| Abbreviation | Definition |
|---|---|
| IOCR | Incremental Output Capital Ratio |
| IOCS | In-Office Cost System |
| IOCX | Extended Immediate-Or-Cancel order |
| IOLTA | Interest on Lawyers' Trust Accounts |
| IOMCASS | Isle of Man Chartered Accountants' Student Society |
| IOSCO | International Organization of Securities Commissions |
| IOU | Is Owed Unto .... |
| IPA | Independent Police Auditor |
| IPA | Insolvency Practitioners Association |
| IPA | Institute of Petroleum Accounting |
| IPAB | Independent Payment Advisory Board |
| IPAS | Internet Payment Authorization Service |
| IPC | Information Product Cash |
| IPC | Insolvency Practices Council |
| IPC | Interim Payment Certificate |
| IPD | Initial Professional Development |
| IPD | Institute of Personnel and Development |
| IPN | Instant Payment Notification |
| IPO | Interest Paid On |
| IPPF | International Professional Practices Framework |