New Hampshire property taxes
New Hampshire property tax calculator
Choose a town and enter the town’s assessed value for the property — not the purchase price. New Hampshire property tax is charged on assessed value, so this calculation is exact at the town’s 2025 rate.
Where to find the assessed value: it is printed on your property tax bill, and every New Hampshire town publishes its assessment records through the town assessing office — most have an online property lookup. Do not use the purchase price. Towns assess below market value between revaluations, so a purchase price overstates the bill.
Hopkinton’s 2025 rate is $23.35 per $1,000 of assessed value. Enter the assessed value for the annual bill.
How this is calculated
New Hampshire tax rates are quoted per $1,000 of assessed value, so the calculation is assessed value ÷ 1,000 × rate. Because you enter the town’s own assessed value, there is no estimation involved — this is the same arithmetic the town does.
A purchase price is not an assessed value. Most towns assess below market value between revaluations, and a town does not automatically reassess to a sale price after a sale, so a first bill usually reflects the prior assessment. Converting a market price to a bill requires the town’s equalization ratio, which we do not publish here.
Full rate detail by town, including each rate’s municipal, county, state education and local education components, is on the New Hampshire property tax rate guide.