal income tax (plus CPP-replacing amounts don’t apply — QPP is provincial)	Québec income tax + QPP + health services fund + QPIP + drug insurance plan premium
Who writes to you	CRA instalment reminders	Revenu Québec instalment notices

Both parts of each test must be true. And a reminder is not a requirement: if you received a CRA reminder but your 2026 net tax owing will be $1,800 or less, you do not have to pay federal instalments for 2026 (Canada Revenue Agency). Estimate first, pay second — the CRA instalment calculator takes about a minute, and why an instalment reminder is not a bill is the calmer framing if the envelope raised your pulse.

The Québec instalment is bigger than it looks

On the Revenu Québec side, the quarterly payment is not just income tax. Instalment payments cover your income tax for the year and, where applicable, your Québec Pension Plan contribution, your contribution to the health services fund, your Québec parental insurance plan premium, and your premium under the Québec prescription drug insurance plan (Revenu Québec). For the self-employed, the QPP slice dominates: the 2026 QPP rate is 10.6% base plus 2% first additional — 12.6% total, both halves — on earnings up to $74,600, with a second additional contribution of 8% between $74,600 and $85,000 (Revenu Québec). For a Montréal freelancer netting $60,000, the QPP piece alone runs to several thousand dollars a year — 12.6% of pensionable earnings — before Québec income tax is counted, all of it flowing through those quarterly notices. (Rest-of-Canada readers: the federal equivalent is CPP at 11.9%, and it has its own 2026 guide.)

Living with two instalment systems

The double-reminder year usually starts the same way: your first profitable year gets assessed, both systems notice, and two envelopes arrive within weeks of each other. The calm sequence is the same one that works federally, run twice. Check each test against your own current-year estimate. Pick amounts — the reminder’s figures are the zero-interest-risk option on the federal side; estimating your own shrinks payments when income drops but puts the estimate risk on you. Schedule everything at once so no date lives in your head. And if the CRA reminder is your first ever and asks for 75% of the year on September 15 — that is the normal first-reminder split, explained in your first CRA instalment reminder.

The deeper fix is upstream: set aside a slice of every invoice as it is paid, sized for Québec reality — federal tax, Québec tax, and 12.6% QPP together. Our guide to how much tax to set aside covers the arithmetic, and VRITTI applies the Québec-specific thresholds automatically — including the $1,800 line most apps miss.

For the full picture beyond instalments — HST/QST registration, T2125 filing, deadlines — see our self-employed taxes in Canada pillar guide. And if your bookkeeping app doesn't already know Québec's $1,800 threshold is different from the rest of Canada, it's worth a look at our comparison of the best bookkeeping apps for Canadian freelancers.

Sources

• CRA — Who has to pay tax instalments (the $1,800 Québec threshold beside the $3,000 general one; the two-part year test; reminder-but-under-threshold rule)
• Revenu Québec — Instalment payments (the $1,800 two-year test; what instalments cover: income tax, QPP, health services fund, QPIP, prescription drug plan; farmers-and-fishers variant)
• Revenu Québec — QPP contribution payable by a self-employed person (2026: 10.6% + 2% rates, 8% second additional, $74,600 / $85,000 ceilings)

This article explains CRA and Revenu Québec rules in plain language. It is general information, not tax advice for your situation — every figure above was verified against the government pages listed on 24 August 2026. Rules and thresholds change; check the current page before relying on a number.