Hillsborough County Tax Estimator

How property tax works in Hillsborough County

Your bill is the assessed value of your home multiplied by the combined rate of every authority that taxes it — the county, the school district, the city or township, and often a fire or library district. Those rates are set separately and added together, which is why two houses of identical value on opposite sides of a district line can owe different amounts.

Across Hillsborough County, the median home is worth $385,500 and the median property tax bill is $6,791. Dividing one by the other gives the effective rate of 1.762% used above. That is the honest way to estimate a bill without knowing which districts a specific address falls into.

Income tax in New Hampshire, while you are here

New Hampshire does not tax wage income at all, which is part of why property tax carries more of the load here than it does in most states. Work out your New Hampshire income tax.

Hillsborough County in the national picture

Hillsborough County is in the most expensive tenth of the country. Its effective rate of 1.76% clears 1.57%, the 90th-percentile line across 3,132 counties. Over a ten-year hold on a $400,000 home, the gap against a median-rate county comes to roughly $36,980 — which is the sort of figure that belongs in the buying decision, not the surprise column.

For scale, the range across the whole country runs from about 0.08% at the bottom to 3.64% at the top. That is a spread of more than twenty to one on the same house, and it is decided almost entirely by where the line on the map falls rather than by anything about the property itself.

What 1.76% costs at each price point in Hillsborough County

The rate is a percentage, so the bill scales straight with the value the assessor puts on the property: $200,000 → $3,523 a year ($294 a month); $350,000 → $6,166 a year ($514 a month); $500,000 → $8,808 a year ($734 a month); $750,000 → $13,212 a year ($1,101 a month); $1,000,000 → $17,616 a year ($1,468 a month).

The median home in Hillsborough County is assessed around $385,500, which is why the typical bill here lands near $6,791. If you are looking above that price, read the row that matches your budget rather than the median — the median describes the borough, not your purchase.

One caveat that catches people out: these figures use assessed value, and in many states that is not the same as the price you paid. Some states assess at a fixed fraction of market value, and some cap how fast an assessment can rise for an existing owner. Both make the published rate look higher or lower than what a specific household actually pays.

What property tax takes out of a Hillsborough County income

Median household income in Hillsborough County is $100,436 and the median property tax bill is $6,791. That is 6.8% of gross household income going to property tax alone — before any income tax, before FICA, and before the mortgage the tax sits on top of.

Above about 4%, property tax stops being a line item and starts being a constraint. In Hillsborough County it is 6.8%, which means a household here is carrying roughly $566 a month in tax on the home before principal, interest or insurance. It is the single strongest argument for checking the assessment rather than assuming it is right.

This is also the number that rent quietly reflects. A landlord in Hillsborough County pays the same $6,791 on a comparable property and prices it into the lease, so the tax reaches renters too — it just arrives without a bill attached.

Why New Hampshire counties charge such different rates

Property tax is set locally, so New Hampshire does not have one rate — it has 10. They run from 1.06% in Carroll County to 2.38% in Sullivan County, with Hillsborough County at 1.76%, 4th cheapest of 10.

That is a comparatively tight range for a US state — 2.3 to one between the extremes — which usually means New Hampshire funds a large share of school costs at state level rather than leaving districts to raise it locally. Where the state carries more, local rates converge.

The practical consequence is that a rate you were quoted for New Hampshire as a whole is close to meaningless. The number that applies to you is the one for your borough, and often for your district within it.

Property tax and income tax in New Hampshire, together

New Hampshire does not tax wage income, so the money that funds schools, roads and county services has to come from somewhere else — and property tax is where most of it comes from. That is the trade, and it is worth seeing both halves before deciding a state is cheap.

Hillsborough County shows the trade clearly: no income tax at all, and a property rate of 1.76% that sits in the upper reaches nationally. A high earner usually comes out ahead on that swap; someone with a large house and a modest income often does not.

What the Hillsborough County figure is, and what it is not

The 1.76% on this page is an effective rate: the Census Bureau's median property tax paid in Hillsborough County ($6,791) divided by its median home value ($385,500), both from the American Community Survey five-year estimates. It is a real, citable measure of what owners here actually pay.

It is not a millage rate, and it is not the number on your tax bill. Your bill is the sum of every levy that reaches your parcel — borough, school district, city or township, and often a fire, library or water district — applied to your assessed value after any exemption you qualify for. Two houses of the same value on opposite sides of a district line in Hillsborough County can owe different amounts, and both are correct.

Use this figure to compare Hillsborough County against other places and to sanity-check an escrow estimate. Use the assessor's roll to find out what you owe.

Hillsborough County at a glance

Hillsborough County has a population of about 424,732, 176,753 housing units, and a median household income of $100,436.

At that size there are typically a handful of taxing districts inside the borough, so the rate on this page is an average across them rather than the figure for any one address.

The New Hampshire rules that change your Hillsborough County bill

RSA 75:1 requires New Hampshire municipalities to appraise at full and true market value, but assessments drift between updates and the Department publishes an annual equalization ratio for each town measuring how far. It reviews each municipality's assessing records at least once every five years for compliance. As in Maine and Vermont, a New Hampshire assessed value means little without its town's ratio.

New Hampshire devolves almost all of it. Under RSA 72:39-a each town sets its own elderly exemption amount, in three age bands — 65 to 75, 75 to 80, and 80 and over — with income limits the town chooses but that cannot fall below $13,400 single or $20,400 married. You need three consecutive years of New Hampshire residency. Separately, the state-run Low and Moderate Income Homeowners relief cuts the State Education Property Tax for filers with AGI at or below $37,000 single or $47,000 married, claimed on Form DP-8.

These are New Hampshire rules and they apply in every borough in the state, Hillsborough County included. What varies locally is the rate, not the relief — so if you qualify for the relief and have not claimed it, the Hillsborough County assessor is where that gets fixed.

The ten-year figure, which is the one that decides a purchase

A single year's property tax is a number people accept without much thought. The decade is the number that changes decisions, because unlike a mortgage it never amortises away and unlike income tax it does not fall when your income does.

On Hillsborough County's median home value of $385,500, held ten years with assessed value rising 4% a year, Hillsborough County collects about $81,533. The cheapest borough in the state collects $48,885 over the same period and the dearest $109,997 — a spread of $61,113 on identical property, decided entirely by location.

The same house at the national median rate of 0.84% would run $38,744 over ten years, so Hillsborough County costs about $42,789 more across the decade than a typical American borough would.

Set that against the mortgage to see the weight of it. On a $385,500 purchase the ten-year property tax bill in Hillsborough County is roughly 26% of the amount financed at 80% loan-to-value — before insurance, before maintenance, and before any millage increase. It is the largest recurring cost of ownership after interest, and the only one that a district can raise without asking you.

A rate in the national top decile changes what ownership is for. Over a long hold the cumulative tax approaches a meaningful fraction of the purchase price, which shifts the arithmetic of buying versus renting and makes the exemptions and caps worth pursuing far more aggressively than elsewhere — an unclaimed homestead is expensive here in a way it simply is not in a low-rate jurisdiction.

Appealing a Hillsborough County assessment: what it is worth

You cannot appeal the tax rate — that is set by budget votes you have no standing to challenge individually. What you can appeal is the assessor's opinion of your property's value, and that is a factual claim you can be right or wrong about.

The arithmetic decides whether it is worth your afternoon. On the median home in Hillsborough County, $385,500, the bill runs about $6,791 a year. A 10% reduction in assessed value is worth roughly $679 a year, and because the corrected value carries forward it is nearer $3,396 across five years. Under $60 a year, the paperwork rarely pays; over $400, it usually does.

At that size the case for challenging is straightforward and the evidence needed is modest. Three to five recent arm's-length sales of genuinely similar properties — same neighbourhood, similar size, age and condition — near your valuation date. Boards here see enough volume that a documented comparable-sales packet is decided on its merits rather than on advocacy, and paid representation is available on contingency where the sums justify it.

Also check the record itself before arguing valuation, because errors are commoner than contested opinions: square footage that includes an unfinished basement, a bathroom that does not exist, a garage counted twice, land area from a survey predating a lot split. A factual correction is usually granted without a hearing.

Deadlines are set locally here and are short — often thirty to forty-five days from the date the assessment notice was mailed, not from when you read it. Check the notice itself for the date, because missing the window generally forfeits the year regardless of how strong the case was.

How the bill is paid, and what happens if it is not

Most owners with a mortgage never pay this directly. The servicer collects roughly $566 a month alongside principal and interest on the median Hillsborough County bill, holds it in escrow, and pays the borough when it falls due. The consequence is that a rise reaches you as a change in your monthly payment months after the fact, with no obvious connection to the assessment notice that caused it.

Read the annual escrow analysis when it arrives. It shows the bill actually paid, and it is the cheapest way to catch an assessment you would have appealed had you noticed — by the time the payment changes, the appeal window for that year has usually closed.

The weight here is unusual enough to plan around: the median bill is 6.76% of median household income, so the monthly escrow line is a substantial fixed commitment rather than a rounding item. Lenders qualify borrowers on the full payment including it, which is why a high-tax jurisdiction reduces the price a given income can support — the tax competes with the mortgage for the same debt-to-income headroom.

Unpaid property tax is also secured against the house itself, which is what separates it from every other tax. States permit a tax lien, and eventually a tax sale, at the end of a statutory redemption period. It is slow and heavily noticed, so it is nearly always avoidable — but the mechanism means an unpaid property tax bill can never simply be written off the way an unpaid income tax debt sometimes is.

The New Hampshire counties either side of Hillsborough County

The New Hampshire counties immediately cheaper than Hillsborough County: Rockingham County at 1.63%, Belknap County at 1.44%, Carroll County at 1.06%. On a $400,000 home the move from Hillsborough County to Carroll County would save about $2,822 a year.

Immediately more expensive: Grafton County at 1.88%, Strafford County at 1.98%, Merrimack County at 2.00%. If you are weighing Hillsborough County against Grafton County, the rate gap on a $400,000 home is about $490 a year — worth knowing, but rarely the largest difference between two places.

Comparisons like these are the reason to use an effective rate rather than a millage. Millage rates are not comparable across county lines because assessment practices differ; tax paid over value paid is.

What actually sets your Hillsborough County bill

Three numbers decide your bill, and the rate is only one of them. The first is assessed value, and New Hampshire does not reach it by a single fixed fraction. RSA 75:1 requires New Hampshire municipalities to appraise at full and true market value, but assessments drift between updates and the Department publishes an annual equalization ratio for each town measuring how far. It reviews each municipality's assessing records at least once every five years for compliance. As in Maine and Vermont, a New Hampshire assessed value means little without its town's ratio.

The second is how fast that value is allowed to move. We have not loaded a statewide cap for New Hampshire, so assume your assessment can follow the market unless your assessor tells you otherwise.

The third is the combined rate of every authority that reaches your parcel — the borough, the school district, the city or township, often a fire or library district. They are set separately and added, which is why two houses of identical value on opposite sides of a line in Hillsborough County owe different amounts and both figures are correct.

Buying in Hillsborough County? Read this first

Property tax is the part of the monthly cost buyers most often underestimate, because it does not surface until the lender builds the escrow. On a $400,000 home in Hillsborough County it adds roughly $587 a month on top of principal, interest and insurance — $7,046 a year.

One rule to check before you rely on the seller's number: whether New Hampshire revalues the property when it changes hands. Where it does, the seller's bill can understate yours badly; where it does not, you inherit their position. We have not loaded that rule for New Hampshire, so ask the Hillsborough County assessor directly rather than assuming.

Then ask what relief you qualify for in your first year. Deadlines are short and often fall early in the year. Relief that is not claimed is not given.

If your Hillsborough County assessment looks wrong

You can contest the assessed value. You cannot contest the rate — that is set by elected bodies and is not open to appeal. So the question to answer before filing is narrow: would this property actually sell for what the assessor says it is worth?

Gather comparable sales close to the assessment date rather than to today. An assessor is defending a valuation as of a particular day, and recent sales that postdate it carry little weight.

Deadlines are short and usually run from the date the assessment notice is mailed rather than from when you opened it. The Hillsborough County assessor's office is where the clock is published, and missing it costs the whole year — there is no late appeal in most jurisdictions.

Hillsborough County property tax questions

How much is property tax in Hillsborough County?

The effective rate in Hillsborough County is 1.76%, from a median tax bill of $6,791 on a median home value of $385,500. On a $400,000 home that is about $7,046 a year, or $587 a month once it is in escrow.

Is property tax high in Hillsborough County?

Yes — it is in the most expensive tenth of the country. Hillsborough County charges 1.76% against a national median of 0.84%, ranking 2950 of 3,132 counties from the cheapest.

Which New Hampshire county has the lowest property tax?

Carroll County at 1.06%, with Sullivan County the most expensive at 2.38%. Hillsborough County sits at 1.76%, 4th cheapest of the 10 New Hampshire counties with published data.

Will my Hillsborough County tax bill change when I buy?

That depends on whether New Hampshire revalues a property when it changes hands, and we have not loaded that rule for New Hampshire. It matters: in states that reassess on sale, the seller's bill can badly understate what you will pay. Ask the Hillsborough County assessor before you rely on the current figure.

Do seniors pay property tax in Hillsborough County?

New Hampshire devolves almost all of it. Under RSA 72:39-a each town sets its own elderly exemption amount, in three age bands — 65 to 75, 75 to 80, and 80 and over — with income limits the town chooses but that cannot fall below $13,400 single or $20,400 married. You need three consecutive years of New Hampshire residency. Separately, the state-run Low and Moderate Income Homeowners relief cuts the State Education Property Tax for filers with AGI at or below $37,000 single or $47,000 married, claimed on Form DP-8. That is a New Hampshire rule and it reaches Hillsborough County like every other county in the state; the Hillsborough County assessor or treasurer handles the application.

Is my Hillsborough County home taxed on its full market value?

Not straightforwardly. RSA 75:1 requires New Hampshire municipalities to appraise at full and true market value, but assessments drift between updates and the Department publishes an annual equalization ratio for each town measuring how far. It reviews each municipality's assessing records at least once every five years for compliance. As in Maine and Vermont, a New Hampshire assessed value means little without its town's ratio.

Can I appeal my Hillsborough County assessment?

You can contest the assessed value, but not the rate — the rate is set by elected bodies and is not open to appeal. Deadlines are short and usually run from the date the assessment notice was mailed rather than from when you opened it. The Hillsborough County assessor's office publishes the current window, and in most jurisdictions there is no late appeal.

Does New Hampshire have an income tax as well?

No. New Hampshire does not tax wage income at all, which is part of why property tax carries more of the local funding burden here — the money has to come from somewhere.

Do I need a parcel number to use this calculator?

No, and that is deliberate. The Hillsborough County assessor's own estimator generally asks for one, which is fine if you already own the property and useless if you are deciding whether to buy it. This works from the home value instead. It is an estimate built on the county's effective rate, which averages across every district inside Hillsborough County, so your exact bill depends on your district combination and on any exemption you qualify for. For the binding figure, the Hillsborough County assessor or treasurer is the authority.