A set of calculators and generators built for how things actually work in Quebec: the right rates, the right rounding rules, and the mentions Revenu Québec expects. They all run in your browser — no signup, no data leaving your device.
Sales taxes
The GST/QST sales tax calculator adds the taxes to a pre-tax amount, and the reverse sales tax calculator works backwards from a total. If you are wondering whether you have to collect taxes at all, the $30,000 threshold tool answers from your last four quarters.
Business documents
The invoice generator produces an invoice that meets Quebec requirements, with GST and QST registration numbers and two separate tax lines. The estimate generator applies the same approach to your price offers, with a validity date and terms and conditions.
Expenses and payroll
The mileage calculator applies the current year’s rates with the 5,000 km tier, and the vacation pay calculator sorts out 4% versus 6% based on years of continuous service.
Why these tools are free
We build InnoBooks for self-employed workers and small businesses in Quebec. These tools settle a one-off calculation; the software handles what comes after — taxes collected across the year, unpaid invoices, expenses filed where they belong. If the tools are useful to you, there is a good chance the rest will be too.
None of these tools asks for an account, and nothing you type leaves your browser.