The Government plans to tax lease inducements, which are cash payments from landlords to prospective tenants to sign a commercial lease.
Such payments are "typically" tax deductible to the landlords paying them but tax-free to the tenants receiving them, it says.
That creates an incentive for the parties to sign a lease agreement which results in a tax advantage benefiting one of the parties or both, at the expense of the Government's revenue.
Tax audits are turning up more of these payments, Inland Revenue says.
Other forms of inducement such as reduced rents or rental holidays do not pose the same risk to revenue because the tax treatment is symmetrical - reducing the tenant's deductible expenses but also the landlord's taxable income.