Guides
What Must a Canadian Locksmith Service Call Invoice Include?
Canadian locksmith service call invoice requirements include CRA fields, HST/GST, and Quebec QST. Service call receipts need a tax breakdown or credits denied.
What to take away
- A Canadian locksmith service call invoice is a tax record governed by CRA GST/HST invoicing rules and, in Quebec, by Revenu Quebec QST rules.
- The invoice must show the supplier's business name, the GST/HST registration number, the invoice date, the buyer's name, a service description, the total amount, and the GST/HST tax treatment.
- Registered locksmiths charge GST/HST on labour, parts, and after-hours fees.
- Missing a required field can cause CRA to deny the customer's input tax credit and can result in a penalty for the supplier.
Canadian locksmith service call invoice requirements start with the Canada Revenue Agency. A locksmith service call invoice in Canada is not a simple receipt. Quebec adds QST invoice rules through Revenu Quebec. A private property management contract can require extra identifiers.
Who has jurisdiction over Canadian locksmith invoices
Federal GST/HST rules apply across Canada. Quebec adds provincial QST invoice rules. Municipal licensing rules do not change the invoice fields. Private contracts, such as a property management agreement, can add purchase order numbers. In Canada, provincial rules occupy the role that state rules do in other countries. The CRA GST/HST for businesses page sets the minimum fields for service call invoices.
Invoice rules by jurisdiction
Federal GST/HST
- Invoice fields
- Sets minimum fields
- Registration
- Required if registered
- Private contracts
- Can add PO numbers
Quebec QST
- Invoice fields
- Adds QST fields
- Registration
- Separate QST number
- Private contracts
- Can add PO numbers
Municipal licensing
- Invoice fields
- Does not change
- Registration
- Licensing only
- Private contracts
- No invoice effect
A locksmith business with taxable sales of $30,000 or less over four consecutive calendar quarters is a small supplier and is not required to register for GST/HST. In Quebec, the small supplier threshold for QST is $50,000. If registered, it must collect and remit tax on every taxable service call. Once registered, voluntary registration means the invoicing rules apply.
The small supplier threshold is based on worldwide taxable sales, not just locksmith work. This matters when a side business grows past the threshold mid-year. The Harmonized Sales Tax combines GST with provincial sales tax in participating provinces, while others charge GST plus provincial sales tax.
What triggers the invoice obligation
A taxable supply of locksmith services triggers the obligation to issue an invoice when a GST/HST registrant makes a service call in Canada. A lockout, rekey, key duplication, or hardware installation is a taxable supply.
When a locksmith invoice is required
- Taxable supply made in Canada
- Registrant makes a service call
- Lockout, rekey, key duplication
- Hardware installation
- Emergency call or scheduled rekey
- Mailbox lock change
- Buyer requests an invoice
The buyer does not need to ask before the work starts, but a registrant must issue an invoice on request for any taxable supply. Under the CRA simplified invoice rule, a supply under $30 may be invoiced without the buyer's name and without the GST/HST registration number, and in Quebec without the QST registration number.
Pairing the invoice with a locksmith service call notes template helps prove the service date and work done.
What to submit on a service call invoice
Required service call invoice fields
- Supplier business name
- Invoice date
- Buyer name
- Service description
- Total amount before tax
- GST/HST tax treatment
- QuebecQST shown separately
| Field | CRA requirement | Quebec note |
|---|---|---|
| Supplier business name | Legal or trading name on the GST/HST account | Same |
| GST/HST registration number | Required on a supply of $30 or more; may be left off below $30 | Add the QST registration number |
| Invoice date | Date of issue or service call | Same |
| Buyer name | Needed above the simplified threshold | Same |
| Service description | Specific, such as rekey two cylinders on front door | Same |
| Total amount | Amount paid or payable before tax | Amount before QST |
| GST/HST tax treatment | Rate or amount, or a statement that tax is included | Show QST separately |
A property manager may require a work order number on the invoice. That is a private rule, not a CRA rule.
A service call receipt in Canada must show the same CRA fields unless the supply is under $30. Travel charges, after-hours surcharges, and parts are part of the taxable supply. They must appear in the total amount or as separate lines before tax.
A vague description such as 'service' will not satisfy a commercial customer. A clear line item such as 'rekey two cylinders on front door' works better. Quebec invoices must show QST separately, not combined with GST. For property management work, a commercial locksmith service call checklist supports the service description line.
How long approval and retention take
No CRA approval is required for an individual invoice. You keep a copy on file, but you do not send every invoice to Ottawa. Retention lasts six years from the end of the last tax year to which the records relate. Revenu Quebec applies the same retention period. During an audit, the invoice must support the tax collected and the service provided. A locksmith service call script for lockouts can record the customer's verbal approval before work starts, which supports the invoice date.
Invoice retention and approval timeline
- Service callInvoice issued, no CRA approval
- Tax year endSix-year retention period starts
- Six years laterRetention period ends
- During auditInvoice must support tax and service
Electronic invoices are acceptable if they contain the required fields and you can print them on request. CRA does not require a specific format. The six-year retention period starts after the tax year ends, not on the invoice date. If you use accounting software, keep a backup outside the software in case the vendor closes.
What happens if you skip a required invoice field
If you omit the GST/HST registration number when it is required, the customer's input tax credit can be denied. Subsection 169(4) of the Excise Tax Act allows an input tax credit only where the registrant has sufficient evidence to support the claim. The prescribed details come from the Input Tax Credit Information (GST/HST) Regulations. A supplier that fails to charge or remit tax on a service call can be assessed a penalty under section 162 of the Excise Tax Act, plus interest. In Quebec, missing QST fields can trigger a Revenu Quebec assessment under the Act respecting the Quebec sales tax. A property manager may refuse payment until the invoice matches the work order.
Missing invoice field consequences
Is a required invoice field missing?
CRA may deny input tax credit
Yes -> Supplier may be assessed
A corrected invoice can fix mistakes, but mark it clearly as a replacement. Keep the original; do not destroy it. For a commercial landlord, a missing buyer name on an invoice of $30 or more can block an input tax credit claim. That is a concrete compliance risk, not a formatting preference.
Show after-hours surcharges on the invoice so the tax treatment is clear. The after-hours locksmith service calls guide explains how to document the extra fee.
