Portsmouth Property Tax Calculator
In Portsmouth, New Hampshire, the median property tax bill is $7,876 a year on a home worth around $640,600 — an effective rate of 1.23% of value. That is the lowest rate of the 26 New Hampshire cities with Census data (state average 1.5%). On a $350,000 home that works out to about $4,305/year ($359/month in escrow). Enter your home value below.
$3,850 / year
$320.83/month in escrow · effective rate 1.10% of value
Effective rates are state averages (Tax Foundation / Census ACS). Your local rate, assessment ratio and exemptions vary by county — adjust the rate for an exact bill. How we calculate →
Portsmouth property tax rate vs the rest of New Hampshire
Portsmouth has an effective property tax rate of 1.23% — its median real-estate tax bill ($7,876) as a share of its median home value ($640,600). That is below New Hampshire's 1.5% state average, and ranks the lowest of the 26 New Hampshire cities we track.
Your bill is set by overlapping local taxing bodies — the city, the county, and the school district — so the same home value in a neighbouring town can owe a very different amount. The calculator above starts from Portsmouth's 1.23% effective rate; adjust it to your exact parcel or add a homestead exemption for a closer estimate.
Property tax by home value in Portsmouth
Estimated annual Portsmouth property tax at its 1.23% effective rate:
$250,000 home → $3,075/yr · $350,000 home → $4,305/yr · $500,000 home → $6,150/yr.
Divide by 12 for the monthly escrow your mortgage servicer collects — about $359/month on a $350,000 home. These figures use the city effective rate; your exact local rate and any exemptions change the final bill.
How affordable is property tax in Portsmouth?
The typical Portsmouth homeowner pays about $7,876 in property tax against a median household income of $105,756 — roughly 7.4% of income a year. That ratio is a quick way to weigh the real burden of property tax, since a modest rate on an expensive home can still be a large dollar bill.
How Portsmouth property tax is calculated
Your assessor sets Portsmouth's assessed value, and local millage rates from the city, county and school district are applied to it; the 1.23% effective rate rolls all of that into one share of market value. To estimate your tax, multiply your home value by 1.23% (or your exact local rate), then subtract any homestead or senior exemption you qualify for. The calculator above does this and shows both the annual bill and the monthly escrow amount.
Portsmouth property tax — frequently asked questions
What is the property tax rate in Portsmouth, New Hampshire?
Portsmouth's effective property tax rate is 1.23% of home value in 2026 — its median $7,876 bill on a median $640,600 home. That is the lowest of the 26 New Hampshire cities we track, where the state average is 1.5%.
How much is property tax on a $350,000 home in Portsmouth?
At Portsmouth's 1.23% effective rate, a $350,000 home owes about $4,305 a year — roughly $359 a month through escrow. Your exact parcel and any exemptions can move this up or down.
Is property tax high in Portsmouth?
Portsmouth ranks the lowest of the 26 New Hampshire cities by effective rate (1.23% vs the 1.5% state average), so it is on the lower side for New Hampshire. The median bill is $7,876 a year.
What is the median property tax in Portsmouth?
The median Portsmouth homeowner pays about $7,876 a year, on a median home value of around $640,600 — an effective rate near 1.23% (US Census ACS).
How is Portsmouth property tax calculated?
Multiply your home's value by Portsmouth's effective rate (1.23%, or your exact local millage), then subtract any homestead exemption. The assessor sets the assessed value and local bodies set the rates; the calculator above estimates the annual and monthly amounts.
Compare nearby cities in New Hampshire
See all 26 New Hampshire cities ranked by property tax rate, or compare:
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →