New Jersey Estate Tax Filing Guide for Executors

If you've been named the executor of an estate in New Jersey, one of your most pressing responsibilities is handling the estate tax filing. Miss a deadline or file the wrong form, and the estate and you personally could face penalties. This article walks you through exactly what you need to do, step by step, so you can fulfill your duties correctly and without unnecessary stress.

What does an executor actually have to do for New Jersey estate tax?

An executor (also called a personal representative) is legally responsible for settling a deceased person's affairs. In New Jersey, this includes determining whether the estate owes state estate tax, preparing and filing the return, and paying any tax due from estate assets.

New Jersey is one of the few states that still imposes its own estate tax separate from the federal estate tax. The state uses a different exemption threshold than the federal government, which means an estate could owe nothing to the IRS but still owe New Jersey. Understanding this distinction is the starting point for every executor.

The New Jersey estate tax applies to the entire gross estate real property, bank accounts, investments, life insurance payable to the estate, and other assets. The executor must account for all of these when determining whether a filing is required.

Who needs to file a New Jersey estate tax return?

A New Jersey estate tax return must be filed if the decedent's gross estate exceeds the state's filing threshold. New Jersey currently uses a threshold equivalent to the federal estate tax exemption amount (as adjusted for inflation). For deaths occurring in 2024, that threshold is $6,830,000. Prior to 2018, the threshold was $2,000,000, so if you are handling an older estate, be sure to verify the correct amount.

Even if you believe the estate falls below the threshold, you may still need to file a protective return to preserve certain elections or if the value of the estate is unclear. Filing a protective return is a common strategy when assets are difficult to value, such as closely held business interests or real estate that hasn't been appraised yet.

If you're unsure whether the estate meets the filing threshold, reviewing the New Jersey estate tax threshold and filing requirements can help clarify your situation.

Which forms do you need to complete?

The primary form for New Jersey estate tax is Form IT-Estate, which is the estate tax return itself. You may also need to file Form IT-R, the New Jersey inheritance tax return, depending on the beneficiaries and the nature of the transfers.

Here's a breakdown of the key documents:

Form IT-Estate – The main estate tax return reporting the gross estate, deductions, and any tax owed.
Form IT-R – Required when the estate includes transfers subject to the New Jersey inheritance tax. Filing Form IT-R correctly is critical because the inheritance tax is separate from the estate tax and has its own rules.
Federal Form 706 – Even if the estate doesn't owe federal tax, you may need to file a federal return to make certain elections (such as portability of the deceased spouse's unused exemption) that affect the New Jersey calculation.
Supporting schedules and documents – Appraisals, death certificates, prior gift tax returns, trust documents, and proof of deductions.

The New Jersey Division of Taxation requires detailed schedules that mirror many of the items on the federal return. Having your federal return prepared first often makes the state filing easier.

How do you file the return step by step?

Step 1: Gather the necessary information

Collect all records of the decedent's assets and liabilities as of the date of death. This includes bank statements, brokerage accounts, real estate deeds, life insurance policies, retirement account statements, and any outstanding debts or mortgages. You'll also need a certified copy of the death certificate.

Step 2: Get appraisals for major assets

Real estate, business interests, art, jewelry, and other non-liquid assets need to be valued at fair market value as of the date of death. Use qualified appraisers the Division of Taxation can challenge valuations that appear low.

Step 3: Prepare the federal return first

Even if no federal tax is due, preparing Form 706 gives you the numbers you need for the state return and helps ensure consistency. The New Jersey return references many federal calculations, so this order saves time and reduces errors.

Step 4: Complete Form IT-Estate

Fill out the New Jersey estate tax return using the values from the federal return, adjusted for any New Jersey-specific rules. Pay attention to deductions New Jersey allows a marital deduction and a charitable deduction similar to the federal rules, but the allowable deductions may differ in some respects.

Step 5: File and pay

The return must be filed with the New Jersey Division of Taxation. New Jersey now accepts electronic filing for estate tax returns, which can speed up processing. If you need details on how to submit electronically, the electronic submission process for New Jersey taxes covers that in detail. Payment is due with the return unless you arrange an installment plan.

What are the deadlines?

New Jersey estate tax returns are due nine months after the date of death. You can request a six-month extension to file the return by submitting a written request to the Division of Taxation before the original due date. However, an extension to file is not an extension to pay estimated tax must still be paid by the nine-month deadline to avoid interest and penalties.

Late filings are subject to penalties of 5% per month on the unpaid tax, up to a maximum of 25%. Interest also accrues from the original due date. These costs come out of the estate, which means beneficiaries receive less.

What mistakes do executors commonly make?

Several errors come up repeatedly with New Jersey estate tax filings:

Missing the filing deadline. Nine months goes by quickly when you're also dealing with grief, probate, and asset management. Put the deadline on your calendar immediately.
Confusing the estate tax with the inheritance tax. These are two separate taxes in New Jersey. The estate tax is paid by the estate; the inheritance tax is owed by beneficiaries based on their relationship to the decedent. The step-by-step guide to NJ inheritance tax returns explains the difference in more detail.
Undervaluing assets. Using outdated or informal valuations instead of proper appraisals can trigger an audit and result in additional tax plus penalties.
Forgetting about lifetime gifts. New Jersey requires you to include certain gifts made within three years of death (called "gifts in contemplation of death") in the gross estate. Omitting these is a red flag for auditors.
Not filing a protective return. When asset values are uncertain, failing to file a protective return can cost the estate valuable rights to claim deductions or refunds later.
Failing to coordinate with the federal return. Inconsistencies between the federal and state returns invite scrutiny from both the IRS and the Division of Taxation.

How can executors make the process less painful?

A few practical steps can save you significant time and money:

Hire a professional early. A CPA or estate attorney experienced with New Jersey tax filings can catch issues before they become problems. The cost of professional help is an allowable estate administration expense.
Keep meticulous records. Document every decision, every valuation, and every communication with the Division of Taxation. If the estate is ever audited, this paper trail is your best defense.
Communicate with beneficiaries. Let them know what's happening with the filing timeline. Some beneficiaries may owe inheritance tax, and they'll need time to prepare.
Don't distribute assets too early. Wait until the tax situation is resolved before making final distributions. If the estate ends up owing more than expected, you may need to recover money from beneficiaries and that gets uncomfortable fast.

Executor's estate tax filing checklist

Use this checklist to stay on track:

Obtain certified death certificates (order extra copies).
Inventory all assets and liabilities as of the date of death.
Determine whether the estate exceeds the New Jersey filing threshold.
Get qualified appraisals for real estate, business interests, and high-value personal property.
Prepare the federal estate tax return (Form 706) first.
Complete Form IT-Estate using federal return values and NJ-specific adjustments.
Determine whether Form IT-R (inheritance tax return) is also required.
File the return and pay any tax owed within nine months of death.
Request a filing extension before the deadline if you need more time (but pay estimated tax on time).
Keep copies of everything you file and every payment you make.
Do not make final distributions until you've received clearance from the Division of Taxation.

Tip: If you're handling both the estate tax and inheritance tax filings, start with the estate tax return and let those numbers inform the inheritance tax work. Many executors find that coordinating the two filings and understanding the threshold and filing requirements for beneficiaries prevents costly rework down the road. When in doubt, call the New Jersey Division of Taxation's estate tax unit at (609) 292-5033 before the deadline rather than after.