The fifty rupiah coin (Rp50) is a denomination of the Indonesian rupiah. It was first introduced in 1971 and last minted in 2003. As of 2020, only aluminium Rp50 coins dating from 1999 through 2003 remain legal tender, although it is rarely seen in circulation due to its extremely low value.
The Rp50 coin was first introduced in 1971 as a cupronickel coin that weighed , had a diameter, was thick, and had a milled edge. Its obverse featured the lettering "BANK INDONESIA," "50 RUPIAH," and "1971," as well as two stars, while its reverse featured the lettering "Rp50" and a portrait of the greater bird-of-paradise (Paradisea apoda). A total of 1,035,435,000 coins were minted. These coins were demonetized on 25 June 2002, and were redeemable in commercial banks until 24 June 2007 and Bank Indonesia offices until 24 June 2012.
In 1991, the Bank of Indonesia issued an aluminium-bronze Rp50 coin that they minted until 1998. It weighed , had a diameter, was thick, and had a reeded edge. Its obverse featured the national emblem Garuda Pancasila as well as the lettering "BANK INDONESIA" and the year of issue (e.g., "1996") while its reverse featured a portrait of the komodo dragon (Varanus komodoensis) and the lettering "Rp 50" and "Komodo." These coins were demonetised on 30 November 2006, and were redeemable in commercial banks until 29 November 2011 and Bank Indonesia offices until 29 November 2016.
Mintage figures of this coin are as follows:
In 1999, the Bank of Indonesia updated the Rp50 coin, with its material changed to aluminum and its reverse now showing a portrait of the black-naped oriole (Oriolus chinensis) as well as the lettering "KEPODANG" and "50 RUPIAH"; its obverse remains the same (depicting the national emblem Garuda Pancasila, mint year (e.g., "2002"), and lettering "BANK INDONESIA"). These coins were minted until 2003, and weighed , had a diameter, were thick, and had a smooth edge.