BSB Comparison Tool

Enter two BSB numbers to compare them side-by-side. Useful for checking which BSB to use after a bank merger or verifying branch details.

When to Use This Tool

The BSB Comparison Tool is particularly useful in these situations:

  • After a bank merger — verify which BSB is still active and which has been discontinued.
  • Verifying payment details — compare the BSB your payee gave you against the one on their invoice.
  • Multiple branches — compare two branches of the same bank to see location and payment capability differences.

For more about what happens when BSBs change, see our guide: How Bank Mergers Affect BSB Numbers.

Frequently Asked Questions

Why do two BSBs for the same bank have different payment capabilities?

Payment flags (Electronic, Paper, High Value) are set per branch, not per institution. A head office branch may support all three, while a smaller branch may only support Electronic.

What should I do if one BSB is discontinued and the other is active?

Stop using the discontinued BSB immediately. Banks typically redirect payments from discontinued BSBs for a transition period, but this is not guaranteed indefinitely. Update your records with the active BSB.

Can two different banks share the same BSB prefix?

No. Each two-digit prefix is allocated to a single financial institution. However, a single bank can hold multiple prefixes, particularly after mergers and acquisitions.

How do I know which BSB to use after a bank merger?

Use the active BSB. Enter both the old and new BSB here to compare them. If one is discontinued, use the active one. Your bank will also notify you with the correct BSB to use going forward.