A Portsmouth NH property tax card is the city’s official record of a parcel’s physical details, ownership, and assessed value, and you can pull any card free through the Vision Government Solutions database at gis.vgsi.com/portsmouthnh.1Vision Government Solutions. Portsmouth, NH The card is the foundation for your tax bill, so reading it carefully is the first step toward catching an error, claiming an exemption, or building an abatement case.
How to Look Up a Property Tax Card
The Vision Government Solutions site lets you search by property address, owner name, or Map and Lot number.1Vision Government Solutions. Portsmouth, NH The Map and Lot number is the parcel ID assigned by the city and gives you the most reliable hit, especially when several properties share a similar address or an owner appears on multiple records.
Select a property from the results and the system generates a digital tax card with current and historical assessment data, ownership details, and the physical description of the parcel. You never have to visit the Assessing Department to see it. Portsmouth also links a MapGeo mapping tool from the Assessing Department’s page that lets you browse properties on an interactive map and reach the same underlying data.2City of Portsmouth NH. Assessing Department
What the Card Tells You
The card is the city’s profile of your property. It lists total square footage, year built, architectural style (colonial, cape, ranch, and so on), and a room-by-room count with bedrooms and bathrooms. Land details include acreage and zoning classification, both of which feed into the site value.
A separate section splits the assessed value into two parts: land and improvements. “Improvements” is the assessing term for any buildings or structures on the lot. Add them together and you have the total assessed value, which is what the city uses to figure your tax bill.
This is where errors bite. An extra bedroom the card claims you have, a finished basement that is actually unfinished, wrong square footage — any of these inflate your value and your bill. Compare the card to the property as it really exists before you do anything else. It is the single most useful check available to you.
How the Assessment Becomes a Tax Bill
Portsmouth’s property tax rate for 2025 is $11.51 per $1,000 of assessed value.3City of Portsmouth NH. City of Portsmouth NH Property Tax Rate Set at $11.51 Divide your total assessed value by 1,000 and multiply by the rate. A property assessed at $500,000 owes $5,755 for the year. The city posts an online tax calculator that does the arithmetic for you.4City of Portsmouth NH. Online Property Tax Calculator
The rate resets each year based on the city budget, school funding, county obligations, and the total assessed value of all property in Portsmouth. New Hampshire law requires every municipality to reappraise real estate at full market value at least once every five years, meaning the price a property would fetch in a normal sale between a willing buyer and willing seller.5New Hampshire General Court. New Hampshire Code 75-8-a – Five-Year Valuation6New Hampshire General Court. New Hampshire Code 75-1 – How Appraised Portsmouth completed its most recent revaluation for the 2024 tax year, using Vision Government Solutions to update values citywide.1Vision Government Solutions. Portsmouth, NH When values rise across the board, the rate usually drops so total revenue stays roughly the same, though your individual bill can still move up or down depending on how your value shifted relative to your neighbors’.
Credits and Exemptions That Lower the Bill
Portsmouth offers several programs that reduce your tax bill, but none is automatic. You have to apply, and the general filing deadline for exemptions and credits is April 15 of the tax year.
Veterans Tax Credit
Portsmouth has adopted the optional veterans tax credit at $750 per year, the maximum allowed under state law.7New Hampshire General Court. New Hampshire Code 72-28 – Standard and Optional Veterans Tax Credit You must be a New Hampshire resident who served at least 90 days of active duty in a qualifying war or armed conflict and received an honorable discharge. Spouses and surviving spouses of qualifying veterans are also eligible. Veterans with a service-connected total disability get a separate $700 credit under RSA 72:35.8City of Portsmouth NH. Tax Credits for Veterans
Elderly Exemption
If you are 65 or older, have lived in New Hampshire for at least three consecutive years, and meet income and asset limits set by the city, you may qualify for an elderly exemption that reduces your assessed value before the tax rate is applied.9New Hampshire General Court. New Hampshire Code 72-39-a – Conditions for Elderly Exemption The exemption amount and qualifying thresholds vary by age bracket and are adopted locally by the City Council, so they can change year to year. As of early 2026, Portsmouth was actively reviewing proposals to adjust its income and asset limits for the current tax year. Contact the Assessing Department for the current numbers. The filing deadline is April 15, 2026 for the December 2026 tax bill.10City of Portsmouth NH. City Council Holds Public Hearings and City Staff Host a Lunch-and-Learn on Tax Relief for Veterans, the Elderly, and Disabled
Disability Exemption
New Hampshire municipalities can adopt an exemption for residents under 65 who receive Social Security disability benefits under Title II or Title XVI. This exemption, authorized by RSA 72:37-b, reduces assessed value by an amount the city sets locally, subject to income and asset limits. The application deadline is April 15.
Filing an Abatement If Your Assessment Is Wrong
If the card shows physical errors, or if your assessed value is out of line with actual market value, you can apply for an abatement — a formal request to reduce the assessment. The window opens after the final tax bill of the year, and the deadline is March 1 following your notice of tax.11New Hampshire General Court. New Hampshire Code 76-16 – By Selectmen or Assessors Miss it and you lose the right to challenge the assessment for that tax year.
Use the form prescribed by the Board of Tax and Land Appeals. It requires you to state with specificity why the assessment is wrong.11New Hampshire General Court. New Hampshire Code 76-16 – By Selectmen or Assessors “My taxes are too high” won’t move the needle. Strong applications rest on one or more of the following:
- Errors on the tax card, such as wrong square footage, incorrect room counts, or a finished basement that isn’t actually finished. This is the low-hanging fruit, and it’s why checking your card first matters.
- Recent sales of comparable properties that sold for less than your assessed value. Exclude foreclosures and bank-owned sales, which typically sell below market and won’t help your case.
- A USPAP-compliant professional appraisal of your property. If the appraisal was done for a lender in a refinance or purchase, you’ll need written authorization from both the lender and the appraiser before the city can use it.
- For rental or commercial properties, an income analysis showing the property’s earnings don’t support the assessed value.
The city has until July 1 to issue a written decision granting or denying the abatement.11New Hampshire General Court. New Hampshire Code 76-16 – By Selectmen or Assessors If the city denies your request, or fails to respond by that date (which counts as a denial), you can appeal to either the Board of Tax and Land Appeals or the Superior Court, but not both.12Board of Tax and Land Appeals. Property Tax A BTLA appeal requires a $65 filing fee and must be filed by September 1 following your notice of tax.13New Hampshire General Court. New Hampshire Code 76-16-a – By Board of Tax and Land Appeals You cannot file the appeal before either the city issues its decision or July 1 arrives, whichever comes first.