"When I Start To (Break It All Down)" is a single by English synthpop duo Erasure, released as the lead single from their 2011 album Tomorrow's World. The song was written by Andy Bell and Vince Clarke, whilst it was produced by electropop musician Frankmusik who produced the rest of the Tomorrow's World album.

The song was released on 23 September 2011, and received its first UK airplay on BBC Radio 2's Ken Bruce show on 15 August.

It was the first eligible single (discounting remixed versions of hit singles), since the duo's formation in 1985, not to chart in the top 100 in the UK. The song peaked at #172 in the UK. In November 2011, the song peaked at #25 on the American Billboard Dance/Club Play Songs Chart.

An official YouTube short film featured the duo speaking of the album. In this film, it was stated that the original leading single from the album was to be "You've Got to Save Me Right Now" until "When I Start To (Break It All Down)" replaced it at short notice. Bell stated "Usually we don't choose the singles, you kind of have an instinctive feeling sometimes. In this instance, "When I Start To (Break It All Down)" took over from "Save Me" because we thought the song had gone in the direction that sounded really good."

The song originally had the demo title "Tender", where it was loosely based on the Elvis Presley song "Love Me Tender". In the short film on the album, Clarke stated the track got "mashed up into what it is now", noting "to me now it sounds like Tears for Fears."

Mute Records released a live video clip for the song as its official music video. This clip used footage recorded during the Total Pop Tour in the summer of 2011, most of them coming from the first of two Dublin gigs played in June 2011. It was released officially onto YouTube on 18 November 2011.

The song was performed live on the Tomorrow's World tour, where an official rehearsal video was uploaded onto YouTube in early September, featuring the duo in London rehearsing the song in full.

The single was released on CD, where a single version of "When I Start To (Break It All Down)" was used as the main track.

The b-side "Tomorrow's World" is an instrumental track, exclusive to the single, written by Richard Denton and Martin Cook. The track was originally released in 1980 as the theme from the BBC TV series of the same name.

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