How Interac e-Transfer Actually Works (It's Not Email)
We've covered wires, US ACH, Canada's EFT batch system, and real-time rails. But if you live in Canada, none of those are what you actually use to pay your roommate back for groceries or send your nephew birthday money. That's Interac e-Transfer, and it's worth its own post, because what most people assume is happening ("I'm emailing money") isn't quite right.
The name is a little misleading
Real world example: you split a $60 dinner bill with a friend. You open your banking app, type in their email address, hit send, and a few minutes later they've got the money. It feels like you emailed them cash. You didn't.
Email and text messages are just the notification, a heads up that says "hey, someone sent you money, go get it." The actual money moves through a separate, secure network that directly connects Canadian banks and credit unions to each other. Your friend's email address is really just a lookup key, like a nickname the bank uses to figure out which account to credit, not a pipe that money flows through.
Two ways it can land
When your friend gets that notification, one of two things happens, depending on whether they've set up Autodeposit:
- Without Autodeposit: they have to click the link and answer a security question you set up (like "what's the name of my dog") before the money is released. Think of it like a locked mailbox, they need the right key.
- With Autodeposit: the money lands automatically the moment it's sent, no security question needed, because their bank already knows exactly which account it belongs to. It's like having a mail slot the mail carrier can drop letters straight into.
Autodeposit is faster and safer (no security answer to guess), which is why most banks now nudge you to turn it on.
How much you can actually send
Interac itself caps any single e-Transfer at $25,000, but that's just the ceiling. Your own bank sets a lower default limit, and it's usually broken into a few tiers: a max per transaction, a max per day, and a max per month. As an example, one major Canadian bank defaults to $3,000 per transaction, $10,000 per day, and $30,000 per month, though you can usually ask your bank to raise those.
It's not just for splitting dinner
Businesses use Interac e-Transfer too, insurance companies sending out claim payouts, landlords collecting rent, small businesses getting paid by customers who'd rather not hand over a credit card. There's a business version built for exactly that, letting a company send or request many transfers at once instead of one at a time, similar in spirit to how a company batches its payroll into a NACHA or EFT file, just built around the same email/phone based system instead of routing numbers.
Getting faster, and getting ready for what's next
Interac has been upgrading its underlying rails, and recent improvements have cut typical settlement times noticeably, transfers that used to take longer now often land within minutes rather than sitting for a while. That fits right into the story from our last post: Canada's new Real-Time Rail is set to launch in phases starting late 2026, and Interac e-Transfer is expected to keep working alongside it as the everyday, person to person layer Canadians already know, while the RTR becomes the newer, industry-wide backbone.
Where it fits in everything we've covered
| Wire | EFT (Canada) | Interac e-Transfer | |
|---|---|---|---|
| Who it's for | Large, urgent, often international payments | Payroll, business batch payments | Everyday person to person and small business payments |
| How you address it | Bank account and routing details | Bank account and routing details | Just an email or phone number |
| Speed | Minutes to same day | 1-2 business days | Often within minutes |
| Typical amount | Large | Any size, usually batched | Capped, usually a few thousand dollars |
Wrapping up the series
That closes the loop on this series: wires for the big, urgent stuff, ACH and EFT for the everyday batch payments running quietly in the background, real-time rails for when speed matters most, and Interac e-Transfer as the friendly, everyday face of all of it for millions of Canadians who've never thought about routing numbers at all.
Further reading: