Travis Bunn
Founder, AppealDesk · Published March 27, 2026 · Updated August 25, 2026
Enter your address to see if your home may be overassessed. Takes 60 seconds.
$49 flat fee · No percentage of savings · No hidden costs
Updated August 2026
New Hampshire has one of the highest effective property tax rates in the country, 2.09% on a median home value of $339,000, which works out to roughly $7,085 a year. Yet the state never mails you anything resembling a Notice of Value. Property is assessed every year as of April 1 under RSA 74:1, at 100% of full and true value under RSA 75:1, but your town's assessors do not revalue every parcel every year. Under RSA 75:8-a they are required to conduct a full reappraisal of the entire town at least once every five years, and hold values essentially flat in between. So most years, nothing changes and nobody hears anything. The year your town does revalue, there is still no separate letter telling you your new number. You find out because the second half of your property tax bill, the one that lands in your mailbox every fall, shows it.
That fall bill exists because New Hampshire towns bill twice a year under RSA 76:15-a: a July estimate based on last year's value and half of last year's rate, then a December bill for whatever is actually owed once the new rate and value are set. The December bill is what state law calls the "notice of tax" (RSA 76:1-a), and it is also the trigger for the only deadline that matters if you think your home is over-assessed: an abatement application with your town's selectmen or assessors, due by March 1, not of the same year, but of the year after that fall bill went out (RSA 76:16). Meanwhile your mortgage servicer has already paid both the July estimate and the December bill in full, at whatever number the town sent, months before your March 1 filing deadline even opens.
Check your property record and relevant sales, then confirm the current local appeal window.
Unlike states that assess at a fraction of market value, New Hampshire assesses at 100% of full and true value under RSA 75:1. There is no ratio to multiply, no capped intermediate value standing between what the assessor wrote down and what your tax bill is based on. The number on your fall bill is supposed to equal what your home would sell for, full stop. That makes an over-assessment claim in New Hampshire more direct than in states with an Arizona-style limited value or a California-style factored base year: if you can show your assessed value sits above what comparable homes in your neighborhood actually sold for around the April 1 assessment date, a successful abatement moves your tax bill dollar for dollar, the same year it is granted, with no lag while some other capped number catches up.
The catch is that most of the evidence behind your number is stale by the time you see it. Your town's last town-wide reappraisal could be up to five years old under RSA 75:8-a, and values are typically held flat in the years between. The number on your fall bill might reflect market conditions from years ago, not the comparable sales happening today. That cuts both ways: a home that has fallen in relative value since the last reval might be over-assessed for reasons that have nothing to do with an error, just aging data. Pull comparable sales from around your town's actual assessment date, not just recent sales, before you file.
New Hampshire's appeal path is shorter than many states in this series, just two stops, but each one runs on its own clock measured from that December "notice of tax," not from a fixed calendar date:
Unlike states in this series where a board or court level runs weeks or months to an unpredictable hearing date, both of New Hampshire's second-level paths converge on the same September 1 checkpoint. There is no independent Board of Tax and Land Appeals or Superior Court filing available without first going through your town, so a homeowner who misses the March 1 abatement deadline has no fallback in either direction for that year.
Review the notice, filing instructions, and evidence requirements before ordering a packet.
Federal law, not New Hampshire law, governs what your mortgage servicer does with your escrow account. Under Regulation X, 12 CFR 1024.17(c)(3), your servicer must run an escrow analysis once per computation year, a twelve-month cycle tied to your loan, not to your town's billing calendar. That analysis simply pays whatever the town billed, in July and again in December, and neither payment waits to see whether you plan to file an abatement.
This is where New Hampshire's math gets uncomfortable. By the time your December bill reveals a number you might want to contest, your servicer has already disbursed both halves of that year's tax in full, at the value you have not yet had a chance to appeal. Your March 1 deadline to even start the abatement process falls after the entire year's escrow disbursement is already done. There is no point in New Hampshire's cycle where a homeowner can file first and have escrow catch the correction before paying. The best you can do is file by March 1, and let your win reach your account whenever it reaches your assessed value on the town's roll.
Say a homeowner in Rockingham County owns a home the town lists at New Hampshire's median value, $339,000. At the state's 100% assessment ratio, that is the full assessed value; at New Hampshire's 2.09% effective rate, that works out to roughly $7,085 in annual property tax, in line with the state's median annual tax bill. (Rates are set locally and vary town to town, so treat this as illustration, not a quote.) Her town revalues that year for the first time in five years, and the new value shows up on her December fall bill with no advance warning. She spends the winter pulling comparable sales and files her abatement application with the selectmen on February 20, just ahead of the March 1 deadline.
Both installments of that year's tax were already paid through escrow, at the disputed number, before she ever had a reason to question it. The abatement fixes next year's bill and, once her servicer catches the correction, refunds the overage on this one. It does not undo the fact that her escrow account funded a full year at a number she had no chance to see coming until the very bill that started her clock.
Check the taxable value, exemptions, and applicable dates before estimating a possible tax reduction.
Whether the selectmen grant your abatement outright or you win later at the Board of Tax and Land Appeals or Superior Court, the mechanics from there are the same as everywhere else in this series. Your town corrects the roll and issues a credit or refund for the amount already overpaid, and none of that touches your monthly mortgage payment until your servicer sees it. Three federal rules in 12 CFR 1024.17 control what happens next:
If your case went all the way to the Board of Tax and Land Appeals or Superior Court and took the better part of a year, do not assume your servicer is tracking it. Nobody in the escrow department is watching that docket for you. The corrected bill from your town is the only document that moves your payment, so keep a copy of the decision and the revised assessment, and send both the moment they arrive.
The highest-volume appeal jurisdictions in New Hampshire are Hillsborough, Rockingham, and Merrimack counties, home to Manchester, Nashua, and Concord along with dozens of smaller towns that each run their own assessing office and their own reappraisal schedule. Because RSA 75:8-a lets every town choose when within its five-year window to revalue, two towns a few miles apart can be on completely different assessment cycles even within the same county. Confirm your own town's most recent reappraisal date and billing schedule with its assessing office before you assume your neighbor's timeline applies to you.
Yes. New Hampshire has no statute requiring towns to mail a separate notice of assessed value the way many other states do. RSA 76:1-a defines "notice of tax" as the mailing of your actual tax bill, not a standalone valuation notice, and under RSA 76:15-a that is typically the December bill for towns on semiannual billing. The first time most homeowners see a new number is on that fall bill itself.
New Hampshire towns are required to fully reappraise all real estate at least once every five years under RSA 75:8-a, and in between reappraisals many hold values essentially flat. A jump often is not a mistake specific to your home, it is your town catching up to several years of market movement all at once during its scheduled revaluation year. That is exactly the year worth checking your assessed value against actual comparable sales.
Following the year the notice of tax, meaning your final tax bill for that year, was mailed. If your town's fall bill for the 2025 tax year went out in December 2025, your abatement application under RSA 76:16 is due by March 1, 2026, not March 1, 2025. That is about eleven months between the April 1 assessment date the bill is based on and the deadline to contest it.
You get to choose. If your town's selectmen deny or ignore your abatement application, RSA 76:16-a lets you appeal to the state Board of Tax and Land Appeals, while RSA 76:17 lets you petition Superior Court directly instead. Both deadlines land on the same date, September 1 following your notice of tax, so decide early which forum fits your case rather than defaulting to one out of habit.
It comes back through your escrow account, not directly from the town in most cases. Once your town corrects the roll and your servicer's next analysis picks up the lower amount, any resulting surplus of $50 or more must be refunded to you within 30 days under 12 CFR 1024.17(f)(2)(i), as long as you are current on your loan. If you do not want to wait for the next scheduled analysis, send your servicer the abatement decision and ask for an off-cycle review under Section 1024.17(f)(1)(ii).