Several Government politicians are using a loophole to own properties which are not declared and claim up to $78,000 in taxpayer-funded subsidies each year to pay off the mortgage.

A Herald investigation of property records for all 121 members of Parliament has discovered that six National MPs use their private superannuation schemes to own property that does not need to be disclosed - unlike assets held in trusts. This is because of an exception in the rules of the Register of Pecuniary Interests.

All six - Chester Borrows, Simon Bridges, Anne Tolley, Chris Auchinvole, Peseta Sam Lotu-Iiga and Mike Sabin - live in the Wellington properties while working in the capital and claim the accommodation allowance or expenses.

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