Nassau County property tax grievances
Your neighbors got their taxes trimmed. Did you?
We file your assessment grievance with the county for you. Our fee is 30% of your first-year savings, and only if you win. Most firms charge 50%.
Example · a typical home we reviewed
No reductionno fee
- Our one-time fee (30%)$626
- A 50% firm would take$1,044
- You keep in year one$1,462
Got a letter from us?
Open your authorization.
Scanning the QR code on your letter opens it, already filled in for your home. No camera handy? Type the six-character code printed under the QR code.
Rather talk before you do anything?
Call me.Xiongwei Li, CPA. Nothing is signed or filed until you say so.
The short version
What a grievance is.
Your property tax is based on the value the county assigns to your home. If that value is too high compared with similar homes, you can ask the county's Assessment Review Commission to lower it. That request is called a grievance.
Many Nassau homeowners file every year. Those who never file often pay more than their neighbors for a similar house.
How it works
You sign. We do the rest.
- Sign on your phoneTwo minutes. No payment. You get a copy right away.
- We prepare your caseWe research comparable sales for your home and build the filing.
- We file for youBetween January 4 to March 1, 2027, with Nassau County's Assessment Review Commission.
- The county decidesA reduction applies to the 2028/29 tax year and you pay 30% of that first year's savings, once. No reduction, nothing owed.
Xiongwei Li, CPANY license 117168
Who we are
A CPA's office, pointed at one problem.
Long Island Tax Trim is led by Xiongwei Li, CPA, of Li CPA Group, an accounting practice serving New York families and small businesses. We check whether Nassau County homeowners are over-assessed, and we file the paperwork to fix it.
We charge less because the research is largely automated. You still deal with a person: (516) 518-6678.
No letter?
Ask for a free review of your home.
Tell us the address. We'll check your assessment against comparable homes and tell you what we find. No cost and no obligation.
Questions
What homeowners ask us.
How do I know this isn't a scam?
Fair question. We never ask for money, card or bank details, or a Social Security number, and you owe nothing unless the county lowers your assessment. The authorization only lets us file a grievance for one tax year, and you can cancel before we file. You can look up our company in the New York Department of State's database, read the county's own description of this process, and call us at (516) 518-6678 before signing anything.
Can filing a grievance raise my taxes?
No. Nassau County states that its Assessment Review Commission will never increase an assessment as a result of a grievance. The worst outcome is that your assessment stays the same. See the county's page.
What does it cost if I don't get a reduction?
Nothing. There is no sign-up fee and no filing fee. You owe us only if the county reduces your assessment.
Why 30% when other firms charge 50%?
Most of the work is finding comparable homes and filing on time. We automate the research, so we can charge less and still do the job properly.
I already signed with another firm. Can I switch?
Only sign one authorization per year. The county denies duplicate filings, so if another firm is already authorized for this year, stay with them or cancel with them in writing first.
Do I have to do this every year?
A grievance covers one tax year, so most homeowners file annually. We'll contact you before each filing window, and you decide each year whether to continue.
Can I do this myself?
Yes. Any homeowner can file with the county at no charge. We do the comparable-sales research, the filing and the follow-up for you.
Miss March 1, and you wait a year.
The county accepts grievances from January 4 to March 1, 2027. Signing takes two minutes, costs nothing now, and costs nothing at all unless you win.