Property tax in Plymouth, CT applies to real estate, motor vehicles, and business personal property, and it funds schools, public safety, roads, and other town services. For the fiscal year running July 2025 through June 2026, the mill rate is 39.57, meaning you pay $39.57 in tax for every $1,000 of assessed value. The proposed rate for FY 2026–2027 drops to 31.71, largely because a recent revaluation pushed assessed values higher, so a lower rate raises similar revenue.1Town of Plymouth. Mayor’s Draft Budget for FY 2026-2027 Bills are due in two installments, July 1 and January 1, with a one-month grace period on each.2Justia. Connecticut Code 12-142 – Installments, Due Date
How Your Bill Is Calculated
Every October 1, Plymouth’s Assessor compiles the Grand List, a snapshot of taxable property in town and its value.3Connecticut Office of Policy and Management. Total Grand List by Town Connecticut law requires every municipality to assess property at 70% of fair market value.4Justia. Connecticut Code 12-62a – Uniform Assessment Date and Rate So a home with a market value of $300,000 has an assessed value of $210,000. That 70% figure is statewide and not set by Plymouth.
The Board of Finance sets the mill rate during the annual budget process. One mill equals $1 of tax per $1,000 of assessed value.5Connecticut Office of Policy and Management. Mill Rates Multiply assessed value by the mill rate, divide by 1,000, and you have the annual bill. On that $300,000 home at the current 39.57 rate: $210,000 × 39.57 ÷ 1,000 = $8,309.70 for the year.
What Gets Taxed
Real estate covers homes, garages, commercial buildings, undeveloped land, agricultural parcels, and even partially completed construction.6Justia. Connecticut Code 12-64 – Real Estate Liable to Taxation You owe tax whether you live in the property, rent it out, or leave it vacant. Motor vehicles garaged or normally kept in Plymouth are taxable too, even unregistered ones sitting in a driveway, and are valued as of the October 1 assessment date.7Justia. Connecticut Code 12-71 – Personal Property Subject to Tax Businesses report machinery, equipment, furniture, computers, and similar tangible assets each year (more on that below).
Why Revaluations Move the Rate
Connecticut requires every town to revalue property at least once every five years. When assessed values rise across the board, the mill rate typically drops so the town doesn’t reap a windfall. Plymouth’s proposed shift from 39.57 to 31.71 for FY 2026–2027 reflects that adjustment.1Town of Plymouth. Mayor’s Draft Budget for FY 2026-2027 Your individual bill can still rise, though, if your property gained value faster than the town average.
Due Dates, Grace Period, and Late Interest
The first installment is due July 1, the second January 1.2Justia. Connecticut Code 12-142 – Installments, Due Date The one-month grace period pushes the practical last-day-to-pay to August 1 and February 1.
Miss those and interest runs at 18% per year (1.5% per month), calculated back to the original due date, not the end of the grace period. A $2 minimum interest charge applies per installment. The 18% rate is set by state law, so the Tax Collector has no authority to reduce or negotiate it. The one statutory exception is for taxpayers who have received compensation as crime victims under Connecticut law, in which case the town must waive all or part of the interest.8Justia. Connecticut Code 12-146 – Delinquent Tax or Installment, Interest, Waiver of Interest
If you mail your payment, the USPS postmark controls timeliness. A check postmarked July 31 for the first installment is on time even if it arrives in August. A metered stamp from your office doesn’t count.
How to Pay
The Tax Collector’s office is at 80 Main Street, Terryville, CT 06786, open Monday through Thursday from 8 a.m. to 5 p.m. and Friday from 8:30 a.m. to noon.9Town of Plymouth. Tax Collector You have three options:
- By mail. Send a check to the Tax Collector at the address above with your bill stub or account number. Multiple tax bills can go on one check, but sewer payments must be a separate check.9Town of Plymouth. Tax Collector
- Online. The town’s portal at mytaxbill.org lets you search and pay electronically. A third-party fee applies, typically a small flat fee for electronic checks and a percentage for credit cards. Save the digital receipt.10Town of Plymouth. Town of Plymouth Tax Bill Search
- In person. Cash, check, or certified funds at Town Hall during office hours, with immediate confirmation.
If Your Lender Pays Through Escrow
When a mortgage servicer collects taxes through escrow, federal rules require it to pay the bill before any penalty deadline.11Consumer Financial Protection Bureau. 1024.17 Escrow Accounts Check each year that the payment actually posted, especially after a revaluation when the bill amount changes. A delinquent tax creates a lien on the property no matter whose mistake caused the miss.
Exemptions and Credits That Lower the Bill
Most Plymouth exemptions require an application by a specific deadline. They don’t apply automatically.
Veterans
Veterans who served during qualifying war periods receive a base exemption of $3,000 off assessed value. File your DD-214 with the Town Clerk before October 1.12Town of Plymouth. Assessor Connecticut’s additional veteran exemption can double the base to $6,000, and disabled veterans receive higher amounts tied to their disability rating. A 100% permanent and total VA disability rating may exempt the entire primary residence.
Elderly and Disabled Homeowners
Connecticut’s circuit breaker program gives a direct credit to homeowners who are 65 or older or totally disabled and whose income falls below program limits. The maximum credit is $1,250 for married couples and $1,000 for single filers, and it scales down as income rises.13Connecticut Office of Policy and Management. Homeowners Elderly/Disabled Circuit Breaker Tax Relief Program Apply at the Assessor’s office between February 1 and May 15. Waiting for the summer bill means missing the window.
Blind and Disabled Residents
Plymouth allows a $3,000 assessment exemption for qualifying blind homeowners and a $1,000 exemption for homeowners with permanent total disabilities. Apply with the Assessor by October 1.12Town of Plymouth. Assessor Towns can authorize additional local amounts on top of these state minimums, so ask the Assessor whether Plymouth has done so.
Appealing Your Assessment
If you believe the Assessor overvalued your property, the first stop is Plymouth’s Board of Assessment Appeals. File in writing or by email by February 20 following the October 1 assessment date.14Justia. Connecticut Code 12-111 – Appeals to Board of Assessment Appeals Your filing needs a description of the property, the reason for the appeal, and your own estimate of value.
The board schedules a hearing and gives at least seven days’ notice. After hearing your case, the board can lower, raise, or confirm the assessment.14Justia. Connecticut Code 12-111 – Appeals to Board of Assessment Appeals Because it can also raise the number, don’t file unless you have real evidence: a recent appraisal, comparable sales, or documentation of property defects. Arguments that your taxes feel high or that a neighbor pays less don’t move the board. It looks at whether the market value assigned to your specific property is accurate.
If the board rules against you, Connecticut law allows a further appeal to Superior Court. Commercial, industrial, and apartment properties assessed above $1 million may go directly to court.
Business Personal Property Declarations
If you own a business in Plymouth, you must file a declaration of taxable personal property (equipment, furniture, fixtures, tools, and similar items) with the Assessor by November 1 each year.12Town of Plymouth. Assessor Filing late or not at all triggers a 25% penalty added to your assessment, which flows straight into a higher bill.15Connecticut General Assembly. Connecticut General Statutes Chapter 203 – Property Tax Assessment Writing “same as last year” counts as incomplete and draws the same penalty.
Need more time? Request an extension from the Assessor before the deadline. Filing after an extension expires still triggers the 25% penalty. The Assessor can also independently discover unreported property using the best information available, so skipping the declaration risks a higher valuation than you would have reported yourself.
Federal Deduction for Plymouth Property Taxes
Plymouth property taxes are deductible on your federal return if you itemize on Schedule A. The deduction covers real property taxes levied for the general public welfare at a uniform rate, which Plymouth’s tax qualifies as.16Internal Revenue Service. Topic No. 503, Deductible Taxes Fees for specific services like sewer or trash collection are not deductible.
For 2026, the combined federal deduction for state and local taxes is capped at $40,000 for most filers, or $20,000 for married filing separately. The cap phases down for filers with modified adjusted gross income above $500,000 and increases 1% a year through 2029.16Internal Revenue Service. Topic No. 503, Deductible Taxes For most Plymouth homeowners the cap is high enough that all of the property tax is deductible, but if you also pay significant Connecticut income tax, the combined total can push against the limit.