Portsmouth, Rockingham County, New Hampshire Property Taxes
Property Taxes in Portsmouth, New Hampshire
Median Portsmouth, New Hampshire effective property tax rate: 1.12%, significantly lower than the national median of 1.02%, and lower than the New Hampshire state median of 1.82%.
Median Portsmouth, New Hampshire home value: $698,300
Median annual Portsmouth, New Hampshire tax bill: $7,797, higher than the national median property tax bill of $2,400.
How are property taxes in Rockingham calculated?
Property taxes in Portsmouth, New Hampshire are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Portsmouth's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Portsmouth, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Portsmouth, Rockingham County, New Hampshire Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.12%
Estimate Property Tax Bill
$7,821
$7,258
How Does the Portsmouth Property Tax Calculator Work?
Use this Portsmouth property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Portsmouth's median effective tax rate of 1.12% — based on actual property records in Rockingham County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment process uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Portsmouth's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Portsmouth: rates range from 1.12% in 03801 to 1.12% in 03801, primarily due to differences in school district levies and local assessment districts.
For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Portsmouth.
About Portsmouth Property Taxes
About Property Taxes in Portsmouth, Rockingham, New Hampshire
Portsmouth’s median effective property tax rate of 1.12% is higher than the New Hampshire state median of 1.82% and higher than the national median of 1.02%. This rate reflects the Rockingham County base levy combined with local school district levies and special assessment districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Portsmouth. Homeowners in the 03801 ZIP code carry a median effective rate of 1.12%, while those in 03801 pay 1.12%. This spread — 0 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Rockingham County. Understanding which part of Portsmouth you live in can make a meaningful difference to your annual tax bill.
Portsmouth homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the September 1, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Portsmouth, Rockingham County, New Hampshire
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Portsmouth's effective property tax rate to other cities in New Hampshire and the median property tax rates in New Hampshire and the U.S.
Property Tax Rates Across Portsmouth, Rockingham County, New Hampshire
Source: Ownwell
0.54%
1.59%
2.64%
Our median effective property tax rate (tax bill Ă· assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Portsmouth Tax Rate
1.12%
Our median effective property tax rate (tax bill Ă· assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Rockingham County Tax Rate
1.76%
Median Effective New Hampshire Tax Rate
1.82%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Portsmouth, Rockingham County, New Hampshire
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 03801 | 1.12% | 1.12% | 1.12% | 1.12% | 1.12% |
Source: Ownwell
Property Tax Assessment Values Across Portsmouth, Rockingham County, New Hampshire
When examining property taxes in Portsmouth, New Hampshire, understanding the distinction between market value and assessed value is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Rockingham County assessor estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices are sent in the spring each year and typically reach your mailbox by the middle of the month. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill.
For example, the median home price in Portsmouth is $698,300, with a median tax bill of $7,797. The 25th percentile tax bill is $5,561, while the 75th percentile is $11,457 and the 90th percentile reaches $15,573.
Property Tax Assessment Values Across Portsmouth, Rockingham County, New Hampshire
Source: Ownwell
$279,600
$1,054,050
$1,828,500
Median Portsmouth Market Value
$698,300
Median Rockingham County Market Value
$463,200
Median New Hampshire Market Value
$360,500
Median United States Market Value
$235,294
Property Tax Assessment Values Across Portsmouth, Rockingham County, New Hampshire
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 03801 | $340,960 | $497,600 | $698,300 | $1,026,400 | $1,395,840 |
Source: Ownwell
Property Tax Bills Across Portsmouth, Rockingham County, New Hampshire
Property tax bills in Portsmouth are calculated by applying the local tax rate to a home’s assessed value, which is based on the property’s market value. The assessed value is then used to determine how much tax a homeowner owes each year, so changes in the market can affect the bill.
With a median home price of $698,300, Portsmouth homeowners often face bills that are well above the national median property tax bill of $2,400. The typical tax burden in the city can vary widely, with the 25th percentile at $5,561, the 75th percentile at $11,457, and the 90th percentile reaching $15,573.
These bills can have a major impact on household budgets, especially for homeowners whose property values have risen quickly. In Portsmouth, the tax bill is a significant ongoing cost that reflects both local assessment practices and the value of the home itself.
Property Tax Bills Across Portsmouth, Rockingham County, New Hampshire
Source: Ownwell
$5,478
$10,657
$15,835
Median Portsmouth Tax Bill
$7,797
Median Rockingham County Tax Bill
$7,771
Median New Hampshire Tax Bill
$6,530
Median United States Tax Bill
$2,400
Property Tax Bills Across Portsmouth, Rockingham County, New Hampshire
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 03801 | $3,807 | $5,561 | $7,797 | $11,457 | $15,573 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | March 1 |
Links | |
|---|---|
| Rockingham Tax Assessor | |
| Website | www.nhdeeds.org |