To check if you owe Maryland state taxes, log in to the Comptroller of Maryland’s online tools at marylandtaxes.gov or the newer Maryland Tax Connect portal at mdtaxconnect.gov, call the Collections Section at 410-974-2432 (toll-free 1-888-674-0016), or visit a taxpayer service center in person.1Comptroller of Maryland. Individual Payment Agreement – Comptroller of Maryland Any of these will show whether a balance is on file for you and what tax year it belongs to. Checking sooner rather than later matters: unpaid Maryland tax accrues interest and penalties, and the state can garnish wages, intercept federal refunds, and place liens without going to court.
What to Have Ready Before You Check
You will need your Social Security Number or Individual Taxpayer Identification Number, which is the identifier Maryland uses to locate your account and which state law requires on every income tax return.2Maryland General Assembly. Maryland Code Tax-General 10-804 Pull out your most recent Maryland Form 502; the system may ask for the filing status you used, such as single, married filing jointly, or head of household.3Comptroller of Maryland. 2025 Maryland Form 502 Resident Income Tax Return
Your mailing address must match what the Comptroller has on file, so if you have moved, keep your prior address available too. Mismatched entries can lock you out or fail verification.
Checking Online
The Comptroller’s payment portal at interactive.marylandtaxes.gov lets you make a bill payment and view the payments already made through the system.4Comptroller of Maryland. Online Payment – Comptroller of Maryland If a balance is owed, the page shows the amount due, the tax year it applies to, and any interest or penalties added. A zero balance means you are current for that period.
Maryland Tax Connect at mdtaxconnect.gov is the newer portal and covers more ground: refund status, payments, extensions, and access to tax forms.5Maryland Tax Connect. Maryland Tax Connect Guest access is available for payments. After you enter your SSN and identifying details, the system shows an account summary. If you expect a refund instead of a balance, the “Where’s My Refund” tool on the same site tracks it.
Checking by Phone or In Person
Call the Collections Section at 410-974-2432 or toll-free at 1-888-674-0016.1Comptroller of Maryland. Individual Payment Agreement – Comptroller of Maryland You will move through an automated menu before reaching a representative, who will verify your identity with your SSN, filing status, and address before discussing your account.
Taxpayer service centers, including offices in Annapolis and Baltimore, can answer general questions, accept completed returns, and provide certified copies of previously filed returns if you bring valid ID. For a specific balance review or a disputed amount, schedule an appointment through the Comptroller’s website.6Comptroller of Maryland. Our Locations
Notices That Tell You a Balance Exists
Even if you never log in, the Comptroller writes to you when something is off. The first letter is usually a tax computation notice, sent when the state believes your return contained an error and additional tax is owed. It explains the changes made and the amount the Comptroller thinks is due.7Comptroller of Maryland. Tax Tip 36 – If You Get a Notice for Personal Income Tax
If you do not respond, a formal notice of assessment follows. It shows the additional tax, a late-payment penalty, and interest, with the balance due in a prominent box on page one along with the tax year and a deadline for responding.7Comptroller of Maryland. Tax Tip 36 – If You Get a Notice for Personal Income Tax These notices are generated automatically when the system flags an underpayment or a missing return, so open Comptroller mail promptly.
How Penalties and Interest Grow the Bill
The current interest rate on unpaid Maryland tax is 9 percent per year, adjusted periodically, and it runs from the return’s original due date rather than the date of the notice.7Comptroller of Maryland. Tax Tip 36 – If You Get a Notice for Personal Income Tax A late-payment penalty is added when the Comptroller issues a notice of assessment.
Not filing at all is worse. The federal failure-to-file penalty is 5 percent of unpaid tax per month or partial month, capped at 25 percent, and Maryland imposes its own penalties separately.8Internal Revenue Service. Failure to File Penalty The combined cost of ignoring a return climbs fast.
What Happens if You Do Not Pay
Ignoring a Maryland tax debt does not clear it. The Comptroller can use several collection tools, and most do not require a court order.
- Wage garnishment: your employer can be directed to withhold up to 25 percent of your disposable earnings until the debt, penalties, and interest are paid.
- Federal refund intercept: through the Treasury Offset Program, the state can take your federal refund to satisfy the Maryland debt.9Bureau of the Fiscal Service. Treasury Offset Program – How the Treasury Offset Program Collects Money for State Agencies
- Tax liens: unpaid taxes become a lien on your real property, and once recorded in local court records the lien can attach to personal property as well.
- Bank levies: the Comptroller can seize funds directly from your bank account.
The state has up to 10 years from the date the tax was due, or 10 years from the assessment date if the assessment was made within the normal limitations period, to collect.10Maryland General Assembly. Maryland Code Tax-General 13-1103 That is a long window, and collection actions are more disruptive than simply paying the original balance.
Paying What You Owe or Setting Up a Plan
If you can pay in full, use the online payment portal; credit card payments are accepted, though a service fee applies.4Comptroller of Maryland. Online Payment – Comptroller of Maryland If you cannot, the Comptroller offers individual payment agreements that let you pay in installments. You can set one up through the Individual Online Service Center using the notice number from a recent bill, and you can add recurring automatic payments so you do not miss a due date.1Comptroller of Maryland. Individual Payment Agreement – Comptroller of Maryland
Without a notice number, or if you would rather handle it by phone, call the Collections Section at 410-974-2432 or 1-888-674-0016.1Comptroller of Maryland. Individual Payment Agreement – Comptroller of Maryland Interest keeps accruing while a plan is in place, so a faster payoff costs less overall.
If You Think the Balance Is Wrong
You can appeal an assessment you believe is incorrect, such as one that counts income that was not yours or disallows a legitimate deduction. File the appeal within 30 days of the date the notice of assessment was mailed; missing that window can make the assessment final and immediately collectible.11Comptroller of Maryland. FAQs – Hearings and Appeal Process
Send a written explanation of your disagreement with supporting documents such as W-2s, 1099s, or receipts. The Comptroller will schedule a hearing, and if that does not resolve things in your favor you can take the dispute to the Maryland Tax Court. While a timely appeal is pending, the Comptroller generally cannot pursue collection on the disputed amount.