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Opening Bank Accounts and Merchant Processing After Buying an Ontario Business

What banking and payment-processing setup needs to happen before and after closing when you buy a business in Ontario. A practical checklist for buyers.

Buying & Selling a Business5 min readTSLBy the Treadstone Law team · OntarioUpdated 2026-07
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Key takeaways
  • A bank account and a merchant processing agreement are contracts between the seller — a specific legal entity — and a financial institution or processor.
  • - [ ] Confirm the deal structure (share vs.
  • On closing day, purchase funds typically flow through the parties' lawyers, with adjustments made for items like prepaid expenses, accrued liabilities, and any working-capital true-up…

Closing on a business purchase is a legal milestone, but it isn't the same thing as being ready to actually run the business the next morning. One of the most common gaps between "the deal is signed" and "we're operating" is banking: a buyer generally can't simply start using the seller's existing bank accounts or payment terminals, because financial institutions and payment processors run their own underwriting on whoever is actually operating the account.

This article walks through opening a business bank account and merchant processing around a business purchase — what to line up before closing, what happens with money on closing day, and what to clean up afterward.

Why You (Usually) Can't Just Use the Seller's Accounts

A bank account and a merchant processing agreement are contracts between the seller — a specific legal entity — and a financial institution or processor. In an asset sale, the buyer is a different legal entity, so it generally needs its own accounts and its own merchant agreement, underwritten independently of the seller's history. Even in a share sale, where the corporate entity doesn't change, banks and processors typically still want updated signing authorities and ownership disclosure once control of the business changes hands — financial institutions have their own know-your-client obligations that don't disappear just because the underlying corporation is the same one on file.

Before Closing: What to Line Up

At Closing: Money in Motion

On closing day, purchase funds typically flow through the parties' lawyers, with adjustments made for items like prepaid expenses, accrued liabilities, and any working-capital true-up built into the purchase agreement. If part of the price is being held back or placed in escrow to secure post-closing indemnity claims, that arrangement runs separately from the buyer's own day-to-day operating accounts — it doesn't substitute for having your own banking in place to actually run the business.

After Closing: Don't Let This Slip

Once the deal is done, a few things are easy to forget in the rush of actually operating the business:

Frequently asked questions

Can a buyer negotiate to keep the seller's existing merchant processor?

Sometimes a buyer can apply to the same processor and get underwritten in its own name, especially if the processor is willing to consider the business's transaction history. But this is a new application under the buyer's own identity — it isn't the same as simply inheriting the seller's existing merchant account.

What happens to the money already in the seller's bank account at closing?

That generally belongs to the seller unless the purchase agreement specifically treats certain cash or receivables as part of the deal (for example, through a working-capital adjustment). This is exactly the kind of detail that needs to be spelled out clearly in the agreement rather than assumed.

Do we need a new bank account for a share purchase too?

Not legally, since the corporation and its accounts continue unchanged — but in practice, most buyers still update signing authorities, online banking access, and sometimes the institution itself once they take over management and control.

How does a holdback or escrow interact with the buyer's own banking setup?

A holdback or escrow is a separate pool of funds tied to the purchase agreement's indemnity provisions — it's meant to secure the buyer against post-closing claims, not to fund day-to-day operations. The buyer still needs its own operating accounts and merchant processing in place independently of whatever holdback arrangement is negotiated.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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