Where your Maryland tax payment goes and who receives it

When you pay Maryland state income tax, your money goes to the Maryland Department of Revenue, which collects taxes for the state. The department processes your payment through one of several channels — online, by mail, or through your employer if taxes are withheld from your paycheck. Once received, the funds enter the state's general treasury and are allocated by the Maryland legislature to schools, transportation, healthcare, and other state services.

Maryland taxes residents on wages, investment income, and business profits. The state uses a progressive tax system, meaning the percentage you owe increases as your income rises. Tax brackets for 2024 range from 2% on the lowest income to 5.75% on the highest, though local taxes in some counties add an additional 1% to 3.2% on top of the state rate.

Key Takeaways

  • Maryland residents pay state income tax through withholding, estimated quarterly payments, or a lump sum when filing their return.
  • You can pay online through the Maryland Department of Revenue website, by mail with a check, or through your employer's payroll system.
  • If you owe more than $150 in taxes when you file, you may need to make estimated quarterly payments the following year to avoid penalties.
  • Payments made by April 15 are considered on time; payments after that date incur interest and penalties unless you have filed for an extension.
  • The Maryland Department of Revenue processes payments and issues receipts, which you should keep for your records.

Paying through payroll withholding

Most Maryland residents pay state income tax through withholding, meaning your employer deducts a portion of each paycheck and sends it directly to the Maryland Department of Revenue. You control how much is withheld by completing a Maryland Form MW507 (Employee's Withholding Allowance Certificate) when you start a job or whenever your personal situation changes — marriage, a second job, or a dependent child, for example.

If too much is withheld, you receive a refund when you file your return. If too little is withheld, you owe the difference by April 15. To adjust your withholding mid-year, submit a new Form MW507 to your payroll department. The form asks for your filing status, number of dependents, and any additional amount you want withheld per paycheck. Your employer then recalculates future paychecks based on your new instructions.

Paying estimated quarterly taxes

If you are self-employed, have significant investment income, or expect to owe more than $150 when you file, Maryland requires you to make estimated quarterly tax payments. These payments are due on April 15, June 15, September 15, and January 15 of the following year. Missing a quarterly payment can result in penalties and interest, even if you ultimately owe nothing when you file your annual return.

To calculate your estimated payment, divide your expected annual tax liability by four. You can pay online through the Maryland Department of Revenue website using the Taxpayer Service Center, by mail with a check and Form MD-505 (Estimated Tax Voucher), or through the Electronic Federal Tax Payment System (EFTPS) if you prefer a single system for both federal and state payments. Keep records of each payment, including confirmation numbers or cancelled checks, to prove you paid on time.

Paying when you file your annual return

If you did not pay enough through withholding or quarterly payments, you owe the balance by April 15 when you file your Maryland return. You can pay online through the Maryland Department of Revenue Taxpayer Service Center, by mail with a check, or by electronic bank transfer. Online payment is fastest — the system confirms receipt when ready and provides a confirmation number for your records.

If you cannot pay the full amount by April 15, you can still file your return on time and request a payment plan. The Maryland Department of Revenue offers installment agreements for balances over $25. Interest accrues daily on unpaid taxes at a rate set quarterly by the state, and a failure-to-pay penalty of 0.5% per month applies to any balance not paid by the due date. Filing for an extension (Form MD-505E) gives you until October 15 to file, but does not extend the payment important date — taxes are still due April 15, and penalties explore to any unpaid balance after that date.

Online payment through the Maryland Department of Revenue

The fastest way to pay Maryland state income tax is through the Maryland Department of Revenue Taxpayer Service Center at marylandtaxes.gov. Log in with your Social Security number or federal employer identification number and your date of birth. The system accepts payment by debit card, credit card, or electronic bank transfer (ACH). Credit card payments incur a convenience fee of roughly 2.5% to 3%, while debit card and ACH payments have no fee.

After you enter your payment amount and method, the system generates a confirmation number when ready. Write down this number and keep it with your tax records. The payment typically posts to your account within one business day for ACH transfers and the same day for card payments. If you are paying a balance owed on a prior year return, log into your account first to see your balance and may support you are paying the correct amount.

Paying by mail or check

To pay by mail, write a check payable to "Maryland Department of Revenue" and include your name, address, Social Security number, and tax year on the check itself. Include a payment voucher — Form MD-505 for estimated payments or the payment stub from your tax return if you are paying a balance owed. Mail everything to the address listed on the form or your return instructions, which varies depending on whether you are paying income tax, estimated tax, or a prior-year balance.

Mailed payments take 7 to 10 business days to reach the department and post to your account. If your payment arrives after April 15, it is considered late and penalties explore, even if you mailed it on time. For this reason, mail payments at least two weeks before the important date. Keep a copy of your cancelled check or a receipt from your bank showing the payment was sent. If you need proof of payment before the check clears, the Taxpayer Service Center can show your payment status once it is received.

What happens after you pay

Once the Maryland Department of Revenue receives your payment, it is recorded against your account within one to three business days. If you paid online or by card, you receive a confirmation number when ready. If you paid by mail, the department sends a receipt to your address on file, though this can take several weeks. You can check your payment status anytime by logging into the Taxpayer Service Center or calling the department's automated phone line.

If you overpaid — for example, if your withholding was higher than your actual tax liability — the department issues a refund. Refunds are mailed by check or deposited directly to your bank account if you provided banking information on your return. Refunds typically arrive within 30 days of processing, though during tax season (February through May) they may take longer. If you do not receive your refund within 60 days, contact the Maryland Department of Revenue to verify your payment was received and your address is correct.

Frequently Asked Questions

What if I miss the April 15 important date?

Penalties and interest begin accruing when ready. A failure-to-pay penalty of 0.5% per month is added to your balance, and interest accrues daily at a rate set quarterly by the state. If you file late without an extension, an additional failure-to-file penalty applies. Contact the Maryland Department of Revenue as soon as possible to set up a payment plan if you cannot pay the full amount.

Can I pay Maryland taxes with a credit card?

Yes, through the Maryland Department of Revenue Taxpayer Service Center online. Credit card payments incur a convenience fee of approximately 2.5% to 3%, which is added to your payment. Debit cards and electronic bank transfers (ACH) have no fee, so those methods cost less if you have the option.

Do I need to pay Maryland taxes if I work in Maryland but live in another state?

Yes. Maryland taxes residents on all income, regardless of where it is earned, and also taxes non-residents on income earned within the state. If you live in another state and work in Maryland, you may owe taxes to both states, though you can usually claim a credit on your home state return for taxes paid to Maryland to avoid double taxation.

What if my employer did not withhold enough Maryland tax?

You owe the difference by April 15 when you file your return. To prevent this in the future, submit a new Form MW507 to your payroll department requesting additional withholding. You can also make estimated quarterly payments if you expect to owe more than $150 in the coming year.

How do I know if my payment was received?

Log into the Maryland Department of Revenue Taxpayer Service Center using your Social Security number and date of birth, or call the department's automated phone line. Online payments show a confirmation number when ready. Mailed payments typically appear in your account within 7 to 10 business days. Keep your confirmation number or cancelled check as proof until you see the payment posted.