IRR

IRR may refer to:

• Internal rate of return, a profitability metric
• Image rejection ratio, a radio metric
• Implied repo rate, a rate of return attained by means of a cash and carry trade
• Internet Routing Registry, a network routing database
• Iranian rial, the currency of Iran
• Individual Ready Reserve, a personnel status of the United States Military
• Iraqi Republic Railways, a transportation operator
• Institute of Race Relations, a policy institute
• Incident Response Regiment (Australia), an emergency response agency
• Institute for Religious Research, an apologetics organization
• Inner Ring Road (disambiguation)
• Interrupt Request Register, a register used for managing interrupts in programmable interrupt controllers.