Property Tax Rate vs Effective Tax Rate: What Is the Difference
TL;DR
The stated property tax rate (or nominal rate) is the official rate applied to your assessed value. The effective tax rate is the actual percentage of your home's market value that you pay in taxes. These numbers differ because many states assess property at a fraction of market value and because exemptions reduce the taxable base. The effective rate is the better number for comparing tax burdens across states and jurisdictions. A state with a high nominal rate but low assessment ratio can have a lower effective rate than a state with a low nominal rate and 100% assessment.
Nominal (Stated) Tax Rate
The nominal rate is the official rate set by taxing authorities, expressed as mills (per $1,000), per $100, or as a percentage. This rate is applied to your assessed value to calculate your tax bill.
Example: 30 mills applied to $100,000 assessed value = $3,000 tax
Effective Tax Rate
The effective rate is your actual tax payment divided by your property's market value. It shows what percentage of your home's true value you pay in taxes.
Effective Rate = Taxes Paid / Market Value
Why They Differ
| State | Assessment Ratio | Nominal Rate | Effective Rate on $300K Home |
|---|---|---|---|
| Ohio | 35% | 65 mills | ~2.27% ($6,825) |
| South Carolina | 4% (owner-occ) | 300 mills | ~1.20% ($3,600) |
| Georgia | 40% | 30 mills | ~1.20% ($3,600) |
| New Jersey | 100% | 22 mills | ~2.20% ($6,600) |
South Carolina has a nominal rate of 300 mills, which sounds enormous, but because it is applied to only 4% of market value, the effective rate is moderate.
Which Number to Use
- For comparing states or counties: Use the effective rate. It is the only apples-to-apples comparison.
- For calculating your bill: Use the nominal rate applied to your assessed value.
- For evaluating whether you are overpaying: Compare your effective rate to the average effective rate in your area. If yours is significantly higher, your assessment may be inflated.
Our free property tax analyzer calculates your effective rate and compares it to local averages. If your effective rate is higher than it should be, an assessment appeal could bring it in line.
Frequently Asked Questions
How do they compare in terms of property tax rate vs effective tax rate: what is the difference?
The stated property tax rate (or nominal rate) is the official rate applied to your assessed value. The effective tax rate is the actual percentage of your home's market value that you pay in taxes. These numbers differ because many states assess property at a fraction of market value and because exemptions reduce the taxable base.
What should I know about nominal (stated) tax rate?
The nominal rate is the official rate set by taxing authorities, expressed as mills (per $1,000), per $100, or as a percentage. This rate is applied to your assessed value to calculate your tax bill.
What should I know about effective tax rate?
The effective rate is your actual tax payment divided by your property's market value. It shows what percentage of your home's true value you pay in taxes.
Why They Differ?
South Carolina has a nominal rate of 300 mills, which sounds enormous, but because it is applied to only 4% of market value, the effective rate is moderate.
What should I know about which number to use?
Our free property tax analyzer calculates your effective rate and compares it to local averages. If your effective rate is higher than it should be, an assessment appeal could bring it in line.