| Date | Time |
| Home | Score | Away | Venue | TV/Att |
|
| August 2012 |
| Fri 31 Aug | 19:00 |
| Dragons | 37 - 6 | Zebre | Rodney Parade | 4,540 | Report |
| Fri 31 Aug | 19:05 |
| Ulster | 18 - 10 | Glasgow | Ravenhill | 8,108 | Report | Video |
| Fri 31 Aug | 20:05 |
| Treviso | 12 - 6 | Ospreys | Stadio di Monigo | 3,500 | Report |
| September 2012 |
| Sat 1 Sep | 17:00 |
| Connacht | 9 - 13 | Blues | Sportsground | 3,869 | Report | Video |
| Sat 1 Sep | 18:30 |
| Scarlets | 45 - 20 | Leinster | Parc y Scarlets | 6,559 | Report | Video |
| Sat 1 Sep | 20:00 |
| Edinburgh | 18 - 23 | Munster | Murrayfield | 4,050 | Report |
| Fri 7 Sep | 19:05 |
| Blues | 19 - 21 | Edinburgh | Cardiff Arms Park | 7,412 | Report | Video |
| Fri 7 Sep | 19:05 |
| Zebre | 17 - 30 | Connacht | Stadio XXV Aprile | 2,025 | Report |
| Fri 7 Sep | 19:35 |
| Glasgow | 13 - 18 | Scarlets | Scotstoun | 4,348 | Report |
| Fri 7 Sep | 20:00 |
| Munster | 19 - 6 | Treviso | Thomond Park Stadium | 15,642 | Report | Video |
| Sat 8 Sep | 18:15 |
| Leinster | 45 - 25 | Dragons | Royal Dublin Society | 15,724 | Report | Video |
| Sat 8 Sep | 18:30 |
| Ospreys | 13 - 16 | Ulster | Liberty Stadium | 8,566 | Report | Video |
| Fri 14 Sep | 19:05 |
| Ospreys | 10 - 28 | Glasgow | Liberty Stadium | 7,159 | Report | Video |
| Fri 14 Sep | 19:05 |
| Ulster | 20 - 19 | Munster | Ravenhill | 10,397 | Report | Video |
| Fri 14 Sep | 19:30 |
| Edinburgh | 41 - 10 | Zebre | Murrayfield | 3,541 | Report |
| Sat 15 Sep | 15:00 |
| Connacht | 11 - 24 | Scarlets | Sportsground | 4,074 | Report | Video |
| Sat 15 Sep | 18:30 |
| Dragons | 5 - 16 | Blues | Rodney Parade | 7,331 | Report | Video |
| Sat 15 Sep | 19:05 |
| Treviso | 18 - 19 | Leinster | Stadio di Monigo | 5,000 | Report |
| Fri 21 Sep | 19:05 |
| Scarlets | 16 - 23 | Ospreys | Parc y Scarlets | 14,111 | Report | Video |
| Fri 21 Sep | 19:35 |
| Glasgow | 27 - 17 | Connacht | Scotstoun | 3,646 | Report |
| Sat 22 Sep | 18:15 |
| Leinster | 22 - 16 | Edinburgh | Royal Dublin Society | 17,794 | Report | Video |
| Sat 22 Sep | 18:30 |
| Blues | 34 - 18 | Treviso | Cardiff Arms Park | 8,138 | Report | Video |
| Sat 22 Sep | 20:00 |
| Munster | 33 - 13 | Dragons | Thomond Park Stadium | 15,064 | Report |
| Fri 28 Sep | 19:00 |
| Dragons | 32 - 12 | Edinburgh | Rodney Parade | 5,197 | Report |
| Fri 28 Sep | 19:05 |
| Blues | 19 - 48 | Ulster | Cardiff Arms Park | 8,217 | Report | Video |
| Fri 28 Sep | 19:35 |
| Glasgow | 22 - 19 | Zebre | Scotstoun | 3,313 | Report |
| Fri 28 Sep | 20:00 |
| Connacht | 34 - 6 | Leinster | Sportsground | 5,813 | Report | Video |
| Sat 29 Sep | 18:30 |
| Ospreys | 30 - 15 | Munster | Liberty Stadium | 8,652 | Report | Video |
| Sat 29 Sep | 19:05 |
| Treviso | 22 - 20 | Scarlets | Stadio di Monigo | 3,500 | Report |
| October 2012 |
| Fri 5 Oct | 19:05 |
| Scarlets | 24 - 13 | Dragons | Parc y Scarlets | 7,863 | Report | Video |
| Fri 5 Oct | 19:05 |
| Ulster | 25 - 0 | Connacht | Ravenhill | 10,052 | Report | Video |
| Fri 5 Oct | 19:05 |
| Zebre | 16 - 34 | Ospreys | Stadio XXV Aprile | 2,500 | Report |
| Fri 5 Oct | 19:30 |
| Edinburgh | 22 - 27 | Treviso | Murrayfield | 4,079 | Report |
| Sat 6 Oct | 18:30 |
| Blues | 3 - 18 | Glasgow | Cardiff Arms Park | 7,442 | Report | Video |
| Sat 6 Oct | 18:30 |
| Leinster | 30 - 21 | Munster | AVIVA Stadium | 46,280 | Report |
| Fri 26 Oct | 19:05 |
| Dragons | 19 - 46 | Ulster | Rodney Parade | 5,057 | Report | Video |
| Fri 26 Oct | 19:35 |
| Edinburgh | 28 - 29 | Scarlets | Murrayfield | 3,754 | Report |
| Fri 26 Oct | 19:45 |
| Munster | 29 - 3 | Zebre | Thomond Park Stadium | 14,738 | Report |
| Sat 27 Oct | 14:30 |
| Ospreys | 26 - 9 | Connacht | Liberty Stadium | 8,231 | Report | Video |
| Sat 27 Oct | 18:30 |
| Leinster | 59 - 22 | Blues | Royal Dublin Society | 17,236 | Report |
| Sat 27 Oct | 19:05 |
| Treviso | 13 - 24 | Glasgow | Stadio di Monigo | 3,000 | Report |
| November 2012 |
| Fri 2 Nov | 19:05 |
| Blues | 18 - 24 | Munster | Cardiff Arms Park | 8,064 | Report | Video |
| Fri 2 Nov | 19:05 |
| Ulster | 45 - 20 | Edinburgh | Ravenhill | 11,078 | Report |
| Fri 2 Nov | 19:30 |
| Glasgow | 37 - 6 | Dragons | Scotstoun | 3,317 | Report |
| Sat 3 Nov | 17:00 |
| Connacht | 18 - 3 | Treviso | Sportsground | 4,112 | Report |
| Sat 3 Nov | 18:30 |
| Scarlets | 22 - 13 | Zebre | Parc y Scarlets | 5,757 | Report | Video |
| Sun 4 Nov | 16:00 |
| Ospreys | 19 - 10 | Leinster | Liberty Stadium | 9,246 | Report | Video |
| Sun 18 Nov | 15:00 |
| Zebre | 25 - 27 | Ulster | Stadio XXV Aprile | 2,550 | Report |
| Fri 23 Nov | 19:00 |
| Dragons | 14 - 3 | Connacht | Rodney Parade | 4,168 | Report |
| Fri 23 Nov | 19:05 |
| Treviso | 15 - 16 | Ulster | Stadio di Monigo | 3,500 | Report |
| Fri 23 Nov | 19:05 |
| Edinburgh | 23 - 13 | Ospreys | Murrayfield | 3,128 | Report | Video |
| Fri 23 Nov | 19:35 |
| Glasgow | 0 - 6 | Leinster | Scotstoun | 3,970 | Report |
| Sun 25 Nov | 15:00 |
| Zebre | 7 - 14 | Blues | Stadio XXV Aprile | 700 | Report |
| Sun 25 Nov | 17:15 |
| Munster | 6 - 13 | Scarlets | Musgrave Park | 6,219 | Report |
| Fri 30 Nov | 19:05 |
| Ospreys | 33 - 12 | Blues | Liberty Stadium | 8,169 | Report | Video |
| December 2012 |
| Sat 1 Dec | 15:00 |
| Treviso | 32 - 13 | Dragons | Stadio di Monigo | 3,600 | Report | Video |
| Sat 1 Dec | 17:00 |
| Connacht | 23 - 24 | Edinburgh | Sportsground | 4,930 | Report |
| Sat 1 Dec | 18:00 |
| Leinster | 37 - 7 | Zebre | Royal Dublin Society | 15,894 | Report | Video |
| Sat 1 Dec | 19:45 |
| Munster | 31 - 3 | Glasgow | Thomond Park Stadium | 15,138 | Report |
| Sun 2 Dec | 16:00 |
| Scarlets | 12 - 19 | Ulster | Parc y Scarlets | 7,089 | Report | Video |
| Fri 21 Dec | 19:05 |
| Blues | 6 - 9 | Scarlets | Cardiff Arms Park | 9,872 | Report |
| Fri 21 Dec | 19:05 |
| Ulster | 27 - 19 | Leinster | Ravenhill | 10,940 | Report | Video |
| Fri 21 Dec | 19:35 |
| Glasgow | 23 - 14 | Edinburgh | Scotstoun | 6,000 | Report |
| Sat 22 Dec | 15:00 |
| Zebre | 3 - 10 | Treviso | Stadio XXV Aprile | 3,000 | Report |
| Sat 22 Dec | 17:15 |
| Connacht | 12 - 16 | Munster | Sportsground | 7,789 | Report |
| Wed 26 Dec | 14:05 |
| Blues | 12 - 10 | Dragons | Cardiff Arms Park | 10,243 | Report |
| Wed 26 Dec | 17:30 |
| Ospreys | 32 - 3 | Scarlets | Liberty Stadium | 19,443 | Report |
| Sat 29 Dec | 15:00 |
| Treviso | 26 - 18 | Zebre | Stadio di Monigo | 5,000 | Report |
| Sat 29 Dec | 16:05 |
| Edinburgh | 17 - 21 | Glasgow | Murrayfield | 11,225 | Report |
| Sat 29 Dec | 17:30 |
| Munster | 24 - 10 | Ulster | Thomond Park Stadium | 23,587 | Report | Video |
| Sat 29 Dec | 19:45 |
| Leinster | 17 - 0 | Connacht | Royal Dublin Society | 18,500 | Report |
| Mon 31 Dec | 16:15 |
| Dragons | 3 - 14 | Ospreys | Rodney Parade | 7,018 | Report |
| January 2013 |
| Fri 4 Jan | 19:05 |
| Ospreys | 16 - 15 | Zebre | Liberty Stadium | 7,891 | Report |
| Fri 4 Jan | 19:05 |
| Ulster | 47 - 17 | Scarlets | Ravenhill | 10,977 | Report | Video |
| Fri 4 Jan | 19:30 |
| Glasgow | 41 - 7 | Treviso | Scotstoun | 3,605 | Report |
| Fri 4 Jan | 19:35 |
| Edinburgh | 16 - 31 | Leinster | Murrayfield | 3,821 | Report |
| Sat 5 Jan | 17:00 |
| Connacht | 30 - 11 | Dragons | Sportsground | 4,958 | Report |
| Sat 5 Jan | 19:30 |
| Munster | 6 - 17 | Blues | Musgrave Park | 8,874 | Report | Video |
| February 2013 |
| Fri 8 Feb | 19:05 |
| Ulster | 12 - 16 | Ospreys | Ravenhill | 10,886 | Report | Video |
| Fri 8 Feb | 19:30 |
| Blues | 11 - 26 | Leinster | Cardiff Arms Park | 5,783 | Report |
| Fri 8 Feb | 19:30 |
| Dragons | 23 - 14 | Treviso | Rodney Parade | 4,212 | Report |
| Fri 8 Feb | 19:30 |
| Scarlets | 25 - 15 | Connacht | Parc y Scarlets | 5,886 | Report |
| Sat 9 Feb | 19:45 |
| Munster | 30 - 3 | Edinburgh | Musgrave Park | 7,241 | Report |
| Sun 10 Feb | 15:05 |
| Zebre | 20 - 36 | Glasgow | Stadio XXV Aprile | 1,000 | Report |
| Fri 15 Feb | 19:05 |
| Dragons | 3 - 60 | Glasgow | Rodney Parade | 4,311 | Report | Video |
| Fri 15 Feb | 19:05 |
| Ulster | 26 - 3 | Zebre | Ravenhill | 10,309 | Report |
| Fri 15 Feb | 19:30 |
| Edinburgh | 16 - 17 | Blues | Murrayfield | 3,583 | Report |
| Fri 15 Feb | 19:45 |
| Connacht | 22 - 10 | Ospreys | Sportsground | 4,680 | Report |
| Sat 16 Feb | 17:00 |
| Leinster | 40 - 5 | Treviso | Royal Dublin Society | 16,208 | Report |
| Sat 16 Feb | 18:30 |
| Scarlets | 18 - 10 | Munster | Parc y Scarlets | 7,124 | Report | Video |
| Fri 22 Feb | 19:30 |
| Blues | 22 - 26 | Connacht | Cardiff Arms Park | 5,236 | Report |
| Fri 22 Feb | 19:35 |
| Glasgow | 20 - 14 | Ulster | Scotstoun | 5,613 | Report |
| Fri 22 Feb | 20:00 |
| Ospreys | 24 - 7 | Edinburgh | Liberty Stadium | 5,580 | Report |
| Sat 23 Feb | 19:45 |
| Leinster | 32 - 5 | Scarlets | Royal Dublin Society | 15,627 | Report |
| Sun 24 Feb | 15:00 |
| Treviso | 34 - 10 | Munster | Stadio di Monigo | 2,200 | Report |
| Sun 24 Feb | 15:05 |
| Zebre | 13 - 14 | Dragons | Stadio XXV Aprile | 400 | Report |
| March 2013 |
| Fri 1 Mar | 19:00 |
| Dragons | 19 - 26 | Leinster | Rodney Parade | 4,258 | Report |
| Fri 1 Mar | 19:05 |
| Scarlets | 14 - 13 | Edinburgh | Parc y Scarlets | 6,314 | Report |
| Fri 1 Mar | 19:05 |
| Ulster | 29 - 29 | Treviso | Ravenhill | 10,678 | Report |
| Fri 1 Mar | 19:35 |
| Glasgow | 29 - 13 | Blues | Scotstoun | 3,807 | Report |
| Fri 1 Mar | 19:45 |
| Connacht | 23 - 19 | Zebre | Sportsground | 4,856 | Report |
| Sat 2 Mar | 18:30 |
| Munster | 13 - 13 | Ospreys | Thomond Park Stadium | 17,748 | Report |
| Fri 22 Mar | 19:00 |
| Zebre | 10 - 24 | Scarlets | Stadio XXV Aprile | 1,100 | Report |
| Fri 22 Mar | 19:05 |
| Ospreys | 52 - 19 | Dragons | Liberty Stadium | 9,935 | Report |
| Fri 22 Mar | 19:30 |
| Edinburgh | 14 - 8 | Ulster | Murrayfield | 4,714 | Report |
| Sat 23 Mar | 17:45 |
| Munster | 22 - 0 | Connacht | Musgrave Park | 8,203 | Report |
| Sat 23 Mar | 19:30 |
| Treviso | 26 - 17 | Blues | Stadio di Monigo | 2,600 | Report |
| Sat 23 Mar | 19:45 |
| Leinster | 22 - 17 | Glasgow | Royal Dublin Society | 16,156 | Report |
| Fri 29 Mar | 19:00 |
| Zebre | 7 - 9 | Edinburgh | Stadio XXV Aprile | 1,800 | Report |
| Fri 29 Mar | 20:05 |
| Glasgow | 51 - 24 | Munster | Scotstoun | 5,692 | Report |
| Sat 30 Mar | 14:30 |
| Dragons | 20 - 28 | Scarlets | Millennium Stadium | 36,174 | Report |
| Sat 30 Mar | 17:15 |
| Blues | 16 - 23 | Ospreys | Millennium Stadium | 36,174 | Report |
| Sat 30 Mar | 18:15 |
| Leinster | 18 - 22 | Ulster | Royal Dublin Society | 18,500 | Report |
| April 2013 |
| Fri 12 Apr | 19:05 |
| Scarlets | 29 - 6 | Glasgow | Parc y Scarlets | 6,901 | Report |
| Fri 12 Apr | 19:05 |
| Ulster | 31 - 5 | Dragons | Ravenhill | 9,647 | Report |
| Fri 12 Apr | 19:30 |
| Edinburgh | 24 - 32 | Connacht | Murrayfield | 4,171 | Report |
| Sat 13 Apr | 14:30 |
| Blues | 28 - 13 | Zebre | Cardiff Arms Park | 9,769 | Report |
| Sat 13 Apr | 18:30 |
| Munster | 16 - 22 | Leinster | Thomond Park Stadium | 23,037 | Report |
| Sat 13 Apr | 18:30 |
| Ospreys | 28 - 3 | Treviso | Liberty Stadium | 9,138 | Report |
| Fri 19 Apr | 19:00 |
| Dragons | 30 - 24 | Munster | Rodney Parade | 7,523 | Report |
| Fri 19 Apr | 19:35 |
| Glasgow | 35 - 17 | Ospreys | Scotstoun | 6,642 | Report |
| Fri 19 Apr | 19:45 |
| Connacht | 18 - 34 | Ulster | Sportsground | 6,463 | Report |
| Fri 19 Apr | 20:30 |
| Treviso | 30 - 10 | Edinburgh | Stadio di Monigo | 3,200 | Report |
| Sat 20 Apr | 18:30 |
| Scarlets | 24 - 6 | Blues | Parc y Scarlets | 10,426 | Report |
| Sun 21 Apr | 16:00 |
| Zebre | 22 - 41 | Leinster | Stadio del Tricolore | 4,700 | Report |
| Fri 26 Apr | 20:30 |
| Treviso | 23 - 23 | Connacht | Stadio di Monigo | 4,850 | Report |
| May 2013 |
| Fri 3 May | 19:45 |
| Connacht | 3 - 20 | Glasgow | Sportsground | 6,081 | Report |
| Fri 3 May | 19:45 |
| Edinburgh | 31 - 24 | Dragons | Murrayfield | 3,660 | Report |
| Fri 3 May | 19:45 |
| Leinster | 37 - 19 | Ospreys | Royal Dublin Society | 17,583 | Report |
| Fri 3 May | 19:45 |
| Scarlets | 17 - 41 | Treviso | Parc y Scarlets | 9,129 | Report |
| Fri 3 May | 19:45 |
| Ulster | 37 - 13 | Blues | Ravenhill | 10,700 | Report |
| Fri 3 May | 19:45 |
| Zebre | 25 - 27 | Munster | Stadio XXV Aprile | 2,500 | Report |
| Fri 10 May | 19:45 | PO | Ulster | 28 - 17 | Scarlets | Ravenhill | 10,700 | Report |
| Sat 11 May | 19:35 | PO | Leinster | 17 - 15 | Glasgow | Royal Dublin Society | 13,235 | Report |
| Sat 25 May | 16:45 | F | Ulster | v | Leinster | Royal Dublin Society | NI/RTE/ALBA | More |
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