Labor's plans to increase capital gains tax and limit negative gearing will hit the nation's wealthiest and largely Liberal-held electorates, sparing those in low income rural areas or comfortably held by the ALP.

A special breakdown of Tax Office data covering average negative gearing losses and the average capital gains discount enjoyed by taxpayers shows Labor's policies will hit hardest voters in areas least likely to back the ALP at this year's election.

Taxpayers in the former seat of Malcolm Turnbull, Wentworth in Sydney's eastern suburbs, and those in the Melbourne seat of Higgins, held by Industrial Relations Minister Kelly O'Dwyer, are the most exposed to Labor's plans.

Taxpayers in Malcolm Turnbull's former seat of Wentworth are most exposed to Labor's capital gains tax and negative gearing changes. Credit:Janie Barrett

The ALP wants to raise $32 billion over the next decade by halving the concession on capital gains tax and to limit negative gearing to people who invest in new rental properties. People with existing rentals would have their investment grandfathered.