HonestCasa logoHonestCasa
All Tax Guides
Updated 2025 Tax Year

Assumption County
Property Tax Guide

Everything you need to know about property taxes in Assumption County, LA. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
Calculate Your True CostMortgage Calculator
Quick Facts
Tax Rate
0.8% to 1.2% of assessed value (varies by taxing district location)
Exemptions
4+ Available
Section 1

How Property Tax Works

Assumption County (officially Assumption Parish), Louisiana operates under a property tax system that funds essential local services including schools, libraries, fire protection, and parish operations. Property taxes are administered by the Assumption Parish Assessor's Office and collected by the Parish Tax Collector. The effective tax rate typically ranges from approximately 0.8% to 1.2% of assessed value, though this varies significantly based on your property's location within specific taxing districts.

Property tax rates in Assumption Parish vary by location due to multiple overlapping special taxing districts, including school districts, fire districts, library districts, and drainage districts. Each district levies its own millage rate, which combines to create your total property tax bill. The parish uses an assessment ratio system where residential property is typically assessed at 10% of fair market value, while other property types may have different assessment ratios.

Section 2

What Makes Up Your Tax Bill

ComponentApproximate Rate (Mills)Description
Parish General Fund5.75Basic parish operations and services
Assumption Parish School Board25-35Varies by school district boundaries
Fire Protection Districts3-8Varies by fire district (multiple districts)
Library District2-4Parish library system funding
Drainage/Levee Districts1-3Flood protection and drainage maintenance
Road Districts2-5Local road maintenance (varies by area)

Note: These rates are estimates and vary by specific location within Assumption Parish. Actual millage rates are set annually during budget adoption, typically for the fiscal year running January 1 through December 31. Contact the Assumption Parish Assessor at (985) 369-6653 for current rates specific to your property's taxing districts.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Assumption County, property taxes are due in two installments:

Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental tax bills are issued when there are changes in property ownership, new construction, or improvements completed during the tax year. These taxes cover the difference between what was originally assessed and what should have been assessed based on the property changes. Supplemental taxes are calculated from the date of change through the end of the tax year.

For example, if you purchase a home in Assumption Parish in June that was previously assessed at a lower value due to a homestead exemption held by the previous owner, you may receive a supplemental bill for the difference in assessed value from June through December. Similarly, if you complete a major renovation or addition, the increased assessment will generate a supplemental tax bill. These bills are typically mailed approximately 6 months after the change occurs and have the same payment deadline as regular property taxes.

Example Calculation

Example 1: $300,000 Home with Homestead Exemption

  • Market Value: $300,000
  • Assessment Ratio (10%): $30,000
  • Homestead Exemption: -$7,500
  • Net Taxable Assessment: $22,500
  • Total Millage Rate: ~45 mills
  • Annual Tax: $1,012
  • Monthly (if escrowed): $84

Example 2: $600,000 Home with Homestead Exemption

  • Market Value: $600,000
  • Assessment Ratio (10%): $60,000
  • Homestead Exemption: -$7,500
  • Net Taxable Assessment: $52,500
  • Total Millage Rate: ~45 mills
  • Annual Tax: $2,362
  • Monthly (if escrowed): $197

Example 3: $1,000,000 Home with Homestead Exemption

  • Market Value: $1,000,000
  • Assessment Ratio (10%): $100,000
  • Homestead Exemption: -$7,500
  • Net Taxable Assessment: $92,500
  • Total Millage Rate: ~45 mills
  • Annual Tax: $4,162
  • Monthly (if escrowed): $347

Note: Homestead exemption requires application and is not automatic. Millage rates vary by specific taxing districts.

See How Taxes Affect Your Payment

Property taxes are just part of your total monthly cost. Get the full picture.

Calculate Now
Section 5

Escrow & Property Taxes

Most mortgage lenders in Assumption Parish require property tax escrow accounts, where you pay 1/12th of your estimated annual property tax bill with each monthly mortgage payment. Your lender collects these funds and pays your property taxes directly to the Assumption Parish Tax Collector when they become due on December 31st each year.

Lenders typically conduct an annual escrow analysis to ensure adequate funds are collected. If property taxes increase due to reassessment or millage rate changes, your monthly escrow payment may increase. You'll receive an escrow disclosure statement showing the calculation. It's important to review your annual tax bill to verify your lender paid the correct amount and that all applicable exemptions were properly applied. Contact your lender if you notice discrepancies, and consider requesting escrow account statements to monitor the balance throughout the year.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

Q: When are property taxes due in Assumption Parish? A: Property taxes are due by December 31st each year and become delinquent on January 1st of the following year if unpaid.

Q: What homestead exemption is available and how do I apply? A: Louisiana's homestead exemption provides up to $7,500 reduction in assessed value for owner-occupied primary residences. You must apply with the Assumption Parish Assessor's Office. The exemption is not automatic and requires documentation proving the property is your primary residence.

Q: Does the homestead exemption cap my assessment increases? A: Yes, Louisiana's homestead exemption includes assessment growth limitations. Once granted, your property's assessed value for tax purposes cannot increase more than 10% per year, even if market value increases more dramatically.

Q: When does the Assessor reassess properties? A: Louisiana requires parish-wide reassessments every four years. Assumption Parish typically follows this schedule, though individual properties may be reassessed when ownership changes or improvements are made.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Assumption Parish Assessor's Office, typically by September 15th of the assessment year. Contact the Assessor at (985) 369-6653 for current deadlines and required documentation.

Q: What are the penalties for late payment? A: Late penalties and interest accrue on unpaid property taxes beginning January 1st. Contact the Assumption Parish Tax Collector for current penalty rates and payment arrangements.

Q: Can I pay property taxes online? A: Contact the Assumption Parish Tax Collector's Office at (985) 369-2306 to inquire about online payment options and accepted payment methods.

Q: Why did I receive a supplemental tax bill? A: Supplemental bills are issued for ownership changes, new construction, or property improvements completed during the tax year. These cover the tax difference from the date of change through December 31st of that tax year.

Verified Sources

Backed by 10 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
Tax Doc
Parish & Municipality Tax Tabletaxes.mfn.dps.la.gov
02
Tax Doc
Louisiana Property Tax Basicshouse.louisiana.gov
03
Senate Bill 663 (Allen)boe.ca.gov
04
Assumption Parish Assessorapp.lla.state.la.us
05
Tax Doc
Unsecured Property Taxes Frequently Asked Questionsttc.lacounty.gov
06
Tax Doc
Secured Property Taxes Frequently Asked Questionsttc.lacounty.gov
07
HLS 243ES-15legis.la.gov
08
Road Home Homeowner's Programapp.lla.state.la.us
09
ACT No. 12legis.la.gov
10
County
New Homeowners - LA County Assessorassessor.lacounty.gov
All sources verified as of 2025 Tax Year

See the Full Picture of Your Home Costs

Property taxes are just one piece of homeownership. HonestCasa helps you understand your total monthly cost and explore safe ways to access your home equity.

Total Monthly Cost

Mortgage + taxes + insurance + HOA

Equity Growth

Track how your equity grows over time

Safe Equity Access

Options for projects or debt payoff

Run Your ScenarioTry Calculator

Free • No credit check • 2-minute estimate