Understanding Open Banking and How It Connects to Your Accounts

Open banking is one of those rare technologies that actually lives up to the hype—it's just not hyped very well. At its core, it's simple: your accounting software connects directly to your bank, transactions import automatically, and you stop typing numbers into spreadsheets at 10pm on a Thursday night. But "simple" isn't the same as unimportant. Understanding open banking represents a genuine shift in how financial data moves between institutions, and knowing how it works helps you make better decisions about managing your business finances.

If you're still manually entering bank transactions or downloading CSV files to upload into your accounting software, open banking is the upgrade that actually saves you meaningful time—without requiring you to change banks, hand over your password, or trust a dodgy third-party service.

What is Open Banking?

Open banking is, at its heart, a permission system. You tell your bank: "I'd like my accounting software to see my transactions." Your bank checks that you're really you. Your accounting software gets read-only access to your transaction history and balance. Nobody sees your password. Everybody's secure.

The concept emerged from regulation, not innovation. In the UK, the Open Banking Standard was mandated in 2018 by a Competition and Markets Authority order after reviewing how small businesses were being served (spoiler: not great). The directive forced the big retail banks to expose their data through secure APIs instead of hoarding it. The European Union's PSD2 directive does something similar. Australia, Canada, and Brazil have their own flavours. The principle is identical everywhere: your financial data is yours, and you should be able to share it with services you choose.

("Open banking" is enterprise software speak for "the big banks finally had to stop being the only door to your own money.")

How Open Banking Actually Works

When you connect your bank account to your accounting software through open banking, here's the journey your data takes:

You open your accounting software and find the "Connect bank" button
You're redirected to your actual bank's website—the real one, not a phishing copy
You log in with your usual credentials (just like checking your balance online)
You see a consent screen explaining exactly what data the software can access
You tap yes
A secure token-based connection is established
Transactions start arriving in your accounting software, usually within hours

At no point does your accounting software touch your login credentials. The whole thing runs on secure APIs and token-based authentication—the same encryption layer that secures your online banking. You can revoke access anytime through your bank or the provider.

What data flows:

Transaction history (dates, amounts, descriptions, who paid or received)
Account balances (current, available)
Account details (number, sort code, account type)

What stays locked:

Your password
Your PIN
Your ability to make payments (unless you separately authorise that)

Why Open Banking Matters for Your Accounting

If this sounds like "just a convenience thing," you're thinking too small. Open banking fixes real problems that waste your time right now.

You stop manually entering transactions

Every transaction you type into your accounting software is an opportunity for a typo. (And yes, even careful people mistype "4000" as "4000.00" when they're tired.) Open banking pulls transactions directly from the source of truth—your bank—so the data that arrives in your accounting software is accurate by default.

For businesses with any volume, this is transformational. A 10-person business might process 200–400 transactions a month. That's a solid day's work typing numbers and descriptions. Open banking deletes that day.

Bank reconciliation stops being a chore

Bank reconciliation is the process of matching your accounting records against your actual bank statement. Before open banking, you'd export a CSV from your bank, import it into your accounting software, manually match the ones that didn't auto-match, and investigate weird discrepancies.

With open banking, transactions arrive as they happen. Better: many accounting platforms auto-match them against sales invoices and bills you've already recorded. Instead of a Friday afternoon archaeology session, reconciliation becomes a 15-minute review.

You finally see your real cash position

Your profit and loss statement tells you whether you made money. But your bank balance tells you whether you have money—which is a different and more urgent question. With open banking, your accounting software always shows your current bank balance alongside your financial records. You don't have to log into your banking app separately, and you're never looking at yesterday's data.

Categorisation gets smarter

When a transaction arrives in your accounting software, it comes with the bank's description: "TESCO STORES 5487 LONDON." Your accounting software matches that against your suppliers and auto-categorises it. Over time, it learns: payments to that merchant always go to "Stock Purchases," that monthly payment is "Rent," that subscription always goes to "Software." When setting up your chart of accounts for a new business, these categories become your template. Less manual tagging. Fewer miscategorisations. Better records.

One view of all your accounts

If your business uses multiple bank accounts—a current account, a savings account, a credit card, whatever—open banking lets you connect all of them. Single login. Complete picture. Full visibility of your financial position.

Security—The Real Questions You Should Ask

The most common objection to open banking is security. That's legitimate. Here's what's actually true:

You're not giving anyone your password

This is the big one. Open banking doesn't require you to hand your banking credentials to a third party. It uses token-based authentication—the same mechanism that lets you "log in with Google" or "log in with Facebook" on websites. Your bank issues a token, the accounting software presents the token, the bank grants access. Your password never leaves your bank.

Open banking providers are regulated

In the UK, any organisation handling this kind of access must be authorised by the Financial Conduct Authority. They undergo security assessments. They're subject to regular oversight. They face actual penalties for breaches.

Xero isn't some random app in the app store—it's a regulated financial services provider. So is Sage. So are the other major accounting platforms.

Data is encrypted like online banking

Transactions flow over encrypted connections (same as when you check your bank balance online). Access is controlled with secure tokens. Data stored in the accounting software is encrypted at rest.

You control what they can see

You grant specific permissions. An accounting software gets read-only access to transactions—it can see them but not move money. Payment initiation (actually paying bills from your accounting software) is a separate permission that requires separate consent.

And you can revoke access anytime. Not "we'll process your request in 5–7 business days." Right now. Through your bank's interface.

One thing to verify

When you connect your bank, check that:

The provider is registered with the FCA (or your country's equivalent regulator)
You're really on your bank's website (check the URL)
You can see your active consents in your banking app
The connection is read-only (no payment access unless you chose otherwise)

Setting Up Open Banking—It's Genuinely Easy

If your bank and your accounting software both support open banking, setup takes about 10 minutes.

Step 1: Check the box. Does your bank offer open banking connections? Do a quick search: "[Your Bank] open banking." If the answer to both is yes, you're good.

Step 2: Start the connection. Open your accounting software. Find "Add bank feed," "Connect bank," or "Open banking" (labelling varies). Select your bank from the list.

Step 3: Log in to your bank. You'll be redirected to your actual bank's website. Log in exactly as you would if you were checking your balance. (If you're asked for your password by the accounting software, something's wrong—stop and contact support.)

Step 4: Grant consent. Your bank will show you a screen saying "[Accounting Software] is requesting access to: transaction history, account balance, account details." Review it. Tap "yes" or "approve."

Step 5: Select which accounts. If you have multiple accounts at that bank, choose which ones to connect. You don't have to connect all of them.

Step 6: Done. Transactions should start appearing within an hour. Set up a few categorisation rules (rent always goes to Rent, etc.), and from here on, reconciliation is mostly automated. You can also use this same principle when automating your accounts payable process with supplier payments.

One heads-up: Open banking consents typically expire after 90 days for security reasons. Your accounting software will prompt you to re-authorise when that happens. It's the same three-step process, takes 2 minutes.

What Open Banking Means for the Rest of Your Accounting

Once your bank is connected, a few practices actually matter:

Set up categorisation rules. A monthly landlord payment is always rent. Weekly supplier orders are always raw materials. Tell your software once, and it handles the rest.

Reconcile regularly—but briefly. Weekly review is enough. You're not matching hundreds of items manually; you're spot-checking that transactions arrived correctly and reviewing anything unusual.

Match invoices to payments. When you record a sales invoice and the customer pays, your accounting software can automatically match the payment against the invoice. Close the loop. Keep your records tight.

Connect everything. If your business uses multiple accounts, connect them all. Partial visibility means partial decisions.

Frequently Asked Questions

Q: Does open banking cost extra? A: No. Open banking connections are free. You pay for your accounting software, as usual; the bank connection doesn't add to that cost.

Q: What if my bank doesn't support open banking? A: Coverage is growing but isn't universal. If your bank doesn't offer it yet, check back in a few months—they probably will soon. In the meantime, traditional bank feeds (direct import through the accounting software) are still available from many providers, though they're less elegant.

Q: Can the accounting software make payments from my account? A: Standard accounting connections are read-only—they can view transactions but not move money. Payment initiation is a separate feature requiring separate consent, and most small businesses don't use it.

Q: How often are transactions updated? A: Most banks push transaction data to the accounting software multiple times per day. Some update every few hours. It's effectively real-time.

Q: What happens if I disconnect the bank? A: Historical transactions stay in your accounting software. Future transactions stop importing. You can reconnect anytime, and new transactions will flow again from that point.

Q: Is this less secure than online banking? A: It uses the same encryption and authentication. Your banking credentials never leave your bank. In practical terms, it's as secure as logging into your banking app—which you probably do daily without thinking about it.

Q: Can I connect a business credit card? A: Yes, if your card provider supports it. Coverage varies, but most major providers (American Express, Visa, Mastercard, etc.) offer open banking connections for business cards.

Q: What if a transaction doesn't arrive? A: This is rare, but it can happen—unusual transaction types, transfers between accounts at the same bank, or very recent transactions sometimes take longer. Check your bank app to confirm the transaction actually posted. If it did, contact your accounting software support—they can manually import it.

The Next Step

Open banking is the simplest meaningful upgrade you can make to your accounting workflow. If you're currently typing transactions or uploading CSV files, switching to open banking saves you material time—probably 6–10 hours per month for a typical small business—while improving accuracy and giving you better visibility of your cash position.

Try Relentify's accounting software free for 14 days. Connect your bank account in about 10 minutes, and see how much time you get back.