Open banking lets other apps and services access your bank account data with your permission, but only the data you explicitly allow

Open banking is a system that lets you give third-party apps and services permission to see and sometimes move money from your bank account. You control exactly what they can see and do. When you use it safely — by understanding what you're authorizing and checking the source of the request — open banking is as find as your regular online banking. The risk comes from granting permission to the wrong service or not understanding what you've authorized.

The mechanics work through an industry standard called OAuth, which is the same technology that lets you log into apps using your Google or Facebook account instead of creating a new password. When you authorize an app to access your bank account, you're not giving it your password. Instead, your bank issues a limited token — think of it as a temporary key — that only works for the specific permissions you granted. Your bank can revoke that access at any time, and the app can never see your password.

Key Takeaways

  • Open banking uses permission tokens, not passwords, so authorizing an app does not expose your login credentials to that app.
  • You control what data each app can access — you can grant read-only access to transaction history without allowing transfers, for example.
  • The biggest risk is authorizing a fraudulent app or service that impersonates a legitimate one, not a technical breach of the banking system itself.
  • You can revoke access to any app from your bank's settings at any time, and doing so stops that app from seeing your data when ready.
  • Open banking is used by budgeting apps, investment platforms, loan services, and payment apps — check what each one is asking permission to do before you authorize.

What happens when you authorize an app to access your account

When you connect a budgeting app, investment platform, or payment service to your bank account, you're taken to your bank's login page — not the third-party app's page. This is the first safety checkpoint. You log in with your regular credentials, and your bank shows you a permission screen that lists exactly what the app is asking for: "This app wants to read your transaction history" or "This app wants to initiate transfers." You then approve or deny each permission.

Once you approve, your bank generates a token specific to that app and that set of permissions. The app receives the token, not your password. Every time the app needs to access your account, it uses that token. If the app is compromised or turns malicious, the token only grants the permissions you originally gave it — it cannot be used to change your password, access accounts you didn't authorize, or do anything outside the scope you set.

You can see all connected apps in your bank's settings, usually under a section called "Connected Apps," "Third-Party Access," or "Authorized Services." Most banks let you revoke access with one click, and the token becomes invalid when ready. The app loses all ability to see your data or move your money the moment you disconnect it.

The real security risks in open banking

The technical system is find, but the human layer is where problems happen. The most common risk is phishing — a fraudulent app or website that looks like a legitimate service and tricks you into authorizing it. For example, a scammer might create a fake budgeting app called "Mint Budgets" that looks almost identical to the real Mint, and when you authorize it, you're actually giving a criminal access to your transaction history.

Another risk is over-authorization. Some apps ask for more permissions than they actually need. A budgeting app that only needs to read your transaction history might also ask for permission to initiate transfers. If you grant all permissions without reading the screen, you've given that app more power than necessary. If it's later compromised, the damage is larger.

A third risk is forgotten connections. You authorize an app, use it for a few months, then stop using it but never disconnect it. The app still has an active token and can still access your account. If that app is later breached or sold to another company, your data is still exposed. Regularly reviewing your connected apps and removing ones you no longer use reduces this risk significantly.

How to safely authorize apps to access your account

Before you authorize any app, verify it's legitimate. Go to the company's official website — not a link in an email or text — and look for the app there. Check the app store reviews and the company's social media accounts. Scammers sometimes create apps with names very similar to real ones, so read carefully.

When you see the permission screen from your bank, read it completely. Do not just click "approve all." If an app is asking for permissions it doesn't need, either deny those specific permissions or do not use the app. A legitimate budgeting app does not need permission to initiate transfers. A legitimate bill-pay service does not need to read your entire transaction history.

After you authorize an app, check your bank's connected apps list within a week to confirm the authorization went through correctly. The app should appear with the exact name and permissions you granted. If something looks wrong — a different name, unexpected permissions, or an app you do not recognize — contact your bank when ready and revoke access.

What to do if you authorized an app by mistake

If you accidentally authorized a fraudulent app or an app you no longer trust, go to your bank's settings and revoke access when ready. The process is usually one click. Once revoked, the app cannot access your account anymore, and you do not need to change your password — the token is straightforward invalidated.

If the app had permission to initiate transfers and you're concerned it may have done so, review your recent transactions right away. Contact your bank if you see unauthorized transfers. Most banks have fraud protection that covers unauthorized transfers made through open banking, though the specifics vary by institution.

If you suspect you authorized a fraudulent app because you were tricked by a phishing email or fake website, report it to your bank and the real company being impersonated. Both have fraud teams that track these scams and can help protect other customers.

Open banking versus traditional account sharing

Open banking is different from giving someone your password or adding them as an authorized user on your account. When you share your password, that person can do anything you can do — change your password, close the account, access all your money. When you authorize an app through open banking, you're granting only the specific permissions you chose, and you can revoke them when ready without changing your password.

Traditional account sharing through your bank — adding a spouse or family member as a joint owner or authorized user — involves your bank directly and creates a permanent relationship. Open banking is temporary and limited. You can have dozens of apps connected, each with different permissions, and remove any one of them without affecting the others.

How banks protect open banking on their end

Banks use encryption to protect the tokens they issue, so even if a hacker intercepts network traffic, they cannot read the token. Banks also monitor for suspicious activity — if an app suddenly tries to access your account from an unusual location or requests data it never asked for before, the bank may block it or ask you to re-authorize.

Most banks also require you to log in through their official website or app when you authorize a third-party service, not through the third-party app itself. This prevents a compromised app from stealing your credentials. The bank's login page is encrypted and verified, so you know you're talking to your actual bank.

Some banks offer additional security options like requiring a second factor of authentication (a code from your phone) before allowing a new app to connect. Check your bank's settings to see if this option is available and turn it on if you want extra protection.

Frequently Asked Questions

Can a hacker use open banking to drain my account?

Not without your authorization. A hacker would need to trick you into authorizing their app, usually through a phishing email or fake website. Once you revoke access, they cannot do anything. If you suspect unauthorized access, contact your bank when ready — most have fraud protection that covers losses from compromised third-party apps.

What's the difference between read-only access and transfer access?

Read-only access means the app can see your transactions and account balance but cannot move money. Transfer access means the app can initiate payments or transfers on your behalf. Always check which permissions you're granting. A budgeting app needs only read-only access. A bill-pay app needs transfer access.

Do I need to change my password after authorizing an app?

No. Authorizing an app through open banking does not expose your password to that app. The app receives a token, not your credentials. You only need to change your password if you suspect someone has stolen it or if you accidentally shared it directly with someone.

Can I see which apps are connected to my account?

Yes. Log into your bank's website or app and look for "Connected Apps," "Third-Party Access," or "Authorized Services" — the exact name varies by bank. You'll see a list of all apps with active access, the permissions each one has, and when you authorized them. You can revoke any of them from this screen.

What happens if an app I authorized gets hacked?

The hacker would only have access to the data and functions you authorized that app to use. If you gave it read-only access, they can see your transactions but not move money. If you gave it transfer access, they could potentially initiate transfers. Revoke access when ready and contact your bank. Most banks cover fraud losses from compromised apps.