Property Tax Appeal Deadline

When is your property tax appeal deadline?

Miss it and you usually wait a full year — three in Maryland. We show your county's verified date, or we show no date at all. We never guess one.

Leave the date blank if you have not had a notice. In several states the entire clock runs from that date, so we will ask for it.

Your property tax appeal deadline is the single most important fact in this entire process, and it is
the one almost nobody can find. Miss it and you do not get a second try. You wait a full year, paying the higher bill
every month of it — and in Maryland you wait three.

The tool above gives you the verified date for your county, counts the days you have left, and tells you exactly which
office takes the form. It is free and there is no sign-up.

And where the truth is that there is no fixed date, it says so rather than inventing one. That sounds like a small
thing. It is not. A wrong property tax appeal deadline is worse than no page at all, because it makes a homeowner relax
until the day after their window shut.

Why there is no national property tax appeal deadline

Property tax is the most local tax there is. It is set by your county, your city and your school district, and so is
the calendar. There is no federal date. There is often not even a single state date.

California certifies each county’s deadline every year: Santa Clara is September 15, Los Angeles is November 30. New
York calls it Grievance Day, and it is not one day — most of the state is the fourth Tuesday in May, but Suffolk
is the third Tuesday, Erie is the first Tuesday in June and Westchester is the third Tuesday in June.

This is why a generic answer to the property tax appeal deadline question is useless. Your property tax appeal deadline is a property of your county, and nothing
else.

Five property tax appeal deadlines almost every website gets wrong

New Jersey is not all April 1. Monmouth, Gloucester and Burlington run an alternative assessment
calendar with a January 15 deadline. A homeowner in Middletown reading a generic April 1 page has
already missed their window by three months.

Texas is not simply May 15. It is May 15 or 30 days after your notice, whichever is later.
Everyone drops the second half, and in doing so tells a homeowner with a late notice that they are out of time when they
are not.

Pennsylvania’s August 1 falls on a Saturday in 2026. Bucks County confirms in writing that the real
date this year is Monday, August 3. And Allegheny is not March 31, whatever the internet says — its own office now
runs July 1 to September 1.

Maryland has no county assessor at all. The state assesses everything through SDAT, on a three-year
cycle, and you get 45 days from the notice.

Florida is 25 days. Not from a date on a calendar — from the day your TRIM notice is mailed,
in mid-August. It is the shortest window in the country.

When your property tax appeal deadline starts on your notice, not on a date

In a large group of states there is nothing to look up, because your property tax appeal deadline is calculated from
the date printed on your own assessment notice.

Georgia gives you 45 days from the mailing date. Arizona gives 60 from the Notice of Value. Alabama, New Mexico,
Oklahoma, Wyoming, Montana, Alaska and Kansas all give 30. South Carolina gives a generous 90. Vermont gives you just
14 days to appeal a grievance decision to the Board of Civil Authority — one of the shortest
windows anywhere in America.

The rule to live by: open the notice the day it arrives and write the deadline on the calendar. Do
not put the envelope on the counter. That envelope is a countdown, and in Florida it is a 25-day one.

Michigan, and the deadline that is really a gate

Michigan deserves its own warning, because it is not a deadline in the ordinary sense.

The March Board of Review is mandatory. If you do not go through it, the Michigan Tax Tribunal has no
jurisdiction over your residential appeal at all. Your property tax appeal deadline was really a gate, and you walked past it. It does not matter how strong your evidence is or how badly your home
is over-assessed — you have lost the entire year on a procedural point most homeowners have never heard of.

Several states hide a step like this. It is the reason to check the actual process, not just the date.

What actually happens if you miss your property tax appeal deadline

You wait. Missing the property tax appeal deadline means, in most of the country, a full year at the higher assessment, and there is almost never a
late-filing option — Ohio’s window is statutory and strict, and no amount of explaining will reopen it.

In Maryland it is worse. Assessments run on a three-year cycle, so missing the 45 days means three years
of overpaying before you get another look.

But missing it does not leave you helpless, and this is the part nobody tells you. Exemptions run on a completely
different clock, and many are still open when the appeal window has shut. Factual errors on your property record card
— the wrong square footage, a bathroom you do not have, a garage demolished years ago — can often be
corrected outside the appeal process entirely. Ask for the card. It costs nothing.

What to do with the days you have left

Check the facts before you argue the value. Ask your assessor for the property record card. A
surprising share of assessments are simply wrong on the details, and factual errors are the easiest appeals to win
because there is nothing to argue about.

Build comparables that sold. Three to five homes near you, similar in size, age and condition, that
actually sold in the last six to twelve months for less than your assessed market value. Boards ignore opinions. They
respond to sales.

Take the free informal review first. In most places there is an informal step before any hearing, and
it settles a large share of cases without you ever standing in front of a board.

Do not file on the last day. Several offices require the form to be received, not
postmarked. People lose on this every year, having done everything else right.

Common questions about the property tax appeal deadline

Can I get an extension?
Almost never. These dates are statutory in most states, and the board has no power to waive them even if it wants to.
That is exactly why the date matters more than the evidence.

My notice never arrived. Am I out of luck?
Not necessarily. In states where the clock runs from the notice, a notice that was never mailed can be grounds to reopen
the window — but you must raise it with the office quickly. Call.

Is the appeal deadline the same as the exemption deadline?
No, and confusing the two is one of the most expensive mistakes in property tax. They are separate clocks, usually on
different dates, and missing one has no effect on the other.

Can appealing make my taxes go up?
A review looks at your value again, so in principle it can move either way. In practice that is uncommon when you bring
genuine sold comparables — which is why you check them before you file.

Is one win worth the trouble?
Usually far more than people think. Georgia’s 299C rule locks a successful appeal for three years. New Jersey’s Freeze
Act binds the assessor for two more. Pennsylvania counties use a base year and many have not reassessed in decades, so a
corrected value there can stand for a very long time.

More property tax tools and guides

Where our dates come from

Informational only. Know Property Tax is not a government agency, not a county assessor, and not a tax-appeal service,
and this is not legal, tax, or financial advice. Deadlines change, and some counties do not publish them at all. Always
confirm your property tax appeal deadline with your county office before you rely on it.