AI agents for business finance: what they can and can't do
What AI agents can do in bookkeeping, close, collections and compliance today, where a person must stay in charge, and how to judge a product.
The short answer
Canadian contractors and trades can use AI agents to track payments to subcontractors for T5018 reporting, apply GST/HST to invoices from rules confirmed with an accountant, draft quotes and change orders, chase overdue invoices and hold US-dollar payments from cross-border jobs. Decisions on worker status, tax treatment in unclear cases, pricing and disputes should stay with the owner and their adviser.
Construction businesses in Canada carry a particular reporting duty: the Contract Payment Reporting System, under which businesses whose primary activity is construction report payments made to subcontractors for construction services on T5018 slips. Add GST/HST on every invoice, provincial differences, change orders on site and, for some firms, jobs paid in US dollars, and the admin quickly outgrows a spreadsheet.
This is a general summary, not tax advice. Check the CRA guidance and talk to your accountant.
T5018 in general terms
| Point | General position (check CRA guidance) |
|---|---|
| Who reports | Businesses whose primary activity is construction, generally meaning most of their business income comes from construction |
| What is reported | Payments to subcontractors for construction services, on T5018 slips with a summary |
| Threshold | Generally payments of $500 or more to a subcontractor in the reporting period |
| Deadline | Generally six months after the end of the reporting period |
| Records | Subcontractor names, addresses, business or social insurance numbers, and amounts paid |
An agent fits this well because T5018 reporting is mostly about collecting the right details at the start and totalling payments accurately at the end. The difficulty is usually missing information: a subcontractor whose business number was never recorded, or payments that mixed services and goods.
- Subcontractor details collected before the first payment, including the business number.
- Every payment tagged to the subcontractor and to construction services where applicable.
- A running total per subcontractor through the reporting period, with those over the threshold listed.
- Slips and the summary prepared for the owner or accountant to review and file.
GST/HST on contractor invoices
Most contractors register for GST/HST once their taxable supplies exceed the small supplier threshold, which CRA sets out in its guidance. The rate charged depends on where the supply is made, which matters for firms working across provinces. An agent can apply the correct rate from rules your accountant has confirmed, show your registration number on invoices and track input tax credits on purchases.
- Rate applied by place of supply, from a confirmed rule table.
- Registration number and required details shown on each invoice.
- Input tax credits on materials and subcontractor invoices recorded with the supporting invoice.
- Unusual cases, such as work on new housing or for exempt customers, sent to the accountant.
Quotes, change orders and getting paid
Change orders are where contractors lose margin. A client asks for an extra outlet or a different finish on site, the crew does it, and nobody writes it down. An agent that records each change order the moment it is agreed, prices it from your rates, and sends written confirmation to the client turns a verbal request into a billable line.
- Quotes drafted from your rates; anything outside your band approved by you.
- Change orders recorded with date, scope, price and who agreed.
- Progress invoices sent on agreed milestones, with any holdback recorded as your contract and provincial rules require.
- Overdue invoices chased politely on a schedule you set.
Provincial prompt-payment and holdback rules differ, and some provinces have specific construction legislation. Ask your lawyer which apply to your contracts. The explainer on chasing invoices well applies to contractors too.
Holdback in particular needs careful records, because amounts are retained for a period and released later. An agent that tracks each holdback by job and release date stops it being forgotten in the busy season.
Cross-border jobs and client data
Contractors near the border, or working for US clients, are often paid in US dollars. Converting on arrival at whatever rate applies that day can cost more than the margin on a small job. Holding USD and paying US-dollar costs from it, then converting the rest when a person decides, keeps that choice with the owner.
Client files contain names, addresses, access codes and sometimes photos of homes. Under PIPEDA, private-sector businesses must protect personal information and use it only for the purposes they identified. Give each agent access only to what it needs, and keep access codes out of general support records.
Worked example
Example only, invented figures. A renovation contractor in Ontario reviews its year-end.
- T5018
- Eleven subcontractors paid this year; nine above the threshold. One is missing a business number; request sent. Slips prepared for the accountant.
- GST/HST
- All invoices carry 13% HST for Ontario work; one job in Quebec used the rule table for that province and was flagged for the accountant to check.
- Change orders
- 27 recorded this year, CAD 18,600 billed that would previously have been missed.
- USD
- A Michigan client paid USD 14,000; held in USD and used for a US supplier invoice. The owner chose to convert the balance.
Where Pryme fits
A Pryme Business account comes with five agents built and certified by Pryme Intelligence. The Finance agent tracks subcontractor payments and invoices, the Sales agent records quotes and change orders, and nothing is paid above your ceiling without approval. The account can be opened from any country and holds USD alongside GBP, EUR and NGN; see multicurrency. Outside Nigeria, Pryme works through regulated partners. You can open an account for your firm.
Questions people ask
Who has to file T5018 slips in Canada?
Generally, businesses whose primary activity is construction must report payments to subcontractors for construction services. Check CRA's T5018 guidance for the definitions and threshold.
When are T5018 slips due?
Generally within six months after the end of the reporting period. Confirm the date for your chosen period with CRA guidance.
Can an AI agent charge the right GST/HST rate?
It can apply rates from a rule table your accountant has confirmed, based on where the supply is made. Unclear cases should go to the accountant.
Can an agent decide if a worker is a subcontractor?
No. Worker status has payroll and tax consequences and should be decided by the owner with advice.
Sources
- T5018 slip: Statement of contract payments (CRA) · accessed Oct 2026
- GST/HST for businesses (CRA) · accessed Oct 2026
- The Personal Information Protection and Electronic Documents Act (Office of the Privacy Commissioner of Canada) · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.