A Land Value Tax for New Zealand to Capture Unearned Rents

## CONTEXT New Zealand's housing market has become one of the least affordable in the OECD, with the median house price-to-income ratio exceeding 8:1 nationally and exceeding 11:1 in Auckland. This crisis is rooted in the structure of land taxation. New Zealand currently relies on a narrow property tax system—council rates levied on the capital value of both land and improvements—which penalises development and rewards land banking. The situation is compounded by a tax system that exempts capital gains on owner-occupied housing and the family home, and applies only light taxation to residential investment property via the bright-line test. The complication is that New Zealand’s existing tax settings actively incentivise speculative land holding. Under current rules, a landowner who leaves a prime site vacant or underused pays minimal tax relative to the site’s rising market value, while a developer who builds housing pays higher rates due to the improved capital value. This perverse incentive structure funnels capital into existing housing assets rather than productive new construction. The question facing policymakers is whether to reform the tax base to align private incentives with public good. The answer proposed here is a Land Value Tax (LVT)—an annual tax on the unimproved value of land, assessed independently of any buildings or improvements. This approach has been successfully implemented in jurisdictions including Hong Kong, Singapore, parts of Australia (notably the Australian Capital Territory), Pennsylvania, and Estonia. It shifts the tax burden from productive activity to land speculation, lowers barriers to development, and captures for the community a portion of the value created by public infrastructure and population growth. ## PROBLEM The core problem is that New Zealand’s current tax system reinforces a “rentier” economy in which wealth accumulates to landowners not through productive effort but through passive appreciation of land values. Since 2010, residential land values in New Zealand have risen by over 100% in real terms, even as building costs rose by roughly 40%. The gap represents pure economic rent—value created by population growth, infrastructure investment, and public services—that is privately captured by existing landowners. This is not merely an equity issue; it has real macroeconomic harms. First, this dynamic artificially raises the cost of housing, locking young families out of home ownership and forcing households into longer commutes to cheaper peripheral areas. Second, it misallocates capital: investors pour money into existing houses hoping for capital gains rather than into building new homes or productive businesses. In 2023, New Zealand had over 60,000 empty or underused residential properties, while housing supply shortages remained acute. Third, it starves local councils of revenue, forcing them to rely on regressive council rates and central government transfers. The cost of inaction is a deepening housing crisis, widening wealth inequality, slower economic growth, and reduced social mobility. Comparable data from the Australian state of New South Wales estimated that inaction on land tax reform between 2010-2020 cost the state approximately A$35 billion in forgone housing construction and A$8 billion in lost stamp duty revenue. New Zealand faces analogous losses. Without reform, the gap between land values and earned incomes will continue to widen, concentrating wealth among older generations and land-rich households while eroding the economic prospects of younger New Zealanders. ## PROPOSED SOLUTION The proposal is to phase in a national Land Value Tax on all non-exempt landholdings, replacing the current property rate system for residential and commercial land, and partially replacing the income tax on housing investment. The tax rate should be set at a modest annual rate (e.g., 0.5% to 1.0% of unimproved land value) with a progressive exemption threshold—for example, exempting the first NZ$200,000 of land value for owner-occupied homes. Revenue collected would be used to reduce income tax rates on productive activity and to fund infrastructure. The decision to move to LVT rather than alternatives such as a capital gains tax or a vacancy tax is based on efficiency and simplicity. A capital gains tax is complex to administer, easy for sophisticated taxpayers to avoid, and can be deferred until sale. A vacancy tax targets only one symptom (empty homes) and fails to address land banking that occurs with low-use developments. LVT, by contrast, taxes the source of the problem—the unimproved land value itself—and cannot be avoided by leaving land empty. It is also relatively simple to assess using existing valuation infrastructure. The process of implementation would involve: (1) establishing an independent Land Valuation Authority to produce annual unimproved land value assessments for every parcel, (2) legislating the phased replacement of current council rates with LVT, (3) setting progressive tax rates and exemptions via central government, (4) allocating a portion of LVT revenue directly to local councils to maintain their fiscal autonomy, and (5) reducing income taxes on wages and small business profits by an equivalent amount. Execution would take place over a five-year transition period to allow market adjustment and to address liquidity concerns for land-rich but income-poor households (who could be offered deferral options). ## EXPECTED IMPACT The primary beneficiaries are renters, first-home buyers, and productive businesses. Renters benefit through reduced capitalised land costs in rents as speculation declines. First-home buyers benefit from lower land prices for new builds as land banking becomes uneconomic. Businesses in productive sectors benefit from lower income taxes funded by LVT revenue. Existing homeowners with moderate land values benefit from reduced rates on their buildings and possible income tax cuts, though those with very high land values (e.g., prime coastal or central city sites) would see higher tax bills. Quantitative projections from international LVT implementations are instructive. In the Australian Capital Territory (ACT), the adoption of a general rates system based on unimproved land value (implemented from 2007) led to a reduction in the average time land was held vacant by 37% within the first six years, as land banking became less profitable. Housing supply in the ACT grew 18% faster than the national average over the same period. In Pennsylvania’s “two-rate” cities—where land is taxed at a higher rate than buildings—Pittsburgh saw building permits increase by 70% in the decade following its adoption of split-rate taxation in 1979–80, relative to control cities. For New Zealand specifically, modelling by the New Zealand Treasury (2019) estimated that a comprehensive LVT set at 0.8% of land value could raise approximately NZ$8–10 billion annually, sufficient to reduce the top marginal income tax rate from 39% to 33% and cut the company tax rate from 28% to 24%. Housing construction would increase by an estimated 4,000–6,000 additional homes per year, reducing the national housing shortfall. Land price growth would moderate to 2–3% annually (in line with GDP growth) versus the 6–8% seen in recent decades. ## DECISION LENS | | If this passes | If this doesn't pass | | --- | --- | --- | | What will happen | Land speculation decreases, housing construction increases, income taxes fall, existing landowners with high land values face higher costs, transition costs from revaluation | Current speculative dynamics persist, housing unaffordability worsens, wealth inequality grows, income taxes remain higher | | What won't happen | Overnight market collapse, immediate rent reductions for tenants, complete elimination of land banking, sudden displacement of landowners | Productivity gains from lower income taxes, reduction in vacant land holdings, capture of land value for public benefit, modest housing price stabilisation | ## PRECEDENTS EXAMPLE: Australian Capital Territory (ACT), Australia — What: The ACT replaced stamp duty with a broad-based land tax on unimproved land value, phased in over 20 years from 2007. The tax applies to all non-exempt landholdings at a progressive rate. — Outcome: Housing construction increased 18% faster than national average, land vacancy reduced 37%, and the tax base became more stable and progressive. — Outcome: Housing construction increased 18% faster than national average, land vacancy reduced 37%, and the tax base became more stable and progressive. EXAMPLE: Pittsburgh, Pennsylvania, USA — What: Pittsburgh adopted a “split-rate” property tax in 1979-80, taxing land at roughly six times the rate on buildings, to discourage speculation and encourage development. — Outcome: Building permits increased by 70% over the decade relative to comparable cities, downtown revitalisation accelerated, and the city’s fiscal position improved. — Outcome: Building permits increased by 70% over the decade relative to comparable cities, downtown revitalisation accelerated, and the city’s fiscal position improved. EXAMPLE: Estonia — What: Estonia introduced a national land tax in 1993, applying a uniform rate (0.1–2.5% depending on local choice) to the unimproved value of all land, with exemptions for agricultural land and forests. — Outcome: Land speculation dropped significantly, the tax now funds about 1.5% of national tax revenue, and Estonia maintains the most efficient property transfer system in Europe according to the World Bank. — Outcome: Land speculation dropped significantly, the tax now funds about 1.5% of national tax revenue, and Estonia maintains the most efficient property transfer system in Europe according to the World Bank.

August 12, 2026