IRS

• (US) IPA^(key): /ˈaɪ.ɑɹ.ɛs/

IRS

1. (US) Initialism of Internal Revenue Service.
   • 2021 November 9, Jeanne Sahadi, “If you use Venmo, PayPal or other payment apps this tax rule change may affect you”, in CNN‎^[1]:

     […] It is going to be up to the taxpayer, if they receive a 1099 in any form for a nontaxable event, such as splitting rent among roommates, splitting a dinner bill, or even selling something on eBay for less than you paid for it, to explain to the IRS that the 1099 was received for a non-taxable transaction,” said Mark Luscombe, principal analyst for tax publisher Wolters Kluwer Tax & Accounting.

   • 2025 May, “The One, Big, Beautiful Bill”, in United States House Committee on Ways & Means‎^[2], page 20:

     Current law does not allow individuals to contribute to an HSA if they utilize certain discounted health services at a health clinic at their worksite because the IRS views such services as a significant medical benefit, therefore incompatible with HSAs.

2. (India) Initialism of Indian Revenue Service.

IRS (countable and uncountable)

1. (aviation) Initialism of inertial reference system.
2. (engineering) Initialism of Interface Requirements Specification.
3. (basketball) Initialism of instant replay system.

(Inertial Reference System):

• INS (inertial navigation system)
• INU (inertial navigation unit)
• IRU (inertial reference unit)

(Inertial Reference System):

• GPS (global positioning system)
• AHRS (attitude and heading reference system)

IRS (plural IRSs)

1. (finance) Initialism of interest rate swap.

• Sri, RSI, ISR, Sir., Isr., Sir, R.I.S., SIR, RIs, sir, SRI, R. I. S., RIS

Initialism of Imposto sobre o Rendimento de Pessoas Singulares.

IRS m

1. (Portugal) initialism of Imposto sobre o Rendimento de Pessoas Singulares (a personal income tax)

Borrowed from English IRS (“Internal Revenue Service”).

IRS m

1. Servicio de Impuestos Internos de los Estados Unidos; IRS.
   • 2025 June 7, Jeanne Sahadi, “El DOGE acaba de recibir luz verde para acceder a tus datos del Seguro Social. ¿Qué significa?”, in CNN en Español‎^[3]:

     Al igual que los sistemas de datos del IRS a los que el DOGE también ha solicitado acceso, los sistemas de la SSA son antiguos, complejos, interconectados y funcionan con un lenguaje de programación desarrollado hace décadas.

     (please add an English translation of this quotation)