Rose Byrne, Stephen Merchant and Rafe Spall's new comedy debuts in first place with first-weekend takings of almost AU$1.4 million.
Jennifer Lawrence's Oscars success helps to move Silver Linings Playbook up one place to second, while Side Effects is another new entry in third position.
Cloud Atlas also makes its box office debut this week, grossing just over AU $350,000 in tenth place.
The box office chart for the weekend of February 28 to March 3 (all figures are in Australian dollars):
1. (-) I Give It a Year - $1,395,053
2. (3) Silver Linings Playbook - $1,044,531
3. (-) Side Effects - $841,279
4. (4) Hansel & Gretel: Witch Hunters - $709,853
5. (1) Beautiful Creatures - $680,791
6. (5) Lincoln - $677,459
7. (2) Safe Haven - $621,282
8. (6) Django Unchained - $568,471
9. (7) The Last Stand - $374,497
10. (-) Cloud Atlas - $355,007
Watch Rose Byrne and Rafe Spall talking to Digital Spy about I Give It a Year below:
'I Give It a Year' character posters - gallery: