- Bank Machine Ltd Harwich
- Bank of Ireland Harwich
- Barclays Bank plc Harwich
- Co-operative Bank plc Harwich
- Halifax plc Harwich
- HSBC Bank plc Harwich
- Lloyds TSB Bank Plc Harwich
- National Westminster Bank/NatWest Harwich
- Nationwide Building Society Harwich
- Notemachine Harwich
- Omnicash Harwich
- Paypoint Harwich
- Royal Bank of Scotland Harwich
- Santander Harwich
- Travelex UK Ltd Harwich