Mercer County, New Jersey, is known for its higher-than-average property taxes, with an effective rate of approximately 2.00%. Homeowners with a median property value of $436,500 often face significant annual tax bills due to local schools, municipalities, and county services. Our Mercer County tax calculator helps residents quickly estimate their property taxes, accounting for municipal variations in cities like Trenton, Princeton, and Hamilton, providing clarity for better financial planning.
Mercer County Tax Estimator (2024 Rates)
Estimator uses 2024 Mercer County effective tax rates (rate per $100 of assessed value).
Mercer County Property Tax Due Dates 2026
Property taxes in Mercer County, New Jersey, are billed annually and payable in four quarterly installments. Each payment has a 10-day grace period, after which interest and penalties may apply if unpaid.
| Quarter | Due Date | Grace Period End |
|---|---|---|
| 1st | February 1 | February 10 |
| 2nd | May 1 | May 10 |
| 3rd | August 1 | August 10 |
| 4th | November 1 | November 10 |
Penalties for Late Payment for 2026
Mercer County enforces penalties on overdue property taxes. Interest accrues from the first of the month after the grace period: 8% per year on the first $1,500 and 18% on amounts above $1,500. Delinquencies exceeding $10,000 incur a 6% year-end penalty if unpaid by December 31. Property owners should pay on time to avoid additional charges and potential tax lien sales.
Mercer County Tax Calculator 2026
Our Mercer County tax calculator helps residents estimate property taxes quickly. Simply enter your property’s market value, select your municipality, property type, and applicable credits to see your assessed value and estimated taxes.
How to Use the Mercer County Tax Calculator
Using the calculator is straightforward. Enter your home or commercial property’s market value, choose the municipality (e.g., Trenton, Princeton, Hamilton), and select the property type. For example, a $436,500 residential property in Princeton with no credits applied will show an assessed value, which forms the basis for calculating the tax due.
Understanding Assessed Value
The assessed value is the portion of your property’s market value used to calculate taxes. In Mercer County, this is usually a percentage of the appraised market value determined by the local assessor. For instance, a $436,500 home might have an assessed value of $436,500 (100%) depending on municipal rules. This value is then multiplied by the effective tax rate to estimate taxes owed.
Applying Credits in Mercer County
Your tax bill can be reduced with eligible credits. The calculator allows you to apply the Owner-Occupancy Credit (2%) or Homestead Credit if applicable. For example, a homeowner in Hamilton Township applying the 2% owner-occupancy credit will see a lower tax estimate, reflecting the county’s specific deductions for residents.
Mercer County 2025 Property Tax Rates (payable in 2026)
Mercer County residents face varying property tax rates depending on their municipality. This breakdown shows the county, school, municipal, and library taxes, along with total and effective tax rates for each township and borough.
Mercer County Municipal and School Tax Rates
The first table highlights county, municipal, and school taxes for key municipalities, giving homeowners an overview of their base property tax obligations for 2025.
| Taxing District | County Tax | Municipal Purpose Tax | Municipal Open Space Tax | School Tax |
|---|---|---|---|---|
| E. Windsor Twp. | 0.800 | 0.465 | — | 2.241 |
| Ewing Twp. | 0.777 | 1.057 | — | 2.100 |
| Hamilton Twp. | 0.785 | 1.317 | 0.050 | 1.510 |
| Hightstown Boro. | 0.871 | 1.722 | — | 2.384 |
| Hopewell Boro. | 0.710 | 0.774 | 0.010 | 1.917 |
Mercer County Open Space and Library Tax Rates
This table focuses on Open Space and Library taxes across all Mercer County municipalities, showing additional levies homeowners must account for when estimating annual property taxes.
| Taxing District | County Library Tax | Open Space Tax | Municipal Library Tax |
|---|---|---|---|
| Hopewell Twp. | 0.064 | 0.040 | — |
| Lawrence Twp. | 0.064 | 0.040 | — |
| Pennington Boro. | — | 0.041 | 0.046 |
| Trenton City | — | 0.051 | — |
| Robbinsville Twp. | 0.074 | 0.046 | — |
| W. Windsor Twp. | 0.073 | 0.046 | — |
| Princeton | 0.779 | 0.045 | 0.050 |
Mercer County Total and Effective Tax Rates
The final table shows total tax rates, effective tax rates, and ratio to true value, giving homeowners a complete picture of the 2025 property tax burden in each district.
| Taxing District | Total Tax Rate | Tax Rate Effective | Ratio to True Value |
|---|---|---|---|
| E. Windsor Twp. | 3.627 | 2.341 | 64.69% |
| Ewing Twp. | 4.051 | 2.690 | 66.95% |
| Hamilton Twp. | 3.708 | 2.434 | 65.78% |
| Hightstown Boro. | 5.109 | 3.028 | 59.33% |
| Hopewell Boro. | 3.498 | 2.545 | 72.96% |
| Hopewell Twp. | 3.129 | 2.343 | 75.02% |
| Lawrence Twp. | 3.165 | 2.376 | 75.34% |
| Pennington Boro. | 3.308 | 2.420 | 73.20% |
| Trenton City | 5.890 | 3.468 | 60.13% |
| Robbinsville Twp. | 3.488 | 2.345 | 67.26% |
| W. Windsor Twp. | 3.162 | 2.080 | 65.83% |
| Princeton | 2.733 | 1.814 | 66.50% |
Mercer County 2025 Property Tax Rate PDF
This PDF provides a complete breakdown of Mercer County’s 2025 property tax rates, including county, school, municipal, library, and open space taxes. It helps residents quickly understand total and effective tax rates across all townships and boroughs for accurate planning and reference.
Conclusion
Mercer County property taxes in 2026 remain a crucial factor for homeowners and investors. Using our property tax calculator, residents can easily estimate their annual tax liability, plan budgets, and make informed financial decisions. By understanding effective tax rates across different municipalities, users can optimize their property investments and stay compliant with local tax regulations, ensuring transparency and convenience in property management.
FAQs
What is the current property tax rate in Mercer County, NJ?
Mercer County's property tax rate varies by municipality. Using the 2026 calculator, you can determine your exact rate based on your property location and assessed value.
How does the Mercer County Property Tax Calculator work?
The calculator estimates annual property taxes by multiplying your property's assessed value by the local effective tax rate, giving an accurate projection for budgeting purposes.
Can I use the calculator for multiple Mercer County towns?
Yes, the tool includes all municipalities within Mercer County, allowing comparisons of tax liabilities across different towns.
Is the calculator updated for 2026 tax rates?
Yes, our Mercer County property tax calculator reflects the latest 2026 rates and trends to provide accurate estimations for homeowners.
Can the calculator help with tax planning for new home buyers?
Absolutely. It helps new buyers understand potential property tax costs, enabling better financial planning before purchasing a home in Mercer County.