Property taxes — how they work how they change and how to appeal

This article is for educational purposes only and is not a substitute for professional advice. Local codes, regulations, and best practices vary by region.

Property taxes arrive every year without fail. You might pay them directly to your municipality, or they might be buried in your mortgage payment if your lender handles your escrow account. Either way, it’s money out of your account annually. Property taxes are often one of the largest line items in your housing budget, yet most homeowners have no idea how they’re actually calculated or whether they have any say in the amount. The truth is that you do have options, and in some cases, knowing them can save you hundreds or thousands of dollars.

How Your Tax Bill Gets Calculated

Property taxes are based on a formula: your home’s assessed value multiplied by your municipality’s tax rate. That sounds simple, but each component hides complexity.

Your local assessor determines your home’s assessed value. This is not the price your home would sell for on the market today. It’s a value set by the county or municipality for tax purposes. In some jurisdictions, the assessed value is literally your purchase price. In others, it’s a percentage of market value, typically 50 to 100 percent depending on state law. When you buy a home, the assessor often uses your purchase price as the starting point. The idea is that a recent arm’s length sale represents fair market value. But markets move, improvements are made, and sometimes assessments don’t keep pace or move faster than reality.

The tax rate is determined by your municipality or county and is expressed as a millage rate. A millage rate is the amount of tax per thousand dollars of assessed value. In many places, you’ll see it as something like 25 mills, which means $25 per $1,000 of assessed value. If your home is assessed at $300,000 and your millage rate is 25 mills, your annual property tax is $7,500. Different properties in different districts pay different rates based on what local government services they’re funding. Schools are often the largest portion of property tax bills because school funding in most states comes largely from property taxes.

The regional variation in property taxes is enormous. A $400,000 home in one state might have annual property taxes of $800. The same home in another state might have annual taxes of $10,000. This variance isn’t about the home; it’s about where it sits. A home near New York City has vastly higher tax rates than the same home in rural Montana. This is why property taxes matter enormously to where you choose to buy. Over a 30-year mortgage, the cumulative difference is staggering.

How Assessments Change

When you purchase your home, the assessor records your purchase price as the new assessed value. In some jurisdictions, that’s permanent until the next reassessment. In others, the assessment automatically increases each year by a small percentage, regardless of market conditions. Some areas reassess frequently, others less often.

Every few years, depending on your location, the assessor may conduct a full reassessment of all properties. This involves looking at recent sales in your area, evaluating property characteristics, and potentially adjusting assessed values. Reassessments can result in significant increases if the market has appreciated or if your property’s actual characteristics don’t match the assessor’s records.

Home improvements can trigger an assessment increase. If you add a bedroom, a bathroom, a deck, or solar panels, the assessor may increase your assessed value to reflect that improvement. This is a real trade-off. The improvement increases your home’s value and your comfort, but it may also increase your property taxes permanently. Some homeowners avoid visible improvements for this reason. Others accept it as a cost of living in an improving home.

The assessment process is not transparent to most homeowners. Assessors use formulas and comparable sales data, but homeowners typically don’t see the calculations. This opacity is why many assessments go unchallenged. People don’t realize they can challenge them.

Challenging Your Assessment

You almost certainly have the right to challenge your assessment, though the process varies by jurisdiction. Most areas allow homeowners to file a grievance or appeal within a certain window, often 30 to 60 days after receiving the assessment notice.

When is it worth challenging? If your assessment is significantly higher than comparable homes in your neighborhood, if the assessor has recorded incorrect property features (a square footage error, for example), or if the market value has declined since the last assessment. You won’t get your taxes lowered because you wish they were lower. But if you have evidence that the assessment is wrong, you have a case.

Evidence that matters includes comparable sales of similar homes in your area that sold for less, photos or documentation of issues on your property that should reduce value, or proof that the assessor has made factual errors in recording your property’s characteristics. If five homes similar to yours sold for 10 percent less than your assessed value, that’s compelling evidence.

The process is usually straightforward. You file a grievance form, present your evidence, and wait for the assessor to respond. Some jurisdictions have informal meetings where you can discuss it. Others are more formal. The cost of appealing is typically free if you do it yourself. Some homeowners hire assessment professionals to help, which can cost $300 to $1,000, but you might save that much in annual taxes through a successful reduction. Many successful appeals result in modest reductions, not dramatic changes. You might lower your taxes by $500 to $1,500 annually if you prevail, but you won’t get a 50 percent reduction unless the assessment was egregiously wrong.

The success rate for appeals depends on your local market and how reasonable your claim is. In many areas, 30 to 50 percent of appeals result in some reduction. If the assessment is clearly wrong, your chances are good. If you’re arguing that your home should be worth 10 percent less simply because you feel taxes are too high, you won’t succeed.

Tax Relief and Exemptions

Some homeowners qualify for property tax relief. A homestead exemption reduces the assessed value of your primary residence by a fixed amount or percentage, lowering your tax bill accordingly. Homestead exemptions vary dramatically by state and even by county. Some states offer substantial exemptions, others minimal. You typically have to apply and declare that the property is your primary residence.

Age and disability exemptions are available in some jurisdictions. If you’re over 65 or have a qualifying disability, you may be eligible for a reduction. Again, eligibility and amounts vary.

Special assessments are separate from annual property taxes. They’re charges levied by your municipality for specific improvements benefiting your property, like a new sewer line, road improvement, or water system upgrade. You’ll be notified when special assessments are planned, but you won’t always be happy about them. These are legitimate costs, but they’re often frustrating because they appear suddenly and can be substantial.

If your lender handles your property taxes through escrow, understand that you’re prepaying them each month. The lender collects roughly one-twelfth of your expected annual tax bill with each mortgage payment and holds it in escrow. Periodically, the lender will review your escrow account and may increase your monthly payment if they underestimated your taxes. You can request a detailed escrow statement and review it for accuracy. Errors happen, and if they do, you might be owed a refund.

The Tax Deduction Question

Property taxes are deductible on your federal tax return if you itemize deductions. However, the Tax Cuts and Jobs Act of 2017 capped the deduction for state and local taxes (SALT) at $10,000 annually. If your property taxes alone exceed $10,000, you can only deduct $10,000. This significantly reduced the benefit of property tax deduction for many homeowners, especially those in high-tax areas. Consult a CPA to understand whether itemizing makes sense for your situation. For many homeowners, the standard deduction is larger, meaning the property tax deduction benefits them only on paper.

Your property tax is not negotiable in the sense that you owe it. But understanding it, challenging it if warranted, and knowing what exemptions you qualify for is smart financial planning. The time you invest in understanding your local tax system can pay off through the life of your homeownership.

© The Whole Home Guide