Input Tax Credits Explained

Explainers, Tax & Financial Discipline

Input Tax Credits Explained

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Read time: 3 minutes

Where this fits: This explainer supports the Tax & Financial Discipline guide path.
Updated on: April 24, 2026

Input tax credits are one reason GST/HST records need to be clearer than ordinary expense tracking.

Once you are registered for GST/HST, you may be able to recover GST/HST paid on eligible business purchases. These recoveries are called input tax credits, or ITCs.

The basic idea is simple: you collect GST/HST from customers, but you may also pay GST/HST on business expenses. Your GST/HST return compares those two sides. If the GST/HST collected is higher than the eligible credits, you may have an amount to remit. If eligible credits are higher, you may have a refund position.

The basic idea

An input tax credit is not the same thing as an income tax deduction.

  • An income tax deduction reduces business profit. An ITC reduces the GST/HST amount you owe, or increases the refund you may be entitled to, depending on the numbers.
  • For example, if you buy supplies for the business and GST/HST is charged on the purchase, the GST/HST portion may be recoverable if the purchase is eligible, connected to commercial activity, and properly supported.

That is why receipts matter. A bank or credit card statement may show that money was spent, but it usually does not show enough detail to confirm what was purchased, whether GST/HST was charged, or whether the expense supports an ITC claim.

Why ITCs matter

Without ITCs, GST/HST can feel like a one-way obligation: you charge tax, collect it, and send it to CRA.

ITCs complete the picture. They recognize that a registered business often pays GST/HST on its own inputs, such as supplies, software, advertising, professional fees, equipment, or other operating costs.

When those expenses are eligible and properly supported, the GST/HST paid can reduce the net GST/HST amount owing.

This is also why weak records create problems. If receipts are missing, mixed with personal purchases, or unclear, the GST/HST paid may be harder to support. The issue is not only whether money was spent. The issue is whether the GST/HST portion can be identified, explained, and reviewed.

What you need to track

At a basic level, you need to know:

  • what GST/HST you charged customers
  • what GST/HST you collected
  • what GST/HST you paid on eligible business expenses
  • which expenses were partly personal
  • which receipts or invoices support the GST/HST paid
  • which reporting period the amounts belong to

You do not need a complicated system to start. But you do need a recordkeeping habit that separates the tax portion from the total purchase.

For example, a $113 purchase in Ontario may include a $100 expense and $13 of HST. For income tax purposes, the business cares about the expense. For GST/HST purposes, the business also needs to track the HST paid.

Common mistakes

  1. One common mistake is assuming every receipt creates an ITC. It does not. The expense must be connected to the business, the GST/HST must be eligible, and the support must be clear.
  2. Another mistake is relying only on bank or credit card statements. Statements are useful for confirming payment, but they usually do not show enough detail to support the GST/HST paid.
  3. A third mistake is ignoring small receipts. Small amounts may not feel important one at a time, but over the year they can affect the GST/HST position and the quality of your records.

If you use the Quick Method, ITCs may also work differently. The Quick Method simplifies the remittance calculation, but it does not mean every GST/HST amount works the same way as under the Regular Method. This is a good area to confirm before filing.

How this appears in the workbook

In the full sole proprietor workbook, input tax credits appear in the GST/HST — Tracking & Reconciliation view. That view helps summarize:

  • GST/HST collected from income
  • GST/HST paid on eligible expenses
  • the estimated net GST/HST position
  • Regular Method reference amounts
  • Quick Method planning comparison, if applicable
  • GST/HST return reference lines for review

The workbook uses the transactions and GST/HST amounts entered throughout the year. If the underlying income, expense, adjustment, or source document entries are wrong, the GST/HST summary will also be wrong.

The workbook is designed to make ITCs visible before filing time. It helps with tracking, planning, reconciliation, and review. It does not replace CRA filing, tax software, or professional validation.

What to do next

If you are registered for GST/HST, start saving receipts and invoices in a way that makes the GST/HST amount visible. During your monthly review, separate:

  • total purchase amount
  • GST/HST paid
  • business-use portion, if applicable
  • receipt or invoice support
  • source document reference

The goal is not to become a GST/HST expert. The goal is to make sure GST/HST paid on business expenses can be reviewed, supported, and used properly when your return is prepared.

Educational not: This explainer is educational only. It is not legal, tax, or accounting advice. GST/HST rules can depend on your registration status, expense type, business use, reporting method, province, and specific facts. Speak with a qualified professional about your situation.