Where to send your Maryland state tax payment

Maryland accepts state tax payments through three main channels: online through the Comptroller's website, by mail to a specific address, or by phone. The method you choose depends on whether you want to pay when ready, need a record for your records, or prefer to mail a check.

The online portal is the Maryland Comptroller of the Treasury's payment system. You can pay individual income tax, corporate tax, or other state taxes through this system using a bank account or credit card. Payments made online are processed the same day if submitted before the important date, and you receive a confirmation number when ready.

If you mail a payment, send your check or money order to the Maryland Comptroller of the Treasury at 301 West Preston Street, Baltimore, MD 21201. Include your tax return or a payment voucher with your name, address, and tax identification number so the payment reaches the correct account. Mail payments should arrive at least one week before the important date to may support they post on time.

Key Takeaways

  • Maryland's online payment system through the Comptroller's website processes payments the same day and gives you an when ready confirmation number.
  • Mailed checks should be sent to the Comptroller of the Treasury in Baltimore and should arrive at least one week before your tax important date.
  • Phone payments are available through the Comptroller's office, though you will need your tax information and payment amount ready.
  • Payment methods accepted online include bank account transfers and credit cards, each with different processing times and fees.
  • Keep your confirmation number or mailed receipt as proof of payment in case the state needs to verify the transaction later.

Paying online through the Maryland Comptroller's website

The fastest way to pay Maryland state taxes is through the Comptroller's online payment portal. Go to the Maryland Comptroller of the Treasury website and look for the "Pay Taxes Online" or "Make a Payment" section. You will need your Social Security number or federal employer identification number, your tax year, and the amount you owe.

During checkout, you choose your payment method: electronic bank transfer (ACH) or credit card. Bank transfers typically have no fee and post within one to two business days. Credit card payments process when ready but charge a convenience fee, usually between 2 and 3 percent of the payment amount. The system will show you the exact fee before you confirm.

After you submit, the system generates a confirmation number on screen. Write this down or take a screenshot — it serves as your receipt and proof that Maryland received your payment. If you pay before the tax important date, your payment counts as on-time even if it takes a day or two to post to your account.

Mailing a check or money order

Some people prefer to mail a physical check because there is no fee and they have a paper trail. Write your check or money order to the "Comptroller of the Treasury" and include it with a payment voucher or a copy of your tax return showing your name, address, and the amount owed.

The mailing address is: Comptroller of the Treasury, 301 West Preston Street, Baltimore, MD 21201. Do not mail to any other address — payments sent elsewhere may be delayed or lost. Mail your payment at least seven to ten days before the important date to account for postal delays.

The postmark date is what counts, not the date the Comptroller receives it. If your check is postmarked by the important date, Maryland considers it on-time. Keep a copy of the check front and back, or note the check number, as proof of payment.

Paying by phone

You can also pay Maryland state taxes by phone through the Comptroller's office. Call the number listed on your tax notice or the Comptroller's main line to speak with a representative who can process your payment over the phone.

Have your tax information ready: your Social Security number or FEIN, the tax year, and the exact amount you owe. The representative will ask for your bank account details or credit card information to process the payment. Like online payments, phone payments by bank account are usually free, while credit card payments charge a convenience fee.

Ask for a confirmation number before you hang up and write it down. This number proves you made the payment and when you made it, which is important if there is ever a question about whether the payment arrived.

What happens if you miss the important date

If your payment arrives after the tax important date, Maryland charges interest and penalties on the unpaid amount. Interest accrues from the original due date and compounds monthly. Penalties vary depending on how late the payment is and whether you filed your return on time.

If you know you will be late, contact the Comptroller's office to discuss your options. In some cases, you may be able to set up a payment plan or request a short extension. Paying as soon as you can, even if late, stops the interest from growing further.

Estimated tax payments

If you are self-employed or have income that is not subject to withholding, Maryland requires you to make quarterly estimated tax payments. These are due on April 15, June 15, September 15, and January 15 of the following year.

You can pay estimated taxes using the same online system, by mail, or by phone as regular tax payments. The Comptroller's website has a form to calculate your estimated payment amount based on your expected income for the year. Paying estimated taxes on time helps you avoid penalties and interest when you file your annual return.

Frequently Asked Questions

What if I pay online but my payment doesn't show up in my account right away?

Bank transfer payments typically post within one to two business days, while credit card payments process the same day. Check your confirmation number on the Comptroller's website to verify the payment was received. If more than two business days have passed and the payment still does not appear, contact the Comptroller's office with your confirmation number.

Can I pay Maryland taxes with a credit card without a fee?

No. Credit card payments always include a convenience fee, usually 2 to 3 percent of the amount you pay. Bank account transfers and mailed checks have no fee. If you want to avoid the fee, use a bank transfer or mail your payment instead.

What if I overpaid my Maryland taxes?

If you paid more than you owed, the Comptroller will send you a refund or allow you to explore the overpayment to next year's taxes. You can choose which option you prefer when you file your return or contact the Comptroller's office to request a refund.

Do I need to include anything with my mailed payment besides the check?

Yes. Include a payment voucher from your tax notice or a copy of your tax return showing your name, address, and tax identification number. This helps the Comptroller match your payment to your account. Without this information, your payment may be delayed or applied to the wrong account.

Is there a way to pay Maryland taxes in installments?

If you cannot pay the full amount by the important date, contact the Comptroller's office to discuss a payment plan. The office may allow you to pay in installments, though interest and penalties will continue to accrue on the unpaid balance until the full amount is paid.