Maine Property Tax Calculator (Assessed Value & Millage Rates)

Property tax bills in Maine run on an average effective rate of 0.91%, good for a #22 national ranking and above the national median. That's modestly below the national average of roughly 1.0%, but well below the Northeast regional average of about 1.61%.

Like its neighbors elsewhere in the Northeast, Maine relies on property tax as the primary funding mechanism for public schools, emergency services, and county infrastructure, with local taxing authorities setting the actual millage each year.

Maine counties handle the mechanics of periodic reappraisal and millage-setting locally, so the statewide average above is a useful benchmark but actual bills still hinge on the specific county, school district, and any exemptions or appeals the owner has filed in a given year.

Maine equalizes rather than classifies. Towns assess at whatever percentage of market value they choose, and the state certifies a ratio for each town that scales the homestead exemption to match. The posted mill rate in one Maine town is therefore not comparable to another until you know both certified ratios.

None of that detail is asked for here. This calculator works one level up, applying Maine's average effective property tax rate of 0.91% to the value you enter. That rate is the ratio of property taxes actually paid to home value across the state, so the assessment ratios, caps, and exemptions described above are already baked into it.

Steps 1 and 2 describe how a Maine town builds a bill. The calculator applies no certified ratio and knows no town. Steps 3 to 5 are the computation.

1. Start from the town's assessed value. The assessment reflects the town's own valuation practice, not a statewide standard.
2. Take off the homestead exemption. The $25,000 exemption is multiplied by the town's certified ratio before it is subtracted.
3. Multiply by the effective rate. At 0.91%, a $400,000 home in Maine comes to $3,640 a year before any exemption you enter above.
4. Divide by twelve for escrow. That same home works out to $303.33 a month set aside in a mortgage escrow account.
5. Compare it against your own bill. Maine's veteran and blind exemptions are scaled by the same certified ratio. Your county's number is the one that governs; this figure tells you whether it is roughly where a Maine home of that value ought to land.

Using this calculator's baseline inputs: a $400,000 home in Maine, taxed at the state's 0.91% average effective rate (rank #22 of 50 states).

1. Start with the assessed value. The home is assessed at its full $400,000.00 market value, with no homestead exemption applied in this baseline scenario.
2. Apply the effective rate. $400,000.00 × 0.91% = $3,640.00 in annual property tax, Maine's statewide average effective rate.
3. Convert to a monthly escrow. Lenders typically collect property tax in twelve equal installments alongside principal and interest: $3,640.00 ÷ 12 = $303.33 per month.
4. Project a five-year hold. At a flat rate, five years of ownership totals $3,640.00 × 5 = $18,200.00, before any reassessment, exemption change, or millage increase.

At 0.91%, Maine lands roughly in the middle nationally, ranking #22 of 50 states. That is a moderate but still material carrying cost for homeowners.

Why a Maine bill is hard to compare, and what this page does instead. Maine towns assess at whatever percentage of market value they choose, and the state certifies a ratio for each town that scales the homestead exemption to match. A posted mill rate in one town is therefore not comparable to a mill rate in the next until you know both certified ratios. This calculator sidesteps that entirely: it holds one statewide figure, 0.91%, which is the ratio of taxes actually paid to home value, and multiplies. No town, no certified ratio and no mill rate exists anywhere in this code path.

The sweep. The twelve rows run value from $66,666.67 to $800,000.00 and annual tax from $606.67 to $7,280.00, with $3,640.00 at the $400,000 row and $303.33 a month beside it. Every row divides to 0.91%, so there is no threshold to walk and no bend in the chart.

Marginal cost of the next unit. Each additional $10,000 of value costs $91.00 a year, each $100,000 costs $910.00, and moving the entry from $400,000 to $410,000 takes the bill from $3,640.00 to $3,731.00. Because Maine's coastal and inland markets differ by far more than that per year, the rate is rarely what decides a Maine purchase; the valuation is.

The reverse question. A $250 monthly escrow line supports a Maine home worth $329,670, which the calculator returns as $3,000.00 a year and $250.00 a month. That sits between Iowa's $232,558 and Indiana's $405,405 on the same budget, which is where a 0.91% rate and a #22 national ranking should put it.

The exemption, and the row that does not move with it. Maine's $25,000 homestead exemption is multiplied by the town's certified ratio before a town subtracts it, and that scaling is not modelled here either. Enter the full $25,000 against the $400,000 default and the headline drops to $3,412.50, a saving of $227.50. The table's $400,000 row stays at $3,640.00, because the schedule is built from the value you typed rather than from value net of exemption, and the effective-rate output stays at 0.91% for the same reason: it reports the state average, not your ratio.

• Specific hyper-local county and municipal millage district variations within Maine.
• Special assessment or tax increment financing district charges. Some Maine municipalities levy additional assessments on benefiting parcels for road, sewer, or water improvements on top of the base municipal and school millage.
• Commercial vs residential assessment classification differentials.
• Property tax appeal reductions or localized board of equalization adjustments.

• Confusing Market Fair Value with Assessed Basis: Some jurisdictions assess property at fractional ratios rather than 100% of market value.
• Failing to File Homestead Paperwork: Homestead exemptions are rarely automatic; homeowners must file timely paperwork with the county appraisal district.
• Underestimating Post-Sale Supplemental Assessments: Purchasing a newly constructed or reassessed property often triggers catch-up supplemental tax bills.
• Ignoring Property Tax Appeal Windows: Missing the annual 30-to-60 day statutory protest window forfeits the right to challenge over-assessed property values for that tax year.

• U.S. Census Bureau: American Community Survey (ACS) Real Estate Assessment Benchmark Data. census.gov/programs-surveys/acs
• Maine Revenue Services: Property Tax Assessment Guidance. maine.gov/revenue