Maryland Estate Tax Filing Guide for Executors

If you've been named the executor of someone's estate in Maryland, one of your core responsibilities is filing the estate tax return correctly and on time. Getting this wrong can delay probate, cost the estate money, and create legal headaches for you personally. These Maryland estate tax return filing instructions for executors will walk you through the process step by step, so you know exactly what's required, what deadlines apply, and how to avoid the errors that trip up most first-time filers.

What Does Filing a Maryland Estate Tax Return Actually Involve?

When someone dies owning property or assets in Maryland, their estate may owe state estate taxes. The executor the person named in the will or appointed by the court is responsible for determining whether a return is due, gathering the necessary financial information, completing the proper forms, and submitting them to the Comptroller of Maryland.

Maryland's estate tax applies to estates that exceed a certain threshold. As of 2024, that exemption amount is $5 million, indexed for inflation. If the total gross estate is valued above that amount, a return must be filed even if the estate ultimately owes no tax after deductions. This is different from the inheritance tax, which is assessed on what individual beneficiaries receive. You can read more about when Maryland inheritance tax is due after the death of a property owner if you need clarity on that separate obligation.

Who Is Responsible for Filing the Estate Tax Return?

The executor or personal representative carries the legal duty to file. If no executor was named or appointed, the responsibility may fall on an administrator appointed by the Orphan's Court in the county where the deceased lived. This person must:

Inventory all assets owned by the deceased at the time of death
Obtain professional appraisals for real estate, business interests, and valuable personal property
Calculate the gross estate value
Claim allowable deductions
File the return and pay any tax owed

Even if you're an out-of-state executor or dealing with out-of-state beneficiaries, Maryland still requires you to meet these obligations if the deceased owned property in the state.

Which Forms Do Executors Need to File?

Maryland requires the filing of Form MET-1 (Maryland Estate Tax Return). This is the primary form used to report the estate's value, deductions, and calculate any tax owed. Supporting schedules must be attached to detail specific asset categories.

You may also need to file a federal estate tax return (IRS Form 706) if the estate exceeds the federal exemption threshold, which is significantly higher than Maryland's. The federal return serves as a reference point, and Maryland's Comptroller may request a copy.

Key Schedules Typically Required

Schedule A: Real estate owned by the deceased
Schedule B: Stocks, bonds, and other securities
Schedule C: Mortgages, notes, and cash
Schedule D: Insurance policies on the deceased's life
Schedule E: Jointly owned property
Schedule F: Other miscellaneous assets
Schedule G: Transfers made within three years of death
Schedule J–K: Deductions for expenses, debts, and charitable bequests

If you need a walkthrough on completing these forms, our step-by-step guide to filling out the Maryland inheritance tax form covers the process in detail.

What Is the Deadline for Filing?

The Maryland estate tax return is due nine months after the date of death. The Comptroller's office may grant a six-month extension if you file a written request before the original due date, but this extension applies only to filing not to payment. If tax is owed, interest begins accruing from the original due date regardless of any extension.

Late filing can result in penalties and interest. If the estate is complex or you need more time to gather appraisals, file the extension request early. Don't wait until the last minute.

How Is the Estate Valued for Tax Purposes?

Maryland uses the date-of-death value for all assets, unless the executor elects an alternate valuation date (six months after death). This election is only available if it reduces both the gross estate value and the estate tax owed.

Common asset categories that must be valued include:

Real property (homes, land, rental properties)
Bank accounts and certificates of deposit
Retirement accounts (IRAs, 401(k)s)
Life insurance proceeds payable to the estate
Business interests (sole proprietorships, partnerships, LLCs)
Vehicles, jewelry, art, and collectibles
Stocks, bonds, and mutual funds

For assets like real estate and business interests, you'll likely need a qualified appraiser. Using outdated tax assessments or Zillow estimates instead of proper appraisals is one of the common mistakes on Maryland inheritance tax forms that can trigger audits or re-assessments.

What Deductions Can the Estate Claim?

Maryland allows several deductions that can reduce the taxable estate value:

Funeral expenses (reasonable and customary costs)
Administration expenses (executor fees, attorney fees, accounting fees)
Outstanding debts of the deceased (mortgages, credit cards, medical bills)
Charitable contributions made through the will
Marital deduction for property passing to a surviving spouse
Qualified family-owned business deduction (subject to specific conditions)

Keep detailed records and receipts for every deduction you claim. The Comptroller's office can disallow deductions that aren't properly documented.

Where Do You File the Return and How Do You Pay?

The completed MET-1 form, along with all supporting schedules, is filed with the Comptroller of Maryland, Estate Tax Section. You can submit it by mail, and the Comptroller's office also accepts electronic submissions in some cases.

Payment can be made by check or electronic transfer. If the estate doesn't have enough liquid assets to pay the tax immediately, the executor may need to sell estate assets or arrange a payment plan. The Comptroller has the authority to approve installment payments for larger estates under certain conditions. For reference, the official filing information is available on the Maryland Comptroller's estate tax page.

What Happens After You File?

Once the Comptroller receives the return, it will be reviewed. If everything is in order, you'll receive a tax clearance certificate, which confirms the estate tax obligation has been satisfied. You need this certificate before you can close the estate and distribute remaining assets to beneficiaries.

If the Comptroller identifies issues incorrect valuations, missing schedules, or unreported assets you may receive a notice requesting additional information or an adjusted tax assessment. Respond promptly to avoid further penalties.

What Are the Most Common Mistakes Executors Make?

After handling estate filings, certain errors come up again and again:

Missing the nine-month deadline because the executor didn't realize how quickly it arrives
Underreporting asset values, especially for real estate or collectibles
Confusing the inheritance tax with the estate tax they are separate taxes with different rules
Failing to report gifts made within three years of death, which Maryland includes in the gross estate
Not keeping receipts for deductible expenses
Distributing assets before receiving tax clearance

Reviewing the common mistakes on Maryland inheritance tax forms before you submit can save you weeks of back-and-forth with the Comptroller's office.

Should You Hire a Professional to Help?

Maryland's estate tax return involves financial details that can get complicated quickly especially when the estate includes real property, business interests, or assets in multiple states. While it's not legally required to hire a tax attorney or CPA, most executors benefit from professional help because:

Appraisals must meet specific standards to be accepted
Deductions have strict documentation requirements
Filing errors can result in personal liability for the executor
A professional can identify tax-saving strategies the executor might miss

Attorney and accounting fees paid for estate tax preparation are themselves deductible administration expenses, so the cost partially offsets the tax.

Executor Filing Checklist for Maryland Estate Tax

Get appointed as executor through the Orphan's Court if not already named in the will
Obtain death certificates (at least 10–12 certified copies)
Inventory all assets as of the date of death
Arrange professional appraisals for real estate, business interests, and high-value items
Gather financial records bank statements, brokerage accounts, insurance policies, retirement account statements
Identify all debts and expenses of the estate
Determine the gross estate value and compare it to the $5 million exemption threshold
Complete Form MET-1 with all required schedules
Attach supporting documentation appraisals, receipts, account statements
File the return within nine months of the date of death (or request an extension)
Pay any tax owed by the original due date to avoid interest
Wait for tax clearance before distributing assets to beneficiaries

Tip: Start gathering documents within the first two weeks after death. The nine-month deadline goes faster than most executors expect, especially when you're also handling grief, family dynamics, and the rest of the probate process. If you're unsure about any step, the Maryland Comptroller's office can answer specific questions, and our detailed filing instructions for executors can help you stay organized throughout the process.