Report a loss you had from a business investment (T4037 or TP-232.1-V)

If you’re reporting a business investment loss this year, you might be able to claim it and use it to reduce your taxable income. Generally, you can deduct 50% of the amount of the loss from your income. This amount is called the Allowable Business Investment Loss (ABIL).

You can claim a deduction for your loss if it was the result of:

  • selling shares in a small business corporation (whether the sale actually took place or if the shares were just considered to be sold)
  • a debt a small business corporation owes you

Under certain circumstances, you might also have a business loss if you are deemed to have disposed of, for zero proceeds, a debt or a share of a small business corporation. Refer to the Canada Revenue Agency (CRA) website for more information.

Note: Be sure to keep details on the disposition on file in case the CRA asks to see them later. Include information such as what was disposed of and why, original purchase date, proceeds of disposition, adjusted cost base (ACB), and outlays and expenses.

Chart 6 of form T4037: Capital Gains is used to calculate your ABIL for federal tax purposes. If you’re a resident of Québec, you’ll also use form TP-232.1-V to calculate the amount for your provincial return.

If your ABIL is greater than your income, you can apply the excess amount to another year. Unused amounts can reduce your income for the past 3 years or be carried forward for up to 10 years.