How to Pay Maryland State Income Tax and Property Taxes

Where Maryland sends your tax bill and how payment reaches the state

Maryland's tax system splits into two main payment streams: state income tax (withheld from paychecks or paid quarterly if you're self-employed) and property tax (billed by your county assessor). Income tax goes to the Maryland Department of Revenue. Property tax stays local—your county collects it, not the state. The payment method and deadline depend on which tax you owe and whether you're paying on time or catching up on arrears.

If you're an employee, your employer withholds income tax automatically. If you're self-employed or have investment income, you make quarterly estimated payments. Property tax is billed once or twice yearly depending on your county, and you pay the county directly, not Annapolis. Understanding which bill goes where and when it's due prevents late fees and keeps your account current.

Key Takeaways

• Maryland state income tax is withheld from paychecks for employees, but self-employed people and those with other income must pay quarterly estimated taxes by the 15th of April, June, September, and January.
• Property tax is collected by your county, not the state, and is billed separately from income tax; payment deadlines and frequency vary by county.
• You can pay Maryland income tax online through the Department of Revenue website, by mail, or through your employer's payroll system; property tax is paid to your county tax collector.
• Late income tax payments incur a failure-to-pay penalty of 0.5% per month plus interest; property tax penalties also begin accruing after the due date.
• If you cannot pay in full, Maryland offers payment plans for both income and property tax through the Department of Revenue and your county respectively.

How Maryland income tax is withheld and when you owe quarterly payments

If you receive a W-2 paycheck, your employer withholds Maryland income tax automatically based on the W-4 form you filed. The amount depends on your filing status, number of dependents, and income level. Your employer sends that withheld money to the Maryland Department of Revenue on your behalf, and it counts toward your annual tax liability. You do not send in a separate payment unless your withholding was too low.

If you are self-employed, a contractor, or have income that is not subject to withholding (rental income, investment gains, business profits), you must make quarterly estimated tax payments. These are due on April 15, June 15, September 15, and January 15 of the following year. You calculate what you expect to owe for the year, divide by four, and send each payment to the Maryland Department of Revenue. Missing a quarterly payment triggers a penalty even if you pay the full amount when you file your annual return.

Where to send income tax payments and accepted payment methods

The Maryland Department of Revenue accepts income tax payments online through its website (marylandtaxes.gov), by mail, or through an authorized payment processor. Online payment is the fastest route and gives you an immediate confirmation number. You can pay by electronic bank transfer (ACH), debit card, or credit card, though credit card payments charge a convenience fee of roughly 2% to 3%.

If you mail a check, send it to the Maryland Department of Revenue at the address listed on your tax notice or the department's website. Include your Social Security number or federal employer identification number on the check. Mail payments take 7 to 10 business days to post, so send early if you are close to the deadline. If you pay through your employer's payroll system (for estimated taxes), confirm with payroll that the payment is being routed to Maryland, not just withheld from your check.

Property tax: County billing, payment deadlines, and where your money goes

Property tax is not a state payment—it is a county tax. Your county assessor determines the assessed value of your home, and your county tax collector bills you based on the county's tax rate. The bill arrives separately from any state income tax notice. Payment deadlines vary by county; some bill twice yearly (usually in May and November), others once yearly. Check your county's tax collector website or your bill itself for the exact due date in your jurisdiction.

You pay property tax directly to your county tax collector, not to the state. Most counties accept online payments through their websites, by mail, or in person at the tax office. Some counties offer automatic bank draft (ACH) if you want the payment deducted on a set date each month or quarter. Property tax is a lien on your home, meaning unpaid taxes can eventually lead to a tax sale. Late payments incur penalties and interest that compound monthly, so paying on time or setting up a payment plan early is critical.

Late payment penalties, interest, and what happens if you miss a deadline

Maryland income tax that is not paid by the due date incurs a failure-to-pay penalty of 0.5% per month (or part of a month) of the unpaid tax, up to a maximum of 25%. Interest accrues daily at a rate set by the state (currently around 8% annually, but this changes quarterly). The penalty and interest compound, so the longer you wait, the more you owe beyond the original tax.

Property tax penalties also begin accruing after the due date. Most counties charge a penalty of 3% to 10% of the unpaid tax, plus interest. Some counties offer a grace period of a few days, but do not assume this applies to yours—check your bill or county website. If property tax remains unpaid for several years, the county may file a tax lien against your home or schedule a tax sale. Income tax debt can result in wage garnishment, bank levies, or a hold on your state tax refund.

Setting up a payment plan if you cannot pay in full

The Maryland Department of Revenue offers payment plans (called installment agreements) for income tax debt. You can request a plan online, by phone, or by mail. The plan allows you to pay the debt over time, usually 12 to 60 months depending on the amount owed. You must still pay penalties and interest, but spreading the payments makes the monthly amount manageable. A payment plan does not stop interest from accruing, so paying faster saves money.

Your county tax collector also offers payment plans for property tax arrears. Contact your county's tax office directly to discuss options. Some counties allow you to pay in monthly installments; others require a lump-sum payment by a certain date or the debt goes to a tax sale. If you are facing property tax foreclosure, some counties have hardship programs or can delay the sale if you are working with a payment plan. Do not wait until a sale is scheduled—reach out to your county as soon as you know you will miss a payment.

Amended returns, refunds, and correcting overpayments

If you overpaid Maryland income tax (for example, your employer withheld too much), you can claim a refund when you file your annual return. The Maryland Department of Revenue processes refunds within 4 to 8 weeks if you file electronically and choose direct deposit. Paper returns take longer. If you filed an incorrect return and owe additional tax, you can file an amended return (Form 502X) within three years of the original filing date.

If you overpaid property tax (for instance, you paid twice by mistake or the assessment was later reduced), contact your county tax collector to request a refund or credit. Property tax refunds are usually issued as a check or applied to future bills. Keep copies of all payment receipts and correspondence in case you need to prove payment or dispute a bill.

Frequently Asked Questions

What if my employer did not withhold Maryland tax from my paycheck?

Contact your payroll department immediately and provide a corrected W-4 form. If the withholding shortfall is large, you may owe when you file your return. You can also make a voluntary payment to the Department of Revenue now to reduce what you owe later. If your employer failed to withhold intentionally or due to negligence, you may have a claim against them, but the state will still expect you to pay the tax owed.

Can I pay Maryland taxes by credit card or debit card?

Yes, both are accepted through the Department of Revenue's online payment system. Credit and debit card payments charge a convenience fee (roughly 2% to 3% of the payment amount), so the total you pay is higher than the tax itself. ACH bank transfer and checks do not charge a fee.

What happens if I pay late but before the tax sale?

For income tax, you owe the original tax plus penalties and interest. For property tax, the same applies, but if a tax sale has been scheduled, paying late may not stop it—contact your county immediately to confirm. Some counties will halt a sale if you pay in full or enter a payment plan before the sale date.

Do I have to file a Maryland return if I only work in Maryland but live out of state?

Yes, Maryland taxes income earned within the state. You file a Maryland return for wages, self-employment income, or other income from Maryland sources, even if you live elsewhere. You may also owe tax in your home state, so check both states' rules to avoid double taxation.

Can I set up automatic payments for property tax?

Many counties offer automatic bank draft (ACH) for property tax. Contact your county tax collector to enroll. You choose the payment date and amount, and the county withdraws it from your bank account automatically. This prevents missed payments and late fees, though you remain responsible if the draft fails due to insufficient funds.