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Input tax credits are how a GST/HST registrant gets back the GST or HST it paid on business purchases. If you paid $1,040 of HST on $8,000 of equipment in Ontario, and the equipment is for your business, you can claim that $1,040 on line 106 of your GST/HST return.
How do input tax credits work?
You charge GST/HST on your sales and pay it on your costs. The ITC lets you subtract the tax you paid from the tax you collected, so you send the CRA only the difference. If you paid more than you collected, the CRA owes you the balance.
Take a registered Ontario business that sells $20,000 of taxable goods in a quarter and buys $8,000 of supplies. It collects $2,600 of HST and paid $1,040. It remits $1,560. Without the credit it would remit the full $2,600, which is why missing receipts cost real money.
The GST/HST calculator gives the tax on any price in your province, and the HST reverse calculator pulls the tax out of a receipt total when the receipt doesn’t break it down.
Who can claim an input tax credit?
You must be registered for GST/HST when the tax was paid, and the purchase must be for your commercial activities. Registration is required once your taxable revenues pass $30,000 in a single calendar quarter or over four calendar quarters in a row, and some businesses register earlier by choice to start claiming.
That’s a real reason to register voluntarily. A new business spending heavily on equipment and inventory can be owed money from day one, but only if it’s registered.
What can’t you claim?
The CRA lists several exclusions, and they come up more often than people expect.
| Purchase | Can you claim the GST/HST? |
|---|---|
| Supplies for your taxable business sales | Yes |
| Personal use or enjoyment | No |
| Dues for a club whose main purpose is recreation, dining or sports | No |
| Supplies used to make exempt sales | No |
| Meals and entertainment | Only the allowable part |
| Some capital property | Restricted |
We couldn’t confirm the exact meals percentage on the page we read, so check the CRA’s meals and entertainment rules before you claim. Mixed-use items are the everyday trap. A phone or a vehicle you use half for work supports only the business share.
What proof do you need for an ITC?
The CRA sets documents by purchase size.
| Purchase | What the receipt must show |
|---|---|
| Under $100 | Supplier name, date, total amount |
| $100 to $499.99 | The above, plus the GST/HST paid or a statement that it’s included, and the supplier’s registration number |
| $500 or more | The above, plus your name, a description of what you bought and the payment terms |
You don’t send receipts in with an electronic return, but you must have them if the CRA asks. Records are kept for 6 years from the end of the year they relate to. Build that file as you go, since hunting for a receipt three years later is miserable.
How long do you have to claim?
Most registrants have four years. The deadline is the due date of the return for the last reporting period that ends within four years after the period when the credit could first be claimed. Listed financial institutions and businesses over a $6 million threshold have two years, with exceptions for charities.
Four years is generous, but don’t count on it. The more time between purchase and claim, the harder the paper trail is to rebuild, and a supplier can close in the meantime.
Mistakes that cost people money
The common ones are claiming personal spending, claiming from a supplier who isn’t registered, and forgetting to claim at all. Another is treating provincial sales tax like GST/HST. Our GST and PST calculator shows both taxes on a price, but the ITC as described here covers the GST/HST only, so check the provincial rules on PST separately. Also note that the BC setting in that tool applies 12% to everything, so it overstates tax on items that carry less.
If your business also owes payroll amounts, the payroll remittance calculator covers those, since they don’t have anything to do with ITCs.
Where do these numbers come from?
The credit rules, documentation levels, time limits and six-year record period come from CRA pages on input tax credits and GST/HST records. The HST rate for Ontario comes from the CRA’s rate table. We rechecked them on 29 September 2026. This website has no connection with the CRA.
Frequently asked questions
What is an input tax credit?
It's a credit that lets a GST/HST registrant recover the GST/HST paid on purchases for commercial activities. You claim it on line 106 of the return.
Can I claim GST/HST on personal purchases?
No. Personal consumption or enjoyment is excluded, and so are dues for clubs mainly for recreation, dining or sports.
How long do I have to claim an ITC?
Four years for most registrants. Listed financial institutions and businesses over a $6 million threshold generally have two.
What receipt do I need for a $600 purchase?
It needs the supplier's name, the date, the total, the GST/HST detail and registration number, your name, a description and the payment terms.
How long should I keep GST/HST records?
Six years from the end of the year they relate to, though the CRA may ask you to keep some longer.
- Canadian tax credits and government benefits explained
The difference between tax credits and benefits in Canada, how they're worked out from your return, and the calculators for the ones people claim most
Information only. This page is general information, not tax, legal or accounting advice. Tax-Services.ca is an independent publisher: we don't prepare or file tax returns or offer tax services, and we have no connection with the CRA, Revenu Québec, any government or any company named on this page. Check the figures that matter with an official source or a qualified professional.