For consultants

Books and GST/HST for Canadian consultants

Consulting income is lumpy and tax is owed on all of it. Bill cleanly, keep your expenses as you go, and know what to set aside before April.

No credit card needed.

A sample invoice on a phone, with 13% HST and Interac e-Transfer details

In the app today

Tax-ready all year, free

  • Recurring invoices for monthly retainers
  • PO or reference number on every invoice
  • GST/HST worked out by the client's province
  • Software, home office and travel expenses sorted by T2125 line
  • A running set-aside number for sales tax, income tax and CPP
  • Reminders before CRA instalment and filing dates

What usually goes wrong

  • Invoices rejected by accounts payable

    Missing PO numbers and registration numbers are the usual reasons. Both have their own field and print on the invoice.

  • Retainers invoiced by hand every month

    Set the invoice to recur. It goes out on schedule with its own number.

  • A big tax bill after a good year

    Consultants often owe income tax and CPP in one lump. Home shows a running amount to keep aside, so a good year doesn't turn into a bad April.

The tax reality for consultants

Most consulting services are taxable, and for services the place of supply generally follows the client's address. An Ontario consultant billing an Alberta client usually charges 5% GST, not 13% HST.

Services to clients outside Canada may be zero-rated. They still count toward the $30,000 registration limit even though no tax is charged.

If you owe more than $3,000 in income tax in a year, CRA may ask you to pay instalments. CollabNorth reminds you before each instalment date.

Coming for tax season 2027

At tax time: the Tax Ready pass

The worksheets are free to try during Early Access. The paid pass will be about $79 for sole proprietors and about $199 for corporations. It is not on sale yet. It gives you:

  • A GST/HST worksheet laid out on CRA's return lines
  • A T2125 package with your income and expenses by line
  • A receipt audit that points out what is missing before you claim

Worksheets and guides only. You file with CRA yourself.

Invoicing that does the tax for you

The CollabNorth invoice builder with Canadian tax lines calculated automatically
The invoice builder: header, items, tax and notes, review.
The customer-facing invoice page with Interac e-Transfer payment instructions
What your customer sees, with e-Transfer instructions.

Common questions

Can I put a purchase order number on the invoice?
Yes. The header has a PO or reference field, and it prints on the PDF.
How do I bill a monthly retainer?
Set the invoice to recur monthly. Each one is issued on schedule with its own number.
Can I claim my home office?
Often, yes, if you meet CRA's conditions. The help library explains how, and the business share goes on your T2125. CollabNorth doesn't work out the home office share for you yet.

General information to help you keep your own records. It is not accounting, legal or tax advice. Confirm details with the Canada Revenue Agency or your accountant.

Start your books today

Free for one owner, with no invoice limit and no card. Try the sample business first if you want to look around.